Apparatus and method for matching antenna impedance in wireless communication system

An apparatus for matching antenna impedance in a wireless communication system, the apparatus comprising:

• a controller configured to determine an approximate reflection coefficient based on an input signal and an output signal of a bidirectional coupler connected to a signal path of an antenna, and determine an antenna impedance matching parameter corresponding to the determined approximate reflection coefficient by using a lookup table;
• and
• an antenna impedance matching unit configured to perform antenna impedance matching based on the antenna impedance matching parameter.

17-30. (canceled)

An apparatus for matching antenna impedance in a wireless communication system, the apparatus comprising:

• a bidirectional coupler connected to a signal path of an antenna;
• and
• a controller configured to determine an approximate reflection coefficient based on output power of the bidirectional coupler in a reverse path and output power of the bidirectional coupler in a forward path of the bidirectional coupler, and perform antenna impedance matching based on the approximate reflection coefficient.

(canceled)