Milt Cram wrote:
[snip]
I don't have the exact numbers at the tip of my tongue, but I
you are interested, I can do a quick MathCad model. A rough estimate is
that a 1 degree phase error (1/60th of a radian) will give an image
rejection of no better than -36dB, and this assumes that the I and Q
channel gains are matched perfectly. A 0.1 degree phase error will
result in an image rejection of the order of -55dB. Likewise, a 1 db
gain error between the two channels, with perfect phase, results in an
image rejection of no better than -38dB.
[snip]
Quite true. If it can be of help, I saved this page from a site of
Advanced Microwave Inc. where the relevant math is laid down.
73 Alberto I2PHD
Alberto I2PHD