relation between compression point, input power and input frequency

[luckyali]

Hi,
I was wondering how does the compression point changes with increasing or decreasing the
a) LO power
b) LO frequency
c) IF frequency....

does it brings any change or for a given mixer the compression point is always fixed at any cost??

 

[kspalla]

compression point depends on LO power, Lower LO power low compression point.
Frequency range or bandwidth depends on how good you match with the mixer operation

 

[luckyali]

1. so can we say that increasing LO power reduces conversion losses.
2. and how about the LO drive effect on port isolation... increasing the LO power will make it better or vice versa

 

[kspalla]

so can we say that increasing LO power reduces conversion losses.
ans: to some extent
2. and how about the LO drive effect on port isolation... increasing the LO power will make it better or vice versa
ans:no, it depends on balance configuration, double triple etc.

 

[ram@419]

hi LO power in mixer is for biasing the diodes inside the mixer and for frequency conversion.when LO power reaches certain level then only frequency conversion starts.

 

[rf1008]

I think LO power has small effect on input compression point in integrated modulator/demodulator,even the discrete mixer. To keep the mixer work well you should keep the Lo in right power range.

 

[burton]

For diode mixer (passive mixer), higher LO power can improve the compression point to some extent. And the LO power is often in the range of 3 to 10dBm.

 

[tony_lth]

You can check Mini-Circuits product, there are +17dBm LO, or even greater.