Peter Vizmuller is president of RHR Laboratories, a developer and marketer of system simulation software. He holds an M.S. in electrical engineering from the University of Toronto. A recipient of the J.E. Reid Memorial prize and a two-time winner of the RF Design magazine design contest, he is the author of RF Design Guide: Systems, Circuits, and Equations and Filters with Helical and Folded Helical Resonators, both published by Artech House.