Calibration apparatus

A calibration apparatus, in a wireless transmission diversity apparatus comprising first and second transmission portions which transmit the same signals and which calibrates the phases of main signals input to each of the antenna elements of the array antennas of said first and second transmission portions, comprising:

• a calibration signal generation portion for generating calibration signals;
• a signal combining portion for combining the main signals input to each of the antenna elements of said first and second transmission portions with said calibration signals;
• an RF switch, to which are input signals radiated from all the antenna elements of said second transmission portion via a single antenna element of said first transmission portion, to which are input signals radiated from all the antenna elements of said first transmission portion via a single antenna element of said second transmission portion, and which switches and outputs said input signals;
• a receiving portion for demodulating the signals switched by said RF switch;
• a calibration signal detection portion for detecting calibration signals from said demodulated signals;
• a weight generation portion, which uses the calibration signals detected for each antenna element to calculate a calibration weight for each antenna element to control the phase of the main signal input to each of the antenna elements of said first transmission portion and the phase of the main signal input to each of the antenna elements of said second transmission portion;
• and,
• a phase shifter, which executes control of phase shifting of the main signals input to each of the antenna elements of said first and second transmission portions, based on said calculated calibration weights.

A calibration apparatus, which calibrates the phases of main signals received by the antenna elements of an array antenna, comprising:

• a calibration signal generation portion, which generates calibration signals;
• a wireless transmission portion for wirelessly transmitting calibration signals;
• a wireless receiving portion provided for each antenna element, to which the signal received by each antenna element is input;
• a calibration signal detection portion, for detecting the calibration signal from the signals received by each wireless receiving portion;
• a weight generation portion for calculating a calibration weight for each antenna element to control the phase of the main signal received by each antenna element using the detected calibration signals;
• and,
• a phase shifter, which executes phase-shifting control of the main signals received by the antenna elements, based on said calculated calibration weights.

A calibration apparatus, in a wireless apparatus with a diversity configuration having first and second receiving portions which calibrates the phases of main signals received by each of the antenna elements of the array antennas of first and second receiving portions, comprising:

• a calibration signal generation portion for generating calibration signals;
• a wireless transmission portion for wirelessly transmitting calibration signals;
• an RF switch, which switches and inputs the calibration signals to one antenna element of the first receiving portion and one antenna element of the second receiving portion;
• a wireless receiver provided for each antenna elements of the first and second receiving portion, to which the signals received by each of the antenna elements is input:
• a calibration signal detection portion for detecting the calibration signal from the received signals of each wireless receiver;
• a weight generation portion for calculating calibration weights in order to control the phases of the main signals received by each antenna element of the first receiving portion and the phases of the main signals received by each antenna element of the second receiving portion, using the detected calibration signals;
• and,
• a phase shifter, which executes phase-shifting control of the main signals received by the antenna elements of the first and second receiving portions, based on said calculated calibration weights.