Abstract
This article reports the design of extended stop band miniaturized ultra wide band (UWB) filter based on short-circuited meandered coupled lines. In addition, rectangular-shaped slots are incorporated in the ground plane beneath the input and output feed lines to improve the stop-band rejection. The proposed filter has been realized in microstrip medium having thickness of 0.78 mm and dielectric constant of 2.17. Experimental results of the developed filter validate the results obtained from circuit models and full-wave simulations. Maximum insertion loss of the experimental filter is 1.1 dB. Group delay variation over the pass band of the filter is within ±0.04 ns. Stop band is extended upto 30 GHz with a stop-band rejection of better than 20 dB. Dimensions of the miniaturized experimented filter are 22 × 22 × 0.78 mm3. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:703–705, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27462
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