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Alibakhshikenari, Mohammad, Virdee, Bal Singh, Khalily, Mohsen, Shukla, Pancham, See, Chan, Abd-Alhameed, Raed, Falcone, Francisco and Limiti, Ernesto (2019) Beam-scanning leaky-wave antenna based on CRLH-metamaterial for millimeter-wave applications. IET Microwaves, Antennas & Propagation, 13 (8). pp. 1129-1133. ISSN 1751-8725
This paper presents empirical results of an innovative beam scanning leaky-wave antenna (LWA) which enables scanning over a wide angle from -35 to +34.5 degrees 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 T-shaped 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 3.43λo×1.1λo×0.29λo, respectively; where λo 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.
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