| 摘要 |
There is provided an AM/FM receiving antenna, which is provided at a windowpane of a vehicle, comprising an AM antenna element including an end portion as a power supply point and another end portion forming an open end, and an AM/FM antenna element connected to the AM antenna element via the power supply point, wherein a distance L between the end portion and the another end portion of the AM antenna element, a reduction ratio alpha of a material of the windowpane, a minimum wavelength lambdamin of a receiving FM frequency band, and a maximum wavelength lambdamax of the receiving FM frequency band meet a requirement equation of alpha.lambdamin/2<=L<=alpha.lambdamax/2. The AM/FM receiving antenna can properly achieve the compatibility of receiving sensitivity of the AM and FM electric waves, having a smaller layout space for antenna elements.
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