Physical mechanisms and design principles in mode filters for oversized rectangular waveguides

Silvio Ceccuzzi, Cristina Ponti, Gian Luca Ravera, Giuseppe Schettini

Research output: Contribution to journalArticle

2 Citations (Scopus)


Mode filters, based on oversized rectangular waveguides with periodic symmetrical junctions, are addressed through analytical models under a small coupling approximation to explain the physical mechanisms of their behavior, and provide guidelines for their design. In the junctions, which are partially filled with a lossy dielectric, both propagating and evanescent modes play a role. Filter parameters are studied with respect to their impact on the excitation, propagation, and absorption of such modes in the junctions. Particular attention is paid to practical choices a designer has to face in real applications. The performance of single versus multiple lengthwise slots with the same total length is compared, and high-power matters such as voltage and thermal breakdown are discussed. A novel junction with two absorbing layers is proposed to help designers in maximizing absorption, while fulfilling thermal constraints.
Original languageEnglish
Article number7891599
Pages (from-to)2726 - 2733
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number8
Publication statusPublished - 1 Aug 2017
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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