Need help to modify noise rejection low pass filter

Thread Starter


Joined Aug 16, 2013
Dear Friends,

I have low pass filter in my application to reject the harmonics which produced from the transmitter circuit to the antenna. This filter employ air core inductor which has very small inductance attribute.

1. Is there anyway to remove this inductor with other simpler application inductor/coil?
2. Currently this LPF need to be aligned by finger (adjust the length of the inductors) before it can be used for the application. Is possible for LPF design which no need to be aligned before it can be used for such RF design?

I will post the detailed circuit after I done several research later.
Thanks in advance for your kind help.