| 摘要 |
An antenna having an extended electrical length is provided to maintain high radiation efficiency by extending the electrical length of the antenna without increasing a capacitance of the antenna. An antenna having an extended electrical length includes a substrate(120), a conductive radiator(110), a ground stub(150), and a parasitic element(160). The substrate(120) is extended to one direction. The conductive radiator(110) is formed on a plane of the substrate(120) along an extension direction of the substrate(120). The conductive radiator(110) is electrically connected to a feeding element. The conductive radiator(110) has at least one cell(112) which has an outer line of an S-shape. Both ends of the cell(112) are located inside the outer line. The ground stub(150) is formed on the substrate(120) to be electromagnetically coupled to the conductive radiator(110), and electrically connected to a ground plane(140). The parasitic element(160) is formed on the substrate(120) to be electromagnetically coupled to the conductive radiator(110).
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