 The working principle of a balun transformer is to wrap one or several sets of wires around a high-frequency magnetic core, using different connection methods to achieve impedance transformation and balance imbalance transformation.Balun is a type of transformer that has the function of impedance transformation, and its balanced two output phases are 180°. Therefore, Balun can be used for push-pull amplifiers, broadband antennas, balanced mixers, balanced multipliers and modulators, phase shifters, and any circuit design that requires equal amplitude and phase difference of 180° to be transmitted on two lines.
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