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专利名称：Mobile radio antenna
发明人：Yuda, Naoki,Nakamura, Hiroyuki,Ogawa,
Koichi,Yamabayashi, Masaaki,Otomo,Yasuhiro
申请号：EP040236.8申请日：19970220公开号：EP1503451A1公开日：20050202
专利附图：
摘要：A narrow and light mobile radio antenna that requires convenient supportingmetal fittings provided in a base station is provided. An inner conductor (1b) of a coaxial
feed line (1) extends upward by a length of 1/4 wavelength from the upper end (1c) of anouter conductor (1a). This extended inner conductor (1b) forms an antenna element (3).Outside the coaxial feed line (1), a 1/4-wavelength sleeve-like metal pipe made of brass(2) is located with one end connected to the upper end (1c) of the outer conductor (1a).On a part of the inner surface of the open end of the metal pipe (2), an internal thread(2b) is formed by tapping. In the open end of the metal pipe (2), an insulating spacer (4)having an external thread (4a) formed around its periphery is inserted. In other words,the insulating spacer (4) is located between the inner wall of the metal pipe (2) and theouter conductor (1a) of the coaxial feed line (1). At the lower end (1d) of the coaxial feedline (1), a coaxial connector (5) for connection with an external circuit is provided.
申请人：MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
地址：1006, Oaza-Kadoma Kadoma-shi, Osaka 571-8501 JP
国籍：JP
代理机构：Jeffrey, Philip Michael
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