Experiments on a Ku-band gyrotron traveling-wave-tube amplifier with a tapered waveguide
- Resource Type
- Original Paper
- Authors
- Jung, Sang Wook; Lee, Han Seul; Jang, Kwang Ho; Choi, Jin Joo; So, Joon Ho
- Source
- Journal of the Korean Physical Society. September 2015 67(5):854-859
- Subject
- Gyro-TWT
Wide bandwidth
2D PIC code
Ku band
- Language
- English
- ISSN
- 0374-4884
1976-8524
A Ku-band gyrotron traveling-wave-tube (gyro-TWT) amplifier was investigated. To obtain a wide operating bandwidth, we used a two-stage tapered rectangular waveguide interaction circuit. An electron beam of 27 keV and 3.56 A was produced from a double-anode magnetron-injection-gun (MIG). The measured frequency bandwidth over 10 dB gain in the linear operation region was found to be 18%. The gyro-TWT’s saturated output power was 14.9 kW at 14.4 GHz, corresponding to a saturated output power gain of 27.4 dB and an efficiency of 15.5%. The measured experimental results were in agreement with those of non-linear numerical simulations.