Communications: radio wave antennas – Antennas – With variable reactance for tuning antenna
Reexamination Certificate
2008-08-07
2010-12-28
Phan, Tho G (Department: 2821)
Communications: radio wave antennas
Antennas
With variable reactance for tuning antenna
C343S860000, C330S127000, C330S297000
Reexamination Certificate
active
07859474
ABSTRACT:
The present invention is a tunable multi-element network for providing impedance transformation. The network may include a first switched capacitor power load modulator circuit and a second switched capacitor power load modulator circuit. The network may further include a series inductive component configured for connecting to at least one of the first power load modulator circuit and the second power load modulator circuit. The network may be further configured for connection to a transmit antenna and a power amplifier. The network may be further configured for receiving an arbitrary impedance from the antenna. The network may be further configured for synthesizing an arbitrary capacitive reactance based on a dynamically controllable phase angle between a switch drive signal provided by the network and an incident Radio Frequency (RF) signal. The network may be further configured for matching the antenna impedance to the power amplifier via the arbitrary capacitive reactance.
REFERENCES:
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patent: 4380767 (1983-04-01), Goldstein et al.
patent: 5212491 (1993-05-01), Chin et al.
patent: 6369651 (2002-04-01), Dent
patent: 6621467 (2003-09-01), Marsh
patent: 7202734 (2007-04-01), Raab
patent: 7714649 (2010-05-01), Cripe
Cripe David W.
Patten Scott L.
West James B.
Wolf Jeremiah D.
Barbieri Daniel M.
Evans Matthew J.
Phan Tho G
Rockwell Collins, Inc.
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