发明名称 |
AN ANTENNA SYSTEM AND A RADIO COMMUNICATION DEVICE INCLUDING AN ANTENNA SYSTEM |
摘要 |
An antenna system including an antenna device and feed device for transmitting and receiving circularly polarised RF waves in a first mode of operation, and of linearly polarised RF waves in a second mode of operation, and a hand-held mobile communication device provided with such an antenna system. A radiating structure (10) including N helical radiating elements (12A-D), being coextending and coaxially arranged on a support structure (11) are fed in order to provide for transmission/reception of circularly polarised RF waves in the first mode of operation. N is an integer greater than one. Further, means (24A-D, 16, 17, 19, 25, 25A) are arranged for essentially uniform excitation of the helical radiating elements (12A-D) in order to provide for transmission/reception of linearly polarised RF waves in the second mode of operation. |
申请公布号 |
WO9960664(A1) |
申请公布日期 |
1999.11.25 |
申请号 |
WO1999SE00839 |
申请日期 |
1999.05.17 |
申请人 |
ALLGON AB;EDVARDSSON, OLLE;BOHANNAN, RICHARD;NOREN, PER;BARONE, GIANNI |
发明人 |
EDVARDSSON, OLLE;BOHANNAN, RICHARD;NOREN, PER;BARONE, GIANNI |
分类号 |
H01Q11/08 |
主分类号 |
H01Q11/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|