[1] Wang Jia-Ying, Zhang Mian-Chen, Zhou Si-Yuan et al. Development and application of terahertz radar technology[J]. Journal of China Academy of Electronic Sciences..

[2] Al-Ogaili F, Shubair R M. Millimeter-wave mobile communications for 5G: Challenges and opportunities[C], 1003-1004(2016).

[3] Rappaport T S, Xing Y, Kanhere O et al. Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond[J]. IEEE Access, 7, 7-78757(2019).

[4] Hwu S U, deSilva K B, Jih C T. Terahertz (THz) wireless systems for space applications[C], 171-175(2013).

[5] Siles J V, Maestrini A, Alderman B et al. A Single-Waveguide In-Phase Power-Combined Frequency Doubler at 190 GHz[J]. IEEE Microwave and wireless components letters, 1-3(2011).

[6] Meng Jin, Zhang De-Hai, Jiang Chang-Hong et al. Develop- ment of 166 GHz high power source based on power synthesis technology[J]. J.Infrared Millim.Waves.

[7] Yao Chang-Fei, Zhou Ming, Luo Yun-Sheng et al. Development of D-Band and G-Band frequency multiply sources with Schottky diodes of NEDI[J]. J. Infrared Millim. Waves.

[8] Paoloni C, Mineo M. Double Corrugated Waveguide for G-band Traveling Wave Tubes[J]. IEEE Transactions on Electron Devices, 61, 4259-4263(2014).

[9] Pan P, Hu Y, Gao M et al. Progress of G band folded waveguide TWT[C](2015).

[10] Chang Shao-Jie, Wu Zhen-Hua, Huang Jie et al. The research progress of vacuum electron device in terahertz band[J]. J.Infrared Millim.Waves.

[11] Radisic V, Scott D W, Cavus A et al. 220-GHz high-Efficiency InP HBT Power Amplifiers[J]. IEEE Transactions on Microwave Theory and Techniques, 62, 3001-3005(2014).

[12] Radisic V, Scott D W, Monier C. 50 mW 220 GHz InP HBT power amplifier MMIC[C](2014).

[13] Kazemi H, Miller D, Mohan A et al. 350 mW G-band medium power amplifier fabricated through a new method of 3D-copper additive manufacturing[C](2015).

[14] Gritters D, Brown K, Ko E. 200-260 GHz solid state amplifier with 700 mW of output power[C](2015).

[15] Rollin J-M, Miller D, Urteaga M et al. A Polystrata® 820 mW G-band Solid State Power Amplifier[C](2015).

[16] Guo Fang-Jing, Wang Wei-Bo, Chen Zhong-Fei et al. Research progress of terahertz solid state amplifier[J]. Application of Electronic Technique..

[17] Zhang Zheng, Jiao Fang, Wu Shao-Bing et al. G-band amplifier based on 50 nm AlN/GaN heterojunction[J]. Re-search & Progress of SSE..

[18] Sun Yan, Cheng Wei, Lu Hai-Yan et al. A 300 GHz InP DHBT Amplifier MMIC[J]. Re-search & Progress of SSE..

[19] Chen Yan, Meng Fan-Zhong, Fang Yuan et al. Design of 220 GHz power amplifier based on 90 nm InP HEMT Process[J]. J. Infrared Millim. Waves.

[20] Gunnarsson S.E, Wadefalk N, Svedin J et al. A 220 GHz Single-Chip Receiver MMIC With Integrated Antenna[J]. IEEE Microwave and wireless components letters, 284-286(2008).

[21] Chao Hai Du, Chang Tsun-Hsu, Pu Kun Liu et al. Design of a W-band Gyro-TWT Amplifier With a Lossy Ceramic-Loaded Circuit[J]. IEEE Transactions on Electron Devices, 60, 2388-2394(2013).

[22] Yan Wei, Fu Peng, Hong Wei et al. Microwave characteristics of bonding interconnection in LTCC microwave multichip modules[J]. Journal of Microwave..