New Compact antenna based on simplified CRLH‐TL for UWB wireless communication systems |
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Authors: | Mohammad Alibakhshi‐Kenari Mohammad Naser‐Moghadasi Ramazan Ali Sadeghzadeh Bal Singh Virdee Ernesto Limiti |
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Affiliation: | 1. Faculty of Eng, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Department of Elec. and Comp. Eng, K. N. Toosi University of Tech, Tehran, Iran;3. London Metropolitan University, Centre for Communications Technology, London, United Kingdom;4. Dipartimento Di Ingegneria Elettronica, Università Degli Studi Di Roma Tor Vergata, Roma, Italy |
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Abstract: | This letter presents the experimental results of a novel planar antenna design which is synthesized using simplified composite left/right‐handed transmission‐line (SCRLH‐TL), which is a version of a conventional composite left/right handed‐transmission‐lines (CRLH‐TL), however, with the omission of shunt‐inductance in the unit‐cell. SCRLH‐TL exhibits a right‐handed response with nonlinear dispersion properties and a smooth Bloch‐impedance distribution. Arranged within the inner slot of the antenna are three smaller rectangular patch radiators. Each patch radiator is embedded with an E‐shaped notch, and located in the antenna conductor is a larger E‐shaped notch next to the 50‐Ω termination. The E‐shaped notches constitute SCRLH‐TL property. The gap in the slot between the smaller patches and the conductor next to the larger E‐shaped notch determines the impedance bandwidth of the antenna. The dimensions of the smaller patches determine the radiation characteristics of the antenna. The antenna is excited using a conductor‐backed coplanar waveguide transmission‐line. The antenna covers a bandwidth of 7.3 GHz between 0.7 GHz and 8GHz, which corresponds to 167.81%. In this band, the antenna resonates at 4.75 GHz and 7 GHz; the gain and radiation efficiency at these frequencies are 4 dBi—80% and 3.6 dBi—73%, respectively. The antenna's performance was validated through measurement. The antenna has dimensions of 0.0504λ0 × 0.0462λ0 × 0.0018λ0, where λ0 is free‐space wavelength at 700 MHz. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:217–225, 2016. |
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Keywords: | patch antenna ultra‐wideband antenna simplified composite right/left‐handed transmission line (SCRLH) wireless communication systems coplanar waveguide (CPW) |
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