CN-116207499-B - Self-decoupling intermediate frequency radiation unit and mobile communication antenna

CN116207499BCN 116207499 BCN116207499 BCN 116207499BCN-116207499-B

Abstract

The invention provides a self-decoupling intermediate frequency radiating element and a mobile communication antenna, and relates to the technical field of wireless communication. The self-decoupling intermediate frequency radiation unit comprises a radiation substrate, a dielectric block, two groups of dipoles with orthogonal polarizations and four metal patches. The mobile communication antenna comprises a self-decoupling intermediate frequency radiating element. Each metal patch and each radiation arm of the self-decoupling intermediate frequency radiation unit form a capacitance-inductance resonance circuit, the capacitance-inductance resonance circuit can be added with at least one high-frequency resonance point, the electric performance of the self-decoupling intermediate frequency radiation unit is not affected, and meanwhile, the self-decoupling intermediate frequency radiation unit has the characteristic of transmitting high-frequency electromagnetic waves, so that electromagnetic waves generated by the high-frequency radiation unit which is arranged below the self-decoupling intermediate frequency radiation unit in a nested manner are effectively transmitted, good radiation is generated to the space, the self-decoupling intermediate frequency radiation unit is particularly applied to a mobile communication antenna, an additional decoupling circuit is abandoned, insertion loss is not increased, and the design complexity of the common-caliber antenna and the size of the antenna are reduced.

Inventors

GU XIAOFENG
LU BAOXIANG
SHEN YICHUN
YAN YUJIE
YANG PENGFEI
WANG XUEREN
SHAO CHENG
XIA ZHENGUO
Deng Xitong
DING YIJUN

Assignees

中天通信技术有限公司
中天宽带技术有限公司
江苏中天科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230323

Claims (9)

1. The self-decoupling intermediate frequency radiation unit is characterized by comprising a radiation substrate, a dielectric block, two groups of dipoles with orthogonal polarization and four metal patches; The dielectric block and the two groups of dipoles with orthogonal polarization are respectively arranged at two sides of the radiation substrate, each group of dipoles with orthogonal polarization comprises two oppositely arranged radiation arms, and the radiation arms are closed outer ring circuits; The four metal patches are arranged on the radiation substrate, the four metal patches and the two groups of dipoles with orthogonal polarization are positioned on the same side of the radiation substrate, one metal patch is respectively arranged in each radiation arm, the metal patches are arranged at intervals in the radiation arms, each metal patch and each radiation arm are used for forming a capacitance-inductance resonance circuit, and the capacitance-inductance resonance circuit is used for adding at least one high-frequency resonance point; the dielectric block covers the radiation substrate at the corresponding positions of the four radiation arms; The dielectric block is a dielectric block with high dielectric constant.
2. The self-decoupling intermediate frequency radiating element of claim 1, wherein the metal patch is a polygonal metal patch.
3. The self-decoupling intermediate frequency radiating element of claim 1, further comprising a feed balun connected to the radiating substrate, the feed balun being configured to feed the dipoles in two sets of orthogonal polarizations.
4. A self-decoupling intermediate frequency radiating element as claimed in claim 3, wherein the feed balun comprises a base and two coaxial cables, one ends of the two coaxial cables being connected to the base, the other ends of the two coaxial cables being used to feed the dipoles of the two sets of polarizations that are orthogonal.
5. The self-decoupling intermediate frequency radiating element of claim 4, wherein a first feed and a second feed are provided on the radiating substrate, and two of the coaxial cables are electrically connected to the first feed and the second feed, respectively, the first feed and the second feed being configured to feed the dipoles in two sets of orthogonal polarizations.
6. The self-decoupling intermediate frequency radiating element of claim 5, wherein the second feed has a metallized via for avoiding a short circuit between the first and second feeds.
7. The self-decoupling intermediate frequency radiating element of claim 4, wherein the base is provided with a first securing aperture for securing the base to a reflective plate.
8. The self-decoupling intermediate frequency radiating element of claim 7, wherein the radiating substrate is provided with a second securing aperture for securing the self-decoupling intermediate frequency radiating element to the reflective plate.
9. A mobile communication antenna comprising a reflecting plate, a plurality of high frequency radiating elements and at least one self-decoupling intermediate frequency radiating element as claimed in any one of claims 1 to 8; The high-frequency radiating units and the self-decoupling intermediate-frequency radiating units are arranged on the reflecting plate, the high-frequency radiating units and the self-decoupling intermediate-frequency radiating units are nested and staggered in a common mode, and the self-decoupling intermediate-frequency radiating units are located above the high-frequency radiating units.

Description

Self-decoupling intermediate frequency radiation unit and mobile communication antenna Technical Field The present invention relates to the field of wireless communications technologies, and in particular, to an auto-decoupling intermediate frequency radiating element and a mobile communication antenna. Background With the development of multi-band mobile communication antennas, more and more radiation units are required to be integrated in the multi-band mobile communication antennas. In a mobile communication antenna, there is an unavoidable problem of interference of different frequency coupling. The inter-frequency coupling interference may cause impedance mismatch, degradation of isolation, and pattern distortion. In order to improve the circuit and radiation performance of the mobile communication antenna, an effective decoupling technology is required. In the prior art, a mobile communication antenna comprises one or more intermediate frequency radiating units and a plurality of high frequency radiating units, wherein the intermediate frequency radiating units and the high frequency radiating units are commonly staggered. The mobile communication antenna solves the problem of interference of different frequency coupling by arranging a decoupling circuit. However, the additional decoupling circuit may cause the mobile communication antenna to have problems of increasing design complexity and introducing additional insertion loss. Disclosure of Invention The invention provides a self-decoupling intermediate frequency radiating unit and a mobile communication antenna, which are used for solving the problems that an additional decoupling circuit can cause the mobile communication antenna to have increased design complexity and introduce additional insertion loss. In one aspect, the invention provides an auto-decoupling intermediate frequency radiation unit, which comprises a radiation substrate, a dielectric block, two groups of dipoles with orthogonal polarization and four metal patches; The dielectric block and the two groups of dipoles with orthogonal polarization are respectively arranged at two sides of the radiation substrate, each group of dipoles with orthogonal polarization comprises two oppositely arranged radiation arms, and the radiation arms are closed outer ring circuits; The four metal patches are arranged on the radiation substrate, the four metal patches and the two groups of dipoles with orthogonal polarization are positioned on the same side of the radiation substrate, one metal patch is respectively arranged in each radiation arm, the metal patches are arranged at intervals in the radiation arms, each metal patch and each radiation arm are used for forming a capacitance-inductance resonance circuit, and the capacitance-inductance resonance circuit is used for adding at least one high-frequency resonance point; The dielectric block covers the radiation substrate at the corresponding positions of the four radiation arms. Optionally, the dielectric block is a dielectric block with a high dielectric constant. Optionally, the metal patch is a polygonal metal patch. Optionally, the dipole antenna further comprises a feeding balun, wherein the feeding balun is connected with the radiation substrate and is used for feeding the dipoles with two orthogonal polarization groups. Optionally, the feeding balun includes a base and two coaxial cables, one ends of the two coaxial cables are connected with the base, and the other ends of the two coaxial cables are used for feeding the dipoles with two orthogonal polarization groups. Optionally, a first feeding portion and a second feeding portion are disposed on the radiating substrate, the two coaxial cables are respectively and electrically connected with the first feeding portion and the second feeding portion, and the first feeding portion and the second feeding portion are used for feeding the dipoles with two orthogonal polarizations. Optionally, the second feeding portion has a metallized through hole for avoiding a short circuit between the first feeding portion and the second feeding portion. Optionally, the base is provided with a first fixing hole, and the first fixing hole is used for fixing the base on the reflecting plate. Optionally, the radiation substrate is provided with a second fixing hole, and the second fixing hole is used for fixing the self-decoupling intermediate frequency radiation unit on the reflecting plate. In another aspect, the present invention provides a mobile communication antenna comprising a reflecting plate, a plurality of high frequency radiating elements and at least one self-decoupling intermediate frequency radiating element as described above; The high-frequency radiating units and the self-decoupling intermediate-frequency radiating units are arranged on the reflecting plate, the high-frequency radiating units and the self-decoupling intermediate-frequency radiating units are nested and staggered in a common