What kind of material will block RF signals?
Aluminium or most other metals can very well block an RF signal, by screening. But the aluminium have to be applied in a correct way. Please, describe your problem in more details.
actually i want my receiver to receive signal from one direction only, therefore i want to block signal from other direction. i need to make some kind like a box which one hole on it so the receiver in the box can only receive signal from one direction only.i cant used antenna because my receiver already have built in antenna..
What kind of receiver do you have? Operating frequency?
what frequecy range are you working at, what attenuation do you need/
mehdi
i'm using FM-RRFQ2, at frequency 433Mhz..the range of the signal is about 75m in building and about 150m at open area..so what kind of modification that i need to do?
It sounds to me you want a directional antenna! A yagi that is optimized for highest possible f/b ratio should work.
But how much front/back ratio do you need?
my receiver already have built in antenna,if i use antenna,the receiver still can receive the signal so it cant be directional anymore..what do u think?
Using an external directional antenna means you must disable the built-in antenna!
/WD
Yes, get a cardboard shoebox and poke a hole in it. The hole should be exactly 1.32cm in diameter. Try that!
Sheesh!