A Wideband Phased Array With Broad Scanning Range and Wide-Angle Impedance Matching

Jin, Fu-Long; Ding, Xiao; Cheng, You‐Feng; Wang, Bing‐Zhong; Shao, Wei

doi:10.1109/tap.2020.2982509

Cited by 17 publications

(8 citation statements)

References 32 publications

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“…e radiation patterns of the array can be synthesized from the measured results of each array element, which is calculated by [14]…”

Section: Results Of the Fabricated Arraymentioning

confidence: 99%

Design of an S-Band Phased Array with Modified Dipoles

Xiang

et al. 2021

International Journal of Antennas and Propagation

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A wideband, low cross-polarization, high-gain, and wide-angle scanning antenna array is presented in this paper. The antenna array contains 8 subarrays in the horizontal dimension, and each subarray contains 4 unit cells. A two-side printed dipole with an amendatory equivalent circuit model is adopted, and the metal vias are introduced in the element design to ameliorate the cross-polarization level. A radome, acting as the wide-angle impedance matching layer, is introduced to achieve wide-angle scanning. A prototype of a 4 × 8 array is fabricated and measured. The results show that the operating bandwidth of aperture efficiency (BWAE) above 60% is about 26.7% from 2.6 GHz to 3.4 GHz. The measured scanning loss in the H-plane is 2.7 dB when scanning up to 60° with active voltage standing wave ratio (VSWR) <3, and the gain can achieve 21 dB at 3 GHz with a cross-polarization level below −30 dB at all angles.

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“…e radiation patterns of the array can be synthesized from the measured results of each array element, which is calculated by [14]…”

Section: Results Of the Fabricated Arraymentioning

confidence: 99%

Design of an S-Band Phased Array with Modified Dipoles

Xiang

et al. 2021

International Journal of Antennas and Propagation

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“…To reduce the scan loss, wide beam radiation elements are proposed to construct the phased array. In general, there are three approaches in designing such elements, which are mutual coupling reduction [6][7][8], surface-wave suppression [9][10][11][12] and use of meta-materials [13][14][15][16][17][18][19][20][21]. However, in the above approaches, the average gain contribution from each element will decrease due to a wider beam, which leads to a relative low gain for the entire array.…”

Section: Introductionmentioning

confidence: 99%

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Chu

Shao

Zhu

et al. 2022

IET Microwaves Antenna & Prop

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In order to reduce the scan loss and also obtain higher scanning gain for a phased array, a subarray design is proposed in this study. Different from the prior works, the number of active phase shifters utilised in this topology is identical to its counterpart without subarrays, which makes it more cost-effective. To achieve this valuable characteristic, a reconfigurable beam-former is proposed to enable the radiation pattern of a subarray to be switchable to different modes for different scanning regions. The proposed beamformer is based on substrate-integrated waveguide (SIW) and featured by extremely low-loss, due to its unique working mechanism. For validation, a fully integrated subarray module consisting of a beam-former and two Yagi-Uda antennas is designed and analysed. Furthermore, in order to show the effectiveness, five subarray modules with uniform spacing are utilised to construct a complete prototype operating at 15 GHz. Measurement results of the entire array indicate that the achieved gain is 2~3 dB higher than its counterpart without the subarray, from −45°to +45°in the beam-scanning plane. Meanwhile, the scan loss is decreased from �1.45 dB to smaller than �0.9 dB. Meanwhile, sidelobe levels are also improved for scanning angles between �45°. It should be pointed out that the proposed approach is also applicable to broaden the scanning angle of phased arrays with properly selected antenna elements. Since there is no need to increase the number of active phase shifters, this subarray-based approach can be considered more economic, and is very attractive for a variety of phased array systems.

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“…Large-scale antenna arrays, consisting of numerous antenna elements, are promising candidates for the 5G and future 6G applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. To maintain the performance of large-scale antenna arrays, mutual couplings among antenna elements should be much considered, as poor couplings will seriously deteriorate the antenna performance, such as power amplifier efficiency, active VSWR, channel capacity, radiation efficiency, impedance match, and signal-to-noise ratio [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Decoupling of Dual-Polarized Antenna Arrays Using Non-Resonant Metasurface

Luo

Mei

Zhang

et al. 2022

Sensors

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A non-resonant metasurface (NRMS) concept is reported in this paper to improve the isolation of dual-polarized and wideband large-scale antenna arrays. By properly designing the NRMS, it can perform stable negative permeability and positive permittivity along the tangential direction of the NRMS within a wide band, which can be fully employed to suppress the mutual couplings of large-scale antenna arrays. At the same time, the proposed NRMS can also result in positive permittivity and permeability along the normal direction of the NRMS, which guarantees the free propagation of electromagnetic waves from antenna arrays along the normal direction. For demonstration, a 4×4 dual-polarized antenna array loading with the proposed NRMS is designed to improve the isolations of the antenna array. The simulations demonstrate that the isolations among all ports are over 24 dB from 4.36 to 4.94 GHz, which are experimentally verified by the measured results. Moreover, the radiation patterns of antenna elements are still maintained after leveraging the proposed NRMS. Due to the simple structure of the proposed NRMS, it is very promising to be widely employed for massive MIMO antenna arrays.

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A Wideband Phased Array With Broad Scanning Range and Wide-Angle Impedance Matching

Cited by 17 publications

References 32 publications

Design of an S-Band Phased Array with Modified Dipoles

Design of an S-Band Phased Array with Modified Dipoles

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Decoupling of Dual-Polarized Antenna Arrays Using Non-Resonant Metasurface

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