Patent ID: 6963258

Claim:
A shared-antenna device comprising: a shared terminal; a first individual terminal; a first filter connected between the shared terminal and the first individual terminal; a second individual terminal; and a second filter connected between the shared terminal and the second individual terminal, wherein each of the first filter and the second filter include at least two variable-frequency resonator circuits which comprise: a resonator having a grounded end and an ungrounded end; a capacitor electrically connected to the ungrounded end of the resonator; a PIN diode having a first end electrically connected to the ungrounded end of the resonator via the capacitor and a second grounded end; and a resistor connected at a connection point between the PIN diode and the capacitor, wherein a DC voltage for controlling the PIN diode is applied to the connection point between the capacitor and the PIN diode via only the resistor, and wherein the resistances of each resistor in each of the at least two variable-frequency resonator circuits in each of the first filter and the second filter are set such that a DC current consumption of at least one of the at least two variable-frequency resonator circuits is different from a DC current consumption of another of the at least two variable-frequency resonator circuits.