Apparatus for connecting a radiotelephone to an external antenna,申请号US19960682158-传众专利搜索

Apparatus for connecting a radiotelephone to an external antenna

申请公布号：US5822705(A)

申请号：US19960682158

申请日期：1996.07.17

申请公布日期：1998.10.13

申请人：

NOKIA MOBILE PHONES, LTD.

发明人：LEHTOLA, ANTERO

分类号：H01Q1/24;(IPC1-7):H04B1/38

主分类号：H01Q1/24

摘要：The present invention concerns an apparatus for connecting a radio frequency signal between the integral antenna of the radio communication device and the external antenna, preferably a car antenna. The apparatus in accordance with the invention comprises a resonant element, preferably a helical coil conductor having an electromagnetic coupling with the antenna of the radio communication device and its first connection point being coupled capacitatively with the ground plane of the radio communication device and its second connection point being connected with a coaxial conductor to said external antenna. The apparatus in accordance with the invention further comprises a matching element, preferably a helical coil conductor coupled electromagnetically to said antenna and said resonant element.