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  11. A Large-aperture, High-power Ultrawideband Radiation System With Beam Broadening Capacity

A large-aperture, high-power ultrawideband radiation system with beam broadening capacity

Pu-Qing Zhang1, Yan-Zhao Xie1, Shao-Fei Wang1

  • 1State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.

The Review of Scientific Instruments
|July 10, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

This study presents a high-power ultrawideband (UWB) radiation system that broadens its beam. The novel system achieves a wider beam width while maintaining high peak effective potential (rEp), enhancing UWB applications.

Area of Science:

  • Electromagnetics
  • High-Power Systems
  • Signal Processing

Background:

  • High-power ultrawideband (UWB) systems often use multiple modules, leading to narrow beams and limited applications.
  • Existing UWB systems face challenges with aperture size and beam directivity.

Purpose of the Study:

  • To develop a high-power UWB radiation system with beam broadening capabilities.
  • To optimize module excitation delays for enhanced peak effective potential (rEp) and avoid beam splitting.
  • To suppress mutual coupling effects for reliable operation.

Main Methods:

  • A power-law time delay distribution method was proposed for time-domain beam broadening.
  • Simulation studies optimized relative excitation time delays for improved rEp and beam characteristics.

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  • Onboard high-pass filters were employed to mitigate mutual coupling effects.

    • Main Results:

    • The developed 36-module UWB system achieved a maximum rEp of 313.6 kV in high-rEp mode.
    • In beam broadening mode, the H-plane half-peak-power beam width increased from 3.9° to 7.9°.
    • A maximum rEp of 272.9 kV was achieved in beam broadening mode, with adjustable polarization.

    Conclusions:

    • The developed high-power UWB system successfully broadens its beam while maintaining high rEp.
    • The proposed time delay method and filtering techniques effectively address limitations of conventional UWB systems.
    • This system offers enhanced flexibility and applicability in intentional electromagnetic interference fields.