Frequency Selective Meta-Structure Embedded Two-Element MIMO Antenna with Enhanced Isolation and Pattern Diversity for WLAN/WiMAX Applications

ABSTRACT

A two-element MIMO antenna, with improved isolation and pattern diversity, is designed and presented. The dual-band MIMO covers both the adjacent upper WLAN (5.2 GHz) and WiMAX (5.8 GHz) bands with clear isolation between them. The unit radiator of the MIMO is a co-planar waveguide-fed trapezoidal patch that achieves its resonant modes by adjusting the slope of the non-parallel sides. A frequency selective meta-structure is placed in-between the two radiating elements to reduce the mutual coupling and achieve pattern diversity. The MIMO offers peak gains of 1.56 and 5.16 dB at 5.2 GHz (5.1–5.34 GHz) and 5.8 GHz (5.68–5.9 GHz), respectively. The port-isolations achieved at WLAN and WiMAX bands are 26 and 23 dB, respectively. The correlation co-efficient (ECC < 0.05), diversity gain (DG > 9.99) and channel capacity loss (CCL < 0.03) also adhere to the criteria for MIMO operation. The measured results are in good agreement with the simulated ones.

KEYWORDS:

• Co-planar waveguide (CPW)
• Frequency selective meta-structure
• Trapezoidal patch
• Two-element MIMO
• WiMAX
• WLAN

Additional information

Notes on contributors

Puspendu Bikash Saha

Puspendu Bikash Saha received his MTech degree in communication engineering in 2015 from the National Institute of Technology Agartala, India. Currently, he is pursuing PhD from the same institution. He has around three years of teaching experience. His research interests are wideband reconfigurable antennas, MIMO antennas, wearable antennas, microwave filters and so on.

Dibyendu Ghoshal

Dibyendu Ghoshal received his PhD (Tech) degree from the Institute of Radio Physics and Electronics, Calcutta University in 1997. He has more than twelve years of teaching experience. He is the author of more than 150 research articles. His areas of interest are microwave and millimeter wave applications, antenna engineering, semiconductor physics and devices, image processing and so on. Email: [email protected]

Rajib Kumar Dash

Rajib Kumar Dash received his MTech degree in communication engineering in 2015 from Biju Patnaik University of Technology, Odisha and is currently pursuing PhD from the National Institute of Technology Agartala. He has around eleven years of teaching experience. His research interests are multiband fractal antennas, wideband antennas, wearable antennas, metamaterial-based antennas and so on. Email: [email protected]