发明申请
- 专利标题: Non-linear Shunt Circuit For Third Order Harmonic Reduction In RF Switches
-
申请号: US15709841申请日: 2017-09-20
-
公开(公告)号: US20190089398A1公开(公告)日: 2019-03-21
- 发明人: Paul D. Hurwitz , Roda Kanawati
- 申请人: Newport Fab, LLC dba Jazz Semiconductor, Inc.
- 主分类号: H04B1/44
- IPC分类号: H04B1/44 ; H04B15/02 ; H04B1/04
摘要:
A non-linear shunt circuit is coupled in a shunt-type configuration (e.g., parallel to an RF switch shunt branch) between a main signal line and ground in an RF circuit, and includes a harmonic cancellation element (HCE) (e.g., back-to-back diodes or diode-connected FETs) configured to cancel third harmonics generated on the main signal line by operation of an RF switch. The RF switch includes a series branch made up of multiple FETs coupled in series in the main signal line between a transmitter/receiver circuit and an antenna. The HCE is coupled to the main signal line either by way of a mid-point node or an input/output terminal of the RF switch's series branch. The non-linear shunt circuit also includes optional protection circuits that provide frequency-independent impedance through the HCE. Various techniques (e.g., active biasing) are optionally utilized to increase effectiveness to a wider range of the switch input power levels.
公开/授权文献
信息查询