Dual-Polarized Dual-Loop Double-Slot Antipodal Tapered Slot Antenna for Ultra-Wideband Radar Applications

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ID: 271256
2021
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Abstract
The miniaturized high-gain antenna is required in portable, ultra-wideband radar systems. However, the miniaturization, ultra-wideband and high gain often restrict each other in the antenna design. In this paper, a dual-polarized, double-slot, antipodal tapered slot antenna with a double-layer, dual-loop structure and novel slot edges is presented. The proposed magnetic dual-loop structure has the capacity to reduce the low cut-off frequency of the double-slot tapered slot antenna by weakening the resonance and coupling. In addition, the high gain, low sidelobe level (SLL), and low cross-polarization level are achieved in the boresight direction. A novel gradient slot profile is designed to improve the low-frequency directivity of the tapered slot antenna without affecting the matching. To feed the antenna elements, a kind of wideband, balun-divider structure is designed. The dual-polarized antenna is combined by two orthogonal elements in a cross configuration without galvanic contact or influence to performance. The measured results show that the impedance bandwidth of the proposed antenna is 0.6~4 GHz, and the maximum gain is 11 dBi. The isolation between the two antenna ports is better than 32 dB, and the cross-polarization discrimination (XPD) is better than 20 dB.
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yang2021electronicsdual-polarized Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Guangyao Yang;Shengbo Ye;Feng Zhang;Yicai Ji;Xiaojuan Zhang;Guangyou Fang;Yang, Guangyao;Ye, Shengbo;Zhang, Feng;Ji, Yicai;Zhang, Xiaojuan;Fang, Guangyou;
Journal Electronics
Year 2021
DOI
10.3390/electronics10121377
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