Characterization and applications of a compact CPW defected ground structure

A compact coplanar waveguide (CPW) defected ground structure is investigated. Its frequency characteristics are modeled by full-wave EM simulations. Some applications are investigated, including two electronic bandgap (EBG) devices which are constructed based on a periodical structure of the proposed defected ground without and with loading of lumped-element capacitors. Also, a varactor-tuned defected ground structure of this type has been demonstrated. The theoretical, simulated, and experimental results are presented. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 26–31, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21071