MINIATURIZED MODE TYPE ISOLATORS EMPLOYING RESISTIVE RESONATOR TERMINATIONS
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2001-Oct-24
Mode type circulators/isolators are formed using a ferrite material which is magnetically biased to form a resonator. To this resonator, matching networks (usually quarter wave impedance transformers) are connected to transform the impedance to a nominal level (usually 50 ohms). To obtain a two-port isolator, the isolation port of the circulator is resistively terminated at the end of the matching network.