| 摘要 |
A relatively high-impedance FM radio antenna is provided consisting essentially of a circular loop of conductive foil having a discontinuity therein and deposited on one side of a substantially planar, nonconductive substrate. Attached to one end of the loop is a conductive foil impedance element, such as an inductor, for providing impedance matching in order to efficiently transfer the received electrical signals from the high-impedance antenna to a relatively low-impedance radio input circuit. A conductive foil capacitance element is connected between the impedance-matching element and the other end of the loop in order to parallel tune the antenna to the FM radio signal band. The capacitance is formed by depositing spaced interdigitated elongated strips of conductive foil on the substrate, with successive strips alternately attached to the loop end and to the impedance-matching element.
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