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Dual-Band Dual-Beam Shared-Aperture Reflector Antenna Design with FSS Subreflector.

Qunbiao Wang1, Peng Li1, Guodong Tan2

  • 1State Key Laboratory of Electromechanical Integrated Manufacturing of High-Performance Electronic Equipments, Xidian University, Xi'an 710071, China.

Sensors (Basel, Switzerland)
|May 14, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a dual-band, dual-beam shared-aperture antenna using a frequency-selective surface (FSS) subreflector. The design allows independent optimization of two spatially overlapping beams for enhanced directivity performance.

Keywords:
FSS subreflectordual-band dual-beam reflector antennashaped reflector antennashared antenna aperture

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Area of Science:

  • Electromagnetics and Applied Electrophysics
  • Antenna Theory and Design
  • Metamaterials and Frequency-Selective Surfaces

Background:

  • Traditional reflector antennas often face limitations in achieving dual-band and dual-beam functionalities simultaneously.
  • Achieving spatially overlapping beams at different frequencies presents a significant design challenge.
  • Frequency-selective surfaces (FSS) offer unique electromagnetic properties for advanced antenna designs.

Purpose of the Study:

  • To design and validate a novel dual-band, dual-beam shared-aperture reflector antenna.
  • To enable independent optimization of two spatially overlapping beams operating at distinct frequencies.
  • To demonstrate the antenna's directivity performance for regional coverage applications.

Main Methods:

  • A Cassegrain reflector antenna configuration was employed.
  • A frequency-selective surface (FSS) was utilized as the subreflector.
  • The antenna design involved optimizing the main reflector shape and the FSS subreflector's unit cell and geometry.
  • A cost function was defined to guide the optimization towards desired directivity.

Main Results:

  • The proposed antenna design successfully generated two shaped beams at different frequencies with spatial overlap.
  • Independent optimization of individual beam contours was achieved through tailored design of the main reflector and FSS subreflector.
  • Numerical experiments validated the antenna's performance using China and Shaanxi province as benchmarks.

Conclusions:

  • The developed dual-band, dual-beam shared-aperture antenna with an FSS subreflector is a viable solution for achieving complex beam shaping and frequency operation.
  • The independent beam optimization methodology offers flexibility in tailoring antenna performance for specific coverage requirements.
  • The validated design demonstrates significant potential for advanced communication and remote sensing applications.