This letter presents the design of a state-of-the-art 330-GHz subharmonic mixer (SHM) using planar Schottky diodes. Unlike conventional mixers, the embedded impedances of the diode chip are accurately extracted and then used for direct synthesis of the diode’s peripheral circuit to efficiently design SHMs with good performance. Band-stop filters (BSFs) using symmetrical open stubs are adopted to recycle RF and local oscillator (LO) energy while simplifying the circuit. At room temperature, the mixer exhibits a single sideband (SSB) conversion loss (CL) of less than 10 dB from 292 to 356 GHz, with 3 mW of LO power at 164.5 GHz. A minimum SSB CL of 7.5 dB is achieved at 334 GHz. The measured return losses at RF and IF ports are typically better than 14 dB.

中文翻译：

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使用肖特基二极管的高性能 330GHz 分谐波混频器


这封信介绍了使用平面肖特基二极管的最先进的 330 GHz 分谐波混频器 (SHM) 的设计。与传统混频器不同，二极管芯片的嵌入阻抗被精确提取，然后用于直接合成二极管的外围电路，以有效地设计具有良好性能的SHM。采用使用对称开路短截线的带阻滤波器（BSF）来回收射频和本地振荡器（LO）能量，同时简化电路。在室温下，该混频器在 292 至 356 GHz 范围内的单边带 (SSB) 转换损耗 (CL) 小于 10 dB，在 164.5 GHz 范围内的 LO 功率为 3 mW。在 334 GHz 时可实现 7.5 dB 的最小 SSB CL。在 RF 和 IF 端口测得的回波损耗通常优于 14 dB。