convert lowpass prototype to bandpass
Any references or advices?thanks!
Very sorry that nobody reply
This may help you
http://rfdesign.com/images/archive/0900Cuthbert24.pdf
http://www.ansoft.com/EMpower/Rapid_...ter_Design.pdf
I searched ADS and other places and have no documentation on cross-coupling resonator structures. To convert a lowpass prototype anything is just as any kind of filter but what stops us (me including) is not knowing a lot about cross-coupling resonator structure.
Do you have information on these to share with us?
I dont well understand your meaning about cross-coupling resonator sturcture.If you mean the physical structure,you can see any cross-coupleing filter products. If you mean the coupling coefficient calculation,
I think you can use FEM softwares(HFSS) to calculate,just like common coupling resonators.
What i most care is how to deduce the topology of a crosscoupling filter,and work out the coupling coefficients from the elliptic lowpass prototype filter.