STUDIES ON CROSSOVER AND BROADSIDE-COUPLED MICROSTRIP BANDSTOP FILTERS

Two kinds of two-layer microstrip structures, including crossover and broadside-coupled microstrip lines, and their equivalent circuits, are studied based on a quasi-static analyzing method. The shorting vias from the bottom strips to the ground planes are introduced to achieve bandstop. Simulated and measured results show the validity of the proposed structures and their CAD models for the design of bandstop filters. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 228 -231, 2003; Published online in Wiley InterScience (www. interscience.wiley.com). DOI 10.1002/mop.11022