| 摘要 |
A helical antenna having a radiator portion (110) formed on a flexible substrate (112) and a rigid substrate (120) with a center feed element (118) electrically connected to the radiator portion (110). The flexible substrate (112) is supported by a support assembly with the radiator portion (110) spaced substantially equidistant from the center feed element (118). The support assembly includes a first non-conductive member (210) mounted to one surface of the rigid substrate (120) at a first location, a second non-conductive member (212) mounted to a second surface at the first location, a third non-conductive member (214) mounted to the one surface at a second location spaced from the first location, and a fourth non-conductive member (216) mounted to the second surface at the second location. A tool (700) for assembling the helical antenna is provided having a base member (710) with a plurality of elongated members (712a, 712b, 712c, 712d) mounted thereon substantially equidistant from each other and extending outwardly therefrom. A plurality of holes (714) formed in the elongated members (712) removably receive pins when in registration with holes (126, 128, 130) in the flexible substrate (112). A rotatable tuning cap (810) for fine tuning the antenna may be used having a plurality of tuning elements (812a, 812b, 812c, 812d) extending axially with the central antenna axis.
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