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A TE01 mode generator for testing high power transmission devices.

Zewei Wu1, Hao Li, Hua Fu

  • 1School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China.

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|December 3, 2013
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Summary

A new TE01 mode generator for Ka-band was designed and tested. It efficiently converts rectangular waveguide TE10 mode to cylindrical waveguide TE01 mode with high purity, verifying high-power device performance.

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Area of Science:

  • Microwave Engineering
  • Electromagnetics
  • Waveguide Technology

Background:

  • High-power waveguide transmission devices require accurate low-power performance verification.
  • Efficient mode conversion is crucial for signal integrity in millimeter-wave systems.

Purpose of the Study:

  • To design, fabricate, and measure a TE01 mode generator for Ka-band.
  • To verify the performance of high-power waveguide components using low-power measurements.

Main Methods:

  • Designed a generator comprising TE10 to TE20 and TE20 to TE01 rectangular-to-circular mode converters.
  • Analyzed the conversion process and working principles.
  • Fabricated and tested two prototypes using back-to-back transmission measurements.

Main Results:

  • Achieved optimum transmission of 97% with a 1-dB bandwidth from 29.2 GHz to 31.6 GHz.
  • Demonstrated angle-independent transmission, confirming high mode purity.
  • Far-field measurements validated the presence of the TE01 mode.

Conclusions:

  • The proposed TE01 mode generator exhibits high conversion efficiency and mode purity.
  • The device offers a moderate broad bandwidth suitable for Ka-band applications.
  • This generator serves as a valuable tool for verifying high-power waveguide transmission devices.