Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2011-04-19
2011-04-19
Le, Nhan (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S067110, C455S090300, C330S302000, C343S860000
Reexamination Certificate
active
07929987
ABSTRACT:
Disclosed are an apparatus and a method for preventing the degradation of RF performance due to a change in impedance of an antenna in a mobile communication terminal. The mobile communication terminal includes a plurality of impedance matching circuits and a controller of the mobile communication terminal is adapted to measure the reflection voltage of the antenna, select one impedance matching circuit corresponding to the measured reflection voltage, and connected with the antenna through the selected impedance matching circuit. As a result, when the impedance value of the antenna is changed, it is possible to prevent the degradation of performance of the RF module of the mobile communication terminal by using an impedance matching circuit, which can optimize the reflection loss caused by the reflection voltage of the antenna according to a change in impedance value.
REFERENCES:
patent: 6526263 (2003-02-01), Saito
patent: 7071776 (2006-07-01), Forrester et al.
patent: 2008/0129407 (2008-06-01), Matsuno
Kim Chang-Young
Kim Jeong-hun
Lee Sung-Min
Lee Yeon-Joo
Le Nhan
Samsung Electronics Co,. Ltd.
The Farrell Law Firm P.C.
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