| 摘要 |
PURPOSE:Not to only reduce a multipath noise but also make the whole antenna part small-sized, by arranging plural antenna elements at a prescribed angle. CONSTITUTION:The peak directions of distribution of directional patterns of the loop antennas 1a, 1b are arranged so as to be angled equally, for instance, orthogonally. Both the outputs of these loop antennas 1a, 1b are provided to the high speed switching circuit 12 through the respective impedance conversion and balanced-to-unbalanced converting circuits 10a, 10b, and the lines 11a, 11b, respectively. The circuit 12 amplifies two input signals alternatively, and switches and outputs it to its output terminal. This switching operation is executed by alternatively changing the two parallel connecting amplification to an operation state or a high amplification factor state. The output terminal of the circuit 12 is connected to the input terminal of the front end part 14 of the FM tuner 13. |
