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.
Authors
- Umar A. Majeed,
- Muhammad Yameen Sandhu,
- dr hab. inż. Adam Lamęcki link open in new tab ,
- prof. Roberto Gómez-García,
- prof. dr hab. inż. Michał Mrozowski link open in new tab
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.23919/eumc58039.2023.10290186
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2023
