Analysis of intermodulation noise in frequency converters by Volterra series
Abstract
A Volterra series with timevarying kernels is developed to treat intermodulation in frequency converters with one twoterminal nonlinearity. The method gives exact results up to the order calculated for any nonlinearity expressible as a power series, treats frequency dependence in the nonlinearity as well as in the terminations, and leads to a convenient algorithm for computer calculation. A program has been written for the case of an abrupt junction varactor upconverter. Results for the upconverter that might be used for single sideband operation in the common carrier microwave band show that the largest contribution to intermodulation comes from currents which are at the sum and difference frequencies of the input signal, corresponding to currents above the input port in frequency and currents in the bias circuitry.
 Publication:

IEEE Transactions on Microwave Theory Techniques
 Pub Date:
 April 1978
 DOI:
 10.1109/TMTT.1978.1129369
 Bibcode:
 1978ITMTT..26..305S
 Keywords:

 Computer Aided Design;
 Frequency Converters;
 Intermodulation;
 Network Analysis;
 Series (Mathematics);
 Computer Programs;
 Equivalent Circuits;
 Performance Prediction;
 Volterra Equations;
 Electronics and Electrical Engineering