Re: oh er


Hi Mike and Neil

I think they are using 250mW on 80Ghz into a VDI highpower tripler with an efficiency of 6 to 8% you can achieve the stated 20mW for TX and
for RX they prob used a x2 subharmonic mixer with 120ghz injection and around 3 to 5mw LO.
Like everyone else i am dreaming of ever to own a commercial mixer multiplier for 241Ghz, till then I have to be happy with -30dbm TX power
in a mixer based system or -20dbm if the diode is setup as a multiplier.

Stefan VK4CSD

----- Original Message -----
From: "Neil Smith G4DBN" <>
To: <>
Sent: Sunday, March 14, 2021 8:02 AM
Subject: Re: [UKMicrowaves] oh er

Ah, thanks Mike, I see the W-band mixer diodes are $200 each with min
order $2k per part type. Multipliers look nice, but I guess unfeasibly
expensive for amateurs. 6-8 % efficiency at 20-50 mW in for the doublers
and a little less efficiency for the triplers, but up to 100 mW input.
I guess we will have to continue dreaming about such things unless the
lads have tapped into a secret lode of multiplier goodness.

Neil G4DBN

On 13/03/2021 21:47, Mike Lavelle K6ML wrote:
Virgina Diodes GaAs varactor multipliers

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