This paper describes SIW(Substrate Integrated Waveguide)-based feeding antenna for the application of SDR(Software Defined Radar). It is usually well-known that SIWs are good for easy integration, low-loss and electromagnetically immunized characteristics. In particular, it is shown that the size of the antenna is reduced significantly (37.2%) due to the application of meander line structure. The antenna design and verification are performed through commercially available full-EM software.
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