| 摘要 |
PURPOSE: A composite antenna for bi-directional communication is provided to transceive a radio frequency signal by installing a whip antenna and a helical antenna in the composite antenna. CONSTITUTION: A fixed contacting part(10) has a cylindrical guiding hole(10a) inside a composite antenna . A fixed member(11) has guiding holes(11a, 12a) penetrated to the guiding hole(10a). A helical antenna(13) is fixed to a surface of the fixed member(11). One end of the helical antenna(13) is electrically connected to the fixed contacting part(10), and the other end of the helical antenna(13) is electrically connected to a connecting terminal(14). A whip antenna(15) is formed in a certain length according to the particular transceiving frequency, and installed in the guiding holes(10a,11a,12a).
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