Patent ID: 8076996

Claim:
A hybrid balun apparatus comprising: a passive unit having a single transformer that generates a pair of reception signals corresponding to an input signal applied to an input port and outputs the pair of reception signals to a pair of output ports, or generates an output signal corresponding to a pair of transmission signals applied to the pair of output ports and outputs the output signal to the input port; first and second active units that generate a pair of compensation reception signals corresponding to the input signal and apply the pair of generated compensation reception signals to the pair of output ports; third and fourth active units that apply the pair of transmission signals to the pair of output ports; and first to fourth switching units that form a reception path along which the input signal is transferred to a pair of reception nodes via the transformer and the first and second active units in a reception mode, and form a transmission path along which the pair of transmission signals, which have been applied to a pair of transmission nodes, are output to the input port via the third and fourth active units and the transformer.