[3] FENG Jian-Xiong, WANG Xue-Gang, XIANG Jing-Cheng.3 Millimeter wave linear frequency modulated source with hign linearity[C], 1998 IEEE radio frequency integrated circuits symposium, IEEE electron devices, IEEE microwave theory and techniques societies, Baltimore, Maryland, USA, 1998, 638-641
[4] KANG B, KWON H J, MHEEN B K, et al. Nonlinearity compensation circuit for voltage-controlled oscillator operating in linear frequency sweep mode[J], IEEE Microwave and Guided Wave Letters, 2000, 10: 537-539