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    • 6. 发明公开
    • DIELECTRIC ANTENNA
    • DIELEKTRISCHE天线
    • EP1439606A4
    • 2005-07-06
    • EP02718581
    • 2002-04-15
    • TAIYO YUDEN KK
    • IMAIZUMI TATSUYAOKADO HIRONORIYASUDA HISAHIROKOBAYASHI NAOTOAMANO TAKASHIMAEKAWA KAZUYA
    • H01Q1/24H01Q1/38H01Q1/40H01Q5/10H01Q9/04H01Q9/42H01Q21/30H01Q5/01
    • H01Q1/242H01Q1/243H01Q1/38H01Q1/40H01Q5/40H01Q9/0421H01Q9/42H01Q21/30
    • A small-sized dielectric antenna which provides favorable VSWR characteristics in a working frequency band even if placed near a ground conductor pattern when mounted mainly on a circuit board. The power feed point for an antenna element (13) the resonance frequency of which is set at a first frequency and that for an antenna element (14) the resonance frequency of which is set at a second frequency are connected to a power feed external terminal (12b), and an open stub (15) is connected near the power feed point for the antenna element (14), so that a dielectric antenna (10)is constituted. The open stub (15) enables the antenna elements (13, 14) to resonate with an working frequency with their lengths shorter than normal lengths determined by the lengths of the working frequency. Further, even their placement near a ground pattern (3) when mounted on a circuit board (1) enables the enlargement of a frequency band width for favorable VSWR characteristics in a working frequency band
    • 本发明主要涉及即使在安装在电路板上时将其布置在接地图案附近的情况下也能够获得良好的VSWR特性的小型电介质天线。 形成电介质天线,其中谐振频率设定为第一频带中的第一频率的天线元件13的馈电点和谐振频率设定为第二频率的天线元件14的馈电点连接到 外部馈电端子12b和在馈电点附近连接到天线元件14的开路短路15。 开放短截线15被设置成在天线元件13和14的长度短于根据要使用的频率的波长确定的普通长度的同时使每个频率处的谐振。 此外,即使在安装在电路基板1上时配置在接地导体图案3附近的情况下,也能够扩大在使用频带内能获得良好的VSWR特性的频带宽度。