Abstract
A Ka-band high-power protection switch has been developed. Our invented circuit utilized new open/short-stub selectable circuit. By using this configuration, the gate widths of the FETs and the power handling capability at transmitting mode can be independently determined. So the circuit can keep low insertion loss at receiving mode while maintaining high power performance at transmitting mode. To verily this methodology, we have fabricated an MMIC switch, and the circuit has achieved the insertion loss of 2dB, the isolation of 25dB, and the power handling capability of 38dBm at 5% bandwidth of Ka-band.
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