IC for 3.5Ghz video link?

[Technoweenie]

I stumbled across this IC on Maxim-IC's site while looking for something else. Wondering if it could be used to make a 3.5Ghz Video link that we have been wanting. Chip is only about $9 one off at DigiKey. Not sure how to interface baseband video into baseband I-Q inputs. Anyone with spare time on their hands??

http://www.maxim-ic.com/datasheet/index.mvp/id/5611

Looks like a 0dBm output and no IF. Evaluation kit shows a reference drawing on the PDF data sheet.

http://datasheets.maxim-ic.com/en/ds/MAX2838EVKIT.pdf

[kenkos68]

I've been looking at this is a well, ever since IBCrazy mentioned that band. There are a few more components needed though. I have some of the engineers where I work looking at it though.

[Mictronics]

As soon as you have I & Q inputs the modulation goes digital.

Btw, a standard VTX can be used as an RF frontend for 3.5GHz. The fundamental TX frequency needs to be changed to get the second harmonic at 3.5GHz.
Then a good bandpass filter, followed by a second gain stage and final low pass filter will do the job.

[Technoweenie]

As soon as you have I & Q inputs the modulation goes digital.

I kind of figured that. A/D conversion would add too much lag time to the video.

Btw, a standard VTX can be used as an RF frontend for 3.5GHz. The fundamental TX frequency needs to be changed to get the second harmonic at 3.5GHz.
Then a good bandpass filter, followed by a second gain stage and final low pass filter will do the job.

I had thought of this too. Wasn't sure how successful I would be using a lower quality Chinese VTX as a start. My thinking was to take the PA section out to get the signal back to 0 dBm. Grab the 2nd harmonic then filter and re-amplify it. Still comes down to lack of time on my end. That's why I like he RF modules . I've played a bit with Flytron's openLRS using the RFM22b module. Keep looking for one similar for 3.5Ghz.

[SecretSpy711]

Stumbled on this very old thread since more and more people are crowding 1.3. Any progress on 3.5? Whoever comes out with a line of video transmitters on the 3.5 GHz band with several channels available will make a lot of money!

[IBCrazy]

I am working on it... I *might* be getting somewhere on this project, but it's quite difficult...

-Alex