DESIGN AND OPTIMISATION OF DUAL BAND BELL SHAPED FILTER (DBBSF) USING 45° MILTERED BEND AND BUTTERFLY RADIAL STUB (BRS)

Ahmad, Othman
2018 unpublished
A new type of dual-band bandpass filter (BPF) using microstrip line is presented in this paper. The proposed design consists of coupled-lined filter, butterfly radial stub and 45° miltered bending with new structure called Dual Band Bell Shaped Filter (DBBSF). The proposed DBBSF consists of two fundamental resonant modes with the bandwidth resonant characteristic has been investigated using ADS software. The bandwidths are achieved through optimising the butterfly radial stub for high frequency
more » ... for high frequency passband. In addition, 45° miltered bend improved its insertion loss and return loss level in good agreement. To validate the design and analysis, the DBBSF were fabricated and measured. The DBBSF leads to reduction of overall circuit size which is 2.5mm x 2.5mm. A dual-band response BPF that operates at 2.4 GHz and 5.75 GHz is designed and implement for wireless applications.
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