一、前言近年来毫米波技术发展迅速,各种毫米波系统开始研究和使用,随着毫米波系统的技术指标的提高,对毫米波源的要求愈来愈高。本文试图在提高毫米波源的指标上做些探讨。二、设计低相位噪声振荡器的一些原则对于振荡器的短稳指标,通常用频域法来描述,即相位噪声指标。振荡器的相位噪声密度与载波之比由下式给出: I. Introduction In recent years, the rapid development of millimeter-wave technology, a variety of millimeter-wave systems began to study and use, with the millimeter-wave system to improve the technical indicators, the millimeter-wave source requirements are getting higher and higher. This article attempts to improve the indicators of millimeter wave source to do some research. Second, the design of some of the principles of low-phase noise oscillator Oscillator for the short-term stability indicators, usually used to describe the frequency domain, that phase noise indicators. The ratio of oscillator phase noise density to carrier is given by: