Accession Number : AD0834085

Title :   CONSIDERATIONS IN THE DESIGN OF BROADBAND RADIO-FREQUENCY PHASE SENSORS,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH NJ

Personal Author(s) : Campbell, D. V.

Report Date : APR 1968

Pagination or Media Count : 26

Abstract : A broadband phase sensor whose d-c output signal varies in response to the relative phase between the antenna voltage and current has been developed. The sensor together with a control system may be used to automatically tune the antenna to resonance. The improved sensor is similar to conventional FM discriminators and to general-purpose phase indicators. It produces a d-c output voltage of positive polarity, zero, or negative polarity depending upon whether the antenna impedance is inductive, resistive, or capacitive. The d-c output voltage can be used to activate a control system which automatically establishes antenna resonance at any frequency. Design criteria are given for the choice of the sensor circuitry parameters in order to obtain optimum electrical performance over broad frequency ranges. (Author)

Descriptors :   *TUNING DEVICES), (*PHASE DETECTORS, RADIO EQUIPMENT, BROADBAND, ANTENNAS, DETECTORS, RESONANCE, DISCRIMINATORS, FREQUENCY MODULATION, TRANSFORMERS, VOLTAGE DIVIDERS, CRYSTAL DETECTORS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE