Radio Spectrum Monitoring and Surveillance System in the VHF/UHF Frequency Band

The radio system for very/ultra high frequency (VHF/UHF) spectrum monitoring and signal processing used in direction finding is presented in this paper. This main system function is based on the implementation of 6-channel VHF/UHF radio signal receiver. The multicoupler unit allows selection of the desired signal frequency band for the analysis in the receiver. The system implementation is verified according to the user requirements. Several measured electrical characteristics of multicoupler unit and receiver are presented just to illustrate their possibilities for the full application.