Telecommunications – Transmitter – With variation of antenna impedance or dimension for modulation
Reexamination Certificate
2006-12-08
2010-11-09
Le, Nhan (Department: 2618)
Telecommunications
Transmitter
With variation of antenna impedance or dimension for modulation
C455S125000, C455S193100, C455S282000, C333S017300, C327S074000
Reexamination Certificate
active
07831219
ABSTRACT:
A matching network for matching an antenna to a transmitter or receiver comprises an input port for receiving high-frequency power, an output port and a switchable impedance transformation circuit, which is connected between the input port and the output port. The impedance transformation circuit comprises a CMOS switch in a high-frequency path, which has a first switching state and a second switching state. The impedance transformation circuit is implemented to match a first impedance applied to the output port to a first predetermined impedance in the first switching state, and to match a second impedance applied to the output port to a second predetermined impedance in the second switching state. The inventive matching network allows a particularly good utilization of power provided by a transmitting amplifier or an antenna.
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Sjöblom, Peter and Henrikk Sjöland. “An Adaptive Impedance Tuning CMOS Circuit for ISM 2.4-GHz Band.”IEEE Transactions on Circuit and Systems. vol. 52, No. 6. Jun. 2005. p. 1115-1124. (10 Pages).
Heuermann Holger
Sadeghfam Arash
Infineon - Technologies AG
Le Nhan
Maginot Moore & Beck
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