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A Defected Ground Structure for TE and TM Coupling Reduction of dual-polarized antenna array

IEEE antennaS AND WIRELESS PROPAGATION LETTERS 2024年第9期23卷 2648-2652页

作者： Li, Meiling Yang, Ting Yang, Xue-Xia Zeng, Dan Yi, Zixuan Shanghai Univ Shanghai Inst Adv Commun & Data Sci Key Lab Specialty Fiber Opt & Opt Access Networks Shanghai 200444 Peoples R China

In this letter, a palisade-type defected ground structure (DGS) is proposed for decoupling a miniaturized low-profile dual-polarized antenna array. The palisade-type DGS loaded between the array elements can achieve both transverse electric (TE) decoupling and transverse magnetic (TM) decoupling simultaneously. The decoupling mechanism is elucidated via analyzing and calculating the equivalent capacitance and inductance values of the parallel resonant circuit of the palisade-type DGS when the antenna array is under TE coupling as well as TM coupling. For verification, a dual-polarized antenna array loaded with palisade-type DGS is designed, whose profile is 0.006 lambda(0) and the center-to-center distance between antenna elements is 0.36 lambda(0) at the working frequency of 8.1 GHz. The coupled current analysis of the array loaded with DGS reveals that the palisade-type DGS has the spatial band-stop characteristic, changing the direction of the partially coupled current and thereby reducing coupling. Consequently, the simulated and measured results indicate that TE coupling and TM coupling are reduced by about 11 dB and 33 dB, respectively.

关键词： antenna arrays Couplings Loaded antennas Microstrip antenna arrays antenna measurements Transmission line antennas Inductance Coupling reduction defected ground structure (DGS) dual-polarized antenna array low profile

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A Millimeter-Wave Wideband dual-polarized antenna array With 3-D-Printed Air-Filled Differential Feeding Cavities

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IEEE TRANSACTIONS ON antennaS AND PROPAGATION 2022年第2期70卷 1020-1032页

作者： Sun, Fanqi Li, Yujian Wang, Junhong Ma, Yuchen Ge, Lei Ai, Bo He, Ruisi Beijing Jiaotong Univ Inst Lightwave Technol Beijing 100044 Peoples R China Beijing Jiaotong Univ Key Lab All Opt Network & Adv Telecommun Network Minist Educ Beijing 100044 Peoples R China China Acad Informat & Commun Technol Mobile Commun Innovat Ctr Beijing 100191 Peoples R China Shenzhen Univ Coll Elect Sci & Technol Shenzhen 518060 Peoples R China Beijing Jiaotong Univ State Key Lab Rail Traff Control & Safety Beijing 100044 Peoples R China Beijing Jiaotong Univ Sch Elect & Informat Engn Beijing 100044 Peoples R China

A millimeter-wave high-gain dual-polarized antenna array with an enhanced bandwidth is presented. An innovative air-filled differential feeding cavity loaded with a short-ended cross-shaped waveguide is investigated to serve as the feed network and the mode splitter simultaneously of the 2 x 2 dual-polarized subarrays. Wideband characteristics and a compact planar size that are desirable for the wideband array design are achieved. Moreover, a wideband dual-polarized waveguidefed magnetoelectric (ME) dipole antenna with a lightweight self-support geometry and wideband H-plane parallel feed networks with modified dual-layered configurations are proposed, which are convenient to connect with the differential feeding cavity directly. With the use of a commercial metallic 3-D printing facility, the proposed radiating elements, feeding cavities, and feed networks can be combined successfully in a whole piece with a lightweight geometry. The printed 8 x 8 array prototype operating in the Ka-band confirms a wide bandwidth of about 30%, a gain of up to 28.5 dBi, and stable unidirectional radiation patterns for the two polarizations. Benefitted from the advantages of the promising wideband dual-polarized radiations and convenience of fabrication, the proposed antenna array would be attractive for millimeter-wave polarization diversity applications.

关键词： 3-D printing millimeter-wave differential feed dual-polarized antenna array magnetoelectric (ME) dipole wideband

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Miniaturized Broadband dual-polarized MIMO antenna array With Stable Radiation Pattern for Base-Station Application

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IEEE TRANSACTIONS ON antennaS AND PROPAGATION 2023年第8期71卷 6688-6697页

作者： Ye, Liang Hua Chen, Gui Run Shi, Xinrong Wu, Rui Li, Jian-Feng Zhang, Xiu Yin Guangdong Univ Technol Sch Phys & Optoelect Engn Guangzhou 510006 Peoples R China Guangdong Univ Technol Sch Electromech Engn State Key Lab Precis Elect Mfg Technol & Equipment Guangzhou 510006 Peoples R China Guangdong Inst Metrol Guangdong Prov Key Lab Modern Geometr & Mech Metro Guangzhou 510405 Peoples R China Guangdong Univ Technol Sch Integrated Circuits Guangzhou 510006 Peoples R China South China Univ Technol Sch Elect & Informat Engn Guangzhou 510641 Peoples R China

A wideband dual-polarized MIMO antenna array having small size and stable radiation performance for base station applications is introduced. The antenna element, which is formed by four folded dipole antennas arranged in a small square aperture, is introduced to obtain excellent impedance matching and steady radiation pattern within a broad bandwidth of 36.7% (0.69-1 GHz) with low profile. Based on the high-performance element, a compact broadband dual-polarized MIMO array for mobile communications is then designed. To stabilize the radiation pattern of the MIMO array, a new method of element-shared scheme and 90 degrees phase compensation is introduced to design the MIMO array to obtain stable half power beamwidth (HPBW) of around 64 degrees for desired 120 degrees sector coverage of cellular mobile communications. A special feed network with good performance is designed to excite the MIMO array. The MIMO array introduces a broad bandwidth of 43.7% (0.68-1.06 GHz) for reflection coefficient <-15 dB, as well as good isolation of more than 25 dB between all the ports. Steady radiation pattern with an HPBW of 64 +/- 7 degrees and low sidelobe level of below -15 dB is observed, which is desirable for modern mobile communications.

关键词： Base station antenna dual-polarized antenna array MIMO array stable radiation pattern

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dual-polarized GPS antenna array algorithm to adaptively mitigate a large number of interference signals

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AEROSPACE SCIENCE AND TECHNOLOGY 2018年第Jul.期78卷 387-396页

作者： Park, Kwansik Lee, Dongkook Seo, Jiwon Yonsei Univ Coll Engn Sch Integrated Technol 85 Songdogwahak Ro Incheon 21983 South Korea Yonsei Univ Yonsei Inst Convergence Technol 85 Songdogwahak Ro Incheon 21983 South Korea Agcy Def Dev Daejeon 34188 South Korea

Intentional or unintentional interference experienced by the Global Positioning System (GPS) is a significant concern for GPS-based critical infrastructures and services including aviation. An effective way to mitigate GPS interference is to utilize a GPS antenna array capable of electronically changing its gain pattern. Although a conventional GPS antenna array consists of single-polarized antenna elements, a dual-polarized antenna array has the potential to mitigate approximately twice the number of interference signals in the spatial domain as a single-polarized array because of the additional degrees of freedom provided. This paper proposes an adaptive beamforming algorithm using a dual-polarized GPS antenna array for mitigation of interference signals with various polarizations. In this paper, a dual polarized antenna element specifically refers to two co-located crossed linearly polarized dipole antennas. The proposed minimum-variance-distortionless-response (MVDR)-based space-time adaptive processing (STAP) method utilizes a novel constraint vector that is specially designed for a dual-polarized GPS array. As the proposed constraint vector considers realistic radiation patterns of the antenna, the performance of the proposed method in terms of the signal-to-interference-plus-noise power ratio (SINR) is noticeably superior to that of previous methods under a representative interference scenario. The performance of the proposed method is compared with three previous methods utilizing dual-polarized antenna arrays. (C) 2018 Elsevier Masson SAS. All rights reserved.

关键词： Global Positioning System (GPS) Interference mitigation dual-polarized antenna array Minimum variance distortionless response (MVDR) beamformer Space-time adaptive processing (STAP)

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Wideband dual Linearly polarized Hollow-Waveguide Septum antenna array for Ku-Band Satellite Communications

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IEEE TRANSACTIONS ON antennaS AND PROPAGATION 2023年第3期71卷 2433-2442页

作者： Lu, Yunlong Shen, Shuhao You, Yang Xu, Jun Huang, Jifu Ningbo Univ Fac Elect Engn & Comp Sci Ningbo 315211 Zhejiang Peoples R China Southeast Univ State Key Lab Millimeter Waves Sch Informat Sci & Engn Nanjing 210096 Peoples R China Southeast Univ Frontiers Sci Ctr Mobile Informat Commun & Secur Nanjing 210096 Peoples R China

This article presents a Ku-band full-corporate-feed dual linearly polarized (LP) hollow-waveguide (HW) septum antenna array. A modified low-profile septum polarizer, worked as the radiating element, is designed to push the radiation nulls out of the desired passband upon odd-mode excitation, which helps to achieve stable and consistent radiation performance for both H-pol and V-pol. Square coaxial lines are employed to realize two sets of full-corporate feeding networks with compact size, enabling close spacing between the two adjacent radiating elements. A magic-T based on the single-ridge waveguide is designed to provide in-phase and out-of-phase responses for the feeding networks so that the dual LPs can be achieved. A prototype covering 10.5-14.5 GHz is designed, fabricated, and measured for demonstration. Experimental results show that more than 17.3 dBi peak gain and better than 79% antenna efficiency for both polarizations are achieved within the desired frequency band. In addition, the antenna is free from grating lobes over the same frequency band.

关键词： dual-polarized antenna array satellite communication (SATCOM) septum polarizer waveguide antenna wideband

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dual-polarized antenna arrays Based on Non-Uniform Partial Reflective Decoupling Layers for Vehicular Base Station Systems

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2024年第3期73卷 3051-3064页

作者： Zhao, Ge Jiang, Jiayue Zhao, Luyu Ping, Zhiquan Huang, Guan-Long Lin, Wei Li, Yingsong Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian 710071 Peoples R China China Res Inst Radio Wave Propagat CRIRP Xinxiang 453000 Peoples R China Foshan Univ Foshan 528011 Peoples R China Hong Kong Polytech Univ Dept Elect & Informat Engn Hong Kong Peoples R China Anhui Univ Sch Elect & Informat Engn Hefei 230093 Peoples R China Xian Lambda Commun Co Ltd Xian 710032 Peoples R China

In this paper, two non-uniform partially reflective decoupling layers (PRDLs) are applied to dual-polarized rectangular antenna arrays. By analyzing the coupled waves of the reference array and the reflected wave introduced by the PRDL, two-layer PRDLs are designed step-by-step. Compared to the array with only one-layer PRDL, the array with two-layer PRDLs can not only suppress various types of couplings but also improve the radiation performance. These PRDLs, which both have high dielectric constants in the two-dimensional plane, are composed of non-uniform artificial unit cells that are capable of reducing the cross-polarization discrimination (XPD) of the antennas while reducing the mutual coupling effectively. Simulated and measured results show that the isolation between antennas can be improved from 12 dB to more than 21 dB in the 1.71-2.2 GHz band, while the reflection coefficient remains below -15 dB. Compared with the reference array with no decoupling measures, the radiation pattern of the proposed array remains stable and the realized gain is increased. The proposed method is quite suitable for decoupling large-scale rectangular 5G MIMO arrays.

关键词： 5G antenna array mutual coupling base station antennas dual-polarized antenna array partially reflective layer

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dual-Layer Superstrate Structure for Decoupling of dual-polarized antenna arrays

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IEEE antennaS AND WIRELESS PROPAGATION LETTERS 2022年第3期21卷 521-525页

作者： Li, Yixin Chu, Qing-Xin South China Univ Technol Sch Elect & Informat Engn Guangzhou 510641 Peoples R China

A new antenna decoupling structure by combining metal and dielectric superstrates is studied in this letter. The decoupling concept is elaborated in a 5-element antenna array. Afterwards, the decoupling performances are validated in a 3 x 3 staggered antenna array. The dielectric superstrate serves as magnitude and phase compensators. It achieves the tradeoff design to simultaneously improve decoupling bandwidth and matching in wideband decoupling issue. The E-plane and H-plane isolations are enhanced by at least 9 dB, reaching > 23 and > 27.2 dB in the operating bandwidth of 3.4-4.2 GHz. The radiation performances are also enhanced through decoupling.

关键词： antenna arrays Couplings Dielectrics Scattering parameters Metals antenna measurements Dipole antennas Base station antenna decoupling dual-polarized antenna array

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Sub-THz U-Slot Coupled Stacked-Patch Radiating Elements for dual-polarized MIMO array antennas 18

Sub-THz U-Slot Coupled Stacked-Patch Radiating Elements for ...

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18th European Conference on antennas and Propagation (EuCAP)

作者： Shepeleva, Elena Vilenskiy, Artem Evtyushkin, Gennadiy Lukyanov, Anton Samsung Res Moscow Russia Chalmers Univ Technol Gothenburg Dept Elect Engn Antenna Grp Gothenburg Sweden

ISBN: (纸本)9788831299091;9798350394436

Several sub-THz (D-band, 136 - 148 GHz) dual-polarized array elements (unit cells, UCs) implemented in a multi-layer PCB technology are investigated in the infinite array environment. The elements are stacked-patch antennas with unbalanced aperture-coupled feeds (U-slots), having a slant 45 deg. polarization. We demonstrate that a baseline half-wavelength cavity-backed UC is capable of achieving <= 3.7 dB scan loss in the 60 deg. conical scan range and (132-149) GHz bandwidth. For the increased UC size, however, active polarization channel isolation drastically degrades and the element experiences scan blindness. To address this problem, a UC modification is introduced that suggests using a single-row mushroom-type electromagnetic band-gap structure along the UC sidewalls. Simulated results evidence the realized UC decoupling and elimination of the scan- blindness anomalies in the full visible scan range, with scan loss <= 4.2 dB in the 55 deg. conical scan range and (136-148) GHz bandwidth.

关键词： dual-polarized antenna array wide-angle beam steering aperture-coupled patch sub-THz array antenna

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A Modified Anti-Jamming Method Using dual-polarized Ellipsoid Minimum Variance Distortionless Response to Predict the Coverage Ratio of Global Positioning System Signal

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IEEE SENSORS JOURNAL 2021年第23期21卷 26839-26847页

作者： Hao, Chuanhui Liu, Yidong Wang, Xiaohui Sun, Xubao Shandong Univ Sci & Technol Coll Elect Engn & Automat Qingdao 266590 Peoples R China Shandong Univ Sci & Technol Coll Elect Engn Qingdao 266590 Peoples R China

The dual-polarized array is considered as one of the key anti-jamming techniques due to twice counts of the jamming signals suppressed relative to a monopolar array. This paper proposes an adaptive anti-jamming dual-polarized ellipsoid minimum variance distortionless response (EMVDR) method to evaluate the carrier-to-noise ratio (Ca/N-0) for global positioning system (GPS) coverage. Firstly in GPS L1 band, the dual-polarized gains obtained by controlled reception pattern antenna (CRPA) array are investigated as the signal model of GPS coverage evaluation. Secondly, a novel EMVDR method based the Hermitian tridiagonal loading technique is proposed to obtain the smooth anti-jamming weight matrix, which is against the system error by using the highpass filtering performance of Hermitian tridiagonal matrix. Finally, Ca/N-0 based the proposed EMVDR is used to evaluate the coverage percentage of the GPS signal, namely Ca/N-0 needs to be beyond a threshold of 28 *** by recovering GPS signal. Through many Monte Carlo simulations, the results indicate that the anti-jamming performance of proposed EMVDR method outperforms the classic minimum variance distortionless response (MVDR) based the space adaptive processing (SAP) and the space time adaptive processing (STAP), and the GPS coverage ratio can keep from 60% to 70% until degrees of freedom (DOFs) are exhausted to zero.

关键词： dual-polarized antenna array controlled reception pattern antennas anti-jamming carrier-to-noise ratio

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