Alibakhshikenari, M.Virdee, B.S.Khalily, M.Shukla, P.See, C.H.Abd-Alhameed, RaedFalcone, F.Limiti, E.2019-03-262019-03-262019-07-03Alibakhshikenari M, Virdee BS, Khalily M et al (2019) Beam-scanning leaky-wave antenna based on CRLH-metamaterial for millimeter-wave applications. IET Microwaves, Antennas & Propagation. 13(8): 1129-1133.90002586http://hdl.handle.net/10454/16916YesThis paper presents empirical results of an innovative beam scanning leaky-wave antenna (LWA) which enables scanning over a wide angle from -35o to +34.5o between 57 GHz and 62 GHz, with broadside radiation centered at 60 GHz. The proposed LWA design is based on composite right/left-handed transmission-line (CRLH-TL) concept. The single layer antenna structure includes a matrix of 3×9 square slots that is printed on top of the dielectric substrate; and printed on the bottom ground-plane are Π and Tshaped slots that enhance the impedance bandwidth and radiation properties of the antenna. The proposed antenna structure exhibits metamaterial property. The slot matrix provides beam scanning as a function of frequency. Physical and electrical size of the antenna is 18.7×6×1.6 mm3 and 3.43􀣅􀫙×1.1􀣅􀫙×0.29􀣅􀫙, respectively; where 􀣅􀫙 is free space wavelength at 55 GHz. The antenna has a measured impedance bandwidth of 10 GHz (55 GHz to 65 GHz) or fractional bandwidth of 16.7%. Its optimum gain and efficiency are 7.8 dBi and 84.2% at 62 GHz.en© 2019 Institution of Engineering and Technology. This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas and Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.Beam-scanning antennaSlot antennaMetamaterialsLeaky-wave antennaMillimeter-wave frequencyArticle