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A Frequency-Selective Reconfigurable Antenna for Wireless Applications in the S and C Bands
Alexandros Sakkas1, Vasilis Oikonomou1, Giorgos Mystridis1
1Electronics-Telecommunications and Applications Laboratory, Physics Department, University of Ioannina, 451 10 Ioannina, Greece.
Sensors (Basel, Switzerland)
|November 14, 2023
Summary
This study introduces a compact, low-cost reconfigurable patch antenna for S and C bands. It achieves multifrequency operation using a single PIN diode, ideal for crowded wireless applications.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Wireless applications increasingly utilize the S and C bands, leading to spectrum congestion.
- Existing antennas often lack reconfigurability, limiting their adaptability to dynamic RF environments.
Purpose of the Study:
- To design and fabricate a compact, multifrequency reconfigurable patch antenna.
- To enable operation across multiple resonant frequencies within the S and C bands.
- To achieve efficient frequency switching using a low-voltage PIN diode.
Main Methods:
- A rectangular ring patch antenna was designed on an FR-4 substrate.
- Reconfiguration was implemented using a single PIN diode integrated into the ground plane.
- Antenna performance was evaluated across three distinct resonant modes.
Main Results:
- The antenna exhibits resonant frequencies at 2.07 GHz, 4.63 GHz, and 6.22 GHz.
- Frequency switching is achieved with a control voltage below 0.9 V.
- The fabricated antenna shows a total bandwidth of approximately 1 GHz, VSWR below 1.02, and return loss better than -40 dB.
Conclusions:
- The proposed antenna offers a low-cost, compact, and easily implementable solution for multifrequency wireless applications.
- The single PIN diode reconfiguration method provides efficient and versatile frequency selection.
- The antenna's performance characteristics make it suitable for spectrum-congested RF environments.
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