Power capability of Lange Couplers - RF Cafe Forums
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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 (true?)
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. Thank you.