基于噪声匹配的有源接收天线设计  

Design of Active Receiving Antenna Based on Noise-Matching

作　　者：郭陈江[1] 马少鹏[1] 丁君[1] 罗杰[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710068

出　　处：《飞行器测控学报》2008年第3期15-18,共4页Journal of Spacecraft TT&C Technology

摘　　要：为了提高接收天线的增益和灵敏度，采用将天线与低噪声放大器集成到一起设计的方案，将天线的输出阻抗作为放大器的源阻抗，省略了天线与放大器之间的阻抗匹配网络。通过调节天线馈电系统的尺寸调节天线阻抗，使其等于放大器的最佳源阻抗。利用HFSS仿真软件计算天线的辐射特性及阻抗，用ADS Designer软件对低噪声放大器进行优化设计。利用2SC5507晶体管设计了一个工作于2．0GHz的与低噪声放大器集成在一起的缝隙耦合微带天线，所设计的噪声系数为1．664dB，放大器增益为16．75dB。In order to improve the gain and sensitivity of a receiving antenna,the antenna is integrated with a low noise amplifier. The output impedance of the antenna is the source impedance of the amplifier, which can omit the traditional impedance matching network between them. The antenna impedance is regulated to be equal to the best source impedance of the amplifier by adjusting the size of the antenna feeding system. HFSS and ADS Designer are applied in calculating the radiation characteristics and impedance of the antenna and designing the low noise amplifier respectively. A low noise amplifier is integrated with a slot coupling mierostrip antenna, whose noise coefficient is 1,664 dB while the amplifier gain reaches 16.75 dB at 2.0GHz. The used transistor is 2SC5507.

关 键 词：有源网络 最佳噪声匹配 噪声系数 低噪声放大器 

分 类 号：TN827.2[电子电信—信息与通信工程]