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Why does the Power Combiner show a short from center pin to ground?

April 26, 2017center combiner ground Pin power short

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Why does the Power Combiner show a short from center pin to ground?

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Comant Power Combiners used for VOR/LOC/GS contain phasing windings that short to ground in order to achieve proper signal phasing. By measuring resistance between center pin to ground on a combiner that has this configuration, you are measuring DC continuity on the primary side of the winding, and it will appear as a short. However, RF frequencies have a high impedance path to ground, and it is with this signal that these types of combiners operate.