Need help with component values for rc & lc filter

[bigjoncoop]

I need to create a RC filter and LC filter for  a 5 volt circuit with around .5amp draw.

 I tried to make an RC filter with a 1k resistor and 330uf cap also tried a 1000uf cap but didnt help clean the 5v signal.

This is to power a 5.8 GHz receiver module. I have only been able to get a clean signal using a linear regulator but using it by itself is not an option since it gets so hot. I'm trying to create a capacitance multiplier using the 5 volts from a buck regulator. And I want to create an LC filter as well but I'm not sure of the value of components I need to use for it or a rc filter

Thx u

[bob91343]

First you need to write a specification for the filter.  What frequencies do you want to reject and what frequencies do you want to pass?

Armed with that information you then can proceed to design a filter.  You will have to decide how much attenuation you want and how much loss you can tolerate.  And, in the process, how many stages of filtering will be required.

There are lots of books on the subject.  It's not something you can shotgun, as you have discovered.  There are also cookbook calculators available online but these may not satisfy your needs.

Maybe a simple RC filter will do, or maybe you will need a five stage job with M derived end sections.  Or a Sallen-Key active filter.