Equivalent Circuit Analysis for Magnetostatic Wave Devices

Abstract

Magnetostatic wave (MSW) devices are potentially very promising for carrying out signal processing directly at microwave frequencies and are receiving much attention recently. Although development of a general design theory based on an equivalent circuit model is essential to make a significant advance in signal processing capabilities of the MSW devices, relatively few design theories were discussed in the past. In this paper, we extended and improved the general equivalent circuit approach to the magnetostatic wave devices we proposed and discussed earlier. Based on the definitions of the purely magnetostatic terminal parameters and the magnetostatic characterisic impedance, the electro-magnetostatic energy conversion is discussed and the appropriate general equivalent circuit models for the MSW devices are developed. Calculated insertion losses for various MSW devices are in excellent agreement with experimental results.