Apparatus and method for measuring voltage standing wave ratio of antenna in wireless communication system

A transmitter in a wireless communication system, the transmitter comprising:

• at least one antenna port configured to transmit and receive a signal;
• an analog filter configured to perform a frequency selection function of the signal;
• and
• a voltage standing wave ratio (VSWR) detector configured to measure a VSWR of the antenna port,
• wherein the VSWR detector:
• detects a forward signal and a reverse signal at an input terminal of the analog filter;
• determines a power value of a forward signal and a power value of a reverse signal at an output terminal of the analog filter by applying characteristic parameters of the analog filter to the detected forward signal and reverse signal;
• and
• determines the VSWR of the antenna port on the basis of the power value of the forward signal and the power value of the reverse signal at the output terminal of the analog filter.

An apparatus for determining characteristic parameters of an analog filter in a wireless communication system, the apparatus comprising:

• a detector configured to detect a signal flowing in an input terminal and an output terminal of the analog filter;
• and
• a controller configured to be combined with the detector,
• wherein the controller:
• measures a first voltage standing wave ratio (VSWR) at the input terminal of the analog filter when a load connected to the output terminal of the analog filter is in a short-circuited state;
• measures a second VSWR at the input terminal of the analog filter when the load connected to the output terminal of the analog filter is in an open state;
• and
• measures a third VSWR at the input terminal of the analog filter when the load connected to the output terminal of the analog filter has a pre-designated resistance value, and
• the characteristic parameters of the analog filter are determined on the basis of the measured first, second, and third VSWRs.