Abstract
AbstractPhotonic bandgap (PBG) structures with slots etched in their ground plane have been proposed recently as a good choice for the design of printed microwave filters, absorbers, reflectors, and antennas for many modern applications. In the present work, a microstrip PBG filter was designed to operate as a multifrequency bandstop filter. The conventional profile of the slot patterns used in previous works was either discrete (with circles), continuous sinusoidal, or triangular. These geometries guide the structure to operate as a single wideband filter. In this work, a different periodic pattern of slots is introduced. The configuration is designed using the fractal technique. The self‐similarity of the fractal geometry is found to excite the PBG structure to act as a wide stop‐band filter in more than one frequency region. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 273–276, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20443
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