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    • 8. 发明授权
    • Transparent vehicle window antenna
    • 透明车窗天线
    • US5528314A
    • 1996-06-18
    • US445884
    • 1995-05-22
    • Louis L. NagyMark BellingerDouglas C. Martin
    • Louis L. NagyMark BellingerDouglas C. Martin
    • B32B17/10H01Q1/12H01Q13/16H01Q1/32
    • B32B17/10293B32B17/10036B32B17/10174H01Q1/1271H01Q13/16
    • A vehicle antenna comprises a transparent, electrically conducting, film between the inner and outer glass sheets of a vehicle window. The film comprises a horizontally elongate principal element substantially parallel to and spaced from the upper edge portion of the window aperture and having an effective horizontal length of an odd multiple of one quarter of a predetermined wavelength and an impedance matching element. The impedance matching element comprises a main portion having a peripheral edge with a horizontal upper portion spaced below the principal element and a remainder spaced from the remaining edge portion of the window aperture so as to form a slot transmission line having an effective length of one half the wavelength, which is preferably in the commercial FM band. The impedance matching element further comprises a narrow vertical portion connecting the main portion to the principal element, so that the slot transmission line is parasitically coupled to the principal element. The impedance matching element covers substantially the entire main viewing area of the window, especially if its upper edge is overlapped by an upper dark tinted region of the window. Thus, (1) the antenna more commercially acceptable due to the uniform appearance of the window, (2) the antenna has superior AM band gain due to its large size, and (3) the film may be effectively provided with an infrared reflecting substance for internal vehicle temperature reduction.
    • 车辆天线包括在车窗的内玻璃板和外玻璃板之间的透明导电膜。 该膜包括基本上平行于窗口孔的上边缘部分并与其间隔的水平细长的主要元件,并具有预定波长的四分之一的奇数倍的有效水平长度和阻抗匹配元件。 阻抗匹配元件包括具有外围边缘的主体部分,水平上部部分在主要元件下方间隔开,余数与窗口的剩余边缘部分间隔开,以便形成有效长度为一半的狭缝传输线 波长,其优选地在商业FM频带中。 阻抗匹配元件还包括将主要部分连接到主要元件的窄垂直部分,使得狭缝传输线被寄生耦合到主要元件。 阻抗匹配元件基本上覆盖窗口的整个主观看区域,特别是如果其上边缘与窗口的上部暗色区域重叠的话。 因此,(1)由于窗口的均匀外观,天线更可商业上可接受,(2)天线由于其大尺寸而具有优异的AM带增益,(3)该膜可以有效地提供红外反射物质 用于内部车辆温度降低。