In reply to Arnaud Kodeck's message of Mon, 25 Mar 2013 10:41:27 +0100: Hi, [snip] >50Hz antenna will make the phone very huge ...
No, you just need to use resonance, though I grant that a resonant circuit at 50 or 60 Hz would probably need large capacitors/coils. Using electronics to mimic a coil using a cap, would probably waste too much energy. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html

