3. CP-FTMW frequency-shift keying microwave pulse spectrometer

3.1 Need for change

Acquiring a spectrum across the entire spectral band of a microwave pulse spectrometer using Fourier transform is a lengthy process: scanning the spectrum requires a series of steps in which the cavity is precisely tuned to the resonance frequency, followed by signal recording and then moving the cavity to the next position. This process is automated; nevertheless, the basic design of the spectrometer (mirror movement, synchronization system, acquisition time) results in a significant experiment time.

A new technique using a frequency-shifted microwave pulse, CP (Chirped-Pulse), was developed in 2006 by Brooks H. Pate's group at the University of Virginia