laura halliday wrote:
Yep. It's called an image-reject mixer, and is well-covered in all the
usual references.

Why they are not more widely used in ham radio remains a mystery.

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

The fact that it's difficult to get image rejection better than 40dB
perhaps? Or am I behind the times?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com