Development and investigation of a compact band-notched MIMO antenna attaining wideband isolation for UWB applications

Abstract

The sequential layout of a portable ultra-wideband (UWB) monopole antenna, transforming into a compact band-notch (3.15–4.3 GHz rejecting the Wi-Max and the C-Band) multiple-input multiple-output (MIMO) antenna is described in this paper. The diversity layout is designed within a compact size of 39 (l) × 18 (W) mm². Due to the opposite orientation of the two radiators in the diversity configuration and the use of a rectangular parasitic strip near the feed lines, high and wideband isolation (of >20 dB) is attained over the entire UWB spectrum. The proposed layout depicts a stable omnidirectional radiation pattern and a maximal gain of 1.82 dB. The envelope correlation coefficient (ECC) is found to be below 0.18 for the entire UWB spectrum. Empirical verifications in terms of vital diversity parameters and analogy with competing layouts strengthen the candidature of the intended MIMO layout for UWB wireless portable applications.

KEYWORDS:

• Multiple-input multiple-output (MIMO)
• ultra-wideband (UWB)
• meandered metallic strip
• envelope correlation coefficient (ECC)
• diversity gain (DG)
• total active reflection coefficient (TARC)
• mean effective gain (MEG)

Acknowledgements

The authors wish to acknowledge the support of the Microwave and Antenna Research Laboratory at the department of Electronics and Communication Engineering, National Institute of Technology, Durgapur, India for providing the valuable support in measurement of the realized antenna prototype.

Disclosure statement

No potential conflict of interest was reported by the author(s).