Design and Simulations of a Novel Ka-Band Isoflux Scanning Phased Array Antenna for GEO Satellites

被引：3

作者：

Cai, Muren ^{[1
,2
]}

Li, Wentao ^{[3
]}

Shi, Xiaowei ^{[3
]}

Zhang, Qiaoshan ^{[2
]}

Liu, Heng ^{[2
]}

Li, Yan ^{[2
]}

Wan, Jixiang ^{[2
]}

Gao, Steven

机构：

[1] Xidian Univ, Xian 710071, Peoples R China

[2] China Acad Space Technol Xian, Xian 710000, Peoples R China

[3] Xidian Univ, Natl Key Lab Antennas & Microwave Technol, Xian 710071, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2024年 / 23卷 / 02期

关键词：

Geostationary Earth orbit (GEO) satellite payloads; isoflux scanning; limited scan; phased array; shared subarray; space loss;

D O I：

10.1109/LAWP.2023.3335370

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, we propose a novel spaceborne isoflux scanning phased array (ISPA) antenna at Ka-band for geostationary Earth orbit satellite communications. The ISPA can adaptively compensate for space loss variation during beam scanning. An innovative method for achieving the isoflux scanning characteristics of ISPA by using shared subarrays with an isoflux beam as equivalent elements has been proposed and verified. Taking the space loss variation law derived from the satellite-ground model as the isoflux beam optimization goal, the challenge associated with subarray beam shaping is mitigated greatly by utilizing a shared subarray architecture with a sharing ratio of 4:1, enhancing the subarray's radiation aperture and element number substantially. The optimization results of the shared subarray by using a weighted alternating reverse projection method are verified in a full-wave simulation in ANSYS Electronics Desktop. Numerical results further demonstrate that the proposed ISPA can adaptively compensate for the inconsistency in satellite communication link variation during beam scanning and exhibits low sidelobes better than -20 dB while effectively suppressing grating lobes.

引用

页码：738 / 742

页数：5

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