A high-gain frequency scanning antenna for biological radar system

Kaijun Song, Lele Fang, Yedi Zhou and Yong Fan

Journal of Electromagnetic Waves and Applications, 2025, vol. 39, issue 10, 1199-1214

Abstract: A high-gain frequency-scanning antenna (FSA) for a biological radar system operating at 5.8 GHz is proposed for the first time in this paper. The antenna consists of a plurality of rectangular microstrip patches and serpentine slow wave lines for miniaturization based on the microstrip structure. The serpentine slow wave line is used to change the feeding phase of each radiation element to realize the spatial scanning function of the array antenna. The proposed design has the advantages of high gain, wide scanning range and simple processing. For verification, a FSA range from 5.2–6.1 GHz is designed and fabricated. The test results show that the scanning angle of the antenna ranges from – 40° to 40°, which can realize both positive and negative scanning and the gain changes smoothly. The gain ranges from 10.9 dB to 14.8 dB, and the sidelobe level is low.

Date: 2025
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DOI: 10.1080/09205071.2025.2499847

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