Integrated VSWR detector for monolithic microwave integrated circuits
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United States of America Patent
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May 13, 2014
Grant Date -
Sep 16, 2010
app pub date -
Mar 1, 2010
filing date -
Mar 12, 2009
priority date (Note) -
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Abstract
An integrated RF circuit has an RF input port and an RF output port coupled to an external circuit element having known impedance such as an antenna. An RF circuit element is disposed between the RF input port and the RF output port and has a first input port and a first output port. The RF circuit element affects a signal received at the first input port and provides the affected signal to the first output port. The integrated RF circuit also has a VSWR detector circuit that measures a ratio of a characteristic of RF signals at the first input port and the first output port and that provides an indication of the ratio at a VSWR output port. The measured ratio of the characteristic is affected by an impedance of the coupling thereby providing an indication relating to the coupling.
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