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应用超导材料中的约氏效应和其它电子隧道现象,在毫米波及其更短波长范围内,现在可研制成一种新型的接收机。此发明表明接收机灵敏度有着显著的改进,并且可用在一宽阔的频段范围内。这类接收机以外差检测方式工作,在100GHz 时,具有其理论噪声温度低达20k。组成该接收机的三种基本部件是:超导体——半导体肖特基二极管混频器;约氏结本地振荡器倍频器;约氏参量放大器。本文讨论了部件、系统设计及其限制因素。
Applying Johns' effect and other electron tunneling phenomena in superconducting materials, it is now possible to develop a new type of receiver in the millimeter wave and its shorter wavelength range. This invention shows a significant improvement in receiver sensitivity and can be used over a wide range of frequency bands. This type of receiver to heterodyne detection work at 100GHz, with its theoretical noise temperature as low as 20k. The three basic components that make up the receiver are: Superconductor - Semiconductor Schottky diode mixer; Yokogawa local oscillator frequency multiplier; Yokogawa's parametric amplifier. This article discusses parts, system design, and their limitations.