Patent ID: 8909166

Claim:
An apparatus for controlling a multi-band antenna in a mobile communication terminal, the apparatus comprising: a modem configured to determine a target frequency band when a change event occurs, and to output a plurality of control signals indicating the target frequency band; at least one circuit configured to combine the plurality of control signals and to output a signal based on the combined control signals; a Radio Frequency (RF) processing unit including a plurality of transmission/reception (TX/RX) paths configured to process TX/RX signals; an antenna unit including an antenna and a switch, the switch being configured to change a resonance frequency of the antenna according to the signal output from the at least one circuit, and the antenna being configured to support multiple bands, and to transmit/receive signals according to the resonance frequency; and an RF switch module configured to connect the antenna to one of the TX/RX paths according to the plurality of control signals, wherein the plurality of control signals is shared between (i) the RF switch module for connecting the antenna to the one of the TX/RX paths and (ii) the switch for changing the resonance frequency of the antenna.