Heterodyne Multifrequency Receiver for MST

Abstract

Recently, a real-time and portable 2-D microwave imaging system operating at 24 GHz, incorporating modulation schemes similar to modulated scatterer technique and synthetic aperture radar (SAR) imaging technique, was designed using a heterodyne receiver with superior performance compared with a homodyne receiver. Multifrequency SAR images have the added advantage of providing for: 1) coherent averaging of image data over frequency and hence increasing system signal-to-noise ratio (SNR) and 2) enable volumetric (3-D) image production. This letter describes modifications to this receiver for enabling multifrequency operation through phase uncertainty (PU) analysis. These modifications show significant reduction in PU, thereby allowing the coherent addition of data necessary for SAR image formation with higher overall SNR.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Microwave Real-Time Imaging; Nondestructive Evaluation; Phase Uncertainty (PU); Synthetic Aperture Radar (SAR); Heterodyne Receivers; Microwave Imaging Systems; Multifrequency Operations; Realtime Imaging; SAR Image Formation; Signaltonoise Ratio (SNR); Uncertainty Analysis

International Standard Serial Number (ISSN)

0018-9456

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2014

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