Abstract
This paper introduces a radar absorbing structures (RAS) applied to reduce the in-band radar cross section (RCS) of the array antennas. The structure of the RAS is based on square patch structure loaded with lumped resistances. An array with four patch elements was designed and built, and the RAS was located between two adjacent patch elements. The simulated and measured results show that the radiation performance of the array antenna is preserved when RAS is used. At operating frequency, the RCS of array antenna with RAS is obviously reduced compared with that of the original array.
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