Design of High-Selective Printed-Ridge Gap Waveguide Filter Using Source–Load and Cross Couplings
Hosna Golboni, Masoud Arezoomand, Abbas Pirhadi, Shahrooz Asadi
Abstract
In this letter, high-selective bandpass filters, in the printed ridge gap waveguide technology, are presented. The filters are designed to perform 4.68% fractional bandwidth at center frequency f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> = 24.78 GHz. In the proposed filters, to obtain high selectivity, a cross-coupling between the nonadjacent resonators and also a coupling between the input and output ports to create an extra pair of transmission zeros in the transfer function of the filters are used. Finally, the filters are fabricated, and their scattering parameters are measured to verify the simulation results.
Topics & Concepts
Band-pass filterTransfer functionBandwidth (computing)Waveguide filterResonatorCoupling (piping)Center frequencyElectronic engineeringPrototype filterScattering parametersWaveguidePhysicsComputer scienceTopology (electrical circuits)EngineeringElectrical engineeringOptoelectronicsTelecommunicationsLow-pass filterMechanical engineeringMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface TechnologiesRadio Frequency Integrated Circuit Design