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Alibakhshi-Kenari, Mohammad; Naser-Moghadasi, Mohammad; Sadeghzadeh, Ramazan Ali; Virdee, Bal Singh; Limiti, Ernesto
Publisher: Springer
Languages: English
Types: Article
Subjects: dewey620
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 0.083λo × 0.033λo × 0.005λo, where free-space wavelength (λo) is 1 GHz.
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    • 1. Liu, L., Cheung, S.W., & Yuk, T. I. (2011). Bandwidth improvements using ground slots for compact UWB microstrip-fed antennas. In Progress in Electromagnetics Research Symposium (PIERS). Suzhou, China.
    • 2. Cheung, S. W., Liu, L., Azim, R., & Islam, M. T. (2011). A compact circular-ring antenna for ultrawideband applications. Microwave and Optical Technology Letters, 53, 2283-2288.
    • 3. Sun, Y. Y., Cheung, S. W., & Yuk, T. I. (2011). Studies of planar antennas with different radiator shapes for ultra-wideband body-centric wireless communications. In Progress in Electromagnetics Research Symposium (PIERS). Suzhou, China.
    • 4. Zhang J., Sun, X. L., Cheung, S. W., & Yuk, T. I. (2012). CPW-coupled-fed elliptical monopole antenna for UWB applications. In IEEE Radio Wireless Week (pp. 295-298).
    • 5. Sun, Y. Y., Islam, M. T., Cheung, S. W., Yuk, T. I., Azim, T., & Misran, N. (2011). Offset-fed UWB antenna with multi-slotted ground plane. In IEEE international workshop on antenna technology (pp. 432-436).
    • 6. Sun, Y. Y., Cheung, S. W., & Yuk, T. I. (2012). Planar monopole ultra-wideband antennas with different radiator shapes for body-centric wireless networks. In Progress in Electromagnetics Research Symposium. Kuala Lumpur, Malaysia.
    • 7. Engheta, N., & Ziolkowski, R. W. (2006). Electromagnetic metamaterials: Physics and engineering explorations. Hoboken: Wiley and IEEE Press.
    • 8. Alibakhshi-Kenari, M., Naser-Moghadasi, M., Virdee, B. S., Andujar, A., & Anguera, J. (2015). Compact antenna based on a composite right/left handed transmission line. Microwave and Optical Technology Letters, 57(8), 1785-1788.
    • 9. Eleftheriades, G. V. (2009). EM transmission-line metamaterials. Materialstoday, 12(3), 30-41.
    • 10. Ansoft HFSS. www.ansoft.com/products/hf/hfss.
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