引言早在1948年Torrey与Whitmer已讨论了微波混频器中镜频端接阻抗对变频损耗的影响。此后一些作者陆续对混频器中镜频、和频以及其余各高次谐波提供电抗性终端以实现能量回收、降低变频损耗的理论进行了研究。截至目前对镜频回收的具体电路技术研究也较多。随着混频二极管性能的不断提高,这类技术乃有可能付诸实现。 INTRODUCTION As early as 1948, Torrey and Whitmer discussed the effect of the mirror frequency termination impedance on the conversion loss in microwave mixers. Since then, some authors have successively studied the theory of providing reactive terminals in the frequency, frequency, and other harmonics in the mixer to achieve energy recovery and reduce the frequency conversion loss. As of now, the recovery of the specific frequency circuit technology research are more. As mixing diodes continue to improve in performance, such technologies are likely to come to fruition.