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Why is there a short from center pin to ground on some antennas?

April 26, 2017ANTENNAS center ground Pin short

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Why is there a short from center pin to ground on some antennas?

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Some antennas contain an impedance matching network or transformer, which is a series of windings that short to ground. By measuring resistance between center pin to ground on an antenna 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 antennae operate.