Title

Ka-band Vector Reflectometer Based on Simple Phase-shifter Design

Abstract

An automated handheld simple vector reflectometer design for complex-reflection-coefficient measurements at 35.5 GHz (Ka-band, 26.540 GHz) is presented. The proposed reflectometer is based on a standing-wave voltage measuring device and an electronically controlled and custom-designed millimeter-wave phase shifter. The phase shifter consists of p-i-n diode-loaded subresonant slots cut into the wall of a Ka-band waveguide. This paper describes the design of the phase shifter and the overall reflectometer. A comparison of the measurement results, for several loads, using this reflectometer and an Agilent E8364B performance network analyzer is also presented showing the measurement accuracy of the proposed reflectometer. Finally, the utility of this reflectometer for imaging complex composite structures, incorporating a high-resolution synthetic aperture imaging technique, is also demonstrated.

Department(s)

Electrical and Computer Engineering

Sponsor(s)

United States. Air Force

Keywords and Phrases

Complex Reflection Coefficient; Millimeter Wave; P-I-N Diodes; Subresonant Slots; Waveguide

Library of Congress Subject Headings

Phase shifters
Reflectometer

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.


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