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Monopulse receiverA time division multiplexing and a quadraphase combining dual channel system were analyzed, designed, and tested. Analyses performed include the following: (1) boresight error as a function of the error channel bandwidth; (2) error channel interference with the sum channel functions; (3) threshold performance; and (4) error channel crosstalk, linearity, and drift as a function of signal level, Doppler, and environment. Test results indicate that the time division multiplexing system meets the design goals of the program. However, careful selection and alignment of all gain controlled amplifiers are required along with temperature compensation of the angle channel gain. The quadraphase system crosstalk performance is comparatively poor (-15 dB) with respect to the -30 dB requirements and this consequently affects gain tracking performance. Gain tracking was found to be + or - 20 percent rather than the + or - 5 percent specification. Data for the two systems is compared and recommendations are presented.
Document ID
19770021410
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 3, 2013
Publication Date
April 1, 1977
Subject Category
Communications And Radar
Report/Patent Number
NASA-CR-153910
Report Number: NASA-CR-153910
Accession Number
77N28354
Funding Number(s)
CONTRACT_GRANT: JPL-954588
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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