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A directional coupler is a passive device used in radio technology. The purpose of a directional coupler is to couple electromagnetic power to be used in another circuit.

Q: What is the purpose of a directional coupler?
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A directional coupler is a passive device used in radio technology. The purpose of a directional coupler is to couple electromagnetic power to be used in another circuit.

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They must be powered to boost the signal. If they are not powered they are "passive" and will consume some of the signal.

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Fiber optic couplers can be either active or passive devices. The difference between active and passive couplers is that a passive coupler redistributes the optical signal without optical-to-electrical conversion. Active couplers are electronic devices that split or combine the signal electrically and use fiber optic detectors and sources for input and output.

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50% Coupler :D

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No, there are 6 different tapping mechanisms.

the US Sankey

the European Sankey

the Bass Ale Coupler

the German Coupler

the Guinness Coupler

and the M-System Coupler

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