Reduction of dual-band mutual couplings between two antennas by dual-band single-negative epsilon metamaterials

Abstract

In this research, an efficient method using a dual-band ENG (ε-Negative) metamaterial is proposed to reduce the dual-band mutual couplings between two monopole antennas for multiple-input multiple-output application. The present technique can effectively reduce the mutual coupling for two Worldwide Interoperability for Microwave Access 2.6 GHz/3.5 GHz bands. The dual-band isolations are improved by over 10 dB level, according to the introduction of present isolation technique, and the two monopole antennas can reach below 20 dB mutual couplings at the two working bands, which are verified by measurement results.

Keywords:

• dual-band
• mutual coupling
• epsilon-negative (ENG)
• metamaterials

Acknowledgments

This work is supported by the NSFC under Contract No. 61101066 and Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and Shaanxi Province, and partially supported by the Program for New Century Excellent Talents in University of China, NSFC under Contract No. 61072017, and Fundamental Research Funds for the Central Universities.