阅读说明：本技术 外置全向天线及具有该天线的通信设备 (External omnidirectional antenna and communication equipment with same ) 是由 于孙立 罗文皓 于 2021-08-18 设计创作，主要内容包括：本发明涉及天线技术领域,公开了一种外置全向天线及具有该天线的通信设备,能够实现天线水平全向辐射。外置全向天线包括双表面结构的基板,基板上设置有平行双线；连接在平行双线上的第一偶极子阵元,由两个辐射臂组成,其中,一辐射臂设置于基板的上表面左侧,另一辐射臂设置于基板的下表面左侧,两辐射臂具有间距；连接在平行双线上的第二偶极子阵元,由两个辐射臂组成,其中,一辐射臂设置于基板的上表面右侧,另一辐射臂设置于基板的下表面右侧,两辐射臂具有间距；其中,第一偶极子阵元与第二偶极子阵元具有阵元间距；馈电点,设置于第一偶极子阵元与第二偶极子阵元之间的中心位置；匹配单元,设置于平行双线上。(The invention relates to the technical field of antennas, and discloses an external omnidirectional antenna and communication equipment with the same, which can realize horizontal omnidirectional radiation of the antenna. The external omnidirectional antenna comprises a substrate with a double-surface structure, wherein parallel double lines are arranged on the substrate; the first dipole array element is connected to the parallel double lines and consists of two radiation arms, wherein one radiation arm is arranged on the left side of the upper surface of the substrate, the other radiation arm is arranged on the left side of the lower surface of the substrate, and the two radiation arms have a distance; the second dipole array element is connected to the parallel double lines and consists of two radiation arms, wherein one radiation arm is arranged on the right side of the upper surface of the substrate, the other radiation arm is arranged on the right side of the lower surface of the substrate, and the two radiation arms have a distance; the first dipole array element and the second dipole array element have an array element interval; the feeding point is arranged at the central position between the first dipole array element and the second dipole array element; and the matching units are arranged on the parallel double lines.)

1. An external omni directional antenna, comprising:

the substrate is of a double-panel structure, and parallel double lines are arranged on the substrate;

the first dipole array element is connected to the parallel double lines and consists of a first radiation arm and a second radiation arm, wherein the first radiation arm is arranged on the left side of the upper surface of the substrate, the second radiation arm is arranged on the left side of the lower surface of the substrate, and the first radiation arm and the second radiation arm have a first interval;

the second dipole array element is connected to the parallel double lines and consists of a third radiation arm and a fourth radiation arm, wherein the third radiation arm is arranged on the right side of the upper surface of the substrate, the second radiation arm is arranged on the right side of the lower surface of the substrate, and a second distance is formed between the third radiation arm and the fourth radiation arm;

wherein the first dipole array element and the second dipole array element have an array element spacing;

the feeding point is arranged at the central position between the first dipole array element and the second dipole array element;

and the matching unit is arranged on the parallel double lines.

2. The external omni directional antenna according to claim 1, wherein the first radiating arm is composed of three radiating branches;

the second radiation arm consists of three radiation branches;

the third radiation arm consists of three radiation branches;

the fourth radiation arm is composed of three radiation branches.

3. The external omnidirectional antenna as defined in claim 1, wherein the array element spacing is 0.5-1.0 air wavelength of a center frequency point of a low frequency band.

4. The external omni directional antenna according to claim 1, wherein the substrate is made of teflon.

5. The external omni directional antenna according to claim 1, wherein the substrate is a PCB substrate.

6. The external omnidirectional antenna as defined in claim 1, wherein the first spacing is 0.5-3 mm, and the second spacing is 0.5-3 mm.

7. The external omni directional antenna according to any one of claims 1 to 6, wherein the size of the substrate is 128.00 x 11.00 x 0.75 mm.

8. A communication device comprising an external omni directional antenna according to any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of antennas, in particular to an external omnidirectional antenna and communication equipment with the same.

Background

WiFi 6E is also called High-Efficiency Wireless (HEW) standard, is a sixth-generation WiFi technology, 802.11ax Wave1 supports 2.4GHz and 5GHz frequency bands, and is downward compatible with 11 a/b/g/n/ac. The WiFi 6E enables the 5.925GHz to 7.125GHz band on the basis of 802.11ax Wave1 to meet the requirement of the wireless device for higher throughput.

However, the impedance bandwidth of the dipole array adopted by the existing antenna is small, and the bandwidth with the return loss smaller than-10 dB is only about 15% in a 7GHz frequency band, so that the antenna cannot meet the requirements of 5.15-5.85 GHz and 5.925 GHz-7.125 GHz full-frequency band use; in addition, the traditional series-fed dipole array cannot ensure that excitation phases of two dipole array elements are consistent, and a condition of a top lobe or a side lobe is large, so that the main lobe gain is reduced or the main lobe is not on the horizontal plane.

Therefore, at present, there is no external omni-directional antenna suitable for indoor wireless communication equipment with WiFi 6E full frequency band.

Disclosure of Invention

The invention provides an external omnidirectional antenna and communication equipment with the same, wherein return loss of the antenna in the ranges of 2.4-2.5 GHz and 5.15-5.715 GHz is controlled to be less than-10 dB, meanwhile, a center feed mode is adopted, so that excitation phases of two dipole array elements of the antenna are consistent, main lobes of the antenna at each frequency point are positioned on a horizontal plane, and horizontal omnidirectional radiation of the antenna is realized.

In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides an external omnidirectional antenna, including:

the substrate is of a double-panel structure, and parallel double lines are arranged on the substrate;

the first dipole array element is connected to the parallel double lines and consists of a first radiation arm and a second radiation arm, wherein the first radiation arm is arranged on the left side of the upper surface of the substrate, the second radiation arm is arranged on the left side of the lower surface of the substrate, and the first radiation arm and the second radiation arm have a first interval;

the second dipole array element is connected to the parallel double lines and consists of a third radiation arm and a fourth radiation arm, wherein the third radiation arm is arranged on the right side of the upper surface of the substrate, the second radiation arm is arranged on the right side of the lower surface of the substrate, and a second distance is formed between the third radiation arm and the fourth radiation arm;

wherein the first dipole array element and the second dipole array element have an array element spacing;

the feeding point is arranged at the central position between the first dipole array element and the second dipole array element;

and the matching unit is arranged on the parallel double lines.

As a preferred scheme, the first radiation arm is composed of three sections of radiation branches;

the second radiation arm consists of three radiation branches;

the third radiation arm consists of three radiation branches;

the fourth radiation arm is composed of three radiation branches.

As a preferred scheme, the array element spacing is 0.5-1.0 air wavelength of a low-frequency band central frequency point.

Preferably, the substrate is made of polytetrafluoroethylene.

As a preferred scheme, the substrate is a PCB substrate.

As a preferable scheme, the first distance is 0.5-3 mm, and the second distance is 0.5-3 mm.

As a preferred solution, the size of the substrate is 128.00 × 11.00 × 0.75 mm.

In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a communication device, where the communication device includes an external omnidirectional antenna as defined in any one of the first aspect.

Compared with the prior art, the external omnidirectional antenna and the communication equipment with the antenna have the advantages that: the two dipole array elements are connected in parallel, so that the high-gain design of the antenna can be realized on the premise of ensuring the horizontal omnidirectional radiation of the antenna; the broadband matching is carried out through the dipole array elements and the matching units on the parallel double lines, the multi-band work of the antenna can be realized, and the return loss in each band is ensured to be less than-10 db; and the mode of middle feeding is adopted, so that the excitation phases of the two dipole array elements are consistent, the main lobes of the antenna at each frequency point are positioned on the horizontal plane, and the horizontal omnidirectional radiation of the antenna is realized.

Drawings

In order to more clearly illustrate the technical features of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is apparent that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a preferred embodiment of an external omni-directional antenna according to the present invention;

fig. 2 is a schematic return loss diagram of an external omnidirectional antenna provided by the present invention in a 2G frequency band;

fig. 3 is a schematic return loss diagram of an external omnidirectional antenna provided by the present invention in a 5G &6G frequency band;

FIG. 4 shows E-plane and H-plane directional patterns of an external omni-directional antenna provided by the present invention in the range of 2.4 to 2.5 GHz;

FIG. 5 shows E-plane and H-plane directional patterns of an external omni-directional antenna provided by the present invention within a range of 5.15 to 5.85 GHz;

FIG. 6 shows E-plane and H-plane directional patterns of an external omni-directional antenna in the range of 5.925 to 7.125 GHz;

in the figure, 1 is a substrate, 2 is a first dipole array element, 3 is a second dipole array element, 4 is a feeding point, and 5 is a matching unit.

Detailed Description

In order to clearly understand the technical features, objects and effects of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Other embodiments, which can be derived by those skilled in the art from the embodiments of the present invention without inventive step, shall fall within the scope of the present invention.

Fig. 1 is a schematic structural diagram of a preferred embodiment of an external omnidirectional antenna provided in the present invention.

As shown in fig. 1, the external omni directional antenna includes:

the substrate 1 is of a double-panel structure, and parallel double lines are arranged on the substrate 1;

a first dipole array element 2 connected to the parallel double lines, wherein the first dipole array element 2 is composed of a first radiation arm and a second radiation arm, the first radiation arm is disposed on the left side of the upper surface of the substrate 1, the second radiation arm is disposed on the left side of the lower surface of the substrate 1, and the first radiation arm and the second radiation arm have a first Gap 1;

a second dipole array element 3 connected to the parallel double lines, wherein the second dipole array element 3 is composed of a third radiation arm and a fourth radiation arm, the third radiation arm is disposed on the right side of the upper surface of the substrate 1, the second radiation arm is disposed on the right side of the lower surface of the substrate 1, and the third radiation arm and the fourth radiation arm have a second Gap 2;

the first dipole array element 2 and the second dipole array element 3 have an array element spacing L;

a feeding point 4, which is arranged at the center position between the first dipole array element 2 and the second dipole array element 3;

and the matching unit 5 is arranged on the parallel double lines.

Specifically, the substrate of the external omnidirectional antenna is a double-panel structure, and parallel double lines are arranged on the substrate.

The external omnidirectional antenna consists of two dipole array elements which are connected in parallel on two parallel lines. The single dipole array element is composed of two radiation arms, the two radiation arms are respectively arranged on the same side of the upper surface and the lower surface of the substrate, a radiation arm interval is formed between the two radiation arms, namely a first interval Gap1 between the first radiation arm and the second radiation arm and a second interval Gap2 between the third radiation arm and the fourth radiation arm, and an array element interval L is formed between the two dipole array elements.

The feed point is located at the center position between the two dipole array elements. The antenna feed point is located at the center between the two dipole array element intervals, so that the excitation phases of the dipole array elements are consistent, the directional diagrams of the antenna in a wide frequency band are guaranteed to be good in consistency, and the maximum gain surface is located on the horizontal plane.

One or more matching units are further arranged on the parallel double lines and used for adjusting the impedance of the antenna, wherein the matching units are generally arranged at the connection positions of the dipole array elements and the parallel double lines or in the middles of the parallel double lines.

The matching bandwidth of the external omnidirectional antenna is adjusted through the distance between the radiation arms in the single dipole array element, the matching units on the parallel double lines and the distance between the array elements. Meanwhile, the antenna directional diagram can be adjusted by adjusting the array element spacing.

According to the external omnidirectional antenna, the two dipole array elements are connected in parallel, so that the high-gain design of the antenna can be realized on the premise of ensuring the horizontal omnidirectional radiation of the antenna; the broadband matching is carried out through the dipole array elements and the matching units on the parallel double lines, the multi-band work of the antenna can be realized, and the return loss in each band is ensured to be less than-10 db; and the mode of middle feeding is adopted, so that the excitation phases of the two dipole array elements are consistent, the main lobes of the antenna at each frequency point are positioned on the horizontal plane, and the horizontal omnidirectional radiation of the antenna is realized.

In a preferred embodiment, the first radiating arm is composed of three radiating branches;

the second radiation arm consists of three radiation branches;

the third radiation arm consists of three radiation branches;

the fourth radiation arm is composed of three radiation branches.

The length of the three sections of radiation branches is 0.15-0.3 working wavelength of a central frequency point of each frequency band.

In the present embodiment, the arrangement style of the radiation arms is shown in fig. 1, and it can be understood that the arrangement style of the radiation arms may also be modified on the basis of fig. 1, for example, the length positions are exchanged.

In a preferred embodiment, the size of the array element interval is 0.5-1.0 air wavelength of a low-frequency band central frequency point.

In this embodiment, the array element spacing is within the air wavelength of 0.5-1 low-frequency band central frequency point, and the antenna can obtain better array gain addition, and if the array element spacing is too small, the array gain addition cannot be obtained, and if the array element spacing is too large, the side lobe is raised, the main lobe gain is lowered, and better gain addition cannot be obtained.

In a preferred embodiment, the substrate is made of teflon.

In this embodiment, the PTFE (polytetrafluoroethylene) substrate has low loss, and the antenna has relatively low loss in a high frequency band, which is beneficial to improving the gain and efficiency of the antenna. Similar antenna designs can be made on other substrates without regard to antenna losses.

In a preferred embodiment, the substrate is a PCB substrate.

In the embodiment, the substrate is designed by adopting a printed board, so that the structure is simple and the cost is low.

In a preferred embodiment, the first Gap1 is 0.5-3 mm, and the second Gap2 is 0.5-3 mm.

It should be noted that the first Gap1 and the second Gap2 mainly adjust the matching bandwidth of the antenna, and the selection of the Gap is related to the material and thickness of the antenna substrate and the operating frequency of the antenna, and generally ranges from 0.5 mm to 3 mm.

In a preferred embodiment, the size of the substrate is 128.00 × 11.00 × 0.75 mm.

In a preferred embodiment, the width of the matching unit is 1.5-2.5 times of the parallel double lines.

Under the teaching of the present invention, the external omni-directional antenna is also subjected to parameter testing, and the specific results are shown in fig. 2 to 6.

As can be seen from fig. 2 and 3, the return loss of the external omnidirectional antenna is less than-10 dB in the ranges of 2.4-2.5 GHz and 5.15-5.715 GHz, the antenna is well matched, the full-band use requirement of the WIFI 6E protocol is met, and the return loss of the antenna at 5G &6G < -10dB bandwidth is more than 35%.

As can be seen from fig. 4, 5, and 6, when the external omnidirectional antenna is in the range of the operating frequency band of 2.4-2.5 GHz & 5.15-5.85 GHz & 5.925-7.125 GHz, the maximum gain surface of the antenna is on the horizontal plane, and the horizontal directional patterns in the respective frequency bands have small non-circularity, which meets the design expectation of omnidirectional radiation of the antenna. The maximum gain of the 2.4GHz frequency band antenna is 4.20 dBi; the maximum gain of the frequency band of 5.15-5.85 GHz is 6.60 dBi; the maximum gain of 7.32dBi in the frequency band of 5.925 to 7.125GHz meets the design expectation of high gain of the antenna.

Correspondingly, the invention further provides a communication device, which includes the external omnidirectional antenna according to any one of the embodiments.

The communication equipment can be WIFI 6E equipment such as a router and a network card, and meanwhile can be downward compatible with common WIFI equipment.

In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "beneath," and "beneath" a second feature includes the second feature being directly above and obliquely above the first feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different features of the invention. The components and arrangements of the specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be noted that, for those skilled in the art, several equivalent obvious modifications and/or equivalent substitutions can be made without departing from the technical principle of the present invention, and these obvious modifications and/or equivalent substitutions should also be regarded as the scope of the present invention.