阅读说明：本技术 多频天线装置 (Multi-frequency antenna device ) 是由 周志伸 叶宗寿 杨翔程 林沛任 于 2018-08-02 设计创作，主要内容包括：一种多频天线装置,包含天线单元及频率切换单元。天线单元包括绝缘基体,及设置于绝缘基体表面且接地的第一导电层与第二导电层,且第一导电层电连接一射频电路。频率切换单元与天线单元并联,于第一切换状态时与天线单元共同产生第一共振频率,于第二切换状态时与天线单元共同产生一第二共振频率。通过所述频率切换单元于切换至不同切换状态时,会与所述天线单元共同产生不同共振频率的设计,使得所述多频天线装置具备多频切换的功能,而能够用于和多种无线通信装置进行通讯与数据传输,是一种相当创新且方便实用的多频天线装置设计。(A multi-frequency antenna device includes an antenna unit and a frequency switching unit. The antenna unit comprises an insulating base body, a first conducting layer and a second conducting layer, wherein the first conducting layer and the second conducting layer are arranged on the surface of the insulating base body and are grounded, and the first conducting layer is electrically connected with a radio frequency circuit. The frequency switching unit is connected with the antenna unit in parallel, and generates a first resonance frequency together with the antenna unit in a first switching state and generates a second resonance frequency together with the antenna unit in a second switching state. The frequency switching unit and the antenna unit jointly generate different resonant frequencies when switched to different switching states, so that the multi-frequency antenna device has a multi-frequency switching function and can be used for communicating and transmitting data with various wireless communication devices, and the design of the multi-frequency antenna device is quite innovative, convenient and practical.)

1. A multi-frequency antenna device suitable for electrically connecting to a radio frequency circuit, the multi-frequency antenna device comprising an antenna unit having an insulating substrate including a first surface and a second surface opposite to each other with the insulating substrate therebetween, and a first conductive layer and a second conductive layer disposed on the surface of the insulating substrate, the antenna unit being electrically connected to a first ground line, a second ground line and a feed-in line, the first conductive layer and the second conductive layer being grounded via the first ground line and the second ground line, respectively, the first conductive layer being electrically connected to the feed-in terminal of the radio frequency circuit via the feed-in line, the multi-frequency antenna device comprising: the multi-frequency antenna device also comprises a frequency switching unit, wherein the frequency switching unit is provided with a switching component and a first frequency modulation component, and is electrically connected with the feed-in wire and the second grounding wire and connected with the antenna unit in parallel; the switching assembly can generate at least two switching states, and is electrically connected with the feed-in wire in a first switching state and electrically connected with the second grounding wire through the first frequency modulation assembly; when the switching component is in a second switching state, the feeding line is electrically connected with the switching component, and the switching component and the first frequency modulation component are disconnected; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency; when the frequency switching unit is in the second switching state, a second resonant frequency is generated together with the antenna unit.

2. The multi-frequency antenna apparatus of claim 1, wherein: the frequency switching unit is further provided with a second frequency modulation component, and when the switching component is switched to the second switching state, the switching component is electrically connected with the feed-in line, is electrically connected with the second grounding line through the second frequency modulation component, and generates the second resonant frequency together with the antenna unit.

3. The multi-frequency antenna apparatus of claim 2, wherein: the switching component can also be switched to a third switching state, and when the switching component is switched to the third switching state, the switching component is electrically connected with the feed-in line and becomes an open circuit with the first frequency modulation component and the second frequency modulation component; when the frequency switching unit is in the third switching state, a third resonant frequency is generated together with the antenna unit.

4. The multi-frequency antenna apparatus of claim 3, wherein: the frequency switching unit is further provided with a third frequency modulation component, and when the switching component is switched to the third switching state, the switching component is electrically connected with the feed-in line, is electrically connected with the second grounding line through the third frequency modulation component, and generates a third resonant frequency together with the antenna unit.

5. The multi-frequency antenna device of claim 1, 2, 3 or 4, wherein: the multi-frequency antenna device further comprises an impedance adjusting unit connected in parallel with the antenna unit and used for adjusting the equivalent impedance of the antenna unit.

6. The multi-frequency antenna device of claim 1, 2, 3 or 4, wherein: the multi-frequency antenna device further comprises a secondary frequency modulation unit, the antenna unit is electrically connected with the secondary frequency modulation unit through a second grounding wire and is grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the resonance frequency of the multi-frequency antenna device.

7. The multi-frequency antenna device of claim 1, 2, 3 or 4, wherein: the first conductive layer and the second conductive layer are arranged on the first surface, and a space is formed between the first conductive layer and the second conductive layer.

8. The multi-frequency antenna device of claim 1, 2, 3 or 4, wherein: the first conducting layer is arranged on the first surface, the second conducting layer is arranged on the second surface, and the projection of the first conducting layer on the second surface is overlapped with partial area of the second conducting layer.

9. a multifrequency antenna device is suitable for being electrically connected with a radio frequency circuit, and comprises an antenna unit, a first antenna unit and a second antenna unit, wherein the antenna unit is provided with an insulating substrate and comprises a first surface and a second surface which are opposite to each other through the insulating substrate, and a first conducting layer and a second conducting layer which are arranged on the surface of the insulating substrate; the antenna unit is electrically connected with a first grounding wire, a second grounding wire and a feed-in wire respectively, the first conducting layer is grounded through the first grounding wire, the second conducting layer is electrically connected with the second grounding wire, and the first conducting layer is electrically connected with the feed-in end of the radio frequency circuit through the feed-in wire, and the antenna unit is characterized in that: the multi-frequency antenna device further comprises a frequency switching unit, wherein the frequency switching unit is provided with a switching component, a first frequency modulation component and a second frequency modulation component, and the antenna unit is electrically connected with the frequency switching unit through the second grounding wire and is grounded through the frequency switching unit; the switching component can generate at least two switching states, and in the first switching state, the switching component is grounded through the first frequency modulation component; in a second switching state, the switching component is grounded through the second frequency modulation component; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency; when the frequency switching unit is in the second switching state, a second resonant frequency is generated together with the antenna unit.

10. The multi-frequency antenna apparatus of claim 9, wherein: the frequency switching unit is also provided with a third frequency modulation component, and the switching component can be switched to a third switching state; in a third switching state, the switching element is grounded via the third frequency modulation element and generates a third resonant frequency together with the antenna unit.

11. The multi-frequency antenna device of claim 9 or 10, wherein: the first conductive layer and the second conductive layer are arranged on the first surface, and a space is formed between the first conductive layer and the second conductive layer.

12. The multi-frequency antenna device of claim 9 or 10, wherein: the first conducting layer is arranged on the first surface, the second conducting layer is arranged on the second surface, and the projection of the first conducting layer on the second surface is overlapped with partial area of the second conducting layer.

13. a multifrequency antenna device is suitable for being electrically connected with a radio frequency circuit, and comprises an antenna unit, a first antenna unit and a second antenna unit, wherein the antenna unit is provided with an insulating substrate and comprises a first surface and a second surface which are opposite to each other through the insulating substrate, and a first conducting layer and a second conducting layer which are arranged on the surface of the insulating substrate; the antenna unit is electrically connected with a first grounding wire, a second grounding wire and a feed-in wire respectively, the first conducting layer is grounded through the first grounding wire, and the second conducting layer is grounded through the second grounding wire, and the antenna unit is characterized in that: the antenna unit further comprises a third conductive layer, the third conductive layer is electrically connected with a feed-in end of the radio frequency circuit through the feed-in line, the feed-in line is grounded through a third grounding line, the multi-frequency antenna device further comprises a frequency switching unit, the frequency switching unit is provided with a switching component and a first frequency modulation component, and the frequency switching unit is electrically connected with the feed-in line and the second grounding line respectively and is connected with the antenna unit in parallel; the switching assembly can generate at least two switching states, and is electrically connected with the feed-in wire and the second grounding wire through the first frequency modulation assembly in the first switching state; when the switching component is in a second switching state, the feeding line is electrically connected with the switching component, and the switching component and the first frequency modulation component are disconnected; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency, and the antenna unit is grounded through a first grounding wire to generate a second resonant frequency; when the switching assembly is in the second switching state, the switching assembly and the antenna unit jointly generate a third resonant frequency, and the antenna unit is grounded through the first grounding wire to generate a fourth resonant frequency.

14. The multi-frequency antenna apparatus of claim 13, wherein: the frequency switching unit is further provided with a second frequency modulation component, when the frequency switching unit is switched to the second switching state, the switching component is electrically connected with the feed-in line and the second grounding line through the second frequency modulation component, and the switching component and the antenna unit jointly generate the third resonant frequency.

15. The multi-frequency antenna apparatus of claim 13, wherein: the multi-frequency antenna device further comprises a secondary frequency modulation unit, the antenna unit is electrically connected with the secondary frequency modulation unit through the second grounding wire and is grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the first resonance frequency or the third resonance frequency of the multi-frequency antenna device.

16. the multi-frequency antenna apparatus of claim 13, wherein: the multi-frequency antenna device further comprises a secondary frequency modulation unit, wherein the antenna unit is electrically connected with the secondary frequency modulation unit through the first grounding wire and is grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the second resonance frequency or the fourth resonance frequency.

17. The multi-frequency antenna device of claim 13, 14, 15 or 16, wherein: the first conductive layer and the second conductive layer are disposed on the first surface, the third conductive layer is disposed on the second surface, a projection of the first conductive layer on the second surface overlaps with a portion of the third conductive layer, and a projection of the second conductive layer on the second surface overlaps with a portion of the third conductive layer.

18. a multi-frequency antenna device suitable for electrically connecting to a radio frequency circuit, the multi-frequency antenna device comprising an antenna unit having an insulating substrate including a first surface and a second surface opposite to each other with the insulating substrate therebetween, and a first conductive layer and a second conductive layer disposed on the surface of the insulating substrate, the antenna unit being electrically connected to a first ground line, a second ground line and a feed-in line, respectively, the first conductive layer being grounded via the first ground line, the second conductive layer being electrically connected to the second ground line, the multi-frequency antenna device being characterized in that: the antenna unit further comprises a third conductive layer, the third conductive layer is electrically connected with a feed-in end of the radio frequency circuit through the feed-in line, the feed-in line is grounded through a third grounding line, the multi-frequency antenna device further comprises a frequency switching unit, the frequency switching unit comprises a switching component, a first frequency modulation component and a second frequency modulation component, and the antenna unit is electrically connected with the frequency switching unit through the second grounding line and grounded through the frequency switching unit; the switching component can generate at least two switching states, and the switching component is grounded through the first frequency modulation component in the first switching state; in a second switching state, the switching component is grounded through the second frequency modulation component; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonance frequency, and the antenna unit is grounded through the first grounding wire to generate a second resonance frequency; when the frequency switching unit is in the second switching state, the frequency switching unit and the antenna unit jointly generate a third resonant frequency, and the antenna unit is grounded through the first grounding wire to generate a fourth resonant frequency.

19. The multi-frequency antenna apparatus of claim 18, wherein: the multi-frequency antenna device further comprises a secondary frequency modulation unit, wherein the antenna unit is electrically connected with the secondary frequency modulation unit through the first grounding wire and is grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the second resonance frequency or the fourth resonance frequency.

20. The multi-frequency antenna apparatus of claim 18, wherein: the first conductive layer and the second conductive layer are disposed on the first surface, the third conductive layer is disposed on the second surface, a projection of the first conductive layer on the second surface overlaps with a portion of the third conductive layer, and a projection of the second conductive layer on the second surface overlaps with a portion of the third conductive layer.

Technical Field

The present invention relates to an antenna device, and more particularly, to a multi-frequency antenna device.

Background

In recent years, development architecture of the internet of things has become mature, communication and data transmission among electronic devices have largely adopted wireless communication technology, and in order to enable equipment system manufacturers to more conveniently integrate wireless communication circuits into circuit systems when developing and designing new products, antenna design of the wireless communication circuits has gradually developed towards modularization. Through the design of modularization, volume reduction or thinning, the antenna is convenient for an antenna manufacturer to produce in large quantities, and an equipment system manufacturer is also favorable for directly integrating the antenna into electronic equipment.

However, the function design of the electronic device is more and more diversified, for example, the electronic device has the functions of GPS and WiFi or bluetooth, or has the functions of 4G mobile communication and internet of things, if the electronic device respectively adopts a single-frequency antenna module for various communication functions, the miniaturization of the electronic device will be affected, and the production cost of the electronic device will be increased. Therefore, multi-band antenna devices capable of switching frequency bands according to the requirements have become the mainstream of wireless communication devices.

Disclosure of Invention

It is therefore an object of the present invention to provide a multi-frequency antenna apparatus that ameliorates at least one of the disadvantages of the prior art.

The invention relates to a multi-frequency antenna device which is suitable for being electrically connected with a radio frequency circuit and comprises an antenna unit and a frequency switching unit electrically connected with the antenna unit. The antenna unit is provided with an insulating base body, a first conducting layer and a second conducting layer, wherein the insulating base body comprises a first surface and a second surface which are opposite to each other through the insulating base body, and the first conducting layer and the second conducting layer are arranged on the surface of the insulating base body. The antenna unit is electrically connected with a first grounding wire and a second grounding wire, and the first conducting layer and the second conducting layer are respectively grounded through the first grounding wire and the second grounding wire; the antenna unit is further electrically connected with a feed-in wire, and the first conducting layer is electrically connected with a feed-in end of the radio frequency circuit through the feed-in wire. The frequency switching unit is provided with a switching assembly and a first frequency modulation assembly, is electrically connected with the feed-in wire and the second grounding wire and is connected with the antenna unit in parallel; the switching assembly can generate at least two switching states, and is electrically connected with the feed-in wire in a first switching state and electrically connected with the second grounding wire through the first frequency modulation assembly; when the switching component is in a second switching state, the feeding line is electrically connected with the switching component, and the switching component and the first frequency modulation component are disconnected; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency; when the frequency switching unit is in the second switching state, a second resonant frequency is generated together with the antenna unit.

In the multi-frequency antenna device, the frequency switching unit further includes a second frequency modulation component, and when the switching component is switched to the second switching state, the switching component is electrically connected to the feed line, electrically connected to the second ground line via the second frequency modulation component, and generates the second resonant frequency together with the antenna unit.

In the multi-frequency antenna device, the switching component can be switched to a third switching state, and when the switching component is switched to the third switching state, the switching component is electrically connected with the feed-in line and becomes an open circuit with the first frequency modulation component and the second frequency modulation component; when the frequency switching unit is in the third switching state, a third resonant frequency is generated together with the antenna unit.

In the multi-frequency antenna device, the frequency switching unit further includes a third frequency modulation component, and when the switching component is switched to the third switching state, the switching component is electrically connected to the feed-in line, electrically connected to the second ground line via the third frequency modulation component, and generates the third resonant frequency together with the antenna unit.

the multi-frequency antenna device further comprises an impedance adjusting unit which is connected with the antenna unit in parallel and used for adjusting the equivalent impedance of the antenna unit.

The multi-frequency antenna device further comprises a secondary frequency modulation unit, wherein the antenna unit is electrically connected with the secondary frequency modulation unit through a second grounding wire and is grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the resonance frequency of the multi-frequency antenna device.

In the multi-frequency antenna device, the first conductive layer and the second conductive layer are disposed on the first surface, and a gap is formed between the first conductive layer and the second conductive layer.

In the multi-frequency antenna device, the first conductive layer is disposed on the first surface, the second conductive layer is disposed on the second surface, and a projection of the first conductive layer on the second surface overlaps with a partial region of the second conductive layer.

The invention relates to a multi-frequency antenna device which is suitable for being electrically connected with a radio frequency circuit and comprises an antenna unit and a frequency switching unit electrically connected with the antenna unit. The antenna unit is provided with an insulating base body, a first conducting layer and a second conducting layer, wherein the insulating base body comprises a first surface and a second surface which are opposite to each other through the insulating base body, and the first conducting layer and the second conducting layer are arranged on the surface of the insulating base body. The antenna unit is electrically connected with a first grounding wire and a second grounding wire, the first conducting layer is grounded through the first grounding wire, the second conducting layer is electrically connected with the second grounding wire, the antenna unit is also electrically connected with a feed-in wire, and the first conducting layer is electrically connected with the feed-in end of the radio frequency circuit through the feed-in wire. The antenna unit is electrically connected with the frequency switching unit through the second grounding wire and is grounded through the frequency switching unit; the switching component can generate at least two switching states, and in the first switching state, the switching component is grounded through the first frequency modulation component; in a second switching state, the switching component is grounded through the second frequency modulation component; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency; when the frequency switching unit is in the second switching state, a second resonant frequency is generated together with the antenna unit.

In the multi-frequency antenna device, the frequency switching unit is further provided with a third frequency modulation component, and the switching component can be switched to a third switching state; in a third switching state, the switching element is grounded via the third frequency modulation element and generates a third resonant frequency together with the antenna unit.

In the multi-frequency antenna device, the first conductive layer and the second conductive layer are disposed on the first surface, and a gap is formed between the first conductive layer and the second conductive layer.

In the multi-frequency antenna device, the first conductive layer is disposed on the first surface, the second conductive layer is disposed on the second surface, and a projection of the first conductive layer on the second surface overlaps with a partial region of the second conductive layer.

The invention relates to a multi-frequency antenna device which is suitable for being electrically connected with a radio frequency circuit and comprises an antenna unit and a frequency switching unit electrically connected with the antenna unit. The antenna unit is provided with an insulating base body, a first conducting layer, a second conducting layer and a third conducting layer, wherein the insulating base body comprises a first surface and a second surface which are opposite to each other through the insulating base body; the antenna unit is electrically connected with a first grounding wire and a second grounding wire, and the first conducting layer is grounded through the first grounding wire; the second conductive layer is grounded through the second ground wire, the antenna unit is further electrically connected with a feed-in wire, the third conductive layer is electrically connected with a feed-in end of the radio frequency circuit through the feed-in wire, and the feed-in wire is also grounded through a third ground wire. The frequency switching unit is provided with a switching assembly and a first frequency modulation assembly, is electrically connected with the feed-in wire and the second grounding wire and is connected with the antenna unit in parallel; the switching assembly can generate at least two switching states, and is electrically connected with the feed-in wire and the second grounding wire through the first frequency modulation assembly in the first switching state; when the first frequency modulation component is in a first switching state, the switching component is electrically connected with the feed-in wire and becomes an open circuit with the first frequency modulation component; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonant frequency, and the antenna unit generates a second resonant frequency through a first grounding wire; when the switching assembly is in the second switching state, the switching assembly and the antenna unit jointly generate a third resonant frequency, and the antenna unit generates a fourth resonant frequency through the first grounding wire.

In the multi-frequency antenna device, the frequency switching unit further includes a second frequency modulation component, and when the frequency switching unit is switched to the second switching state, the switching component is electrically connected to the feed-in line and the second ground line via the second frequency modulation component, and generates the third resonant frequency together with the antenna unit.

The multi-frequency antenna device further includes a secondary frequency modulation unit, the antenna unit is electrically connected to the secondary frequency modulation unit through the second ground line and grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the first resonance frequency or the third resonance frequency of the multi-frequency antenna device.

The multi-frequency antenna device further includes a secondary frequency modulation unit, the antenna unit is electrically connected to the secondary frequency modulation unit through the first ground line and grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the second resonance frequency or the fourth resonance frequency.

the multi-frequency antenna device of the invention is characterized in that: the first conductive layer and the second conductive layer are disposed on the first surface, the third conductive layer is disposed on the second surface, a projection of the first conductive layer on the second surface overlaps with a portion of the third conductive layer, and a projection of the second conductive layer on the second surface overlaps with a portion of the third conductive layer.

The invention relates to a multi-frequency antenna device which is suitable for being electrically connected with a radio frequency circuit and comprises an antenna unit and a frequency switching unit electrically connected with the antenna unit. The antenna unit is provided with an insulating base body, a first conducting layer, a second conducting layer and a third conducting layer, wherein the insulating base body comprises a first surface and a second surface which are opposite to each other through the insulating base body; the antenna unit is electrically connected with a first grounding wire and a second grounding wire, and the first conducting layer is grounded through the first grounding wire; the second conductive layer is electrically connected with the second grounding wire, the antenna unit is also electrically connected with a feed-in wire, the third conductive layer is electrically connected with a feed-in end of the radio frequency circuit through the feed-in wire, and the feed-in wire is also grounded through a third grounding wire. The antenna unit is electrically connected with the frequency switching unit through the second grounding wire and is grounded through the frequency switching unit; the switching component can generate at least two switching states, and the switching component is grounded through the first frequency modulation component in the first switching state; in a second switching state, the switching component is grounded through the second frequency modulation component; when the frequency switching unit is in the first switching state, the frequency switching unit and the antenna unit jointly generate a first resonance frequency, and the antenna unit generates a second resonance frequency through the first grounding wire; when the frequency switching unit is in the second switching state, the frequency switching unit and the antenna unit jointly generate a third resonance frequency, and the antenna unit generates a fourth resonance frequency through the first grounding wire.

The multi-frequency antenna device further includes a secondary frequency modulation unit, the antenna unit is electrically connected to the secondary frequency modulation unit through the first ground line and grounded through the secondary frequency modulation unit, and the secondary frequency modulation unit can adjust the second resonance frequency or the fourth resonance frequency.

In the multi-band antenna apparatus of the present invention, the first conductive layer and the second conductive layer are disposed on the first surface, the third conductive layer is disposed on the second surface, a projection of the first conductive layer on the second surface overlaps with a portion of the third conductive layer, and a projection of the second conductive layer on the second surface overlaps with a portion of the third conductive layer.

The invention has the beneficial effects that: the frequency switching unit and the antenna unit jointly generate different resonant frequencies when switched to different switching states, so that the multi-frequency antenna device has a multi-frequency switching function and can be used for communicating and transmitting data with various wireless communication devices, and the design of the multi-frequency antenna device is quite innovative, convenient and practical.

Drawings

Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:

Fig. 1 is a circuit architecture diagram of a multi-band antenna apparatus according to a first embodiment of the present invention, illustrating a frequency switching unit in a first switching state;

FIG. 2 is a circuit diagram similar to FIG. 1, illustrating the frequency switching unit in a second switching state;

Fig. 3 is a perspective view of an antenna unit of the first embodiment;

Fig. 4 is a perspective view of another implementation of the antenna unit of the first embodiment;

Fig. 5 is a perspective view of another implementation of the antenna unit of the first embodiment;

fig. 6 is a circuit configuration diagram of a second embodiment of the multi-frequency antenna apparatus of the present invention;

Fig. 7 is a circuit configuration diagram of a multi-frequency antenna apparatus according to a third embodiment of the present invention;

FIG. 8 is a circuit diagram illustrating another implementation of the third embodiment, in which the frequency switching unit has two sets of frequency modulation components;

FIG. 9 is a circuit diagram similar to FIG. 8, illustrating the frequency switching unit in a third switching state;

Fig. 10 is a circuit configuration diagram of a fourth embodiment of the multi-frequency antenna apparatus of the present invention;

Fig. 11 is a circuit configuration diagram of a fifth embodiment of the multi-frequency antenna apparatus of the present invention;

Fig. 12 is a circuit configuration diagram of a sixth embodiment of the multi-frequency antenna apparatus of the present invention;

FIG. 13 is a circuit diagram similar to FIG. 12, illustrating the frequency switching unit in a second switching state;

Fig. 14 is a perspective view of the antenna unit of the sixth embodiment;

FIG. 15 is a perspective view of another implementation of the antenna unit of the sixth embodiment

Fig. 16 is a circuit configuration diagram of a seventh embodiment of the multi-frequency antenna apparatus of the present invention;

Fig. 17 is a circuit configuration diagram of an eighth embodiment of the multi-frequency antenna apparatus of the present invention; and

Fig. 18 is a circuit configuration diagram of a ninth embodiment of the multi-frequency antenna apparatus of the present invention.

Detailed Description

The present invention will be further described with respect to the following examples, which are provided merely as illustrations to facilitate the description of the invention and should not be construed as limitations on the practice of the invention, but rather, like elements are identified with like reference numerals throughout the examples.

Referring to fig. 1, 2 and 3, a multi-band antenna device 200 according to a first embodiment of the present invention is adapted to be electrically connected to a feeding terminal of a radio frequency circuit 800 of a wireless communication device. The multi-band antenna apparatus 200 includes an antenna unit 3 and a frequency switching unit 4 electrically connected to the antenna unit 3.

The antenna unit 3 has an insulating substrate 31, and a first conductive layer 32 and a second conductive layer 33 disposed on the surface of the insulating substrate 31. The insulating substrate 31 has a first surface 311 and a second surface 312 opposite to each other with the insulating substrate 31 therebetween, the first conductive layer 32 and the second conductive layer 33 are respectively disposed on the first surface 311 and the second surface 312, and a projection of the first conductive layer 32 on the second surface 312 overlaps with a partial area of the second conductive layer 33, and the overlapping portion of the two can generate a capacitive effect, so that the multi-band antenna apparatus can generate a specific resonant frequency. In addition, the first conductive layer 32 is grounded via a first ground line 701, the second conductive layer 33 is grounded via a second ground line 702, and the first conductive layer 32 is electrically connected to a feeding terminal of the rf circuit 800 via a feeding line 703.

the frequency switching unit 4 is electrically connected to the feeding line 703 and the second grounding line 702 respectively and connected in parallel with the antenna unit 3, the frequency switching unit 4 has a switching element 41 and a first frequency modulation element 42, the switching element 41 is an element capable of generating a switching action, for example, a switching integrated circuit (Switch IC) having two switching modes, and the first frequency modulation element 42 is mainly composed of passive elements such as a capacitor, an inductor and/or a resistor.

the frequency switching unit 4 can be switched between a first switching state and a second switching state by the switching element 41, in the first switching state, the switching element 41 is electrically connected to the feeding line 703 and the first frequency modulation element 42, and is electrically connected to the second ground line 702 through the first frequency modulation element 42 and grounded, as shown in fig. 1. In the second switching state, the switching element 41 is electrically connected to the feeding line 703 and becomes disconnected from the first frequency modulation element 42, as shown in fig. 2. When the frequency switching unit 4 is in the first switching state, the frequency switching unit 4 and the antenna unit 3 generate a first resonant frequency together. When the frequency switching unit 4 is in the second switching state, the frequency switching unit 4 and the antenna unit 3 generate a second resonant frequency together.

When the multi-band antenna apparatus 200 of the present invention is electrically connected to the rf circuit 800 for use, the first resonant frequency can be adjusted by changing the capacitance, inductance and/or resistance of the components of the first frequency modulation element 42.

Referring to fig. 3, in the first embodiment, the first conductive layer 32 and the second conductive layer 33 are respectively disposed on the first surface 311 and the second surface 312, but in another implementation aspect of the present invention, the first conductive layer 32 and the second conductive layer 33 may be disposed on the same surface, as shown in fig. 4, and a space is formed between the first conductive layer 32 and the second conductive layer 33. Alternatively, the first conductive layer 32 and the second conductive layer 33 are stacked in the insulating substrate 31 with a gap therebetween, as shown in fig. 5, a space is provided between the first conductive layer 32 and the second conductive layer 33, and a projection of the first conductive layer 32 on a plane where the second conductive layer 33 is disposed overlaps with a partial region of the second conductive layer 33. Since the conductive layers 32 and 33 of the antenna unit 3 have many shapes and arrangement forms, the present invention is not limited to the above-described embodiments.

Referring to fig. 6, a second embodiment of the multi-frequency antenna device 200 of the present invention is shown, which is different from the first embodiment in that: the difference in the circuit structure of the frequency switching unit 4, and the multi-frequency antenna apparatus 200 further includes an impedance adjusting unit 5 and a sub-fm unit 6 electrically connected to the antenna unit 3. The impedance adjusting unit 5 and the sub-frequency modulation unit 6 can be alternatively disposed, so the implementation is not limited to the above-mentioned aspect.

The frequency switching unit 4 further has a second frequency modulation element 43, and the second frequency modulation element 43 is mainly composed of a capacitor, an inductor and/or a resistor. When the frequency switching unit 4 is switched to the second switching state, the switching element 41 is electrically connected to the feeding line 703 and the second frequency modulation element 43, and is electrically connected to the second ground line 702 through the second frequency modulation element 43, and at this time, the frequency switching unit 4, the impedance adjusting unit 5, the sub-frequency modulation unit 6 and the antenna unit 3 generate the second resonant frequency together.

the impedance adjusting unit 5 is electrically connected to the feeding line 703 and the second ground line 702 and connected to the antenna unit 3 in parallel, and can be used for adjusting the impedance and frequency of the multi-frequency antenna device.

The secondary frequency modulation unit 6 is mainly composed of passive components such as a capacitor, an inductor and/or a resistor, and the antenna unit 3 is electrically connected to the secondary frequency modulation unit 6 via the second ground line 702 and grounded, and can be used for adjusting the first resonance frequency or the second resonance frequency generated by the antenna unit 3 and the frequency switching unit 4 together.

When the multi-frequency antenna device 200 of the second embodiment is electrically connected to the rf circuit 800 for use, if the resonant frequency needs to be adjusted, the first resonant frequency or the second resonant frequency can be tuned by changing the tuning elements 42 and 43 or the secondary tuning unit 6, i.e. changing the capacitance, inductance and/or resistance of the tuning elements 42 and 43 or the secondary tuning unit 6, so that the resonant frequency of the multi-frequency antenna device 200 can meet the requirement of the rf circuit 800.

Referring to fig. 7, a third embodiment of the multi-frequency antenna device 200 of the present invention is shown, and the difference between the third embodiment and the second embodiment lies in: the frequency switching unit 4 is switchable between three switching states and further comprises a third frequency modulation element 44.

in the third embodiment, the third frequency modulation element 44 is mainly composed of passive elements such as a capacitor, an inductor and/or a resistor. The switching element 41 of the frequency switching unit 4 is switchable between three switching states, in addition to the first switching state and the second switching state, to a third switching state. When the frequency switching unit 4 is switched to the third switching state, the switching element 41 is electrically connected to the feeding line 703 and the third frequency modulation element 44, and is electrically connected to the second ground line 702 through the third frequency modulation element 44, and is grounded through the sub-frequency modulation unit 6. In this case, the frequency switching unit 4, the impedance adjusting unit 5, the sub-tuning unit 6 and the antenna unit 3 generate a third resonant frequency together, and in practice, the third resonant frequency may be adjusted by changing the capacitance, inductance and/or resistance of the third tuning element 44 and/or the sub-tuning unit 6. The multi-band antenna device 200 can switch three resonant frequencies by the circuit design.

In another implementation of the present invention, referring to fig. 8 and 9, the third fm assembly 44 may not be provided, that is, when the switching assembly 41 is switched to the third switching state, the first fm assembly 42, the second fm assembly 43, and the second ground line 702 become open circuits, and at this time, the frequency switching unit 4, the impedance adjusting unit 5, the sub-fm unit 6, and the antenna unit 3 may still generate a third resonant frequency, so that the entire triple-frequency antenna apparatus 200 may also have a switching function.

referring to fig. 10, a fourth embodiment of the multi-frequency antenna device 200 of the present invention is shown, which is different from the first embodiment in that: the difference of the electrical connection structure design of the frequency switching unit 4 and the antenna unit 3.

in the fourth embodiment, the antenna unit 3 is electrically connected to the frequency switching unit 4 via the second ground line 702 and grounded, and includes a switching element 41 capable of switching between two switching states, a first frequency modulation element 42 and a second frequency modulation element 43.

When the frequency switching unit 4 is switched to the first switching state, the switching element 41 is electrically connected to the second ground line 702 and the first frequency modulation element 42, and is grounded through the first frequency modulation element 42, so as to generate a first resonant frequency together with the antenna unit 3. When the frequency switching unit 4 is switched to the second switching state, the switching element 41 is electrically connected to the second ground line 702 and the second frequency modulation element 43, and is grounded via the second frequency modulation element 43, so as to generate a second resonant frequency together with the antenna unit 3. With this design, the multi-band antenna apparatus 200 can have dual-band switching function.

Referring to fig. 11, a fifth embodiment of the multi-frequency antenna device 200 of the present invention is different from the fourth embodiment in that: the switching element 41 is switchable between three switching states, and the frequency switching unit 4 further comprises a third frequency modulation element 44.

In the fifth embodiment, the frequency switching unit 4 can be switched to the first switching state and the second switching state described in the fourth embodiment, so as to generate the first resonant frequency and the second resonant frequency together with the antenna unit 3, and the frequency switching unit 4 can also be switched to a third switching state.

When the frequency switching unit 4 is switched to the third switching state, the switching element 41 is electrically connected to the second ground line 702 and the third frequency modulation element 44, and is grounded via the third frequency modulation element 44, so as to generate a third resonant frequency together with the antenna unit 3, or the third resonant frequency can be adjusted by changing a capacitance value, an inductance value and/or a resistance value of the third frequency modulation element 44.

Referring to fig. 12 and 13, a sixth embodiment of the multi-frequency antenna device 200 of the present invention is shown, which differs from the first embodiment in that: the structural design of the antenna unit 3 and the circuit connection are changed.

Referring to fig. 14, which is an implementation manner of the antenna unit 3 according to the sixth embodiment, the antenna unit 3 has an insulating substrate 31, and a first conductive layer 32, a second conductive layer 33 and a third conductive layer 34 respectively disposed on a surface of the insulating substrate 31. The insulating substrate 31 has a first surface 311 and a second surface 312 opposite to each other with the insulating substrate 31 therebetween, the first conductive layer 32 and the second conductive layer 33 are respectively disposed on the first surface 311, the third conductive layer 34 is disposed on the second surface 312, a projection of the first conductive layer 32 on the second surface 312 is partially overlapped with the third conductive layer 34, and a projection of the second conductive layer 33 on the second surface 312 is partially overlapped with the third conductive layer 34. The first conductive layer 32 is electrically connected to the first ground line 701 and is grounded, the second conductive layer 33 is electrically connected to the second ground line 702 and is grounded, the third conductive layer 34 is electrically connected to the feed-in line 703 and is used for electrically connecting to the feed-in terminal of the rf circuit 800, and the feed-in line 703 is also grounded via a third ground line 704.

The frequency switching unit 4 is electrically connected to the feeding line 703 and the second grounding line 702 respectively and connected to the antenna unit 3 in parallel, and the frequency switching unit 4 includes a switching element 41 capable of switching between two switching states and a first frequency modulation element 42. The first frequency modulation component 42 is mainly composed of a capacitor, an inductor and/or a resistor. When the frequency switching unit 4 is in the first switching state, as shown in fig. 12, the switching element 41 is electrically connected to the feeding line 703 and the first frequency modulation element 42, and is electrically connected to the second ground line 702 through the first frequency modulation element 42. When the frequency switching unit 4 is switched to the second switching state, as shown in fig. 13, the switching element 41 is electrically connected to the feeding line 703, and becomes an open circuit with the first frequency modulation element 42, but is not electrically connected to the second grounding line 702.

When the frequency switching unit 4 is switched to the first switching state, the antenna unit 3 and the frequency switching unit 4 generate a first resonant frequency together, and the antenna unit 3 is grounded through the first ground line 701 to generate a second resonant frequency. When the frequency switching unit 4 is switched to the second switching state, the antenna unit 3 and the frequency switching unit 4 generate a third resonant frequency together, and the antenna unit 3 is grounded through the first ground line 701 to generate a fourth resonant frequency.

referring to fig. 15, in another implementation manner of the antenna unit 3 according to the sixth embodiment, the antenna unit 3 includes an insulating substrate 31, and a first conductive layer 32, a second conductive layer 33, and a third conductive layer 34 respectively disposed on a surface of the insulating substrate 31. The insulating substrate 31 has a first surface 311 and a second surface 312 opposite to each other with the insulating substrate 31 therebetween, and the first conductive layer 32, the second conductive layer 33 and the third conductive layer 34 are disposed on the same surface at intervals, for example, all of the first surface 311, the first conductive layer 32 and the third conductive layer 34, and the second conductive layer 33 and the third conductive layer 34 have a distance therebetween. The first conductive layer 32 is electrically connected to the first ground line 701 and is grounded, the second conductive layer 33 is electrically connected to the second ground line 702 and is grounded, the third conductive layer 34 is electrically connected to the feed-in line 703 and is used for electrically connecting to the feed-in terminal of the rf circuit 800, and the feed-in line 703 is also grounded via a third ground line 704.

Through the circuit and structural design changes of the antenna unit 3 and the frequency switching unit 4, the multi-frequency antenna apparatus 200 can generate two resonant frequencies when switched between two switching states, so as to perform wireless communication and data transmission at the two frequencies respectively. After the multi-band antenna apparatus 200 is electrically connected to the rf circuit 800, the resonant frequency can be adjusted by changing the capacitance, inductance and/or resistance of the first tuning element 42, so as to meet the requirement of the rf circuit 800.

Referring to fig. 16, a seventh embodiment of the multi-frequency antenna device 200 of the present invention is shown, and the difference between the seventh embodiment and the sixth embodiment is: the multi-frequency antenna apparatus 200 further comprises two sub-frequency modulation units 6, and the frequency switching unit 4 further comprises a second frequency modulation element 43.

In the seventh embodiment, one end of the sub-fm unit 6 is electrically connected to the first conductive layer 32 and the second conductive layer 33 through the first ground line 701 and the second ground line 702, respectively, and the other end of the sub-fm unit 6 is grounded, respectively. Each sub-fm unit 6 is mainly composed of passive components such as capacitors, inductors, and/or resistors. The second frequency modulation element 43 is also mainly composed of passive elements such as capacitors, inductors and/or resistors.

when the frequency switching unit 4 is switched to the first switching state, the switching element 41 is electrically connected to the feeding line 703 and the first frequency modulation element 42, and is electrically connected to the second ground line 702 through the first frequency modulation element 42 and is grounded through the corresponding sub-frequency modulation unit 6, so as to generate the first resonance frequency together with the antenna unit 3, and the antenna unit 3 is also electrically connected to the sub-frequency modulation unit 6 through the first ground line 701, and is grounded through the sub-frequency modulation unit 6, and generates the second resonance frequency. When the frequency switching unit 4 is switched to the second switching state, the switching element 41 is electrically connected to the feeding line 703 and the second frequency modulation element 43, and is electrically connected to the second ground line 702 via the second frequency modulation element 43, and is further grounded via the corresponding sub-frequency modulation unit 6, so as to generate the third resonant frequency together with the antenna unit 3, and the antenna unit 3 is also electrically connected to the sub-frequency modulation unit 6 via the first ground line 701, and is grounded via the sub-frequency modulation unit 6, and generates the fourth resonant frequency.

In practice, the first resonant frequency, the second resonant frequency, the third resonant frequency and/or the fourth resonant frequency can be adjusted by changing the capacitance, inductance and/or resistance of the secondary tuning unit 6 and/or the tuning elements 42, 43. In another embodiment of the present invention, the secondary frequency modulation unit 6 is not essential, and only one of them or neither of them may be provided, and the resonance frequency is adjusted only by the frequency modulation components 42 and 43 of the frequency switching unit 4. When only the sub-fm unit 6 electrically connected to the second conductive layer 33 via the second ground line 702 is disposed, the sub-fm unit 6 can adjust the first resonance frequency or the third resonance frequency; when only the sub-fm unit 6 electrically connected to the first conductive layer 32 through the first ground line 701 is disposed, the sub-fm unit 6 can adjust the second resonance frequency or the fourth resonance frequency.

Referring to fig. 17, an eighth embodiment of the present invention is different from the seventh embodiment in that: the frequency switching unit 4 and the antenna unit 3 are electrically connected to each other.

in the eighth embodiment, the antenna unit 3 is connected in series with the frequency switching unit 4 through the second ground line 702 and is grounded, the frequency switching unit 4 can be switched between a first switching state and a second switching state, the frequency switching unit 4 includes a switching element 41, and a first frequency modulation element 42 and a second frequency modulation element 43.

When the frequency switching unit 4 is switched to the first switching state, the switching element 41 is electrically connected to the second ground line 702 and the first frequency modulation element 42, and is grounded via the first frequency modulation element 42, and when the frequency switching unit 4 is switched to the second switching state, the switching element 41 is electrically connected to the second ground line 702 and the second frequency modulation element 43, and is grounded via the second frequency modulation element 43. When the frequency switching unit 4 is switched to the first switching state, the frequency switching unit and the antenna unit 3 generate a first resonant frequency together, and the antenna unit 3 is grounded through the first ground line 701 and generates a second resonant frequency. When the frequency switching unit 4 is switched to the second switching state, a third resonant frequency is generated together with the antenna unit 3, and the antenna unit 3 is also grounded through the first ground line 701 to generate a fourth resonant frequency.

Through the circuit design, the multi-frequency antenna device 200 can generate two different resonant frequencies respectively when switched between two switching states, and can perform communication and data transmission at the two resonant frequencies respectively. In practice, the first resonant frequency and the third resonant frequency can be adjusted by changing the capacitance, the inductance and/or the resistance of the frequency modulation elements 42 and 43.

Referring to fig. 18, a ninth embodiment of the multi-frequency antenna device 200 of the present invention is shown, wherein the difference between the ninth embodiment and the eighth embodiment is: the multi-band antenna apparatus 200 further includes a secondary fm unit 6, and the antenna unit 3 is electrically connected to the secondary fm unit 6 via the first ground line 701 and grounded. The secondary frequency modulation unit 6 is mainly composed of passive components such as a capacitor, an inductor and/or a resistor. The second resonance frequency and the fourth resonance frequency can be adjusted by changing the capacitance, inductance and/or resistance of the secondary tuning unit 6.

In summary, the design that the frequency switching unit 4 and the antenna unit 3 generate different resonant frequencies when switched to different switching states enables the multi-frequency antenna apparatus 200 to have a multi-frequency switching function, and can communicate and transmit data with wireless communication apparatuses of various frequencies. Furthermore, the antenna unit 3 can generate two resonant frequencies simultaneously by the change of the structure and circuit design of the antenna unit 3, and the multi-frequency antenna device 200 can switch between different resonant frequencies of the antenna unit 3 at the two resonant frequencies by the arrangement of the frequency switching unit 4, thereby having the function of performing communication and data transmission at multiple frequencies simultaneously. By selecting or changing the capacitance, inductance and/or resistance of the tuning elements 42, 43 and/or the sub-tuning unit 6, the multi-band antenna apparatus 200 can generate a desired resonance frequency. Therefore, the multi-band antenna apparatus 200 is a very innovative, convenient and practical invention.

The above description is only an example of the present invention, but not intended to limit the scope of the present invention, and all simple equivalent changes and modifications made according to the claims and the contents of the patent specification are included in the scope of the present invention.