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    • 6. 发明专利
    • Spiral antenna
    • 螺旋天线
    • JP2014027392A
    • 2014-02-06
    • JP2012164567
    • 2012-07-25
    • Toshiba Corp株式会社東芝
    • TANABE MASAHIRO
    • H01Q9/27H01Q1/36
    • H01Q9/27H01Q1/36
    • PROBLEM TO BE SOLVED: To provide a spiral antenna capable of achieving size reduction and good antenna characteristics in a low-range frequency band.SOLUTION: The spiral antenna includes spiral arms 11, 12 and connection sections 13, 14 adjacent to terminal sections of the spiral arms 11, 12 and connected with the spiral arms 11, 12 and is structured to be folded at the terminals of the spiral arms 11, 12, thereby to suppress a reflection wave at the terminal sections of the spiral arms 11, 12, improve antenna characteristics (gain, axial ratio) in a low-range frequency band with a simple structure, and reduce the size of the spiral antenna.
    • 要解决的问题:提供一种能够在低范围频带中实现尺寸减小和良好的天线特性的螺旋天线。解决方案:螺旋天线包括螺旋臂11,12和与其相邻的连接部分13,14 螺旋臂11,12与螺旋臂11,12连接,构造为在螺旋臂11,12的端子处折叠,从而抑制在螺旋臂11,12的端部处的反射波,从而改善 天线特性(增益,轴比)在低频带中结构简单,减小了螺旋天线的尺寸。