论文部分内容阅读
不论其电特性如何,只要是平面对称的目标,在圆极化波照射下,其双站散射特性具有映象(reflection)不对称性、极化互换(reversal)不对称性和极化互换下的映象对称性。熟悉双站散射的这些特性,不仅对判读双站雷达的数据有用,并且易于解释偏焦反射天线特性中的退极化和波束偏离现象。另外,利用其对称性,既可以减少双站散射试验场和偏焦天线的测量次数,也可以减少理论推演或计算机计算所花的时间和费用。本文推导了映象不对称性、极化互换不对称性和极化互换下的映象对称性,并将这种对称关系和电磁互易原理相结合,以确定为表征目标散射特性所需的最少测量次数。
Regardless of its electrical characteristics, as long as it is a plane-symmetric target, the bistatic scattering characteristics of a circularly polarized wave have a reflection asymmetry, a reversal asymmetry and a polarization interaction Replace the image symmetry. Being familiar with these two-station scattering properties is not only useful for interpreting bistatic radar data, but it also makes it easy to interpret the depolarization and beam-deflection phenomena in the properties of deflective-reflex antennas. In addition, the use of its symmetry can reduce the number of measurements of the bistatic scattering test field and the focus antenna, as well as reduce the time and cost of theoretical deduction or computer calculations. This paper deduces the image symmetry under the asymmetry of image, polarization interchange and polarization interchange, and combines this symmetry relationship with the principle of electromagnetic reciprocity to determine the characteristic of the target scattering The minimum number of measurements required.