This thesis uses several simulation programs to calculate the start-oscillation current of possible oscillation modes of a TE01(1) gyro-TWA, and proposes a design utilizing the distributed loss section to suppress possible self-oscillations, achieving high gain near 94 GHz. A 93.6 GHz gyro-TWA operating by TE01(1) is designed. The peak power is 52.4 kW, when the input power is 0.792 mW, with a gain of 78 dB.