Frequency reconfigurable multiple-input multiple-output antenna with high isolation
- 1 January 2012
- journal article
- Published by Institution of Engineering and Technology (IET) in IET Microwaves, Antennas & Propagation
- Vol. 6 (10), 1095-1101
- https://doi.org/10.1049/iet-map.2011.0325
Abstract
A frequency reconfigurable multiple-input multiple-output (MIMO) antenna is presented. The proposed MIMO antenna consists of two reconfigurable printed monopole antennas with coupled conductors and an isolation improvement structure located between the two antennas. In order to change the operating frequency, PIN-diodes are embedded in the antennas. According to the on/off state of the PIN-diode, the resonant frequency is changed between the WLAN band (2400–2483 and 5150–5350 MHz) and the m-WiMAX band (3400–3600 MHz). The proposed isolation technique produces an S21 of less than −20 dB for both service bands. Simulation and measurement results confirm the antenna performance. Peak gains of 3.81 dBi at 2.4 GHz, 1.87 dBi at 5.2 GHz and 5.15 dBi at 3.5 GHz are found. Radiation efficiencies are greater than 58.85% over all of the operating frequency bands. The measured envelope correlation coefficient (ECC) and the mean effective gain (MEG) are suitable for use in MIMO antenna systems.Keywords
This publication has 15 references indexed in Scilit:
- A Novel Isolation Technique for Closely Spaced PIFAs for UMTS Mobile PhonesIEEE Antennas and Wireless Propagation Letters, 2008
- Isolation Enhancement Between Two Closely Packed AntennasIEEE Transactions on Antennas and Propagation, 2008
- Reconfigurable antenna for concurrent operation over cellular and connectivity bandsElectronics Letters, 2008
- Reduction of Mutual Coupling Between Closely-Packed Antenna ElementsIEEE Transactions on Antennas and Propagation, 2007
- Two PIFA-Related Miniaturized Dual-Band AntennasIEEE Transactions on Antennas and Propagation, 2007
- The high isolation dual-band inverted F antenna diversity system with the small N-section resonators on the ground planeMicrowave and Optical Technology Letters, 2007
- Integrated MIMO antenna with high isolation characteristicElectronics Letters, 2007
- Modified PIFA and its array for MIMO terminalsIEE Proceedings - Microwaves, Antennas and Propagation, 2005
- Mutual coupling between planar inverted-F antennasMicrowave and Optical Technology Letters, 2004
- Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: a low mutual coupling design for array applicationsIEEE Transactions on Antennas and Propagation, 2003