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Universal Antenna with a Small Non-Ground Portion for Smartphone Applications

Saqer S. ALja'afreh(1*), Abdulgader Khalfalla(2), Abbas Omar(3)

(1) Electrical Engineering Department, Mutah University, Jordan
(2) Institute for Information Technology and Communications, Otto Von Guericke University, Magdeburg, Germany
(3) Institute for Information Technology and Communications, Otto Von Guericke University, Magdeburg, Germany
(*) Corresponding author


DOI: https://doi.org/10.15866/irecap.v9i4.17082

Abstract


A new, multimode capacitive-fed antenna of size 80×5×4.5 mm3 is proposed for recent WWAN/LTE smartphone wireless applications. The antenna is located to the top edge of the mobile chassis; it occupies a very small non-ground area of 4.5 mm width. The structure is composed of three-edge coupled split-ring resonators (SRR) and two shorting strips. It uses a microstrip feed as a direct coupling line, which is attached to a dual L-shaped strips used to excite different radiating modes. The proposed antenna excites three monopole modes, four dipole modes,and three coupled-fed loop modes. By incorporating the excited modes, it covers all wireless standards and applications that are usually incorporated in recent smartphone devices between 790-6000 MHz. The operation mechanism is discussed and the final design is fabricated and tested in free space. Finally, a dual-element antenna is proposed for the implementation of multiple input multiple output (MIMO) antenna technology. Both results(simulated and measured) of performance parameters of the single element design, and the dual-element design show that the proposed design can be an excellent candidate for resent WWAN/LTE smartphones.
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Keywords


Multiband Antennas; Split Ring Resonators; 4G; Smartphone Antennas

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References


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