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Sidelobe level reduction using Teflon for a microwave and millimetre-wave antipodal Vivaldi antenna
IET Microwaves, Antennas & Propagation ( IF 1.7 ) Pub Date : 2020-05-04 , DOI: 10.1049/iet-map.2019.0836
Mahdi Moosazadeh 1
Affiliation  

A new technique for lowering the sidelobe level (SLL) of the microwave and millimetre-wave antipodal Vivaldi antenna (AVA) has been presented in this study. The technique is based on introducing tapered-shape Teflon surrounding AVA to couple energy propagated from the antenna and produce stronger radiation in the end-fire direction and as a result, it offers wideband low SLL. Some features of the presented antenna with the utilised new technique are summarised as follows: high gain in wide bandwidth corrected tilt of beam on E -plane in wide bandwidth and low cross-polarisation level. The presented antenna is fabricated and the magnitude of the reflection coefficient of the fabricated antenna is tested, which is from 3.2–40 GHz with S 11 < −10 dB. It exhibits an average of SLL < −10 dB in E -plane and SLL < −18 dB in H -plane at a wideband of 3.2–40 GHz. Moreover, the lowest E -plane's SLL of −20 dB is achieved over the frequency band of 7–7.5 GHz. The proposed antenna has a small size of 43 (width) × 108 (length) mm 2 . The proposed antenna with the mentioned features becomes an attractive candidate for imaging applications.

中文翻译:

使用聚四氟乙烯在微波和毫米波对映维瓦尔第天线上降低旁瓣电平

这项研究提出了一种降低微波和毫米波对映维瓦尔第天线(AVA)的旁瓣电平(SLL)的新技术。该技术基于引入围绕AVA的锥形特氟龙来耦合从天线传播的能量,并在端射方向上产生更强的辐射,因此,它提供了宽带低SLL。所提出的利用新技术的天线的一些特征总结如下:宽带宽中的高增益校正后的波束倾斜Ë 平面具有宽带宽和低交叉极化水平。制作了所展示的天线,并测试了所制作天线的反射系数的幅度,其反射率为3.2–40 GHz,小号 11 <-10 dB。它的平均SLL <-10 dBË 平面和SLL <−18 dB in H 平面在3.2–40 GHz的宽带上。而且最低Ë 在7–7.5 GHz的频带上,飞机的SLL为−20 dB。所提出的天线具有43(宽度)×108(长度)mm 2的小尺寸 。所提出的具有上述特征的天线成为用于成像应用的有吸引力的候选者。
更新日期:2020-05-04
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