Dr. V N Koteswara, Rao Devana, Phani Ponnapalli, Dr. Asa Jyothi, G. Professor, G. S. Reddy, S. C. Sekhar, Dr. N. Radha
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A Compact MIMO Antenna for GPS/PCS/Bluetooth Wireless Applications
In this article, we present a unique, miniaturized multiple input multiple output (MIMO) antenna for use with GPS, PCS, and Bluetooth wireless systems. The antenna consists of a defective ground structure (DGS) and three elliptical patch structures fed by a tapered microstrip feed line. The suggested antenna, which has a -10 dB bandwidth of 1.42-2.52 GHz, is printed on a compact 40x22 mm2 FR-4 substrate. To achieve isolation of >15 dB over the working band, a T-structured stub is inscribed among the two radiating patches. The accomplishment of MIMO diversity characteristics such as envelope correlation coefficient (ECC) < 0.05, diversity gain (DG) > 9.7 dB, peak radiation efficiency of 93.16%, and stable gain of 4.26–5.54 dBi represents evidence that the proposed antenna meets the requirements for portable GPS, PCS, and Bluetooth wireless applications.
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