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In this letter, a broadband leaky wave antenna based on dielectric image line (DIL) is proposed in Ku‐band. An H‐shaped metal strip is used to mitigated the open stop band problem. A prototype is measured which exhibits an impedance bandwidth of 33.2% (11.3–15.8 GHz) and the beam scanning of 98° (−60° to 38°) through broadside. The measured peak gain in the band is 15 dBi.
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