The Substrate meterial is domestic RT-Duroid 5880.The mixers with IF amplifier have the DSB noise figure of 5.0dB and 5.3dB respectively.

• 介质材料采用国产的仿RT-Duroid 5880。 经测试两种混频器包括中放在内的DSB噪声系数分别为5.；0dB和5