| 摘要 |
PURPOSE:To obtain an antenna of high sensitivity, by connecting a heater antenna to the electric power source through coils, and making the coil inductance and Q of a medium wave band <=2mH and >=10mH, respectively. CONSTITUTION:The electric DC power source 3 is connected to the heater antenna 1 through the coils 2A, 2B, the electric power source is supplied to the heater antenna 1, and also a receiving signal is output through the capacitor 6 and is input to the receiver 5. The capacitor 4 prevents that a noise of the electric power source 3 side goes into the antenna 1 side. The inductance of the coils 2A, 2B and Q of a medium wave band are made <=2mH and >=10mH, respectively, in advance. |
