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Power Capability of Lange Couplers - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


rimorgan
Post subject: Power capability of Lange Couplers Posted: Thu Apr 10, 2008 1:25 pm

Lieutenant

Joined: Thu Apr 10, 2008 1:14 pm
Posts: 1
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.







Posted  11/12/2012

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