阅读说明：本技术 一种新型陷波天线及无线通信设备 (Novel trapped wave antenna and wireless communication equipment ) 是由 崔悦慧 沈国焰 李融林 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种新型陷波天线及无线通信设备,包括天线辐射单元及背腔单元；所述天线辐射单元包括相互贴合设置的上层介质基板及下层介质基板,所述下层介质基板嵌入背腔单元内,上、下层介质基板之间设置辐射缝隙金属层,所述辐射缝隙金属层设置缝隙辐射结构,所述缝隙辐射结构包括四个结构相同的缝隙结构,四个缝隙结构分别设置在下层介质基板的四个象限内,所述四个缝隙结构在下层介质基板的中心处连通,所述四个缝隙结构的中心位置分别设置爪型滤波缝隙结构。(The invention discloses a novel notch antenna and wireless communication equipment, which comprise an antenna radiation unit and a back cavity unit; the antenna radiation unit comprises an upper medium substrate and a lower medium substrate which are mutually attached, the lower medium substrate is embedded into the back cavity unit, a radiation gap metal layer is arranged between the upper medium substrate and the lower medium substrate, the radiation gap metal layer is provided with a gap radiation structure, the gap radiation structure comprises four gap structures with the same structure, the four gap structures are respectively arranged in four quadrants of the lower medium substrate, the four gap structures are communicated at the center of the lower medium substrate, and the center positions of the four gap structures are respectively provided with a claw-shaped filtering gap structure.)

1. A novel notch antenna is characterized by comprising an antenna radiation unit and a back cavity unit;

the antenna radiation unit comprises an upper medium substrate and a lower medium substrate which are mutually attached, the lower medium substrate is embedded into the back cavity unit, a radiation gap metal layer is arranged between the upper medium substrate and the lower medium substrate, a gap radiation structure is etched on the radiation gap metal layer and comprises four gap structures with the same structure, the four gap structures are respectively arranged in four quadrants of the lower medium substrate, the four gap structures are communicated at the center of the lower medium substrate, and the center positions of the four gap structures are respectively provided with a claw-shaped trap gap structure.

2. The novel notch antenna as claimed in claim 1, wherein said slot structure is a circular arc shaped slot.

3. The novel notch antenna as claimed in claim 2, wherein the claw notch slot structure is located on the middle circular metal sheet of the slot structure, and the claw opening is oriented toward the center of the lower dielectric substrate.

4. The novel notch antenna as claimed in claim 1, wherein the slot radiating structure and the claw-type notch slot structure are each symmetrical about a center point of the lower dielectric substrate.

5. The novel notch antenna as claimed in claim 1, further comprising a differential feed structure disposed on the upper surface of the upper dielectric substrate, wherein the differential feed structure is composed of a first feed line and a second feed line perpendicular to each other, and the perpendicular intersection point of the two feed lines is located at the center point of the upper dielectric substrate.

6. A novel notch antenna as claimed in any one of claims 1 to 5, wherein said cavity unit is a rectangular cavity.

7. The novel notch antenna as claimed in claim 1, wherein said claw notch slot structure is formed by three slots, and the angle between adjacent slots is 45 degrees.

8. The novel notch antenna as claimed in claim 1, wherein the upper dielectric substrate, the radiating slot metal layer and the lower dielectric substrate are coaxially disposed.

9. A wireless communication device comprising a novel notch antenna as claimed in any one of claims 1-8.

Technical Field

The invention relates to the field of mobile communication, in particular to a novel notch antenna and wireless communication equipment.

Background

With the rapid development of wireless communication technology, the requirements for miniaturization, integration and multi-functionalization are put forward for communication systems and communication devices. With the development of chip integration technology, the integration level of active devices is higher and higher, and passive devices become main factors restricting the miniaturization of radio frequency systems. The antenna and the filter are important elements at the front end of the radio frequency, and the antenna is used for realizing the interconversion of data signals and free space electromagnetic waves and completing the function of signal transmission. In order to improve communication quality and reduce signal interference, a filter is usually connected to the rear end of an antenna in a communication system to block signals in frequency bands which are not allowed to pass through in transmission signals and only allow signals in a target frequency band to pass through, so that out-of-band interference signals such as attenuation noise and the like are eliminated, and distortion of the signals are prevented. In a conventional rf front-end system, an antenna and a filter are separately designed, and the antenna and the filter are directly connected, problems of impedance mismatch, poor selectivity at the edge of a pass band of the filter, and poor antenna gain may occur. To solve the above problem, an additional impedance matching network needs to be added between the antenna and the filter to achieve optimal impedance matching, but this also results in an increase in size and loss of the whole rf front end.

In order to meet the demands for multi-functionalization and high performance of communication systems, communication antennas are required to have multi-band/wideband characteristics. At present, in China, a plurality of mobile communication system systems coexist, including a fourth generation communication system (4G/LTE system) and a previous generation communication system, a wide frequency coverage from 1710-2690MHz is formed, meanwhile, an ISM frequency band is opened for industrial, scientific and medical institutions to use, licenses or expenses are not needed when the frequency bands are applied, wherein the 2.4GHz frequency band (2400-2484.5MHz) is an ISM frequency band common to all countries around the world, so a relatively complex electromagnetic environment may exist in daily communication, and signals in the ISM frequency band may have a serious interference effect on mobile communication.

Notch antennas may be used to solve the above problems, and it is considered to form a stop band in the ISM band at the beginning of designing a wideband communication antenna to filter the ISM signal interference. The notch antenna is not simply combined with a broadband communication antenna and a filter, but a filtering structure is used as a part of the antenna, the design freedom degree of the antenna is expanded, and the notch antenna with a filtering function is integrally designed, so that the complexity of a system can be effectively reduced, and the communication quality is optimized. The notch antenna has the capabilities of radiation, impedance matching and filtering, and has a more compact structure, a smaller size and a higher research value.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention mainly aims to provide a novel notch antenna, and the notch antenna is characterized in that on the basis that the antenna covers 1.7GHz-2.7GHz, an ISM (2.4GHz-2.48GHz) frequency band in a frequency band is filtered by adding a notch structure, so that the ISM frequency band is prevented from generating interference on signals in the frequency band.

It is a secondary object of the present invention to provide a wireless communication device.

The invention mainly aims to adopt the following technical scheme:

a novel notch antenna comprises an antenna radiation unit and a back cavity unit; the antenna radiation unit comprises an upper medium substrate and a lower medium substrate which are mutually attached, the lower medium substrate is embedded into the back cavity unit, a radiation gap metal layer is arranged between the upper medium substrate and the lower medium substrate, a gap radiation structure is etched on the radiation gap metal layer and comprises four gap structures with the same structure, the four gap structures are respectively arranged in four quadrants of the lower medium substrate, the four gap structures are communicated at the center of the lower medium substrate, and the center positions of the four gap structures are respectively provided with a claw-shaped trap gap structure.

The gap structure is an arc-shaped gap.

The claw-shaped trap gap structure is positioned on the middle circular metal sheet of the gap structure, and the claw-shaped opening direction faces to the center of the lower-layer dielectric substrate.

The slot radiation structure and the claw-shaped notch slot structure are respectively symmetrical about the center point of the lower-layer dielectric substrate.

Preferably, the antenna further comprises a differential feed structure arranged on the upper surface of the upper-layer dielectric substrate, the differential feed structure is composed of a first feed line and a second feed line which are perpendicular to each other, and a perpendicular intersection point of the two feed lines is located at the center point of the upper-layer dielectric substrate.

The cavity unit is a rectangular cavity.

The claw-shaped notch gap structure is composed of three gaps, and the included angle of the adjacent gaps is 45 degrees.

The upper dielectric substrate, the radiation gap metal layer and the lower dielectric substrate are coaxially arranged.

The invention has the secondary purpose of adopting the following technical scheme:

a wireless communication device includes a novel notch antenna.

The invention has the beneficial effects that:

(1) the bandwidth of the invention covers 1.7GHz-2.7GHz, is suitable for a 2G/3G/LTE (4G) system, and simultaneously filters ISM frequency band and reduces signal interference.

(2) The invention has simple structure and novel structure, and forms a radiation stop band in the ISM frequency band by arranging the trap structure in the plane gap, thereby avoiding the integration of filter branches on a feeder line and avoiding the introduction of a parasitic structure to construct offset current.

(3) The band trap has good band trap effect, forms a stop band with radiation and impedance matching in the ISM frequency band, and effectively reduces the interference of signals in the ISM frequency band.

(4) The invention has completely symmetrical structure and can well realize vertical and horizontal polarization.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is an elevational, cross-sectional view of the present invention;

fig. 4 is an impedance bandwidth of the novel notch filtered antenna of the present invention.

Fig. 5 is the gain of the novel band-notch filter antenna of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.