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Microwave interrogation of dielectric targets. Part II: By microwave time delay spectroscopy
Author(s) -
Jacobi John H.,
Larsen Lawrence E.
Publication year - 1978
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594461
Subject(s) - microwave , microwave imaging , chirp , optics , attenuation , multipath propagation , aperture (computer memory) , microwave transmission , synthetic aperture radar , computer science , acoustics , physics , electronic engineering , telecommunications , engineering , channel (broadcasting) , laser , computer vision
A method is described which overcomes the problems of multipath propagation and range ambiguity that is suffered by the single‐frequency continuous‐wave microwave‐imaging system described in part I. This technique is essentially a variation of chirp radar techniques, which have been adapted to time delay and attenuation measurements through a target. The feasibility of discriminating between paths whose differential time delay is on the order of 100 ps is demonstrated. Further, the need for small physical aperture in the transmitting and receiving antennas is demonstrated.