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一、引言无线电工程上离不开各种源。晶振、频率综合器、原子频标就是不同类型的源。随着通信、雷达、卫星、空间技术的飞速发展,对无线电信号极其重要的频率特性一短期频率稳定度(毫秒及秒级频率稳定度)提出了愈来愈高的要求。因而,对短稳比对测试设备的要求则更高了。在通常采用的时域测量方法,即用“误差倍增技术”扩大信号的相位起伏<噪声功率>的“多周期测量法”做成的短稳比对测试设备里,倍频器是关键部件之一。换
I. Introduction Radio engineering can not be separated from a variety of sources. Crystal oscillator, frequency synthesizer, atomic frequency standard is different types of sources. With the rapid development of communications, radar, satellite and space technology, higher and higher requirements are placed on the frequency characteristics of short-term frequency stability (millisecond and second-order frequency stability) of the extremely important radio signals. Therefore, the requirements for short-term stability of the test equipment is even higher. The frequency multiplier is the key component in the commonly used short-term comparisons of time-domain measurement methods, namely “multi-period measurement method” which expands the phase fluctuation of signal by “error multiplication technique” one. change