[18] Po-Han Chiang, Jen-Hao Cheng, Vi-Ching Wu, Chau-Ching Chiong, Wen-De Liu, Guo-Wei
Huang, Tian-Wei Huang, Huei Wang: A 206-220GHz CMOS VCO Using Body-Bias Technique
for Frequency Tuning, 2015 IEEE MTT-S International Microwave Symposium (IMS).

[19] Daekeun Yoon; Jongwon Yun; Jae-Sung Rieh:  A 310–340GHz Coupled-Line
Voltage-Controlled Oscillator Based on 0.25-μm InP HBT Technology, IEEE Transactions on
Terahertz Science and Technology, Year: 2015, Volume: 5, Issue: 4.

[20] Wartenberg, S.A.: Selected topics in RF coplanar probing, IEEE Transactions on
Microwave Theory and Techniques, Year: 2003, Volume: 51, Issue: 4.

[21] Cascade Microtech Probe Selection Guide, www.cascademicrotech.com

[22] Jmicro Technology: Precise, Repeatable RF Measurements, Applying CPW Probes to
Everyday Test Problems, www.jmicrotechnology.com.

[23] Alijabbari, N.; Bauwens, M.F.; Weikle, R.M.: 160 GHz Balanced Frequency Quadruplers
Based on Quasi-Vertical Schottky Varactors Integrated on Micromachined Silicon, IEEE
Transactions on Terahertz Science and Technology, Year: 2014, Volume: 4, Issue: 6.

[24] Radisic, Vesna; Samoska, L.; Deal, W.R.; Mei, X.B.; Yoshida, W.; Liu, P.H.;
Uyeda, J.; Fung, A.; Gaier, T.; Lai, R.: A 330-GHz MMIC oscillator module, 
2008 IEEE MTT-S International Microwave Symposium Digest.

[25] Deal, W.R.; Leong, K.; Radisic, V.; Sarkozy, S.; Gorospe, B.; Lee, J.; Liu, P.H.;
Yoshida, W.; Zhou, J.; Lange, M.; Lai, R.; Mei, X.B.: Low Noise Amplification at
0.67 THz Using 30 nm InP HEMTs, IEEE Microwave and Wireless Components Letters, 
Year: 2011, Volume: 21, Issue: 7.

[26] Eisele, H.; Haddad, G.I.: Two-terminal millimeter-wave sources, IEEE Transactions on
Microwave Theory and Techniques, Year: 1998, Volume: 46, Issue: 6.

[27] Okada, K.; Kasagi, K.; Oshima, N.; Suzuki, S.; Asada, M.: Resonant-Tunneling-Diode
Terahertz Oscillator Using Patch Antenna Integrated on Slot Resonator for Power Radiation,
IEEE Transactions on Terahertz Science and Technology, Year: 2015, Volume: 5, Issue: 4.

[28] Egor Alekseev, Andreas Eisenbach, Dimitris Pavlidis, Seth M. Hubbard, William Sutton:
GaN-based NDR Devices for THz Generation, Work supported by ONR (Contract No.
N00014-92-J-1552) and DARPA/ONR (Contract No. N00014-99-1-0513).

[29] Otsuji, T.; Watanabe, T.; Tombet, S.B.; Suemitsu, T.; Ryzhii, V.; Popov, V.; Knap, W.:
 Terahertz emission and detection using two dimensional plasmons in semiconductor
nano-heterostructures for sensing applications, IEEE SENSORS, 2013.

[30] http://userweb.eng.gla.ac.uk/douglas.paul/QCL.html

[31] Christoph Walther, Milan Fischer, Giacomo Scalari, Romain Terazzi, Nicolas Hoyler,
Jérôme Faist: Quantum cascade lasers operating from 1.2 to 1.6 THz, APPLIED PHYSICS 
LETTERS 91, 131122 (2007).

[32] http://www.rap.riken.jp/en/labs/twrg/tqdrt/index.html

[33] https://www.ist-iphobac.org/download.asp?name=iphobac_public.ppt

[34] Jarrahi, M.: Advanced Photoconductive Terahertz Optoelectronics Based on
Nano-Antennas and Nano-Plasmonic Light Concentrators, IEEE Transactions on Terahertz
Science and Technology, Year: 2015, Volume: 5, Issue: 3.

[35] Leeson, D.B.: A simple model of feedback oscillator noise spectrum,
Proceedings of the IEEE, Year: 1966, Volume: 54, Issue: 2.

[36] https://www.hittite.com/content/documents/data_sheet/hmc702lp6c.pdf