ADF4351 internal and external voltages.

Discussion about this major DATV Project. See also https://wiki.batc.org.uk/The_Portsdown_Transmitter
G4GUO
Posts: 626
Joined: Tue Feb 16, 2010 12:51 pm

Re: ADF4351 internal and external voltages.

Post by G4GUO » Tue May 08, 2018 7:27 am

Hi John,

I will have a look but I am not hopeful as the problem was that Mini circuits use the thinnest Rogers substrate
available to do the impedance matching which few board houses stock. It worked out at about £100 per
board. It has been suggested I could use FR4 instead and live with the losses. It was also suggested that if
I bought 250 boards I could get the price down but I am not really in the business of selling stuff.

The AVA-183A+ chip from Mini-Cicuits is good from 5 GHz to 18 GHz with a flat gain of 14dB across that range
and a P1b of 19 dBm @10 Ghz falling to 18.7 dBm @ 18 Ghz. The devices cost $9 each.

Useful little gain blocks

- Charles

g8gtz
Posts: 1162
Joined: Wed Apr 07, 2010 6:26 pm

Re: ADF4351 internal and external voltages.

Post by g8gtz » Tue May 08, 2018 7:58 am

Hi Charles,

Not sure quite what spec you want but would a couple of MMICs cut out of a Franco board do the job?

https://www.rf-microwave.com/en/nbp/nmp ... ler/su-02/

These are great valuse of money and have been used all over the place - you just cut them out with a pair of scissors and all the hard work is done!

73
Noel

G4GUO
Posts: 626
Joined: Tue Feb 16, 2010 12:51 pm

Re: ADF4351 internal and external voltages.

Post by G4GUO » Tue May 08, 2018 8:31 am

Hi Noel,

I have some of those but they don't provide enough power to drive the 10 Ghz
double balanced mixers I have. I had thought of trying to use one as an
active mixer that would remove the need to use the diode mixers. I have just
not got around to it yet.

My application is for Metrology which has slightly different requirements to
a receiver in that I need to have a number of phase matched outputs with good
return losses, which means splitters and attenuators which all loose power.

I am slowly collecting eBay bits when I see them at good prices.

- Charles

Nick
Posts: 69
Joined: Sat Oct 03, 2015 10:09 am

Re: ADF4351 internal and external voltages.

Post by Nick » Thu May 10, 2018 12:40 pm

Just received a ADF4351 module as a spare. Pleased to say that it has the correct voltage regulator on it - at least its marked as the correct one...

Got a quick delivery on it from China - just 7 days - sent by air mail. The original one I got took weeks to arrive.

Nick - G4NKV

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