论文部分内容阅读
几年来,一些国内外厂家都在从事不用深冷技术而使4GHz参放噪声性能达到30～35°K水平的工作。根据我国卫星通讯事业发展的要求,南京固体器件研究所已研制成功固体化的热电致冷恒温的4GH2 35°K参放。这种低噪声放大器与循环致冷的参放比较起来具有体积小、寿命长、维护简便和可靠性高的优点,基本上可以取代深冷参放。新研制的35°K参放的主要特点如下: (1)设计了适于低温工作的高空闲频率的参放座,在结构上考虑了把和频、空闲频率和泵频进行良好的分隔。 (2)采用了多级热电致冷系统及比例控制恒温电路。 (3)研制了工作在-30℃下的四端超低损耗环行器。 (4)采用了动态优值更大的变容二极管。
In recent years, a number of domestic and foreign manufacturers are engaged in the work done without cryogenic technology 4GHz parameter noise performance reached 30 ~ 35 ° K level. According to the requirements of the development of satellite communications in China, Nanjing Institute of Solid State Devices has successfully developed solid-state thermoelectric cooling temperature 4GH2 35 ° K participating. This kind of low noise amplifier has the advantages of small size, long life, easy maintenance and high reliability compared with the parameter of circulating cooling, which can basically replace the cold setting. The main features of the newly developed 35 ° K parameter amplifier are as follows: (1) The design of a high idle frequency reference block suitable for low temperature operation, taking into consideration the structural separation of the sum frequency, idle frequency and pump frequency. (2) Multi-level thermoelectric cooling system and proportional control thermostat circuit are adopted. (3) Developed four-terminal ultra-low loss circulator working at -30 ℃. (4) uses a larger dynamic varactor varactors.