New CRLH-Based Planar Slotted Antennas with Helical Inductors for Wireless Communication Systems, RFCircuits and Microwave Devices at UHF–SHF Bands

Alibakhshi-Kenari, Mohammad and Naser-Moghadasi, Mohammad and Sadeghzadeh, Ramazan Ali and Virdee, Bal Singh and Limiti, Ernesto (2016) New CRLH-Based Planar Slotted Antennas with Helical Inductors for Wireless Communication Systems, RFCircuits and Microwave Devices at UHF–SHF Bands. Wireless Personal Communications. pp. 1-10. ISSN 0929-6212

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Abstract

Two novel planar slotted-antennas (PSAs) are presented that exhibit good radiation characteristics at the UHF-SHF bands. The proposed antennas are constructed using metamaterial unit-cells constituted from capacitive slots etched in the radiating patch and grounded spiral shaped inductive stubs. The proposed PSA design is fabricated on a commercially available dielectric substrate, i.e. Rogers RO4003 with permittivity of 3.38 and thickness of 1.6 mm. The first PSA comprising five symmetrical unit-cells of slot-inductor-slot configuration operates over a wide bandwidth extending from 1–4.2 GHz with a peak gain of 1.5 dBi and efficiency of 35% at 2 GHz. The second PSA consists of ten asymmetrical unit-cells of slot-inductor configuration on the same size of substrate as the first PSA, enhances the antenna gain by 2 dB and efficiency by 25% and operates over 0.75–4.5 GHz. The asymmetrical unit-cell effectively increases the aperture size of the antenna without comprising its size. The electrical size of the antenna is 0.083λo×0.033λo×0.005λo, where free-space wavelength (λo) is 1 GHz.

Item Type: Article
Uncontrolled Keywords: Planar slotted antennas; Metamaterial; Composite right/left handed transmission-lines; UHF–SHF bands; RF circuits; Microwave devices; Wireless communications systems
Subjects: 600 Technology > 620 Engineering & allied operations
Department: School of Computing and Digital Media
Related URLs:
Depositing User: Bal Virdee
Date Deposited: 16 Aug 2016 10:31
Last Modified: 10 Oct 2016 15:05
URI: http://repository.londonmet.ac.uk/id/eprint/1097

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