Patent ID: 11967750
Assignee: HITACHI KOKUSAI ELECTRIC INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A Wilkinson-type combiner comprising:
a first input terminal and a second input terminal to which RF signals are input;
an output terminal;
a wiring line configured to combine the RF signals input to the first input terminal and the second input terminal and output a combined RF signal to the output terminal;
an isolation unit provided between the first input terminal and the second input terminal and formed by a first isolation resistor, a transformer, and a second isolation resistor connected in series;
a detection circuit connected to a secondary coil of the transformer and configured to detect a current flowing in the secondary coil; and
a determination circuit configured to output a control signal for blocking input of the RF signals to the first input terminal and the second input terminal when the current flowing in the isolation unit detected by the detection circuit is higher than or equal to a predetermined value.