Millimeter wave electron spin resonance using quasioptical techniques

We have presented a complete analysis of the Cornell mm-wave spectrometer using quasioptical formalism with sufficient flexibility to predict the performance of a novel reflection spectrometer with variable input coupling and transmit-receive duplexing based on polarization coding and we present a practical realization of these design concepts in Earle et al. (1996b). At every stage we have chosen parameters that correspond to practical performance values and measured response. The treatment given here is self-contained, but the references contain many useful extensions of our results and alternative treatments may deepen the reader's understanding. We have tried, where possible, to take advantage of EPR spectroscopists' knowledge of microwave circuits and analysis. As high-field ESR becomes more common, we predict that analogies from other fields will continue to be a useful method for extending the generality and utility of the method. Implementing the advanced techniques discussed in Sections IX-XI will give significant inprovements in signal-to-noise ratio as we have demonstrated elsewhere (Earle et al., 1996b).