In view of parasitic passband in the filtering networks composed of distributed elements, a novel circuit of microstrip bandpass filters is presented in this paper.
针对分布参数滤波网络存在寄生通带问题，本文提出一种新的微带带通滤波电路。
This paper presents a simple tracking filter circuit, which is applicable to Doppler radar sets and consists mainly of a switched bandpass filter and a phase-locked loop.
本文提出一种简单的跟踪滤波器电路，该电路可用于多普勒雷达，主要由开关式带通滤波器和锁相环组成。
A frequency translation circuit (172-188) abuts the multiple channel bandpass filtered analogue signals in the frequency domain without any guard bands between adjacent channel signals.
频率平移电路(172 ~ 188)使得经过带通滤波的若干多通道模拟信号在频域中接邻，而在相邻通道信号之间没有任何保护频带。
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