EXTENDED FREQUENCY RANGE COMPONENTS FOR IN-GUIDE SPECTRUM ANALYZER, AN/GPM-59.

The objective of the program was to develop new components for extending the fundamental frequency operating range of the ANGPM-59 In-Guide Spectrum Analyzer between 1.12 GHz and 11 GHz, with capabilities of detecting and measuring spurious signals up to 22 GHz. Through most of the measurement range, continuous spectrum measurements can be performed on any standard waveguide system with a decoupling of any combination of coupler and commutator assembly of less than 40 db for the most part, typically 30 db. Components developed include 1 two high sensitivity, non directional probe couplers 2 a low frequency stripline commutator 3 a high frequency waveguide commutator 4 five pairs of nonlinear tapers and 5 a synchronization power supply. The two couplers, fabricated in WR-975 and WR-284 waveguide, can be used with systems in which the fundamental frequency ranges from 1.12 GHz to 2.6 GHz and from 3.95 GHz to 11 GHz, respectively. The couplers and tapers are designed for use in standard radar systems which may be pressurized up to 30 psi and operated at peak power levels up to 6 megawatts. Limited testing in operational radars showed that the components did not induce arcing. Author