Accession Number : ADD004569

Title :   Wide Operating Frequency Range Transmission Line Discriminator.

Descriptive Note : Patent,


Personal Author(s) : Rast,Gustaf J , Jr ; Barley,Thomas A ; Ashley,James R

Report Date : 11 Jan 1977

Pagination or Media Count : 9

Abstract : A wide operating frequency range transmission line discriminator uses an optimum length transmission line which permits near carrier frequency modulation to be measured on a carrier frequency in a broad range from approximately two megahertz to one gigahertz. A hybrid junction, balanced phase detector, power dividers, attenuators and a variable transmission line coupled with the optimum length transmission line provide a wide frequency range discriminator with only a minimum exchange in selected components being necessary for changes in carrier frequency. This near carrier analyzer operates over the wide frequency range with the only component changes being an input bandpass filter, the optimum length transmission line, and the variable length transmission line used as a variable or adjustable phase shift device. The transmission line sections are easily changed by simply selecting proper line lengths which may be previously established.

Descriptors :   *Patents, *Discriminators, *Phase detectors, *Demodulators, Transmission lines, Broadband, Frequency modulation, Power dividers, Attenuators, Frequency analyzers, Bandpass filters

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE