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Compact dual‐polarized UWB diversity antenna
Author(s) -
Srivastava Gunjan,
Mohan Akhilesh
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29476
Subject(s) - ground plane , diversity gain , mimo , antenna diversity , physics , microstrip antenna , electronic engineering , telecommunications , electrical engineering , antenna (radio) , optics , engineering , beamforming
A compact planar multiple‐input multiple‐output (MIMO)/diversity antenna for portable UWB applications with a size of 27 mm × 28 mm is proposed in this letter. This diversity antenna consists of a microstrip fed crescent‐shaped antenna and a CPW fed circular slot antenna which are orthogonal to each other to obtain dual polarization. Different patterns and polarization diversities of antennas are used to achieve wideband isolation. Moreover, to further enhance the isolation a cross‐shaped slot is etched into the ground plane and a sickle shaped metallic strip is introduced between the two radiating elements. This sickle shape metallic strip not only enhances the isolation, but it also produces an additional resonance at 8.9 GHz. Both the UWB antennas in MIMO systems cover the entire UWB spectrum with low mutual coupling. The isolation between the antenna elements is better than 16 dB. The diversity performance is evaluated in terms of envelope correlation coefficient (ECC) and channel capacity loss (CCL). Both of them are within their acceptable limits (ECC < 0.5, CCL < 0.4 bit/s/Hz). © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2951–2955, 2015