Heterodyne Multifrequency Receiver for MST
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.
J. T. Case et al., "Heterodyne Multifrequency Receiver for MST," IEEE Transactions on Instrumentation and Measurement, vol. 63, no. 1, pp. 243-245, Institute of Electrical and Electronics Engineers (IEEE), Jan 2014.
The definitive version is available at http://dx.doi.org/10.1109/TIM.2013.2286651
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)
Article - Journal
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