Application of Defected Ground Structure to Suppress Out-of-Band Harmonics for WLAN Microstrip Antenna

International Journal of Microwave Science and Technology Pub Date : 2015-12-27 DOI:10.1155/2015/210608

P. Prajapati

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引用次数: 20

Abstract

An application of defected ground structure (DGS) to reduce out-of-band harmonics has been presented. A compact, proximity feed fractal slotted microstrip antenna for wireless local area network (WLAN) applications has been designed. The proposed 3rd iteration reduces antenna size by as compared to rectangular conventional antenna and by introducing H shape DGS, the size of an antenna is further reduced by . The DGS introduces stop band characteristics and suppresses higher harmonics, which are out of the band generated by 1st, 2nd, and 3rd iterations. H shape DGS is etched below the 50 Ω feed line and transmission coefficient parameters are obtained by CST Microwave Studio software. The values of equivalent and model have been extracted using a trial version of the diplexer filter design software. The stop band characteristic of the equivalent model also has been simulated by the Advance Digital System software, which gives almost the same response as compared to the simulation of CST Microwave Studio V. 12. The proposed antenna operates from 2.4 GHz to 2.49 GHz, which covers WLAN band and has a gain of 4.46 dB at 2.45 GHz resonance frequency.

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应用缺陷接地结构抑制 WLAN 微带天线的带外谐波

本文介绍了如何应用缺陷接地结构（DGS）来减少带外谐波。设计了一种用于无线局域网（WLAN）应用的紧凑型近距离馈电分形开槽微带天线。与矩形传统天线相比，所提出的第 3 次迭代可将天线尺寸减小，而通过引入 H 形 DGS，天线尺寸可进一步减小。DGS 引入了停带特性，抑制了高次谐波，这些谐波超出了第 1、2 和 3 次迭代产生的频带。在 50 Ω 馈线下方蚀刻了 H 形 DGS，并通过 CST Microwave Studio 软件获得了传输系数参数。等效值和模型值是通过双工器滤波器设计软件的试用版提取的。等效模型的阻带特性也通过 Advance Digital System 软件进行了仿真，与 CST Microwave Studio V. 12 的仿真结果相比，其响应几乎相同。拟议的天线工作频率为 2.4 GHz 至 2.49 GHz，涵盖 WLAN 频段，在 2.45 GHz 谐振频率下的增益为 4.46 dB。

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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International Journal of Microwave Science and Technology

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