Trident-shaped monopole antenna with p-methoxy-benzylidene-p-n-butyl aniline (MBBA) nematic liquid crystal (NLC) for C- and X-band applications

Zeitschrift für Naturforschung A Pub Date : 2023-07-13 DOI:10.1515/zna-2023-0069

Nagandla Prasad, P. Pardhasaradhi, B. Madhav, Rama Krishna Nanchara Rao Manepalli

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Abstract

Abstract In this research article, a novel MBBA nematic liquid crystal (NLC) based circular trident-shaped antenna is proposed for both C-band and X-band microwave applications. The proposed antenna contains a trident-shaped radiating patch, which is made of copper material, and glass material is utilized as a dielectric substrate for the proposed novel MBBA-based trident shaped antenna. The dielectric substrate contains two glass plates with a thickness of 1 mm each and is separated by an air gap of 0.003 mm to fill MBBA nematic liquid crystal. So, the overall size of the proposed antenna will become 15 × 20 × 2.003 mm3. The dielectric constant of each glass plate is chosen as 5.438. However, the antenna operates at a single frequency band, when MBBA material is not present between the glass plates and produces two distinct resonant frequencies when the air gap between the glass plates is filled with MBBA NLC. Antenna radiation parameters such as gain, radiation efficiency, reflection coefficient, and radiation patterns are compared for both simulation and measurement.

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三叉戟形单极天线，采用对甲氧基苄基-对正丁基苯胺(MBBA)向列液晶(NLC)，适用于C波段和x波段

摘要本文提出了一种新型的基于MBBA向列液晶(NLC)的圆形三叉戟天线，用于c波段和x波段微波应用。天线包含一个三叉戟形辐射贴片，该三叉戟形辐射贴片由铜材料制成，玻璃材料作为介质衬底用于所提出的新型基于mbba的三叉戟形天线。介质衬底包含两块厚度为1 mm的玻璃板，并以0.003 mm的气隙隔开，以填充MBBA向列液晶。因此，拟议天线的总体尺寸将变为15 × 20 × 2.003 mm3。每块玻璃板的介电常数取5.438。然而，当玻璃板之间不存在MBBA材料时，天线工作在单一频段，当玻璃板之间的气隙充满MBBA NLC时，产生两个不同的谐振频率。天线辐射参数如增益、辐射效率、反射系数和辐射方向图进行了仿真和测量比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Zeitschrift für Naturforschung A

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