Title:
METHOD OF AUTOMATIC ADJUSTMENT OF A TUNABLE IMPEDANCE MATCHING CIRCUIT, AND AUTOMATIC TUNING SYSTEM USING THIS METHOD
Document Type and Number:
WIPO Patent Application WO/2018/002745
Kind Code:
A8
Abstract:
The invention relates to a method of automatic adjustment of a single-input-port and single-output-port tunable matching circuit, for instance a single-input-port and single-output- port tunable matching circuit coupled to an antenna of a radio transceiver. The invention also relates to an automatic tuning system using this method. The reactance of each adjustable impedance device of the tunable matching circuit is determined by at least one tuning control signal. In addition to the begin symbol (21) and the end symbol (26), a flowchart of a tuning sequence comprises: a process "generating initial values of the tuning control signals" (23), which uses an open-loop control scheme using one or more real quantities depending on an impedance seen by the target port; and a process "generating subsequent values of the tuning control signals" (24), which uses a closed-loop control scheme and an extremum-seeking control algorithm.
Inventors:
BROYDE FREDERIC (FR)
CLAVELIER EVELYNE (FR)
CLAVELIER EVELYNE (FR)
Application Number:
PCT/IB2017/053267
Publication Date:
July 12, 2018
Filing Date:
June 02, 2017
Export Citation:
Assignee:
TEKCEM (FR)
International Classes:
H03H7/40; H04B1/04; H04B1/18
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