The design and implementation of a novel asymmetric coplanar waveguide (ACPW) band rejection filter using defected ground structure (DGS) is presented. The proposed ACPW DGS technology provides bandgap characteristics with only one cell in the lateral ground plane. The equivalent circuit model of the proposed DGS unit section is described. Measurements of ACPW DGS showed good agreement with simulation and the proposed model.
S. K. Menon, Vasudevan, K., Aanandan, C. K., and Mohanan, P., “Compact asymmetric coplanar waveguide filter”, Electronics Letters, vol. 41, pp. 649–650, 2005.