Dual-Band Circularly Polarised Asymmetric Linear-Tapered Horn Antenna for Feeder of Synthetic Aperture Radar Onboard Microsatellite

IF 1.1 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-02 DOI:10.1049/mia2.70006

Derry Permana Yusuf, Josaphat Tetuko Sri Sumantyo, Yuki Yoshimoto, Steven Gao, Koichi Ito

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Abstract

This paper presents a novel dual-band waveguide-fed circularly polarised (CP) horn antenna for the feeder of synthetic aperture radar (SAR) onboard microsatellite. The proposed horn antenna consists of an asymmetric linearly tapered slot and a waveguide feed. The C-/X-band left-hand circular polarisation (LHCP) design was simulated, and the 3D-printed prototype was fabricated to validate the simulation and measured in an anechoic chamber. The measured circularly polarised (CP) antenna can achieve dual-band operations with a 3 dB axial ratio bandwidth of 40% (5–6.5 GHz; 8.5–10 GHz), VSWR less than 1.4 in the operating band and a peak gain of 13.6 dBic (5.3 GHz) and 18.5 dBic (9.4 GHz). The measured half-power beamwidth (HPBW) at C-band and X-band frequencies in the xz-plane and yz-plane are achieved at 26°/37° and 18°/23°, respectively. The proposed antenna offers several advantages over current CP antenna designs, including simpler design, low-cost manufacturing, better impedance matching, wider AR bandwidth and lower sidelobe levels.

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用于微卫星合成孔径雷达馈线的双频圆极化非对称线锥喇叭天线

提出了一种新型双频波导馈电圆极化喇叭天线，用于微卫星合成孔径雷达馈线。所提出的喇叭天线由非对称线性锥形槽和波导馈电组成。模拟了C / x波段左圆偏振（LHCP）设计，并制作了3d打印原型来验证模拟并在消声室中进行了测量。所测圆极化（CP）天线可实现双频工作，3db轴比带宽为40% (5-6.5 GHz；工作频段的驻波比小于1.4，峰值增益分别为13.6 dBic （5.3 GHz）和18.5 dBic （9.4 GHz）。在xz平面和yz平面的c波段和x波段频率分别达到26°/37°和18°/23°的半功率波束宽度（HPBW）。与目前的CP天线设计相比，该天线具有几个优点，包括设计更简单、制造成本更低、阻抗匹配更好、AR带宽更宽、旁瓣电平更低。

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来源期刊

Iet Microwaves Antennas & Propagation 工程技术-电信学

CiteScore

4.30

自引率

5.90%

发文量

109

审稿时长

7 months

期刊介绍： Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf