基本信息:
- 专利标题:
- 申请号:AT03252495 申请日:2003-04-17
- 公开(公告)号:AT398347T 公开(公告)日:2008-07-15
- 发明人: YANG XIAO HUI , FUSS ARTHUR
- 申请人: YANG XIAO HUI , FUSS ARTHUR
- 专利权人: YANG XIAO HUI,FUSS ARTHUR
- 当前专利权人: YANG XIAO HUI,FUSS ARTHUR
- 优先权: US37492002 2002-04-22; US37623602 2002-04-26; US23522502 2002-09-04
- 主分类号: H01Q7/00
- IPC分类号: H01Q7/00 ; G08B13/24 ; H01Q1/22 ; H01Q7/08
摘要:
An antenna system for an electronic article surveillance system comprises a first antenna and a second antenna, the first antenna and the second antenna mounted for use in an substantially overlapping manner (14), the first antenna configured as a loop, the second antenna configured in a "figure-8"; and a control circuit for alternatively activating the first and second antennas. The first and second antennas each operate as a transmit and receive antenna. The control circuit further comprises a switch to selectively enable operation of one of the antennas when the other is open circuit. The loop antenna substantially detects markers oriented substantially perpendicular to an elongated axis (16) when entering into a surveillance area. The "figure-8" antenna substantially detects markers oriented substantially parallel to the elongated axis (16) when entering into a surveillance area.
信息查询:
EspacenetIPC结构图谱:
H | 电学 |
--H01 | 基本电气元件 |
----H01Q | 天线,即无线电天线(微波加热用辐射器或天线入H05B6/72) |
------H01Q7/00 | 环形天线,围绕环的电流分布基本上是均匀的,其方向辐射图形位于与环平面相垂直的平面内 |