Abstract
A multiple-input multiple-output (MIMO) WiMAX band-notched antenna with reduced mutual coupling is proposed for ultra-wideband (UWB) applications. The proposed MIMO structure consists of two square monopole antennas with two modified L-shaped slots, a rectangular ground plane structure, and a rectangular parasitic structure for increased isolation. Simulation and measurement studies are used to probe the antenna performance in terms of s-parameters, isolation between the two input ports (S21), antenna gain, group delay, ECC, 2D and 3D radiation pattern. Results show a bandwidth with |S11|, |S22| ≤ −10 dB, |S21| ≤ −20 dB, and frequency ranged from 2.8 to 10.9 GHz excluding a rejected band from 3.4 to 3.9 GHz, focusing on WiMAX frequency band. The MIMO antenna prototype with a compact size of 18 × 36 mm2 is fabricated and measured. Based on the obtained experimental results, the proposed MIMO antenna could be regarded as a good candidate for UWB MIMO antenna with band-notch characteristics.
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