CST – Computer Simulation Technology

Design and Performance Study of a Dual-Element Multiband Printed Monopole Antenna Array for MIMO Terminals
Sultan Shoaib, Imran Shoaib, Nosherwan Shoaib, Xiaodong Chen, Clive G. Parini
IEEE Antennas and Wireless Propagation Letters
Volume: 13, 2014
329 - 332
Antenna, decoupling, envelope correlation coefficient, multiband antenna, multiple-input–multiple-output (MIMO) antenna, printed monopole antenna
This letter presents a study on linearly polarized compact multiband multiple-input–multiple-output (MIMO) antenna system for small mobile terminals. The MIMO antenna system consists of two symmetric printed monopole antennas with edge-to-edge separation of 0.097 ?0 at 900 MHz. Each antenna element has a capacitive feed and is composed of two twisted lines, a parasitic loop, and a shorting trip that generate five resonant modes around 900, 1800, 2100, 3500, and 5400 MHz, covering GSM850/900, DCS, PCS, UMTS, WLAN, and WiMAX frequency bands. Two inverted-L shaped branches and a rectangular slot with one circular end, etched on the ground plane, were introduced to improve the isolation between antenna elements. The isolation achieved is higher than 15 dB in the lower band and 20 dB in the upper bands, leading to an envelope correlation coefficient of less than 0.025. The simulated performance of the designed antenna system has been verified in the experiment.

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