[1] Cohn M, Degenford J E, Newman B A. Harmonic mixing with an antiparallel diode pair[J]. IEEE Trans. Microwave Theory Tech., 23, 667-673(1975).

[2] Madjar A. A novel general approach for the optimum design of microwave and millimeter wave subharmonic mixers[J]. IEEE Trans. Microwave Theory Tech., 44, 1997-2000(1996).

[3] Yum T Y, Xue Q, Chan C H. Novel subharmonically pumped mixer incorporating dual-band stub and in-line SCMRC[J]. IEEE Trans. Microwave Theory Tech., 51, 2538-2547(2003).

[4] Hettak K, Morin G A, Stubbs M G. A novel miniature multi-layer MMIC CPW single side band CPW mixer for up conversion at 44.5 GHz[J]. IEEE Microwave and Wireless Components Letters, 15, 606-608(2005).

[5] Habibpour O, He Z S, Strupinski W et al. A W-band MMIC Resistive Mixer Based on Epitaxial Graphene FET[J]. IEEE Microwave and Wireless Components Letters, 27, 168-170(2017).

[6] Xu Z, Xu J, Meng H et al. A balanced sub-harmonic mixer for EHF satellite communications[J]. IEICE Electron. Express, 15, 20180931-20180931(2018).

[7] Huang Y J, Lien C H, Wang H et al. A 78-114 GHz monolithic subharmonically pumped GaAs-based HEMT diode mixer[J]. IEEE Microwave and Wireless Components Letters, 12, 209-211(2002).

[8] Su J Y, Meng C, Wu P Y. Q-Band pHEMT and mHEMT Subharmonic Gilbert upconversion mixers[J]. IEEE Microwave and Wireless Components Letters, 19, 392-394(2009).

[9] Chiou H K, Lin J Y. Symmetric offset stack balun in standard 0.13-um CMOS technology for three broadband and low-loss balanced Passive mixer designs[J]. IEEE Trans. Microwave Theory Tech., 59, 1529-1538(2011).

[10] Hung S H, Cheng K W, Wang Y H. Broadband sub-harmonic mixer with a compact band pass filter[C], 4-7(2012).

[11] Chen Z, Zhang B, Fan Y, Yuan Y. Design of a low noise 190-240 GHz subharmonic mixer based on 3D geometric modeling of Schottky diodes and CAD load-pull techniques[J]. IEICE Electron. Express, 13, 20160604(2016).

[12] Xu Z, Qian C, Dou W et al. Design of a W-band sub-harmonic mixer by employing microstrip technology[J]. Journal of Infrared Millimeter Waves, 32, 242-247(2013).

[13] Su C C, Liu C H, Lin C M et al. A 24-44 GHz Broadband Subharmonic Mixer with Novel Isolation-Enhanced Circuit[J]. IEEE Microwave and Wireless Components Letters, 25, 124-126(2015).

[14] Zhang S, Sun L, Wen J et al. A 48 GHz-78 GHz MMIC sub-harmonic pumped image rejection mixer[C], 286-289(2014).

[15] Ma K, Yeo K S. New Ultra-Wide Stopband Low-Pass Filter Using Transformed Radial Stubs[J]. IEEE Trans. Microwave Theory Tech., 59, 604-611(2011).

[16] Hong J S, Lancaster M J[M]. Microstrip Filter for RF/Microwave Applications(2001).