发明授权
US07202757B2 Compact balun with rejection filter for 802.11a and 802.11b simultaneous operation
有权
紧凑型平衡 - 不平衡转换器,具有用于802.11a和802.11b同时操作的滤波器
- 专利标题: Compact balun with rejection filter for 802.11a and 802.11b simultaneous operation
- 专利标题(中): 紧凑型平衡 - 不平衡转换器,具有用于802.11a和802.11b同时操作的滤波器
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申请号: US11138317申请日: 2005-05-27
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公开(公告)号: US07202757B2公开(公告)日: 2007-04-10
- 发明人: Franco De Flaviis
- 申请人: Franco De Flaviis
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Sterne, Kessler, Goldstein & Fox PLLC
- 主分类号: H01P5/10
- IPC分类号: H01P5/10 ; H01P3/08
摘要:
A balancing/unbalancing (balun) structure includes two input ports are coupled to a differential signal. An isolated port is connected to ground through a matched resistance. An output port is coupled to a single-ended signal corresponding to the differential signal. A plurality of traces connect the two input ports, the load connection port and a tap point to the output port. A f2 rejection filter is wrapped around the balun and includes a first folded element with a transmission length of λ2/4 and connected to the output port. A second folded element has a transmission length of λ2/4 and connected to the tap point. A third folded element connects the tap point to the output port and has a transmission length of λ2/4.
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