Improving the Isolation of MIMO Antennas Using Split Ring Resonators

  • Received : 2010.11.04
  • Published : 2010.12.31


This paper proposes a method for improving the isolation characteristic of multi-input multi-output (MIMO) antennas using a split ring resonator (SRR) array structure between the two radiating elements. The fabricated antenna satisfies the 10 dB return loss requirement in the Mobile-WiMAX frequency band from 3.4 GHz to 3.6 GHz. The isolation between the two radiating elements is improved by approximately 20 dB at the center frequency by inserting a SRR array structure. The measured peak gains of the two elements are 2.3 dBi and 2.4 dBi, respectively.


MIMO;Split Ring Resonator;Isolation Characteristic;Metamaterial


  1. D. A. Sanchez-Hernandez, Multiband Integrated Antennas for 4G Terminals, Artech House, Inc., 2008.
  2. K. Kim, K. Park, "The high isolation dual-band inverted F antenna diversity system with the small N-section resonators on the ground plane," Microwave and Optical Technology Letters, vol. 49, pp. 731-734, Mar. 2007.
  3. S. Hong, K. Chung, J. Lee, S. Jung, S. Lee, and J. Choi, "Design of a diversity antenna with stubs for UWB applications," Microwave and Optical Technology Letters, vol. 50, 1352-1356, May 2008.
  4. C. Hsu, K. Lin, H. Su, H. Lin, and C. Wu, "Design of MIMO antennas with strong isolation for portable applications," Antennas and Propagation Society International Symposium, pp. 1-4, 2009.
  5. R. Marques, F. Martin, and M. Sorolla, Metamaterials with Negative Parameters: Theory, Design and Microwave Applications, Wiley Inter-Science, 2008.
  6. C. C. Courtney, "Time-domain measurement of the electromagnetic properties of materials," IEEE Transaction on Microwave Theory and Techniques, vol. 46, pp. 517-522, May 1998.
  7. R. W. Ziolkowski, "Design, fabrication, and testing of double negative metamaterials," IEEE Transaction on Antennas Propagation, vol. 51, pp. 1516- 1529, Jul. 2003.
  8. Ansoft High Frequency Structure Simulator (HFSS), Ver.11.1, ANSYS Inc.
  9. S. Blanch, J. Romeu, and I. Cobella, "Exact representation of antenna system diversity performance from input parameter description," Electronics Letters, vol. 39, pp. 705-707, May 2003.

Cited by

  1. Hybrid MIMO Antenna Using Interconnection Tie for Eight-Band Mobile Handsets vol.15, pp.3, 2015,
  2. Design of a Double-Faced Monopole Antenna Using the Coupling Effect of Induced Currents vol.23, pp.12, 2012,
  3. Control of Phase and Phase Slope with Reinvestigation of 1D CRLH Transmission Lines vol.12, pp.4, 2012,
  4. MIMO-configured WLAN access point antenna with high port isolation vol.31, pp.10, 2017,
  5. Design of a MIMO Antenna Using a RF MEMS Element vol.24, pp.12, 2013,