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MITEQ CPX-J-3164型跟踪下变频器是一种三信道增益和相位跟踪系统。该系统将3933兆赫至3967兆赫范围内的任意2兆赫带宽的信号下变频为70兆赫的信号(见图1),每一路信道的总增益为40分贝,噪声系数为11分贝。每一信道的射频输入端有一个隔离器,以缓冲后续的滤波器,并使得输入系统的驻波比为1.2/1。后续滤波器为六极点0.1分贝切比雪夫设计,对本振抑制为30分贝,对镜象信号抑制为60分贝。系统对本振总抑制约为70分贝(隔离器为20分贝,混频器为20分贝)。混频前置放大器是采用MITEQ设计的集成装配双平衡混频器和
The MITEQ CPX-J-3164 Tracking Downconverter is a three-channel gain and phase tracking system. The system down-converts any 2 MHz bandwidth signal from 3933 MHz to 3967 MHz into a 70 MHz signal (see Figure 1) with a total gain of 40 dB per channel and a noise figure of 11 dB. Each channel has an isolator at the RF input to buffer subsequent filters and to provide a 1.2 / 1 standing-wave ratio for the input system. Follow-up filter for the six-pole 0.1 db Chebyshev design, the local oscillator suppression of 30 dB, the image signal suppression of 60 dB. The total LO suppression of the system is about 70 dB (20 dB for the isolator and 20 dB for the mixer). The mixer preamplifier is an integrated mount double balanced mixer and MITEQ design