摘要
S波段超宽带抗干扰发射信道作为卫星通信系统机载终端的核心设备,其信道的抗干扰能力直接影响着整个系统的性能。通过跳频技术来提升通信系统的抗干扰能力的关键是提高跳频速度和拓展跳频带宽,因此该超宽带信道杂散、增益平坦度以及载波的低相噪、捷变频速度等性能指标的优劣就显得极为重要。本文基于传统通用芯片设计了采用二次变频的宽带收发信道,通过切换混频本振、分段开关滤波、多通道一体化集成设计,实现了超宽带信道低杂散、低相位噪声以及高速换频等关键技术指标,并在实际工程应用上得到了验证。
S-band UWB anti-jamming transceiver channel is the core equipment of airborne terminal of satellite communication system,The anti-interference capability of its channel directly affects the performance of the whole system.The key to improve the anti-interference ability of communication system by means of frequency-hopping technology is to increase the frequency hopping speed and expand the frequency hopping band width.Therefore,the performance indexes of UWB channel,such as spurious,gain flatness,carrier low phase noise,fast frequency conversion speed,are very important.A broadband transceiver channel with secondary frequency conversion is designed based on traditional universal chip.By switching mixing local oscillator,segmented switching filter and multi-channel integration design.The key technical indexes of UWB channel such as low spurious(58 dBc),low phase noise and high speed frequency hopping are realized and it is verified in practical engineering application.
出处
《现代导航》
2022年第5期350-356,378,共8页
Modern Navigation
关键词
超宽带
低杂散
低相噪
捷变频
UWB
Low Spurious
Low Phase Noise
Fast Frequency Conversion
