利用140 GHz雷达实现目标缩比模型的RCS测量与成像.pdfVIP

第 卷第 期 年 月 43 10 红外与激光工程 2014 10 Vol.43 No.10 Oct.2014 Infrared and Laser Engineering Scale-model targets radar cross section measurement and imaging using 140 GHz monostatic radar 1,2 1 1 1,2 1,2 1,2 Cheng Binbin , Jiang Ge , Yang Chen , Cai Yingwu , Deng Xianjin , Zhang Jian (1. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China ； 2. Terahertz Research Center, China Academy of Engineering Physics, Mianyang 621900, China) Abstract : A monostatic radar at 140 GHz frequency band has been developed for scale -model targets imaging and radar cross section (RCS) measurements. The coherent transceiver using all solid state technique adopts a multiplier chain driving by Ka band source as the transmitter to get an output power of about 0 . 5 mW in the 5 GHz bandwidth and a Schottky diode subharmonic mixer as the receiver to realize coherent detection . This compact range radar has demonstrated good signal - to - noise obtaining 100 dB dynamic range with 3 cm resolution. In addition to inverse synthetic aperture imaging of targets, the system can also measure full angle RCS of selected targets with rotation. Measurements were made on 1/720th scale models of aircraft carrier, simulating P-band frequencies according to scaling laws. The results give some references for the full scale RCS