[BC] NRSC - Harmonics above 5 MHz

[Mark Humphrey]

It's quite easy to homebrew a small loop antenna that will generate a
standard H field in the MW and HF bands.  This NIST paper explains the
design beginning on page 3; I think it's the same type of antenna
Potomac employs to calibrate FIMs:

http://ts.nist.gov/MeasurementServices/Calibrations/upload/im-34-4b.pdf

If you can find a sensitive thermocouple RF ammeter (for example 100
mA) you should be able to drive the loop to full-scale with an
ordinary +20 dBm output signal generator such as an HP 8640B.  I'm in
the process of making one of these, but still need to design a
matching network that provides acceptable response across the band.

Mark

On 2/10/07, Harold Hallikainen <harold at hallikainen.com> wrote:
> One way to get around the requirement for a calibrated antenna and
> receiver (or RF voltmeter) is to use a reference field and compare to it.
> I always thought this was an interesting device:
> http://www.credencetech.com/products/product.php?productId=ERS%20EMC10.3G
>