Reduction of Mutual Coupling in UWB/MIMO Antenna Using Stub Loading Technique
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Sciendo
Abstract
The research presents mutual coupling reduction
between UWB-MIMO antenna elements using stub loading
technique. The proposed 2 × 2 UWB antenna geometry consists of
two circular-shaped monopole radiators with a partial ground for
perfect impedance matching. Stubs of 20 mm × 0.2 mm are
inserted between the two antenna elements in the ground plane to
improve the isolation. The decoupling stub leads to a mutual
coupling reduction of less than 20 dB. The farfield measurement
at a selected frequency of 10 GHz confirms an omnidirectional
radiation pattern. Different MIMO antenna metric such as
channel capacity loss (CCL), mean effective gain (MEG), total
active reflection coefficient (TARC), envelope correlation
coefficient (ECC), and surface current are presented. Details of
the design considerations and the simulation and measurement
results are presented and discussed. The proposed MIMO antenna
array can be well suited for UWB applications.
Description
Keywords
Diversity antenna, Error correlation coefficient, MIMO antenna, Mutual coupling, Slotted stub, UWB antenna