Design Procedure for New Compact Waffle-Iron Filters With Transmission Zeros

In this paper, a novel waffle-iron filter with transmission zeros at multiple frequencies, along with its design procedure, is presented. The proposed filter features a high-power behavior and a wide rejected band in a single compact structure by means of a set of transmission zeros that can also be...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2018-12, Vol.66 (12), p.5614-5624
Main Authors: Teberio, Fernando, Percaz, Jon M., Arregui, Ivan, Martin-Iglesias, Petronilo, Lopetegi, Txema, Laso, Miguel A. G., Arnedo, Israel
Format: Article
Language:English
Subjects:
Computer simulation
Doubly corrugated
Filtering theory
Frequency response
high-power
Iron constituents
low-pass filter
Mathematical model
microwave filters
Microwave theory and techniques
Passband
Power transmission lines
Rectangular waveguides
waffle-iron
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Summary:In this paper, a novel waffle-iron filter with transmission zeros at multiple frequencies, along with its design procedure, is presented. The proposed filter features a high-power behavior and a wide rejected band in a single compact structure by means of a set of transmission zeros that can also be placed close to the passband. Its design method rests on a divide-and-rule strategy, where the physical dimensions of the constituent design entities can be easily computed in a very short time. A novel high-power compact waffle-iron filter with transmission zeros at multiple frequencies has been designed as well as several classical waffle-iron filters with transmission zeros at one frequency only, using a detailed step-by-step procedure which avoids the brute-force optimizations needed until now. Multipactor and corona simulations have been conducted proving a high-power handling capability of 1.8 kW and 78.6 W, respectively. A prototype of the novel filter has been fabricated, obtaining a remarkable accordance between the simulated and measured results.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2018.2878198