Patent ID: 6677883
Filing Date: 2004-01-13
Classification: G01S

Abstract:
A spectrum analyzer, comprising:a mixer adopted to receive an input signal; a dual frequency fast chirp, slow chirp generator coupled to said mixer; a fast dispersive delay line having an input coupled to the output of said mixer, the output thereof providing a number of coarse frequency bins; a gate coupled to the output of said fast dispersive delay line; a timing pulse applied to said gate to clock said gate at a rate to isolate one of said bins; a band pass filter coupled to the output of said gate for filtering out fast chirp components at the output thereof; and a slow dispersive delay line coupled to the output of said band pass filter, said dual chirps matched respectively to said two dispersive delay lines, whereby the resolution of said spectrum analyzer is that associated with a double Fast Fourier Transform of said input signal.