We introduce a passive filter working in the GHz range, consisting of a parallel-plate waveguide (PPW) filled with a dielectric material and with one of the metallic walls replaced by a metamaterial. The structure of the metamaterial is based on a periodic repetition of a unit cell impressed on one face of a microstrip board and has the effect of introducing three or more electromagnetic bang-gaps (EBGs). The number and positions in frequency of the EBGs depend on the dimensions of the unit cell pattern and on the dielectric material filling the PPW. We consider some variations of the basic structure and choose the one that provides largest EBGs. We perform a parametric study of the frequency properties of the filter in function of the dielectric constant of the material filling the waveguide in view of providing data for design. Results are presented as dispersion diagrams (DDs).
|Number of pages||4|
|Journal||Journal of Electrical and Electronics Engineering|
|Publication status||Published - 2011|
- Electromagnetic band-gap
- Parallel-plate waveguide
- Passive filter