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

Muren Cai; Wentao Li; Xiaowei Shi; Qiaoshan Zhang; Heng Liu; Yan Li; Jixiang Wan; Steven Gao

doi:10.1109/LAWP.2023.3335370

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

Muren Cai^*, Wentao Li, Xiaowei Shi, Qiaoshan Zhang, Heng Liu, Yan Li, Jixiang Wan, Steven Gao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	738-742
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	23
Issue number	2
DOIs	https://doi.org/10.1109/LAWP.2023.3335370
Publication status	Published - 1 Feb 2024
Externally published	Yes

Keywords

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

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10.1109/LAWP.2023.3335370

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

abstract = "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{\textquoteright}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.",

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author = "Muren Cai and Wentao Li and Xiaowei Shi and Qiaoshan Zhang and Heng Liu and Yan Li and Jixiang Wan and Steven Gao",

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AU - Cai, Muren

AU - Li, Wentao

AU - Shi, Xiaowei

AU - Zhang, Qiaoshan

AU - Liu, Heng

AU - Li, Yan

AU - Wan, Jixiang

AU - Gao, Steven

PY - 2024/2/1

Y1 - 2024/2/1

N2 - 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.

AB - 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.

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

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