Beam-scanning leaky-wave antenna based on CRLH-metamaterial for millimetre-wave applications Articles uri icon

publication date

  • March 2019

start page

  • 1129

end page

  • 1133


  • 8


  • 13

International Standard Serial Number (ISSN)

  • 1751-8725

Electronic International Standard Serial Number (EISSN)

  • 1751-8733


  • 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° between 57 and 62 GHz, with broadside radiation centred 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 ¿- 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 3.43¿0 × 1.1¿0 × 0.29¿0, respectively, where ¿0 is free space wavelength at 55 GHz. The antenna has a measured impedance bandwidth of 10 GHz (55¿65 GHz) or fractional bandwidth of 16.7%. Its optimum gain and efficiency are 7.8 dBi and 84.2% at 62 GHz. © The Institution of Engineering and Technology 2019.


  • antenna grounds bandwidth dielectric materials directional patterns (antenna) electric impedance metamaterial antennas metamaterials microwave antennas millimeter waves scanning slot antennas traveling wave antennas broadside radiations composite right/left-handed transmission lines dielectric substrates fractional bandwidths free-space wavelengths function of frequency millimetre wave applications radiation properties scanning antennas