NDLI: Capacity-enhancement in MIMO systems using biomimetic electrically small antenna arrays

Content Provider	IET Digital Library
Author	Nikkhah, Mohammad Ranjbar Panahi, Mohammad Ali Luyen, Hung Bahrami, Hamid Behdad, Nader
Abstract	The authors investigate the performance of multi-input–multi-output (MIMO) communications systems that exploit biomimetic antenna arrays (BMAAs) with electrically small-aperture dimensions. By exploiting the mutual coupling between closely spaced radiating elements and extracting the maximum available power from all excitation modes of the array, BMAAs can significantly outperform conventional antenna arrays with similar aperture sizes. As a proof of concept demonstration, they examine the use of two-element BMAAs consisting of two λ / 4 monopole antennas with variable element spacing in an MIMO system. The capacity of MIMO systems using such BMAAs is compared with those that use conventional antenna arrays with the same element types and spacing. Their simulation results demonstrate that using BMAAs can offer considerable capacity enhancements in an MIMO system. To experimentally verify these results, a prototype of a two-element BMAA operating at 615 MHz with element spacing of λ / 10 and a regular array prototype with similar antenna elements and dimensions are fabricated and characterised. The performance of MIMO systems using these two antennas is modelled using numerical channel modelling using the measured antenna responses. These results are found to be in good agreement with theoretical predictions.
Starting Page	2001
Ending Page	2006
Page Count	6
ISSN	17518725
Volume Number	12
e-ISSN	17518733
Issue Number	Issue 13, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/12/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5185
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-06-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Antenna Radiation Pattern Biomimetic Electrically Small Antenna Array Capacity Enhancements Capacity-enhancement Channel Capacity Closely Spaced Radiating Element Electrically Small-aperture Dimensions Excitation Mode Maximum Available Power Extraction Measured Antenna Responses MIMO Communication MIMO Communication System Monopole Antenna Array Multiinput-multioutput Communication System Mutual Coupling Numerical Analysis Numerical Channel Modelling Numerical Method Radio Link And Equipment Regular Array Prototype Two-element BMAA Variable Element Spacing Λ/4 Monopole Antennas
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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