Echo enhancer is applied to small-size target detecting broadly. With the purpose of enhancing the detectable distance, a passive array echo enhancer was designed by using passive square microstrip patch elements with transmission line in this paper. The implementation contains two parts: one is changing the distribution of the current by controlling the length of transmission line to controlling echo direction of the patch; the other is controlling the direction of the echo by changing the distance between array elements. The simulated result shows that the RCS of an array with two elements in the specified direction compared with metal plane in the same size is enhanced and achieves the purpose of echo enhancement observably.
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张翀,韦高,许家栋. 一种用于回波增强的无源微带阵列[J]. 科学技术与工程, 2010, (34): . zhang chong, wei gao, xu jia dong. A Passive Microstrip Array for Echo Enhancment[J]. Science Technology and Engineering,2010,(34).