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

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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 to 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 0.083λ0 × 0.033λ0 × 0.005λ0, where free-space wavelength (λ0) is 1 GHz.

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Authors and Affiliations

  1. Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Mohammad Alibakhshi-Kenari & Mohammad Naser-Moghadasi

  2. Faculty of Electrical Engineering, K. N. University of Technology, Tehran, Iran

    R. A. Sadeghzadeh

  3. Center for Communications Technology, London Metropolitan University, London, N7 8DB, UK

    Bal Singh Virdee

  4. Dipartimento di Ingegneria Elettronica, Università degli Studi di Roma Tor Vergata, Via del Politecnico 1, 00133, Rome, Italy

    Ernesto Limiti

Authors
  1. Mohammad Alibakhshi-Kenari
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  2. Mohammad Naser-Moghadasi
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  3. R. A. Sadeghzadeh
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  4. Bal Singh Virdee
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  5. Ernesto Limiti
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Correspondence to Mohammad Naser-Moghadasi.

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Alibakhshi-Kenari, M., Naser-Moghadasi, M., Sadeghzadeh, R.A. et al. New CRLH-Based Planar Slotted Antennas with Helical Inductors for Wireless Communication Systems, RF-Circuits and Microwave Devices at UHF–SHF Bands. Wireless Pers Commun 92, 1029–1038 (2017). https://doi.org/10.1007/s11277-016-3590-4

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  • DOI: https://doi.org/10.1007/s11277-016-3590-4

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