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比相器为差动相干解调器的基本部件,特别是当研究 4S—DCPSK 设备上具有直接将射频解调的解调器时,鉴相器强烈地影响解调器的性能。在这种情况下,对输入功率电平的变化和电路非理想特性所引起的输出电压变化的分析,确定了整个解调器系统的质量好坏,我们研究了单平衡电阻性二极管混频器用作鉴相器的情况,因为他们是普通的微波混频器类型,而这些结果足以代表其它混频器类型。
The phase comparator is an essential part of a differential coherent demodulator, especially when investigating a demodulator with direct RF demodulation on the 4S-DCPSK device, the phase detector strongly influences the demodulator’s performance. In this case, the analysis of the output voltage change caused by the change of the input power level and the non-ideal characteristics of the circuit determines the quality of the entire demodulator system. We have studied the single-balanced resistive diode mixer In the case of phase detectors, because they are common types of microwave mixers, these results are sufficient to represent the other mixer types.