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Realizing UWB Antenna Array with Dual and Wide Rejection Bands Using Metamaterial and Electromagnetic Bandgaps
Ayman A Althuwayb1, Mohammad Alibakhshikenari2, Bal S Virdee3
1Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka, Aljouf 72388, Saudi Arabia.
Micromachines
|April 3, 2021
Summary
This study presents a novel ultra-wideband (UWB) antenna array with dual notched functionality using metamaterial and electromagnetic bandgap techniques. The enhanced array effectively suppresses interference signals from WLAN and X-band satellite communications.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Materials Science
Background:
- Ultra-wideband (UWB) systems require antennas with broad impedance bandwidth.
- Interference from coexisting wireless systems (e.g., WLAN, satellite) degrades UWB performance.
- Existing antenna designs often struggle to achieve both wide bandwidth and effective interference rejection within a compact footprint.
Purpose of the Study:
- To develop an ultra-wideband (UWB) antenna array with dual notched functionality.
- To enhance impedance bandwidth and gain using metamaterial (MTM) techniques.
- To integrate electromagnetic bandgap (EBG) structures for targeted interference suppression.
Main Methods:
- Designed and fabricated a reference hexagonal patch antenna array on FR-4 substrate.
- Incorporated metamaterial characteristics by embedding hexagonal slots and using metallic vias for a composite right/left-handed structure.
- Introduced electromagnetic bandgap (EBG) by etching circular slots on the ground plane for dual-band rejection.
Main Results:
- The metamaterial-enhanced antenna array achieved a wide operating frequency range of 2-12 GHz with an average gain of 5 dBi.
- Dual-band rejection was successfully implemented, specifically targeting the wireless local area network (WLAN) band (5.15-5.825 GHz) and the X-band satellite downlink (7.10-7.76 GHz).
- The proposed dual-notched antenna array maintained compact dimensions (20 mm × 20 mm × 0.87 mm) and offered superior interference rejection compared to existing designs.
Conclusions:
- The integration of metamaterial and EBG techniques provides an effective solution for wideband dual-notched UWB antenna arrays.
- The proposed design offers significant improvements in bandwidth, gain, and interference suppression capabilities.
- This compact and efficient antenna array is suitable for applications requiring coexistence with multiple wireless communication systems.
Keywords:
antennasbandgap rejectioncomposite right/left-handed structures (CRLH)electromagnetic bandgap (EBG)metamaterials (MTM)ultra-wide band (UWB)More Related Videos
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