ANTENNA FOR A MOBILE COMMUNICATION DEVICE

摘要

PURPOSE: An antenna for a mobile communication device is provided to improve receiving efficiency by controlling matching conditions through a varactor diode. CONSTITUTION: An antenna pole(10) is electrically connected to the main board of a mobile communication terminal through a transmission line. A plurality of matching circuits(16) are arranged in the transmission line. The matching circuit matches the impedance between the antenna pole and the main board of the mobile communication terminal. The varactor diode(18) is arranged between the matching circuits. An VCC controller(20) controls the varactor diode. A DC block(24) is arranged in both ends of the varactor diode.