Re: [DIYbio] Re: Interested in Automated Cell Culturing?

On Sat, Jul 6, 2013 at 6:46 PM, Simon Quellen Field <sfield@scitoys.com> wrote:
> The emitter is inside the microwave oven. Mine has 1400 watts, which seems
> to be plenty of power to boil water.
>
> You need the diode. It converts the gigahertz frequencies into DC that the
> motor can use.
>
> A dipole antenna is simply two conductors whose length determines the
> frequency at which the antenna is resonant. For collecting power, you don't
> actually need to be resonant. You'd collect less power, but there is 1400
> watts to play with, and the motor only needs 50 milliwatts or so.
>
> The microwave oven frequency is 2.45 GHz. A wavelength is thus 12.24
> centimeters. A half-wave dipole would thus be 6.12 centimeters across, with
> each leg being a bit over 3 centimeters long. Cut each lead of the diode
> down to 1.2 inches and you have your rectifying antenna for 2.45 GHz.
>

Aren't you discounting the length of the coils in the motor? We don't
really know how long they are, and they're probably a different gauge,
if the thickness matters (but it sounds like you say the length only
matters).

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