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radial stub microstrip rf choke

thread247-69329

radial stub microstrip rf choke

radial stub microstrip rf choke

(OP)
Can anyone point me to any equations for a radial stub RF choke.  This is the kind that is etched out on a microstrip board.  Is it as simple as a 1/4 wavelength with a 90 degree radius, or is there more to it?

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