【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。更多还原

【Abstract】 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:28.5GHz±100MHz,27.5GHz±100MHz,26.5GHz±100MHz, ripple in band of less than 3dB,noise coefficient of less than 5,gain of 45dB and controlled 30dB gain.更多还原