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2<formula formulatype="inline"><tex notation="TeX">$,times,$</tex></formula>2 Microstrip Patch Antenna Array Fed by Substrate Integrated Waveguide for Radar ApplicationsMikulasek, Tomas; Georgiadis, Apostolos; Collado, Ana; Lacik, Jaroslav · IEEE Antennas and Wireless Propagation Letters · 2013