Wide-band real-time frequency measurement using compressive receiver

In this paper, real-time microwave frequency measurement is demonstrated using compressive receiver over wide bandwidth. Second order cascaded all-pass networks are employed as dispersive delay networks for group delay dispersion. They offer a high resolution of ±6 ns/GHz over 500 MHz-1 GHz bandwidth. The UHF band is chosen as many radio frequency communication standards operate in the bandwidth. The analytical model of compressive receiver is shown for linear group delay (quadratic phase) response of the dispersive networks. Frequency measurement of ISM, WiMax and low power RFID signals within the bandwidth are demonstrated.