On Jun 20, 2:47*pm, Owen Duffy wrote:
"Geoffrey S. Mendelson" wrote :

I have a microwave leakage tester. It is calibrated for 2450 mHz, so
it should be perfect for testing WiFi Network output power. It is
calibrated in mw/cm2 (miliwatts per square centimeter). It is also ham
related as I am limited to 100mw EIRP on the 2.4gHz ham band.


There's probably some standard orientation and test conditions for
these oven leak testers. They're not a "Narda ball" with carefully
designed broadband sensors for all three axes. I'd guess it's
basically a dipole across the end of the business end of the sensor (E
field horizontal, if the meter is laying on the table) with a single
diode and meter. Why do anything more sophisticated.



The shielding in an oven doesn't have to be all that wonderful to meet
the 2mW/cm2 level, either.

For a ballpark, let's say that you've got 1kW spread evenly out on the
inside of the oven. About 30x40x40 cm, or 48,000 cm2. So, in round
numbers 1E6 mW/50E3 cm2 or 20 mW/cm2.. all you need is 10 dB of
attenuation to get down to 2mW/cm2 Obviously, the power density
really isn't even, and you actually worry more about seams, but the
point is that you don't need exotic gaskets and such.


They do make a nifty $100-200 or so WiFi spectrum analyzer which has a
calibrated receiver. And, if you have a wifi card with an exernal
antenna, you can do even better.