Abstract
In this paper a narrow band band-pass filter with a wide upper stopband using short-circuited microstrip coupled-lines is presented. This filter can be implemented easily by using single layer microstrip. The equivalent transmission line circuit model is used to achieve a useful analysis of the proposed filter performances. To validate the design and analysis, the band-pass filter is designed, simulated using the full-wave EM simulator ADS and fabricated on a 31mil thick RT/Duorid 5880 substrate with a relative dielectric constant 2.2 and loss tangent of 0.0009. The measured results show that it can operate at 2.41GHz and up to the 19.2GHz 20dB stopband. The filter is evaluated by experiment and simulation with a good agreement.
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