MODIFIED DIRECTIONAL WIDE BAND PRINTED MONOPOLE ANTENNA FOR USE IN RADAR AND MICROWAVE IMAGING APPLICATIONS

被引：21

作者：

Golezani, J. J. ^{[1
]}

Abbak, M. ^{[1
]}

Akduman, Ibrahim ^{[1
]}

机构：

[1] Istanbul Tech Univ, Istanbul, Turkey

来源：

PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS | 2012年 / 33卷

关键词：

Directive antennas - Electric impedance - Radar antennas - Microstrip antennas - Bandwidth - Directional patterns (antenna) - Imaging systems - Antenna grounds - Microwave antennas - Slot antennas;

D O I：

10.2528/PIERL12052803

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：

This paper presents a modified design of directional monopole antenna with parabolic-shaped ground plane. To increase the directivity, axis of parabola in the ground plane is rotated 45 degrees (in comparison with the previous antenna) to extend throughout the direction of the substrate's diagonal. Consequently, vertex of the parabola is placed at the optimum point in the corner of the substrate. The aim of this attempt is to design an extended and symmetrical ground plane around the patch, with more clarity, to maximize its capability as a reflector. Directivity is further improved by inserting parabolic-shaped slots at the corners of the ground plane. Simulation and measurements show that the proposed antenna has stable directional radiation pattern and higher gain compared to the previous directional monopole antennas. Impedance bandwidth of the antenna covers the frequency range of 49 GHz. Measured HPBW is among the degrees 5422 between 4 and 9 GHz. Gain and HPBW of the antenna are improved 1.33.1 dB and 515 degrees, respectively among the bandwidth in comparison with previous antenna. Results confirm the good characteristics of the antenna for use in microwave imaging, where high resolution is required.

引用

页码：119 / 129

页数：11

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