microstrip discontinuity

[okik]

How can I compensate T-junction discontinuity? I need advice on how to do it easily and especially correctly. Because my designed filter not working properly due to T-junction discontinuity.
Thanks for any advice

 

[Yigit Yalcinkaya]

View attachment 189353

View attachment 189354
for calculation to microstrip form --> substrate - Er=2.33 and h=1.27 mm, Zhigh=155.9, Zlow=40.73, cutoff freq=694MHz

I wonder about your Schema. Which do you use design program for this schema? I saw the CST result. But your schema offers every notch branch's frequency. Is there a filter design program that shows this automatically?

 

[okik]

I wonder about your Schema. Which do you use design program for this schema? I saw the CST result. But your schema offers every notch branch's frequency. Is there a filter design program that shows this automatically?

Designed scheme is from software Nuhertz Filter Solutions