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Optically switched multiband antenna based on Vivaldi structure.

Peiying Lin1, Yuting Wu1, Zhouyi Wu1

  • 1Laboratory of Applied Research On Electromagnetics (ARE), College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China.

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|September 19, 2022
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This summary is machine-generated.

This study introduces an optically reconfigurable antenna using photodiodes for multiband operation. The novel Vivaldi antenna design achieves frequency switching and stable high-frequency performance for communication and radar integration.

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Traditional antennas often lack frequency agility.
  • The need for adaptable communication systems drives research into reconfigurable antennas.

Purpose of the Study:

  • To propose and validate an optically frequency-reconfigurable antenna with multiband capabilities.
  • To demonstrate frequency switching using photodiodes integrated into a Vivaldi antenna structure.

Main Methods:

  • A Vivaldi antenna structure was modified with three parallel branches containing photodiodes.
  • Photodiodes acted as photoconductive switches, controlled by optical illumination.
  • Antenna performance was simulated and experimentally verified across various frequency bands.

Main Results:

  • The antenna achieved reconfigurable narrowband modes at 300 MHz, 677 MHz, and 1.02 GHz with varying gains.
  • Stable operation was observed in the 3.2-3.8 GHz and 5.1-6.5 GHz bands, with a maximum gain of 7.51 dB.
  • Optical control enabled specific frequency transmission and shielding.

Conclusions:

  • The proposed antenna design successfully demonstrates optical frequency reconfigurability and multiband performance.
  • This technology holds significant potential for integrated communication and radar systems.
  • The design offers a versatile solution for adaptable radio frequency applications.