VSWR-measurement with error compensation
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United States of America Patent
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May 30, 2006
Grant Date -
Jul 8, 2004
app pub date -
Dec 8, 2003
filing date -
Dec 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and base station apparatus are presented for calculating the Voltage Standing Wave Ratio of a radio frequency transmission line which is coupled with a first and a second directional coupler, the first directional coupler developing a first voltage indicative of the forward power propagating along the radio frequency transmission line in a first direction, the second directional coupler developing a second voltage indicative of a reflected power propagating along the radio frequency transmission line in a reverse direction. The method includes, in a second stage of installation, collecting values of the first and the second voltage, connecting at least one correction value with the second voltage to form a corrected second voltage, and forming the Voltage Standing Wave Ratio on the basis of the first voltage and the corrected second voltage. The correction value is obtained in a calibration process in a first stage of installation.
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