# Dual band Notched 2-port UWB MIMO antenna reconfiguration using lumped capacitors

## TL;DR

This paper introduces a reconfigurable UWB MIMO antenna that can switch between frequencies to avoid interference with WLAN and WiMAX.

## Contribution

The novelty lies in using lumped capacitors to enable dual-band notching for interference mitigation in UWB MIMO antennas.

## Key findings

- The antenna achieves a band-notch at 5.4 GHz to avoid WLAN interference.
- Frequency reconfigurability is achieved by shifting the band-notch to 3.5 GHz for WiMAX interference mitigation.
- The design shows good agreement between simulated and experimental results in impedance, radiation, and diversity performance.

## Abstract

In this paper, a dual port reconfigurable band-notched UWB MIMO antenna is presented to reduce the interference with WLAN and WiMAX applications. The suggested MIMO antenna is designed on RO 4350 substrate with partial ground plane for achieving the UWB frequency range with a band-notch at 5.4 GHz to avoid interference with WLAN application. An isolation structure is merged with the partial ground plane to achieve an isolation better than 17 dB between the two elements. Two pairs of lumped capacitors are embedded in the band stop resonators for achieving frequency reconfigurability by shifting the band stop behavior from 5.4 GHz to 3.5 GHz for interference mitigation with WiMAX application. The suggested MIMO antenna is experimentally fabricated and tested to validate the obtained simulated results since a good consistency between both results is achieved not only the impedance characteristics, but also the radiation and diversity outcomes. The new contribution of presented MIMO antenna is evident when it compared with state-of-the-art antennas which confirms the ability of the fabricated model to be utilized for various wireless communication applications in the microwave frequency range.