Out-of-plane Fed Elliptical Slot Array for Microwave Imaging

Abstract

In this communication, a new approach for feeding a PIN diode-loaded resonant elliptical slot used in microwave imaging arrays for nondestructive testing applications is considered. The proposed feed is based on coupling the transmitted and received signals into the slot using an out-of-plane (perpendicular) microstrip line. An imaging array prototype with this slot, a 90°-bent microstrip-line feed and a coplanar waveguide (CPW) to microstrip line transition was designed and experimentally validated. The design readily accommodates placement of the switching and PIN diode biasing networks on the feeding plane using CPWs, enabling one-sided imaging measurements. The relevant design steps and imaging results obtained with this prototype, in mono-static and bi-static modes, are presented.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Array; Coplanar Waveguide; Microwave; Modulated Scatterer Technique; Out-Of-Plane Microstrip Feed; Resonant Slot; Sensing; Imaging Systems; Imaging Techniques; Microstrip Lines; Nondestructive Examination; Semiconductor Diodes; Coplanar Waveguides

International Standard Serial Number (ISSN)

0018-926X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Oct 2013

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