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Metasurface Reflector (MSR) Loading for High Performance Small Microstrip Antenna Design.
Md Rezwanul Ahsan1, Mohammad Tariqul Islam1, Mohammad Habib Ullah2
1Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
Plos One
|May 29, 2015
Summary
A novel metasurface reflector (MSR) antenna design enhances wireless communication for RFID and WiMAX applications. This MSR-integrated antenna achieves broader bandwidth and higher gain across multiple frequency bands.
Area of Science:
- Electromagnetics and Microwave Engineering
- Antenna Design and Analysis
- Metamaterials and Metasurfaces
Background:
- Conventional antennas face limitations in achieving multiband operation and wide impedance bandwidth.
- Metasurface structures offer unique electromagnetic properties for antenna performance enhancement.
- High dielectric constant substrates are crucial for miniaturization and performance tuning in antenna design.
Purpose of the Study:
- To design, analyze, and construct a multiband microstrip antenna integrated with a metasurface reflector (MSR).
- To evaluate the antenna's suitability for UHF/microwave RFID, WLAN, and WiMAX applications.
- To investigate the performance enhancement achieved by the MSR structure in terms of impedance bandwidth and gain.
Main Methods:
- A meander stripline feed multiband microstrip antenna with a planar circular radiator and horizontal slots was designed.
- A 2D metasurface composed of periodic square metallic elements was integrated as a reflector.
- The antenna prototype was fabricated using a high dielectric bio-plastic substrate (εr = 15).
- Numerical simulations and experimental measurements were conducted for validation.
Main Results:
- The MSR-integrated antenna demonstrated significantly broadened -10 dB impedance bandwidths of 17%, 29%, and 40% in its operating bands.
- Center frequencies for the distinct operating bands were observed at 0.9 GHz, 3.5 GHz, and 5.5 GHz.
- Realized gains were enhanced to 3.62 dBi, 6.09 dBi, and 8.6 dBi for the respective frequency bands.
- Good compliance was observed between simulated and measured results for impedance bandwidth, radiation patterns, and gain.
Conclusions:
- The proposed MSR-loaded antenna effectively broadens impedance bandwidth and enhances gain.
- The antenna exhibits suitable characteristics for UHF/microwave RFID, WiMAX, and WLAN applications.
- The MSR structure is a viable technique for improving the performance of planar monopole antennas.
