基于超外差结构的Ka波段多信道接收机  

Ka-band Multichannel Receiver Based on Superheterodyne Structure

作　　者：刘文豹[1] 杨自强[1] 陈涛[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《压电与声光》2014年第1期140-142,146,共4页Piezoelectrics & Acoustooptics

基　　金：中央高校基本科研业务费基金资助项目(ZYGX2010J026);自然科学基金青年科学基金资助项目(61006026)

摘　　要：提出一种结构简单,设计成本低的多信道接收机方案。基于该方案设计出一个Ka波段三信道的毫米波接收机。采用超外差结构和二次下变频技术,利用切换不同的第一本振实现同一通道对不同信道的信号接收。利用ADS软件对频谱规划进行仿真和优化,选择合适的本振和中频。研制出一个结构简单,性能优异的Ka波段多信道接收机,该接收机的主要指标为:28.5GHz±100MHz、27.5GHz±100MHz、26.5GHz±100MHz,带内波段小于3dB,噪声系数小于5,增益为45dB,30dB增益可控。A multi-channel receiver scheme with simple structure and low-cost design was presented in this paper.A Ka-band millimeter wave receiver with three channels was designed based on the scheme.The superheterodyne structure and secondary down-conversion technology were used for the receiver.The signal from different channel can be received in the same channel by switching different firs local vibration.The spectrum planning was simulated and optimized by ADS software,and thus the appropriate local vibration and intermediate frequency can be chosen.A Ka-band multichannel receiver with simple structure and excellent performance was developed.The main specifications of the receiver were as follows：28.5 GHz± 100 MHz,27.5 GHz±100 MHz,26.5 GHz±100 MHz,ripple in band of less than 3 dB,noise coefficient of less than 5,gain of 45 dB and controlled 30 dB gain.

关 键 词：接收机 KA波段 超外差式 二次下变频 多信道 

分 类 号：TN928[电子电信—通信与信息系统] TN948.55[电子电信—信息与通信工程]