EVALUATION OF UHF ANTENNA COUPLERS TYPES CU-691/U AND CU-692/U.
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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Laboratory tests were conducted on UHF Antenna Couplers, Types CU-691U and CU-692U to determine their suitability for FAA use. The CU-691U Coupler was designed for four-channel operation and the CU-692U, two-channel operation. Both systems employed passive networks comprised of tandem coaxial cavities operating as selective filters. These filters, and a suitable matching network combination, were designed to provide the capability of connecting more than one transmitter andor receiver to a single antenna. Measurements were made of such operating parameters as VSWR, selectivity, insertion loss, and isolation. Orbital flight patterns of the antenna radiation, when utilizing the Antenna Coupler, Type CU-691U were also accomplished. Based on the results of the evaluation, it was concluded that the Antenna Couplers, as designed, were suitable for FAA use. It was recommended that the use of these Antenna Couplers be considered in the planning of Remote Communication AirGround Systems. Author
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