| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the null point problem in relatively simple configuration. <P>SOLUTION: A reception part is provided with a reception part 1 and a reception part 2. An amplifier circuit 4 of a transmission part is provided with two voltage sources V1 and V2 different in phase by substantially 180 degrees, and have internal impedances Z1 and Z2 to satisfy Z1≠Z2 and Z1+Z2≈Za(Za; antenna input impedance). An impedance to ground corresponding to each voltage source may be the same value (Z1a). Since the internal impedances of the voltage sources are different from each other, reception signals of two points (unbalance voltages) having different impedances are input to the reception parts 1 and 2, thereby solving the null point problem. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
