RF-OM
Advanced Member level 2
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Your filter is narrow band so there is not so much what you can do.
1.You can increase unloaded resonators Q. The major factors to consider are conductor loss and dielectric loss as well as matching. You can model them numerically which is the best method or try to use simulators. Genesys usually gave me results that were very close to bench test. If you will use Rogers material you may get good results.
2. Next check how much do you lose on connectors. Very often there is about a half of loses. Especially important is to have right footprint and metal go to the very end of the board in connector area. The signal trace must go to the end of the board and central pin must be soldered along all the length.
3. The last point is to try to tune filter into Genesys. Filters are designed by special mathematical algorithms. But not all of them were discovered and you may empirically find better solution. It is possible, I did it many times. It is tedious work, but if you are patient and know filters well you may get much better filter that designed by known algorithm.
By the way, check your filter one more time. It is not well tuned or matched. The left part of pass band in skewed. Otherwise it looks good.
1.You can increase unloaded resonators Q. The major factors to consider are conductor loss and dielectric loss as well as matching. You can model them numerically which is the best method or try to use simulators. Genesys usually gave me results that were very close to bench test. If you will use Rogers material you may get good results.
2. Next check how much do you lose on connectors. Very often there is about a half of loses. Especially important is to have right footprint and metal go to the very end of the board in connector area. The signal trace must go to the end of the board and central pin must be soldered along all the length.
3. The last point is to try to tune filter into Genesys. Filters are designed by special mathematical algorithms. But not all of them were discovered and you may empirically find better solution. It is possible, I did it many times. It is tedious work, but if you are patient and know filters well you may get much better filter that designed by known algorithm.
By the way, check your filter one more time. It is not well tuned or matched. The left part of pass band in skewed. Otherwise it looks good.