Hi
Have you wondered if the LNB from the TV has good receiving performance?
Is it possible to make a better LNB which will be better?
I decided to check it out.
I designed a PCB for the old housing from the TV LNB.
I am using ultra-low noise LNA: PMA2-133LN+.
In one is a 10.4GHz bandpass filter calculated from the website (after taking into account dielectric thickness and dielectric Constant, εr)
Microstrip Filter Design Tool
An online tool for microstrip filter synthesis. Design distributed filters layout and simulate their response.
markimicrowave.com
In the other I used the factory filter for 10.4GHz: BFHKI-1072+
Will the home made LNBs be better than the factory LNB for the TV?
I will try to inform you about it when I build it.