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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
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A Broadband MS-Based Circularly Polarized Antenna Array Using Sequential-Phase Feeding Network.

Hung Pham-Duy1, Dat Nguyen-Tien1, Thanh Nguyen-Ngoc1

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Summary
This summary is machine-generated.

This study presents a novel circularly polarized metasurface antenna array for C-band satellite communications. The design achieves broadband operation and high gain, crucial for satellite applications.

Keywords:
broadbandcircular polarizationmetasurfacemicrostrip patchsequential-phase feeding structure

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Area of Science:

  • Electromagnetics and Wave Theory
  • Antenna Engineering
  • Metamaterials and Metasurfaces

Background:

  • Satellite communication systems require antennas with specific characteristics like circular polarization, wide bandwidth, and high gain.
  • Metasurfaces offer a promising approach to enhance antenna performance and miniaturization.

Purpose of the Study:

  • To design and validate a circularly polarized metasurface-based antenna array for C-band satellite applications.
  • To achieve broadband operation and high gain characteristics through innovative element design and array configuration.

Main Methods:

  • A single radiating element was designed using a Y-shape patch and a 2x2 unit-cell metasurface.
  • Four such elements were arranged in a 2x2 configuration with a sequential-phase feed network.
  • A prototype was fabricated and measured to verify performance parameters.

Main Results:

  • The antenna array demonstrated a measured operating bandwidth of 20% (4.50-5.50 GHz).
  • This bandwidth is an overlap of a 29.8% impedance bandwidth and a 20% axial ratio bandwidth.
  • A peak broadside gain of 10.5 dBi was achieved across the operating band.

Conclusions:

  • The proposed metasurface antenna array is a viable solution for C-band satellite applications.
  • The design offers a significant improvement in operating bandwidth and gain compared to existing technologies.
  • The compact dimensions make it suitable for integration into satellite systems.