The performance of the IFM receiver in a dense signal environment

The capabilities of multichannel IFM system for working in dense and complex signal environment have been presented in the paper. The present electromagnetic environment in microwave frequency band is filled by the complex simultaneous or overlapped signals. High performances are required from microwave receivers worked in these difficult conditions. The IFM receiver is possible to fulfill these requirements. The analysis and measurement results for simultaneous signals have been presented in the paper. The measurements for varied frequency and signal power of two simultaneous signals using multichannel IFM receiver was done and measurements results have been presented. The instantaneous frequency measurements for complex signals using dual channel IFM receiver have been done. The measurements results for LFM and FSK signals have been presented in the paper. The frequency measurement errors depend on the structure of the frequency discriminators, especially on the delay line length and microwave detectors parameters.