Frequency doublers from 12GHz to 24GHz with (at least) 10mW or 100mW output power:

I noticed this parts at the Hamradio Friedrichshafen in 2018. They have a SMA input and a WR42 waveguide output. I put here some screenshots of the input spectrum (Gigatronics 1026) and the output spectrum of each type, measured with an Anritsu MS710C, a high-quality WR42/SMA adapter and the help of the 7470 emulator of KE5FX. As power supply I used a Keithley 2231A-30-3. Voltages are partly written on the parts, partly I had to "guess" and look for some limits where it looks to work stable.
Here is some key data I was able to acquire:
  • Works well in the 1.2cm amateur radio band (e.g. in: 12024MHz, out: 24048MHz).
  • The 10dBm output type requries only two voltages (9V and 5V seems to be ok, ~180mA each).
  • The 20dBm output type requries three voltages (12V/~60mA, 5.7V/~250mA, -5V/~4mA).
  • The input power (saturating the output power) is around 0dBm for both types (a bit more seems to be still ok).
  • The higher harmonics are surprisingly low, if I didn't make a mistake. Need to re-check another time later on...

...more to come!

  • 28GHz full-duplex transverters
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