In this paper, two G-band sub-harmonic mixers based on planar antiparallel Schottky diodes are presented. The proposed type-I mixer is designed using the conversional THz Schottky diode mixer circuit architecture. In order to broaden the bandwidth further, a novel type-II sub-harmonic mixer based on new circuit topology is proposed. In type-II mixer, an antiparallel Schottky diodes chip is directly connected with metal ground using silver epoxy. The simulated results show that single-sideband (SSB) conversion loss of type-II mixer is less than 10 dB in the frequency range of 160-194.8 GHz. For validation, the type-I mixer is fabricated and tested. Measurement results show that single-sideband conversion loss of type-I mixer is basically less than 10.7 dB in the frequency range of 166-190 GHz.
2. Guo, C., X. Shang, M. J. Lancaster, J. Xu, J. Powell, H. Wang, K. Parow-Souchon, M. Henry, C. Viegas, B. Alderman, and P. G. Huggard, "A 290-310 GHz single sideband mixer with integrated waveguide filters," IEEE Transactions on Terahertz Science and Technology, Vol. 8, No. 4, 446-454, Jul. 2018.
doi:10.1109/TTHZ.2018.2841771
3. Cui, J., Y. Zhang, X. Liu, Y. Li, and C. Wu, "Design of 199 to 238 GHz broadband subharmonic mixer combining two-stage reduced matching technology with Global Design Method," International Journal of Numerical Modelling Electronic Networks Devices and Fields, e2581, 2019.
4. Liu, G., J. Li, H. Xu, X. Zhang, S. Li, and H. Yu, "Design of a 220 GHz subharmonic mixer based on plannar Schottky diode," IEEE Asia Pacific Microwave Conference, 418-421, Kuala Lumpar, Malaysia, Nov. 2017.
5. Zhang, Y., W. Zhao, Y. Wang, T. Ren, and Y. Chen, "A 220 GHz subharmonic mixer based on Schottky diodes with an accurate terahertz diode model," Microwave and Optical Technology Letters, Vol. 58, No. 10, 2311-2316, Mar. 2016.
doi:10.1002/mop.30032
6. Ji, G., D. Zhang, J. Meng, S. Liu, and C. Yao, "A novel 183 GHz solid-state sub-harmonic mixer," Electronics, Vol. 9, No. 1, 186, 2020, https://doi.org/10.3390/electronics9010186.
doi:10.3390/electronics9010186
7. Maestrini, A., B. Thomas, H. Wang, C. Jung, J. Treuttel, Y. Jin, G. Chattopadhyay, I. Mehdi, and G. Beaudin, "Schottky diode-based terahertz frequency multipliers and mixers," Comptes Rendus Physique, Vol. 11, No. 7-8, 480-495, 2010.
doi:10.1016/j.crhy.2010.05.002
8. Yao, C., Z. Chen, J. Ge, M. Zhou, and X. Wei, "A compact 220 GHz heterodyne receiver module with planar Schottky diodes," AEU --- International Journal of Electronics and Comunications, Vol. 84, 153-161, 2018.
doi:10.1016/j.aeue.2017.11.027
9. Shi, M., M. Yu, G. Li, and M. Wang, "A THz fourth-harmonic conversion system expanding microwave to THz band," Infrared Physics and Technology, Vol. 107, 103217, 2020.
doi:10.1016/j.infrared.2020.103217
10. Yang, Y. L., B. Zhang, D.-F. Ji, Y.-W. Wang, X.-Y. Zhao, and Y. Fan, "A wideband terahertz planar Schottky diode fourth-harmonic mixer with low LO power requirement," Journal of Infrared, Millimeter and Terahertz Waves, Vol. 39, No. 5, 540-546, 2020.
11. Maestrojuan, I., I. Ederra, and R. Gonzalo, "Fourth-harmonic schottky diode mixer development at sub-millimeter frequencies," IEEE Transactions on Terahertz Science and Technology, Vol. 5, No. 3, 518-520, 2015.
doi:10.1109/TTHZ.2015.2407862
12. Shen, S., M. Yu, S. Zhang, X. Zhang, and J. Xu, "An equivalent-circuit model of planar GaAs schottky diode for terahertz application," The 10th International Conference on Communications, Circuits and Systems, 34-37, 2018.
13. Wang, C., Y. He, B. Lu, J. Jiang, L. Miao, X.-J. Deng, Y. Xiong, and J. Zhang, "Robust sub-harmonic mixer at 340 GHz using intrinsic resonances of hammer-head filter and improved diode model," Journal of Infrared, Millimeter, and Terahz Waves, Vol. 38, No. 1, 1397-1415, 2017.
doi:10.1007/s10762-017-0436-4
14. Liu, X., Y. Zhang, H. Wang, L. Qi, B. Wang, J. Zhou, W. Ding, Z. Jin, and F. Xiao, "TSPEM parameter extraction method and its applications in the modeling of planar schottky diode in THz band," Electronics, Vol. 10, 1540, 2021, https://doi.org/10.3390/electronics 10131540.
doi:10.3390/electronics10131540
15. Tang, A. Y., V. Drakinskiy, K. Yhland, J. Stenarson, T. Bryllert, and J. Stake, "Analytical extraction of a schottky diode model from broadband S-Parameters," IEEE Transactions on Microwave Theory and Techniques, Vol. 61, No. 5, 1870-1878, 2013.
doi:10.1109/TMTT.2013.2251655
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