| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency wave glass antenna for a vehicle that improves antenna gain without modifying the shape of a defogger. SOLUTION: In the high-frequency wave glass antenna for the vehicle, a capacitance-coupling conductor 3 is attached to the defogger, an antenna conductor and capacitance-coupling conductor 3 that is the capacitance coupled adjacent to each other. Given by the expression: 0.77*(λ<SB>g</SB>/4)-1.9*(λ<SB>g</SB>/4) is the shortest route length 15 to a grounding side power supply 9, reached through the defogger, at least a part of a defogger side capacitance-coupling portion 3a and capacitance-coupling conductor attachment portion 3b across a capacitance-coupling region 4 through antenna conductor 1, extending from the power supply portion 2 to the antenna conductor capacitance-coupling portion 1a and at least a part of the antenna conductor capacitance-coupling portion 1a with the power supply portion 2 as a starting point. In the expression,λg is defined asλ<SB>g</SB>=λ<SB>0</SB>*k, if the wavelength of frequency of the required frequency band in air is represented byλ<SB>0</SB>and the glass wavelength shortening rate is represented by k (k=0.64). COPYRIGHT: (C)2009,JPO&INPIT
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