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Substrate integrated waveguide cross-coupling filter with multilayer hexagonal cavity.

B Wu1, Z Q Xu1, J X Liao1

  • 1Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China.

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|January 25, 2014
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Summary
This summary is machine-generated.

Hexagonal cavities offer a flexible and high-performance solution for designing substrate integrated waveguide (SIW) bandpass filters. This study presents novel hexagonal SIW filter designs with cross-coupling topologies fabricated using LTCC technology.

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Area of Science:

  • Electromagnetics
  • Microwave Engineering
  • Materials Science

Background:

  • Substrate Integrated Waveguide (SIW) technology is crucial for miniaturized microwave circuits.
  • Traditional SIW cavities (rectangular, circular) have limitations in design flexibility and performance.
  • Developing novel SIW cavity structures is essential for advanced filter designs.

Purpose of the Study:

  • To introduce and analyze hexagonal cavities for multilayer SIW filters.
  • To leverage the combined benefits of rectangular and circular cavities in a single hexagonal structure.
  • To demonstrate the practical application of hexagonal SIW cavities in bandpass filter design.

Main Methods:

  • Theoretical analysis of hexagonal SIW cavity properties.
  • Design and simulation of three-order and four-order cross-coupling filter topologies.
  • Fabrication of filters using Low Temperature Co-fired Ceramic (LTCC) technology.
  • Experimental validation of designed filters at 10 GHz.

Main Results:

  • Successful implementation of hexagonal SIW cavities for bandpass filters.
  • Achieved a central frequency of 10 GHz and a bandwidth of 6% for all configurations.
  • Demonstrated the feasibility of three-order and four-order cross-coupling topologies using hexagonal cavities.
  • Presented comparable theoretical and experimental results, validating the designs.

Conclusions:

  • Hexagonal SIW cavities provide a versatile and effective solution for bandpass filter design.
  • LTCC technology is suitable for fabricating complex multilayer SIW filters with hexagonal structures.
  • The proposed hexagonal SIW filters meet the specified performance criteria for frequency and bandwidth.