| 摘要 |
PURPOSE: A multi resonance tunable antenna is provided to reduce the size of an antenna and to be used in a wide frequency band. CONSTITUTION: A filter(301) selects a receiving signal inputted to a main line. The main line is branched to a first branch line(L1) and a second branch line(L2) at a branch point(BN). The first branch line and the second branch line determine a resonance point by combining a first capacitor and a second capacitor. One terminal of the first capacitor is connected to the first branch line. One terminal of the second capacitor is connected to the second branch line. |
