Good day to all. I am currently designing an H-plane T junction. After reading several references regarding this device, i feel that I understand its functionality. However, I am a bit confused regarding the interpretation of its s-parameters.
Based on what i've read, i should take note of the values of s11, s12,s13 and s22. Is it better to have a -12db value for s11 or should it be as close to zero as possible?
Thanks for the quick reply sir. Thats the confusing part for me. From my understanding, When it is said to be better than -10 db, since the measurements I get are negative, the s parameters should be -9.99db to 0 db. Did I interpret that correctly sir?
I see sir. Its desired for a return loss of 20 db or higher since it means that less power is reflected back on that port. Thanks for your explanations.
Added after 4 hours 23 minutes:
by the way here's what im getting right now with regards to the s parameters
ive seen that increasing the length of the collinear arm affects s33 greatly. any tip to improve this measurements or should I just accept this and fix the problem with tuning screws instead?