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

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Author(s): Mohammad Alibakhshikenari¹ ; Bal S. Virdee² ; Mohsen Khalily³ ; Panchamkumar Shukla² ; Chan H. See^{4, 5} ; Raed Abd-Alhameed^{6, 7} ; Francisco Falcone⁸ ; Ernesto Limiti¹
- Affiliations: 1: Electronic Engineering Department , University of Rome “Tor Vergata” , Via del politecnico 00133 , Rome , Italy ;
  2: London Metropolitan University , Center for Communications Technology & Mathematics, School of Computing & Digital Media, London N7 8DB , UK ;
  3: Institute for Communication Systems, Home of 5G Innovation Centre (5GIC) , University of Surrey , Guildford, GU2 7XH , UK ;
  4: School of Engineering and the Built Environment , Edinburgh Napier University , 10 Colinton Road, Edinburgh, EH10 5DT , UK ;
  5: School of Engineering , University of Bolton , Deane Road, Bolton, BL3 5AB , UK ;
  6: School of Electrical Engineering & Computer Science , University of Bradford , Bradford, BD7 1DP , UK ;
  7: Department of Communication and Informatics Engineering , Basra University College of Science and Technology , Basra 61004 , Iraq ;
  8: Electric and Electronic Engineering Department , Universidad Pública de Navarra , Spain
Source: Volume 13, Issue 8, 03 July 2019, p. 1129 – 1133
DOI: 10.1049/iet-map.2018.5101 , Print ISSN 1751-8725, Online ISSN 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 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 3.43 $λ 0$ × 1.1 $λ 0$ × 0.29 $λ 0$ , respectively, where $λ 0$ 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.

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

References

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