Design of Crossbar Mixer at 94 GHz

This paper presents the design and performance of a 94 GHz crossbar mixer using chip diodes in crossbar configuration. The mixer has been designed in suspended stripline configuration on 2 mil fused quartz substrate. Co-simulation between Agilent Advance Design System (ADS) and CST Microwave studio is used to simulate and optimize the mixer circuit. The conversion loss of this crossbar mixer with ~10 dBm of LO power over RF bandwidth (89 to 93.8 GHz) with LO frequency at 94 GHz has been measured. Measurement results show minimum conversion loss of the order of 8 dB and achieved LO to RF isolation was greater than 26 dB.

NRD波导正交场平衡混频器准周期稳态响应分析

详细研究了毫米波无辐射介质波导正交场单平衡混频器在双频信号激励下的准周期稳态响应。根据NRD波导的模式完备性与正交性原理 ,结合导线天线分析方法和矩量法 ,计算了这种混频器中的一个重要结构———交叉杆金属结构对本振LSE模和入射信号LSM模的扰动作用 ,得到了相应的本振感应电动势和入射信号感应电动势。在此基础上 ,使用基于多维傅立叶变换的交调波平衡法 。