Microwave YIG Switch for Operation at High-Peak Power Levels.
HARRY DIAMOND LABS ADELPHI MD
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The report describes the design, operation, and test results of a J-band absorption modulator-switch that has a power-handling capability of a few watts CW, 40 kW peak, and a switching time of 0.001 sec. Reciprocal YIG yttrium iron garnet modulators, designed in standard rectangular waveguide and making use of a longitudinal magnetic control field, are generally characterized by a low-insertion loss 0.5 dB, a high isolation 25 dB which is nearly independent of magnetic control field in this OFF state, and a matched input impedance VSWR 1.5 for all values of applied control field. These electrical characteristics are nearly constant over a 20-percent bandwidth. Other characteristics of these microwave switches include small size 1-34 in. long, magnetic control field 50 oersteds Oe, operating temperatures exceeding 100C, and a potential switching-time of less than 1 microsec.
- Electrical and Electronic Equipment