| 摘要 |
PURPOSE: An impedance matching method of a variable antenna module is provided to improve an impedance matching speed by efficiently performing impedance matching in a variable antenna module. CONSTITUTION: A variable element module(120) comprises a parallel capacitor(121a) connected with an antenna(160) in parallel, a serial capacitor(121b) serially connected, and inductor elements(122a,122b,122c). A reflected power measuring unit(130) measures the intensity of a reflected wave from a reception terminal. An AC to DC converter(140) changes a value measured from the reflected power measuring unit into a DC voltage. A control unit(150) transfers a control signal of variable capacitors to the variable element module based on the measured reflected power value received from a ADC. The antenna transmits and receives signals. |
