| 摘要 |
PROBLEM TO BE SOLVED: To provide an impedance matching device capable of transmitting power input from the transmission side to the reception side without a loss.SOLUTION: The impedance matching device includes: an impedance matching circuit for matching the impedance of a transmission circuit with the impedance of a transmission antenna; an impedance measurement circuit for measuring the impedance of the transmission antenna; a storage unit for storing in advance a control value set based on the locus of impedance variation of the transmission antenna at the change of a coupling state between the transmission antenna and a reception antenna for receiving a radio power signal radiated from the transmission antenna; and a control value output unit for reading out from the storage unit the control value corresponding to the output of the impedance measurement circuit, and reflecting the control value in the impedance matching circuit. |
