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From: Jef Verborgt
Date: 10 Apr 2002
Time: 20:34:52
Remote Name: 205.188.198.183
Hi Sezai, Ferrites loop are compact but not very good at the frequency of 13.56 Mhz. You could easily make a non ferrite antenna with a good sensitivity by making a resonant trap such as the antenna traps used in multiband dipoles. The resonant frequency of such a trap is easily calculated ad adjusted and can be measured precisely with a method that I described about halve a year ago in an article in the ham work shop. Once you got the trap to resonate at the desired frequency you make a very loose coupling via a 1 pf capacitor to your receiver. I would encourage you to have a look at my article to understand my point. Good luck with your project