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根据某工程的要求,我们研制了4GC低噪品放。工作频率3.7～4.2GC,采用的微波混合集成电路。四级放大器由两个单元放大器组成。单元放大器制作在30×50×0.8的氧化铝陶瓷基片上。四级放大器的增益为20dB。噪声系数小于5.5dB。一、电路设计要成功地设计出一个性能优良的低噪品放,必须从两方面着眼,一方面选择优越的器件,另一方面是合理的设计。在电路上充分发挥器件的潜在能力,力求噪声性能和增益二者兼顾。
According to the requirements of a project, we developed a 4GC low noise product. Working frequency 3.7 ~ 4.2GC, using the microwave hybrid integrated circuits. A four-stage amplifier consists of two unit amplifiers. The cell amplifier is fabricated on a 30 × 50 × 0.8 alumina ceramic substrate. Four amplifier gain of 20dB. Noise figure is less than 5.5dB. First, the circuit design To successfully design a good low-noise product release, we must focus on two aspects, on the one hand choose superior devices, on the other hand is a reasonable design. In the circuit to give full play to the potential of the device, and strive to both noise performance and gain both.