Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate
2006-05-30
2006-05-30
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
C455S562100
Reexamination Certificate
active
07053631
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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patent: 4110685 (1978-08-01), Leenerts
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patent: 4584650 (1986-04-01), Kozuch
patent: 6029051 (2000-02-01), Osterberg et al.
patent: 6289216 (2001-09-01), Koh et al.
patent: 2002/0113600 (2002-08-01), Swank, II
Evolium S.A.S.
Nguyen Vincent Q.
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