[1] [1] Essen H, Stanko S, Sommer R, et al. A high perfmance 220GHz broadb experimental radar[C]International Conference on Infrared IEEE, 2008.

[2] Krista D, Tero K, Juha M, et al. Mixer-based characterization of millimeter-wave and terahertz single-anode and antiparallel Schottky diodes[J]. IEEE Transactions on Terahertz Science and Technology, 4, 552-559(2014).

[3] Cooper K B, Dengler R J, Lombart N, et al. Penetrating 3-D imaging at 4- and 25-m range using a submillimeter-wave radar[J]. IEEE Transactions on Microwave Theory and Techniques, 56, 2771-2778(2008).

[4] Zhang Y, Zhao W, Wang Y F. A 220 GHz subharmonic mixer based on schottky diodes with an accurate terahertz diode model[J]. Microwave & Optical Technology Letters, 58, 2311-2316(2016).

[5] Jiang L H, Wang W S, Tong H X, et al. Reaserch progress of terahertz imaging in the field of human security[J]. University of Shanghai for Science and Technology, 41, 46-51(2019).

[6] Carlson E R, Schnider M V. Sub-harmonically pumped millimeter wave mixers[J]. IEEE Transactions on Microwave Theory and Techniques, 26, 706-715(1978).

[7] Marvin S, Alderman B. Design of low-cost 183 GHz subharmonic mixer using planer schottky diodes[J]. IEEE Microw Wirel Compon Lett, 15, 865-867(2005).

[8] Min W C, Sun H, Zhang Q L, et al. A high-performance W-band subharmonic mixer based on anti-parallel diode pair[J]. Chinese Journal of Electron Device, 39, 1283-1286(2016).

[9] Liu Ge, Zhang Bo, Zhang Lisen, et al. 0.42 THz subharmonic mixer based on 3D precisely modeled diode[J]. Journal of Infrared and Millimeter Waves, 37, 338-343(2018).

[10] Zhang B, Liu G, Yang X F, et al. Research on the front-end of 380 GHz radiometer[J]. Journal of Microwaves, 31, 26-29(2015).

[11] Zhao X Y, Wang J L, Xing D B, et al. Parameters model of terahertz planar Schottky diode[J]. Infrared and Laser Engineering, 45, 1225004(2016).

[12] He Y, Huang K, Miao L, et al. Design of 250 GHz terahertz sub-harmonic mixer[J]. Journal of Microwaves, S1, 69-72(2015).

[13] [13] Hu H F, Ma X M, Jiang S L, et al. Schottky diode based 220 GHz receivers operating at roomtemperature f passive security scanning[C]44 International Conference on Infrared, Millimeter, Terahertz Waves, 2019.