CAJ | 학술논문

介绍了宽带正交调制器的工作原理和传统设计方法. 针对宽带卫星通信系统中调制信号正交性误差对信号传输质量影响较大的问题, 通过阻抗匹配、差分信号传输和接口电平功率控制等技术手段, 对无源非线性器件的外围电路进行优化设计. 使调制信号的EVM值提高了7%以上, 在大幅提升宽带正交调制器的性能指标的同时, 扩展了宽带正交调制器对本振功率、基带信号功率的适应范围.
개소료관대정교조제기적공작원리화전통설계방법. 침대관대위성통신계통중조제신호정교성오차대신호전수질량영향교대적문제, 통과조항필배、 차분신호전수화접구전평공솔공제등기술수단, 대무원비선성기건적외위전로진행우화설계. 사조제신호적EVM치제고료7%이상, 재대폭제승관대정교조제기적성능지표적동시, 확전료관대정교조제기대본진공솔、 기대신호공솔적괄응범위.
This paper introduces the operating principle and traditional design methods of broadband quadrature modulator.In the broadband satellite communication system,the orthogonality deviation will influence significantly the transmission quality of modulation signals.In order to solve this problem,by using such technical methods as impedance matching,differential signal transmission,and in-terface level power control,this paper puts forward the optimization design scheme for peripheral circuit of passive nonlinearity devices. As a result,the EMV value of modulation signal is increased more than 7%,the performance index of broadband quadrature modulator is improve significantly,and the application range of broadband quadrature modulator on local oscillator power and baseband signal power is extended.