{"title":"An Inhomogeneously-Loaded Diaphragm in a Microwave Rectangular Waveguide","authors":"Abdulaziz H. Haddab, Edward F. Kuester","doi":"10.1049/mia2.70003","DOIUrl":null,"url":null,"abstract":"<p>This paper demonstrates a method to control the resonant transmission due to Fabry–Perot and Fano resonances through a dielectric-loaded slot in a thick conducting diaphragm embedded in a rectangular waveguide. It is shown that the location of these resonances can be controlled by introducing a gap of a different dielectric constant in the middle of the slot. The two kinds of resonances are adjusted to overlap, forming a complex behaviour with potential applications as a bandpass filter with a relatively narrow notch in the passband response. The theoretical projections are confirmed through both full-wave numerical simulations and experimental measurements. A new fabrication approach was used to overcome the shortcomings in construction that caused some discrepancies with the theory in a previous study.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70003","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iet Microwaves Antennas & Propagation","FirstCategoryId":"94","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/mia2.70003","RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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Abstract
This paper demonstrates a method to control the resonant transmission due to Fabry–Perot and Fano resonances through a dielectric-loaded slot in a thick conducting diaphragm embedded in a rectangular waveguide. It is shown that the location of these resonances can be controlled by introducing a gap of a different dielectric constant in the middle of the slot. The two kinds of resonances are adjusted to overlap, forming a complex behaviour with potential applications as a bandpass filter with a relatively narrow notch in the passband response. The theoretical projections are confirmed through both full-wave numerical simulations and experimental measurements. A new fabrication approach was used to overcome the shortcomings in construction that caused some discrepancies with the theory in a previous study.
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Topics include, but are not limited to:
Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques.
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Radiowave propagation at all frequencies and environments.
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