毫米波脊波导宽带混频器  

Millimeter Wave Wide Band Mixer with Ridge Waveguide

作　　者：蒋金水[1] 李兴国[1] 吴文[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《南京理工大学学报》2000年第5期437-440,共4页Journal of Nanjing University of Science and Technology

摘　　要：该文介绍用双脊波导作信号端制作毫米波宽频带混频器的设计方法。实验表明 ,采用脊波导制作的混频器 ,信号端全频段驻波系数小于 2 0 ,本振端在 32 0～ 38 0GHz内驻波系数小于 2 5。当 fif =5 0 0MHz ,本振在 32 0～ 38 0GHz任一频率时 ,噪声系数小于 5 0dB。由于这种混频器具有交叉场平衡混频器的特点 ,在 2 6 5～ 40 0GHz频率范围内 ,信号端与本振端隔离度大于 2 0dB。A design method of mm wave mixer with double ridged waveguide used as signal port has been presented.The experimental results show that the VSWR of signal port is less than 2.0 over full Ka bandwidth and local port less than 2.5 at 32.0～38.0 GHz. Noise figure is less then 5.0 dB over an instantaneous IF bandwidth of 500 MHz, when LO frequency located at 33.0～38.0 GHz. Because the mixer has some advantages of crossed field mixer, LO to RF isolation is greater than 20 dB at 26.5～40 GHz.

关 键 词：双脊波导 宽波段 平衡混频器 噪声系数 毫米波 脊波导宽带混频器 

分 类 号：TN773[电子电信—电路与系统]