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Waveguide VCO using GaAs Gunn diode for FMCW radar at 94 ㎓
Jin-Ho Kim,Dong-Sik Ko,Yong-Hyun Baek,Sang-Jin Lee,Seok-Gyu Choi,Min Han,Tea-Jong Beak,Yeon-Sik Chae,Jin-Koo Rhee 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
In this paper, a 94 ㎓ waveguide voltage controlled oscillator (VCO) is designed and fabricated. We fabricated the waveguide VCO, which has a good linearity, low phase noise and high output power. The oscillating frequency is tuned by resonant disc and output power is optimized by back-short. A cavity, bias posts and a magic tee are designed to get good performances. The bandwidth is 1.015 ㎓ from 93.865 to 94.880 ㎓ and output power is from 11.15 to 12.46 ㏈m. It has 0.91 % of linearity in 415 ㎒ from 93.910 to 94.325 ㎓. Phase noise is -102.82 ㏈c/㏈ at 1 ㎒ offset.