Open AccessBeam‐scanning leaky‐wave antenna based on CRLH‐metamaterial for millimetre‐wave applications
Author(s) -
Alibakhshikenari Mohammad,
Virdee Bal S.,
Khalily Mohsen,
Shukla Panchamkumar,
See Chan H.,
AbdAlhameed Raed,
Falcone Francisco,
Limiti Ernesto
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5101
Subject(s) - metamaterial antenna , optics , leaky wave antenna , radiation pattern , metamaterial , ground plane , antenna efficiency , materials science , antenna measurement , antenna (radio) , microstrip antenna , coaxial antenna , physics , optoelectronics , electrical engineering , engineering
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 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 mm 3 and 3.43 λ 0 × 1.1 λ 0 × 0.29 λ 0 , respectively, whereλ 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.