在小型调频发射机中,调频与稳频历来是难以解决的矛盾,而笔者用混频法较好地解决了这一问题。经过一年多的考核,证明该机确实性能良好,工作稳定可靠。本文通过对几种常用调频方案的比较,说明采用混频法的缘由,并论证了它的稳频机理。最后,输出了测试结果。 In the small FM transmitter, FM and frequency stabilization has always been difficult to solve the contradiction, and I use the mixing method to better solve this problem. After more than a year of assessment to prove that the aircraft is indeed good performance, work stable and reliable. In this paper, the comparison of several commonly used frequency modulation schemes shows the reason of adopting the frequency mixing method and demonstrates its frequency stabilization mechanism. Finally, the test results are output.