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It was my understanding that the advantage of a pi filter would be the symmetrical nature, where signal direction does not matter. and What would be a reason to decide to use non-symmetrica...
#1: Initial revision
by
Andy aka
·
2025-04-15T17:47:36Z (3 days ago)
> _It was my understanding that the advantage of a pi filter would be the symmetrical nature, where signal direction does not matter._ and > _What would be a reason to decide to use non-symmetrical pi filter for initial design?_ An asymmetrical PI filter will be used to match different impedances. I mean, it's already stated that the output isn't exactly 50 Ω so, an asymmetrical filter will be required to match the chip output to the transmission line resistive impedance. Yes, there is a t-line because that's why you match impedances (to prevent reflections). > _Therefore, it seems it would make sense to use symmetrical values as such_ No, that doesn't make sense to me for the reasons above. > _reducing overall thickness of the board prove beneficial to design?_ Unlikely if it's optimal performance is at the nominal thickness.