摘要
调频连续波雷达(FMCWR)具有分辨率高、信号动态范围大、对周围电磁环境干扰小、抗干扰能力强等特点,得到广泛应用,特别适用于海事交通管制系统(VTS)。由于调频连续波雷达发射的是连续波,不能像脉冲式雷达那样可以采用电开关来控制天线的收发转换,而必须将发射天线和接收天线分隔开来,因此接收天线对发射天线的隔离度就成为FMCWR雷达设计的重要指标。本文根据洛伦兹互易定理,结合平面波谱法(PWS),推导出调频连续波雷达收发天线间的隔离度公式,通过对比仿真计算结果和实测结果,达到了较好的一致,验证了计算方法的有效性。
In recent years,Frequency Modulation Continuous Wave Radar(FMCWR)is widely used in many fields for its eminent characteristics, such as high resolution, large dynamic range,low radiant pollution to environment and good performance in anti-jamming, especially for vessel traffic system. Since its antenna transmitts continuous wave, FMCWR may not adopt the electric switch to control the T/R conversion of the antennas against to the pulse radar. It must isolate the T/R antennas. So the isolated degree of the receiving antenna to the transmitting antenna is considered the important factor in designing FMCWR. Based on the Plane Wave Spectrum(PWS), this paper derives the expression of the isolated degree between T/R antennas. The comparison of the measured result and simulation testing result shows a better consistence and verifies the effectiveness of the calculating methods.
出处
《雷达与对抗》
2004年第2期46-49,共4页
Radar & ECM
