Post subject: Power capability of Lange Couplers Posted:
Thu Apr 10, 2008 1:25 pm
Joined: Thu Apr 10,
2008 1:14 pm
This is a topic I need clarification on
before I can go further with my design. I'm sure there are many variables
and trade-offs to consider, so any solution with these in mind would
be appreciated. For instance, obviously, wider traces increase the power
handling of a microstrip; however, the substrate height would increase
and this should have an effect on the bandwidth capability of the coupler
Also, how is the power distributed in a coupler of this
type anyways? I can't assume the full power will be on a single microstrip
at one time, since this isn't the characteristics of a coupler. In other
words, how does the power get distributed in the different microstrip
regions of the coupler?
Furthermore, what about power capabilities
with full reflection from the load? Once again, I don't believe the
voltage would sum in-phase before being delivered to the isolated port,
but maybe I'm wrong.
Links to white papers would also be appreciated.