.400-2700mhz Development Of Broadband Communications Receiver

The electromagnetic environment of the ultra-shortwave and microwave communication deteriorates incessantly nowadays, various military signals as well as civil congest the wireless spectrum, it interferes to receive distant and faint signals severely. Those strong electromagnetic interferences which affect signal's quality saturate or block the RF frontend of receive equipments and produce intermodulation interferences. Thus, it is necessary to adopt high performance receiver to deal with signals which needed to receive, especially uncooperative signals.This paper studies the receive technologies which is used in complex electromagnetic environment and designs reasonable project. The 400~2700MHz wideband communication receiver developed have high linearity, high dynamic range, low noise and low spurious signals . etc characteristics. The whole project and some key technologies are innovative.At first, this paper anslyzes the main technical indexs of the 400~2700MHz wideband communication receiver. Subsequently, the project implementation of key technologies and some questions paid more attention are introduced. Then, the results of the test and simulation are represented. Finally, summarize this paper and expect the perfectness and improvement in the future.