UV 波段的宽带可重构收发机的实现

设计了一种宽带可重构收发机，主要由三部分组成：发射机、接收机和频率源。发射机完成从中频 70 MHz 到100~550 MHz 的射频发射，为了减小发射信号对相邻信道的干扰，发射信号的杂散抑制要高。接收 机从众多的电波中选出有用信号，并将该信号搬移到中频信号，然后放大到解调器所要求的电平值，将射频信 号变为中频信号，由于传输路径上的损耗和多径效应，接收机接收的信号是微弱且有变化的，并伴随着许多干 扰，这些干扰信号强度往往远大于有用信号，因此接收机的主要指标是灵敏度和选择性。频率源提供精确和低 噪声的本振信号，为射频变频系统核心部分之一，频率源的主要指标是相位噪声。

Implementation of UV-Broadband Reconfigurable Transceiver

A broadband reconfigurable Transceiver is designed which is mainly composed of three parts: transmitter ,receiver and frequency source. The transmitter completes the 70MHz IF signal moving to the required 100MHz- 550MHz band and has sufficient transmitting power.In order to reduce the interference of transmitted signals to adjacent channels, the spurious suppression of transmitting signal is higher. Receiver completes the selection of useful signals from numerous radio waves and moves the signals to intermediate frequency signals, and then amplify it to the level required by the demodulator. Because of the loss and multipath effect in the transmission path, the signal received by the receiver is weak and changeable, accompanied by many interferences, which are often much stronger than the useful signal. Therefore, the main targets of the receiver are: sensitivity and selectivity. Frequency source provides accurate and low noise local oscillator signal, which is one of the core parts of radio frequency system. The main index of frequency source is phase noise.