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A Low-Profile, Triple-Band, and Wideband Antenna Using Dual-Band AMC
Rafael Gonçalves Licursi de Mello1, Anne Claire Lepage1, Xavier Begaud1
1LTCI, Télécom Paris, Institut Polytechnique de Paris, 91120 Palaiseau, France.
Sensors (Basel, Switzerland)
|February 28, 2023
Summary
This study presents a novel method for designing a triple-band directive antenna using a dual-band artificial magnetic conductor (AMC). The resulting antenna offers wide bandwidths and high gain, suitable for 4G/5G and Wi-Fi applications.
Area of Science:
- Electromagnetics and Antenna Design
- Metamaterials and Artificial Structures
Background:
- Wideband antennas backed by artificial magnetic conductors (AMCs) typically suffer from reduced bandwidth.
- Optimizing AMC shape can achieve multiband behavior, but designing for wide bands complicates this.
Purpose of the Study:
- To develop a methodology for designing a low-profile, triple-band, wideband directive antenna.
- To leverage both in-band and out-of-band characteristics of a dual-band AMC for antenna design.
Main Methods:
- Utilized a dual-band AMC reflector with optimized shape.
- Designed a directive antenna exploiting AMC's electromagnetic properties.
- Validated the design with a prototype for European 4G/5G and Wi-Fi standards.
Main Results:
- Achieved a triple-band antenna operating at 2.4-2.7 GHz, 3.4-3.8 GHz, and 5.17-6.45 GHz.
- Measured peak gains of 8.0, 9.1, and 10.5 dBi.
- Demonstrated front-to-back ratios >19 dB, cross-polarization < -18 dB, and stable beamwidths.
- Obtained 3 dB gain bandwidths of 34.4%, 19.7%, and 31.0%.
Conclusions:
- The proposed methodology successfully enables the design of low-profile, triple-band, wideband directive antennas.
- The antenna prototype meets European standards for 4G/5G and Wi-Fi (2.4/5/6E).
- The design effectively utilizes AMC properties for enhanced antenna performance across multiple frequency bands.
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