On 3/25/2013 6:15 PM, [email protected] wrote:
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
I would confirm this. The "inductor" current in these circuits is
supplied by an amplifier, from the circuit's power supply. This is why
you will never find a power supply inductor (power inductor) implemented
this way.
Regarding the charging, if you shift the source band up-spectrum to
light frequencies, then all that's needed is a photocell and a small IC
for voltage boost. Probably get more charge too, even if the phone is
usually in the dark...
Ol' Bab
