| 摘要 |
PROBLEM TO BE SOLVED: To provide a microwave glass antenna which can receive a circularly polarized radio wave with high efficiency and facilitates turning of an antenna pattern as well. SOLUTION: In the vehicle glass antenna for receiving the circularly polarized radio wave, one of proximate two feeding points is defined as a positive electrode feeding point and the other is defined as a negative electrode feeding point. A first conductive wire extended from the positive electrode feeding point is linearly arranged in a direction retreating from the negative electrode feeding point for the full length of 1/4 wavelength, and a second conductive wire extended from the positive electrode feeding point for the full length of 1/2 wavelength is extended in a direction approaching one side of the negative electrode feeding point, further rectangularly bent near the midway to the negative electrode feeding point and made into an L- shaped wire retreating from the feeding point. Moreover, a phase adjustment conductive wire is extended from the negative electrode feeding point in a direction approaching the second conductive wire, and the total of the length of the second conductive wire from the positive electrode feeding point along the negative electrode feeding point and the length proximate to the phase adjustment wire becomes the 1/4 wavelength. COPYRIGHT: (C)2003,JPO
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