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design a combline bandpass filter using tapped line input

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sandeepsreeman

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plz help

hi frnds i want to design a combline bandpass filter using tapped line input..... the problem coming here is the location of tappedline on the first resonator...from my specs my external quality factor is around 182... by parameter extraction for determination of external quality factor. ..... i changed the tapping position onto the first resonator and calculated the external quality factors for different tap positions...the maximum external quality factor iam getting is only 30... but i want to get 182......so what i have to do????????
plz help in this design
 

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