Design of a low noise 190-240GHz subharmonic mixer based on 3D geometric modeling of Schottky diodes and CAD load-pull techniques

作者：Chen, Zhe^*; Zhang, Bo; Fan, Yong; Yuan, Ye

来源：IEICE Electronics Express, 2016, 13(16): 20160604.

DOI：10.1587/elex.13.20160604

• Schottky diodes
• 3D model
• CAD load-pull
• subharmonic mixer
• terahertz
• 220 GHz

This paper presents the design of a low noise Schottky-diode 190-240 GHz subharmonic mixer (SHM). The embedding impedance condition for the diodes to yield optimum circuit performance is primarily determined. It is achieved using the computer-aided design (CAD) load-pull techniques by taking into account the high-frequency parasitic effects caused by the diode chip geometry. By knowing this condition, the design procedure of the mixer circuitry is expedited. The design effectiveness of the proposed methodology is experimentally validated by the good agreement between the design predictions and the measured results of the mixer performance. Y-factor measurements show that the mixer exhibits the double side band (DSB) noise temperature lower than 1500K and DSB conversion loss less than 10 dB over the 190-240 GHz frequency range, with the DSB noise temperature and conversion loss at 220GHz of 800K and 7 dB respectively.

• 出版日期2016-8-25
• 单位电子科技大学