| 摘要 |
PURPOSE:To improve the sound quality of reception, by providing an antenna on a front glass of a car to perform space diversity reception. CONSTITUTION:A front glass 1 of a car is provided with the 1st antenna 2 along the upper side and the 2nd antenna 3 along the lower side, and both antennas are connected to an antenna selection switch circuit 11. The circuit 11 is automatically switched with a reception level detection signal and an FM multi-path distortion detection signal (to detect distortion of a stereo pilot signal of 19kHz) to select the antenna for better reception. |
