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Related Concept Videos

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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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Design and Implementation of C-Band Large-Power Planar Butler Matrix in SRS.

Jinfeng Li1, Liping Yan1, Changjun Liu1

  • 1The School of Electronics and Information, Sichuan University, Chengdu 610064, China.

Sensors (Basel, Switzerland)
|April 13, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a high-power Butler matrix beamforming network for satellite remote sensing (SRS) applications. The novel design achieves excellent performance, including high power handling and broad bandwidth, crucial for SRS systems.

Keywords:
Butler matrixmultipactorpower thresholdshort-ended stubssquare coaxial line

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Area of Science:

  • Electrical Engineering
  • Microwave Engineering
  • Satellite Remote Sensing

Background:

  • Satellite remote sensing (SRS) requires high-power microwave components.
  • Butler matrices are critical for transmitting antenna arrays in SRS.

Purpose of the Study:

  • To design, simulate, and test a large-power planar beamforming network for SRS at C-band.
  • To develop a 4x4 Butler matrix utilizing square coaxial lines and short-ended stubs.

Main Methods:

  • Electrical and mechanical design of a 4x4 Butler matrix.
  • Integration of short-ended stubs for bandwidth enhancement and structural support.
  • Simulation and experimental validation of performance metrics.

Main Results:

  • The Butler matrix operates effectively from 3.8 GHz to 4.2 GHz.
  • Achieved reflection coefficient < -18 dB and isolation > 23 dB.
  • Demonstrated insertion loss < 0.6 dB, phase error < ±6°, and peak power of 9 kW.

Conclusions:

  • The proposed Butler matrix beamforming network meets SRS requirements for high-power microwave components.
  • The design demonstrates consistent simulation and measured results, validating its efficacy.
  • The compact size (440 × 400 × 40 mm³) makes it suitable for practical SRS applications.