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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
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The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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A Compact Broadband Power Combiner for High-Power, Continuous-Wave Applications.

Zihan Yang1, Qiang Zhang1, Kelin Zhou1

  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.

Micromachines
|February 24, 2024
PubMed
Summary
This summary is machine-generated.

A novel sixteen-way radial-line waveguide combiner efficiently synthesizes microwave signals for solid-state power sources. This compact device offers high power capacity and low insertion loss, crucial for advanced RF applications.

Keywords:
RF solid-state sourcecontinuous wavepower combinerpower dividerpower synthesis technology

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Area of Science:

  • Microwave Engineering
  • Electromagnetics
  • RF Power Amplification

Background:

  • Solid-state power sources require efficient multi-way power synthesis.
  • Existing combiners often face limitations in power handling, bandwidth, and insertion loss.

Purpose of the Study:

  • To design and experimentally investigate a compact, high-power, broadband combiner.
  • To achieve efficient power synthesis for sixteen microwave terminals.

Main Methods:

  • Design based on a radial-line waveguide for circumferential symmetry.
  • Simulation and experimental verification of performance metrics.
  • High-power continuous wave (CW) testing.

Main Results:

  • Achieved a relative bandwidth of ~34.6% (2.06-2.93 GHz) with reflection coefficient S1,1 < -20 dB.
  • Demonstrated phase imbalance of ±4.5° and 16-way transmission coefficient around -12.0~-12.3 dB at 2.45 GHz.
  • Verified handling of at least 3.9 kW CW power without active cooling.

Conclusions:

  • The designed radial-line waveguide combiner is suitable for high-power microwave applications.
  • Its compact size, broadband operation, and high power capacity are advantageous for solid-state RF sources.
  • Further cooling measures can significantly enhance its power handling capabilities.