| 摘要 |
A low-cost high performance ultra wideband antenna that can be machine replicated is disclosed. The apparatus includes an inner closed-loop broadband antenna circuit that may be comprised of single or multiple conductive sheets that are electrically connected by conductive or impedance tapered regions that are positioned in an area that does not interfere or interferes minimally with antenna performance. Two continuous sheets of dielectric material cover the back reflector shield area, which leaves only the antenna elements exposed. The dielectric materials are subsequently enclosed by inner and outer conductive shields that are electrically connected to common ground and side shields that may be used to improve directivity. The closed-loop broadband antenna circuit and the feed-point connections may be grounded by a separate path within the device. The resulting stack of materials is easily machine assembled into an antenna apparatus by employing stamping, folding, injection, or other methods.
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