Inline Waveguide Filter With Compact Frequency-Dependent Coupling Producing Two Additional Poles and Three Transmission Zeros

Umar A. Majeed; Muhammad Yameen Sandhu; Adam Lamęcki; Roberto Gómez-García; Michał Mrozowski

doi:10.23919/eumc58039.2023.10290186

Inline Waveguide Filter With Compact Frequency-Dependent Coupling Producing Two Additional Poles and Three Transmission Zeros

Abstract

This work reports a compact frequency-dependent coupling (FDC) structure introduced in a rectangular waveguide, which allows to generate two additional in-band transmission poles and three transmission zeros (TZs). This serves to increase the order/selectivity of the waveguide bandpass filter in a compact inline topology, thus without the need for any additional space/volume or cross coupling. The proposed FDC consists of a partial-height post and a T-shaped post (P&T) that are placed side by side along the width of the waveguide. An equivalent circuit of the P&T FDC is also provided for the filter synthesis process. The TZs can be flexibly placed at either passband side. Electromagnetic-(EM)-simulated results for a fourth-order inline generalized-Chebyshev bandpass filter shaped by two cavity resonators that are coupled through a P&T FDC are presented to validate the RF operational principle of the conceived FDC.

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Authors (5)

Umar A. Majeed
- Sukkur IBA University, Pakistan
Muhammad Yameen Sandhu
- Sukkur IBA University, Pakistan
Adam Lamęcki dr hab. inż.
Roberto Gómez-García prof.
- University of Alcalá, Alcalá de Henares, Hiszpania
Michał Mrozowski prof. dr hab. inż.

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Keywords

—BANDPASS FILTER, COUPLING-MATRIX SYNTHESIS, FREQUENCY-DEPENDENT COUPLING (FDC), INLINE FILTER, MICROWAVE FILTER, TRANSMISSION ZERO (TZ), WAVEGUIDE FILTER

Details

Category:

Conference activity

Type:

publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)

Language:

English

Publication year:

2023

Bibliographic description:

Majeed U. A., Sandhu M. Y., Lamęcki A., Gómez-García R., Mrozowski M.: Inline Waveguide Filter With Compact Frequency-Dependent Coupling Producing Two Additional Poles and Three Transmission Zeros// / : , 2023,

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