| 摘要 |
An AM-FM broadband radio antenna for a vehicle windshield includes first and second conductors supported by the window within its aperture in reversely symmetrical relation, each of the conductors having a force first portion extending longitudinally across the substantial center of the window from a common terminal at the bottom center thereof and a second portion extending transversely away from the first portion and spaced from the top of the aperture by more than 10 centimeters to reduce slot coupling between said conductors and the windshield aperture and thus the impedance reflected to the common terminal. Third and fourth conductors, each tuned to a quarter wavelength of the FM frequency band and preferably stagger tuned, extend from the common terminal longitudinally parallel to the first portions of the first and second conductors and further reduce the impedance in FM reception at the common terminal. In a windshield having a tinted band across the top thereof of greater than 10 centimeters depth, the second portions of the first and second conductors are located just within the bottom of the tinted band.
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