CN-122026073-A - Broadband and dual-frequency vertical polarization omnidirectional high-integration anti-interference antenna for 5G application

CN122026073ACN 122026073 ACN122026073 ACN 122026073ACN-122026073-A

Abstract

The invention relates to a broadband and dual-frequency vertical polarization omnidirectional high-integration anti-interference antenna for 5G application, which belongs to the field of antennas, wherein two antennas comprise two patches, an expanded coaxial cable, two dielectric substrates and a grounding plate, the two dielectric substrates are arranged in a stacked mode, the first patch is positioned on the upper surface of an upper substrate, the second patch and a loading structure thereof are positioned on the upper surface of a lower substrate, the grounding plate is positioned on the lower surface of the lower substrate, and the two antennas are different in the difference of the bottom of the upper substrate and other structural parameters. The broadband anti-interference antenna is characterized in that a cross groove and a radial groove are etched in a first patch, two groups of short circuit through holes are matched for combining multiple modes, and an annular belt connected with the first patch through a metalized through hole is arranged on the bottom surface of an upper substrate. The double-frequency band anti-interference antenna is characterized in that an annular groove is etched in the second patch to separate a low-frequency mode, a third patch is additionally arranged on the bottom surface of the upper substrate, the second patch is reserved with a cross groove, and the sizes and the layout of the two groups of short-circuit through holes are correspondingly adjusted.

Inventors

LI DAJIANG
LIU YAHUI
HU KUNZHI
CHEN SIHONG
CHEN ZHIYUAN
YU YAQING

Assignees

重庆邮电大学

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (10)

1. A broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application is characterized by comprising an upper substrate and a lower substrate which are arranged in parallel and are all round; the upper substrate is provided with a circular first patch on the upper surface, and the lower surface of the upper substrate is provided with an annular belt which is connected with the first patch through a metallized through hole penetrating through the upper substrate and the first patch; The upper surface of the lower substrate is provided with a circular second patch, the circumferential edge of the second patch is etched with a radial groove, and the middle part of the second patch is etched with a cross groove; The lower surface of the lower substrate is provided with a grounding plate, and the second patch is connected with the grounding plate through two groups of through holes penetrating through the grounding plate, the lower substrate and the second patch; The coaxial cable also comprises a coaxial cable, wherein an inner conductor of the coaxial cable penetrates through the lower substrate, the second patch and the upper substrate and is connected to the first patch, and an outer conductor of the coaxial cable is connected to the grounding plate.
2. The broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application of claim 1, wherein the first patch radius is 35.5-36.5 mm, the second patch radius is 34.5-35.5 mm, the thickness of two patches is 0.017mm, the radian of the cross slot is 70-72 degrees, the slot width is 2-2.2mm, the slot distance is 7.3-8.3mm, and the length and width of the middle rectangular slot are 9.7-10.7mm and 0.5-1.5mm respectively.
3. The broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application of claim 1, wherein the two groups of through holes comprise an outer short-circuit through hole and an inner short-circuit through hole, the radius of the outer short-circuit through hole is 0.8-1.2 mm, the number of the outer short-circuit through holes is 16-24, the radius D1 of the inner short-circuit through hole is 1.2-2.2 mm, the number of the inner short-circuit through holes is 2-6, the radian of the radial groove is 3-5 degrees, and the groove width is 3.5-4.5mm.
4. The broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application of claim 1, wherein the upper substrate and the lower substrate are made of Rogers 4350 material and have a thickness of 1.524mm, the annular band and the metalized through holes have a radius from the center of 10.5-11.5mm and 9.5-10.5mm, the diameter and the number of the metalized through holes are 0.8-1.2mm and 2-6, and the width of the annular band is 1.5-2.5mm.
5. The broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application of claim 1, wherein the radius of the inner conductor of the coaxial cable is 0.59-0.69mm, the length H of the inner conductor of the coaxial cable from the lower substrate to the upper substrate is 7.5-8.5mm, the grounding plate is round, the side length is 45-55mm, and the thickness is 0.016-0.018mm.
6. A dual-band vertical polarization omnidirectional high-integration anti-interference antenna for 5G application is characterized by comprising an upper substrate and a lower substrate which are arranged in parallel and are all round; The upper surface of the upper substrate is provided with a round first patch, and the lower surface of the upper substrate is provided with a round third patch; the upper surface of the lower substrate is provided with a round second patch, and a cross groove and a circular groove are etched in the middle of the second patch; The lower surface of the lower substrate is provided with a grounding plate, and the second patch is connected with the grounding plate through two groups of through holes penetrating through the grounding plate, the lower substrate and the second patch; The coaxial cable comprises a lower substrate, a first patch, a second patch, a third patch and an upper substrate, wherein the inner conductor of the coaxial cable penetrates through the lower substrate, the second patch, the third patch and the upper substrate and is connected to the first patch, and the outer conductor of the coaxial cable is connected to the grounding plate.
7. The dual-band vertically polarized omnidirectional high-integration anti-interference antenna for 5G applications of claim 6, wherein the first patch radius is 35.8-36.8 mm, the second patch radius is 33-34 mm, the thickness of both patches is 0.017mm, the radian of the cross slot is 72-74 degrees, the slot width is 2.9-3.1mm, the slot distance is 7.1-8.1mm, the length and width of the middle rectangular slot part are 7.9-8.9mm and 0.5mm respectively, the slot distance of the circular ring is 4mm, and the slot width is 0.1mm.
8. The 5G application-oriented dual-band vertically polarized omnidirectional high-integration anti-interference antenna of claim 6, wherein the two groups of through holes comprise an outer short-circuit through hole and an inner short-circuit through hole, the radius of the outer short-circuit through hole is 0.2-0.8 mm, the number of the outer short-circuit through holes is 16-24, the radius D1 of the inner short-circuit through hole is 1.2-2.2 mm, and the number of the inner short-circuit through holes is 2-6.
9. The 5G application-oriented dual-band vertical polarization omnidirectional high-integration anti-interference antenna is characterized in that the upper substrate and the lower substrate are made of Rogers 4350 material and are 1.524mm thick, the third patch is round, the radius from the center is 10.7-11.7mm, and annular grooves with the width of 0.15mm are etched at the positions 8.7mm from the center.
10. The dual-band vertically polarized omnidirectional high-integration anti-interference antenna for 5G applications of claim 6 wherein said coaxial cable has an inner conductor radius of 0.59-0.69mm, a coaxial cable inner conductor length H from a lower substrate to an upper substrate of 5.5-7.5mm, said ground plate is circular, has a side length of 45-55mm, and has a thickness of 0.016-0.018mm.

Description

Broadband and dual-frequency vertical polarization omnidirectional high-integration anti-interference antenna for 5G application Technical Field The invention belongs to the technical field of antennas, and relates to a broadband and dual-frequency vertical polarization omnidirectional high-integration anti-interference antenna for 5G application. Background In 5G and future communication systems, the need for high integration of rf front ends is increasing. The anti-interference antenna is used as a device integrating the functions of the filter and the antenna, so that the system volume and the insertion loss can be effectively reduced, and the anti-interference antenna becomes a current research hot spot. The existing technical path for realizing the anti-interference antenna mainly faces the inherent contradiction of performance-structure, namely the circuit size is obviously increased by adopting a direct cascading or resonator coupling mode, and the method for generating the anti-interference effect through the self structure (such as etching slots) of the antenna usually comes at the expense of gain and efficiency. In particular, in pursuing high selectivity or broadband characteristics, the existing solutions are forced to introduce multilayer stacks, air cavities or complex three-dimensional feeding structures, which lead to an increase in antenna profile, complex manufacturing process and challenges in reliability, and it is difficult to meet the requirements of modern communication equipment for compactness, low cost and mass production. In typical application scenarios such as indoor wireless coverage, a distributed antenna system, a small base station and the like, the vertical polarization omnidirectional antenna can provide uniform signal coverage on a horizontal azimuth plane, and the polarization direction of the vertical polarization omnidirectional antenna is naturally matched with the built-in antenna of most user terminal equipment, so that the vertical polarization omnidirectional antenna has core value for guaranteeing the quality and stability of a communication link. The design scheme based on the circular patch antenna is a preferred technical route for realizing low-profile and stable omnidirectional radiation by virtue of structural symmetry and inherent TM 0n mode resonance characteristics. Although the academic world has realized the broadband or dual-frequency operation of the antenna through loading technology, parasitic patch and other means, how to efficiently integrate the high-selectivity anti-interference function on the basis is still a prominent technical bottleneck. The prior art scheme is easy to solve, the bandwidth is improved, the selectivity is reduced, the anti-interference characteristic is improved, the gain is reduced or the section is increased, and the three-dimensional scheme such as a dielectric resonator can realize the function, but the processing convenience and the cost advantage of the planar structure are sacrificed. At present, the industry especially lacks a comprehensive solution capable of synchronously deriving high-performance broadband and dual-band anti-interference antennas based on the same compact planar architecture through an extensible and easily-controllable design method. Therefore, an innovative antenna design concept is urgently needed in the field, and a plurality of key problems such as bandwidth expansion, multi-band generation, high selectivity and stable omni-directional radiation can be cooperatively solved under the structural constraint of planarization and low profile, so that a feasible device foundation is provided for the next-generation highly-integrated radio frequency front end. Disclosure of Invention Accordingly, the present invention is directed to a broadband and dual-frequency vertical polarization omnidirectional high-integration anti-interference antenna for 5G applications. In order to achieve the above purpose, the present invention provides the following technical solutions: A broadband vertical polarization omnidirectional high-integration anti-interference antenna for 5G application comprises an upper substrate and a lower substrate which are arranged in parallel and are all round; the upper substrate is provided with a circular first patch on the upper surface, and the lower surface of the upper substrate is provided with an annular belt which is connected with the first patch through a metallized through hole penetrating through the upper substrate and the first patch; The upper surface of the lower substrate is provided with a circular second patch, the circumferential edge of the second patch is etched with a radial groove, and the middle part of the second patch is etched with a cross groove; The lower surface of the lower substrate is provided with a grounding plate, and the second patch is connected with the grounding plate through two groups of through holes penetrating through the grounding plate