Design and Test of a W-band 100-Watts Extended Interaction Oscillator

This paper introduces the research progress of a W-band Extended Interaction Oscillator (EIO). The EIO is designed to produce a continuous wave power of over 100 Watts at nearby 95GHz operating frequency, and adopts 2 pi operating mode, trapezoidal slow wave structure with 24 periods and a beam-to-tunnel radial fill factor of less than 0.625, whose operating voltage is 11 kV with a beam current of 0.15 A. Then, the first sample tube is manufactured under the condition of low assembly precision recently. The preliminary hot test results show that, the output peak power is more than 30W when the operating frequency is 95.16GHz and the operating voltage is 11.4kV with a beam current of 0.14A, while the beam transmission is similar to 50%. Next, it is necessary to use a more effective method to improve the assembly precision in the process of manufacture.