This paper discusses the fundamental principle on designing microwave frequency multiplier, and the method of designing a kind of S-band microwave frequency multiplier.
论述微波倍频器的基本设计原理及一种S波段三倍频电路的设计方法。
Methods By using narrow band spectrum analyses and computer we studied the parameters in 30 patients and 30 normal controls. Results The fundamental frequency and bass were lower in diseased group.
方法应用频谱仪和电子计算机对30例声带无明显病变的室带肥厚者和30例室带声带无明显病变的志愿者，测定基频、低音、音域和频率微扰百分值。
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