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A Printed Reconfigurable Monopole Antenna Based on a Novel Metamaterial Structures for 5G Applications
Saba T Al-Hadeethi1, Taha A Elwi2, Abdullahi A Ibrahim1
1Electrical and Computer Engineering Department, Graduate School of Science, Altinbas University, Istanbul 34217, Turkey.
Micromachines
|January 21, 2023
Summary
This study introduces a novel metamaterial (MTM) antenna for 5G networks, enhancing gain-bandwidth. The antenna
Area of Science:
- Electrical Engineering
- Electromagnetics
- Materials Science
Background:
- 5G mobile communication networks require advanced antenna solutions.
- Metamaterial (MTM) unit cells offer unique electromagnetic properties.
- Printed monopole antennas are suitable for mobile devices.
Purpose of the Study:
- To design and fabricate a novel printed monopole antenna using cascading multi-stage metamaterial (MTM) unit cells.
- To enhance the antenna's gain-bandwidth product for 5G sub-6GHz applications.
- To investigate the tunability of antenna gain using optical switches.
Main Methods:
- The antenna was constructed using printed conductive traces, four MTM unit cells, and T-Resonator (TR) structures on a Taconic RF-43 substrate.
- A coplanar waveguide (CPW) feed was used.
- The antenna's performance was evaluated through S11, radiation patterns, and gain measurements.
- Optical switches with LDR resistors were integrated to control antenna gain.
Main Results:
- The proposed antenna achieved acceptable impedance matching (S11 ≤ -10 dB) at 3.7, 4.6, 5.2, and 5.9 GHz.
- Average gain ranged from 9.1-11.6 dBi across relevant frequency bands.
- Tunable gain at 5.85 GHz varied from 2 dBi to 11.6 dBi by adjusting LDR resistance.
- The antenna demonstrated acceptable bit error rate (BER) performance with gain variation.
Conclusions:
- The novel MTM-based printed monopole antenna shows significant potential for 5G applications.
- The integrated optical switches enable dynamic control of antenna gain.
- The antenna's performance in free space and near a human body was experimentally validated for portable use.
