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Accession Number:
AD0481748
Title:
HIGH-FREQUENCY MEASUREMENT OF RADAR CROSS SECTION USING THE STANDING- WAVE METHOD
Corporate Author:
STANFORD UNIV CA STANFORD ELECTRONICS LABS
Report Date:
1966-03-01
Abstract:
The standing-wave method of measuring radar cross sections has been adapted for use at 26 Mc. A target in the middle of a large flat field was illuminated by a transmitter 300 ft away, and a probe was moved along the transmitter-target line to measure the amplitude and position of the standing wave due to the target. Aluminum dipoles of different lengths were first used as targets, and a correction was applied to the results to take account of any nonuniform illumination of the targets. Both the target cross section and the phase of the scattered radiation varied with the target length in the same way as that predicted from microwave measurements. The results demonstrate the validity of extrapolating microwave measurements to the high-frequency part of the spectrum. Calibration of the system was achieved by using the known cross section of a half-wave dipole. The technique was used to measure cross sections of trees and other objects, and in some cases the effective height of an irregularly shaped tree could be deduced.
Descriptive Note:
Technical rept.
Supplementary Note:
DOI: 10.21236/AD0481748
Pages:
0070
Distribution Statement:
Approved for public release; distribution is unlimited.
Contract Number:
NONR-225(64)
Contract Number 2:
ARPA ORDER-196-65
File Size:
3.52MB
