Low-profile dielectric grooved GRIN lens for broadband millimeter-wave applications

被引:1
作者
Dudek, Andrzej [1 ]
Gruszczynski, Slawomir [1 ]
Wincza, Krzysztof [1 ]
机构
[1] AGH Univ Krakow, Inst Elect, Al Adama Mickiewicza 30, PL-30059 Krakow, Poland
关键词
Antennas; Antenna radiation patterns; Broadband antennas; Lenses; Millimeter waves; LUNEBURG LENS; ANTENNA;
D O I
10.1016/j.aeue.2024.155548
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
Microwave lenses are utilized at millimeter waves to ensure high-gain and narrow-beamwidth radiation patterns. This paper proposes full-dielectric grooved graded-index (GRIN) lenses with an improved effective permittivity profile of the lens. The proposed grooved GRIN lenses combine changes in the lens geometry with the stepped effective permittivity profile to better approximate the theoretical permittivity profile of the lens. A prototype GRIN lens has been designed, fabricated, and measured. The designed lens has diameter and thickness equal to 72 mm and 19.04 mm (5.370, 0 , 1.470 0 at the center frequency of 22 GHz), respectively. The lens covers the entire K-band (18-26.5 GHz) with aperture efficiency better than 44%. Moreover, it achieves the maximum gain and aperture efficiency of 23 dBi and 64%, respectively.
引用
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页数:7
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