[time-nuts] AM/PM conversion on mixer, DMTD

[Lux, Jim]

On 2/9/21 1:58 AM, Mattia Rizzi wrote:
> Hello!
> I just started a new job with a project involving laser synchronization.
> The idea of my colleague is to use basically DMTD as a phase detector (RF 3
> GHz, IF=10..20MHz), and then digitize the IF with ADCs.
> He is very worried about AM/PM conversion (he's looking for something like
> 0.1degree/dB at 3 GHz), and he told me that the best results were with high
> LO level mixers (he was testing double balanced mixers eval boards, I think
> from minicircuit).
> I had a look at the literature and I found a paper [1] that put an
> upperbound between AM/PM and OIP3. Therefore I am looking for triple
> balanced mixers or DBM with high IP3.
> My question is: in your experience is that all or there's something else?
>
> Thanks!



There are people making triple balanced mixers.
L3Harris Miteq makes them

https://www.markimicrowave.com/home/ was started by Ferenc Marki, who 
developed triple balanced mixers at WJ