RF mixer project.

[Boxnut]

Hi people, I have a converter project on the plate and deciding on a mixer design. One catches my eye is a double balanced dual JFET.
this will convert 100 Khz to 50 Mhz up to an IF of 85 Mhz. the LO is no issue at this time. I am open to suggestions here, improvements, part selection etc.
Any help would be hot.

 

[JimB]

Try the SA612A

https://www.nxp.com/docs/en/data-sheet/SA612A.pdf?

I have used them a couple of times and they worked without any fuss.

JimB

 

[RadioRon]

What are your performance goals? Conversion gain, dynamic range etc?
Do you prefer simplicity or do you want to get an education in mixer design? (ie. ok to just buy a double balanced mixer?)

 

[Boxnut]

Try the SA612A

https://www.nxp.com/docs/en/data-sheet/SA612A.pdf?

I have used them a couple of times and they worked without any fuss.

JimB

Hey, thanks for the link, I will see how that fits with my project. From the datasheet, looks good.

 

[Boxnut]

What are your performance goals? Conversion gain, dynamic range etc?
Do you prefer simplicity or do you want to get an education in mixer design? (ie. ok to just buy a double balanced mixer?)

Gain is not so much a problem but looking for best dynamic range, good isolation and low IMD. pre and post amps solve coupling and can help gain.
My template call for a diode ring mixer, modules are good but lossy and matching issues. Modular active would be great, JimB may be on track.

 

[rjenkinsgb]

The SBL-1 or ADE-1 diode ring mixers are well proven devices and have built built in matching transformers.

https://www.minicircuits.com/pdfs/SBL-1+.pdf

https://www.minicircuits.com/pdfs/ADE-1.pdf