Novel wideband photonic bandgap microstrip structures

Novel wide rejected band devices are obtained using chirping techniques in one-dimensional photonic bandgap microstrip structures with the ground plan e etched following a periodic pattern. Full-wave electromagnetic simulation s and measurements are provided to compare the frequency responses of struc tures with a linearly varying period (chirped devices) and those of structu res with a constant period (nonchirped or conventional devices), showing th e increased bandwidth obtained. (C) 2000 John Wiley & Sons, Inc.