A novel compact dual-band bandpass filter based on multilayer folded-waveguide (FWG) structure is presented in this article.In this design, slots are used to realize direct coupling between adjacent resonators and apertures are adopted to implement cross coupling between non-adjacent resonators.A new technique of external quality factor of FWG resonator and coupling coefficients between different resonators are studied using full-wave simulator. In order to demonstrate the proposed technique, a four-pole dual-band bandpass filter is designed, fabricated and measured using vector network analyzer. Measurement results which are well agreed with simulation results are presented. Moreover, four-pole substrate integrated folded waveguide SIFW dual-band bandpass filter, using two layers of slotted folded waveguide resonators, is demonstrated. The proposed filter has a compact size and it is excellent candidate for the application of wireless communication systems.
|Number of pages||9|
|Journal||International Journal of RF and Microwave Computer-Aided Engineering|
|Publication status||Published - Nov 2015|
- folded-waveguide resonators
- microwave filters
- dual passband filter