Abstract
A low-profile, ultra-wideband (UWB), multi-input multi-output (MIMO) antenna for a personal digital assistant application is proposed.To improve the impedance bandwidth, a 2 mm × 1 mm connecting strip is used on each antenna element. The isolation characteristic between the two antenna elements is improved by inserting two T-shaped stubs. The optimized design parameters were obtained through parametric analysis. The designed antenna has a 10-dB return loss bandwidth of 9 GHz (2.2–11.2 GHz) covering the WiBro, Bluetooth, WiMax, S-DMB, and UWB frequency bands, with an isolation characteristic below −20 dB over the operating frequency. Additionally, the envelope correlation coefficient is less than 0.12. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2165–2170, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25478
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