Wave transmission lines and networks – Automatically controlled systems – Impedance matching
Reexamination Certificate
2006-01-24
2006-01-24
Jones, Stephen E. (Department: 2817)
Wave transmission lines and networks
Automatically controlled systems
Impedance matching
C333S100000, C455S063300
Reexamination Certificate
active
06989721
ABSTRACT:
An adaptive controller adaptively controls a plurality of variable high frequency devices. A calculation part calculates a scalar function value by using a signal varied in accordance with impedances of the variable high frequency devices, a reference signal, and a predetermined scalar function. An impedance variation part creates a signal that sequentially varies the impedances of the variable high frequency devices. A determination part determines, when the impedance of one of the variable high frequency devices is varied, whether a direction in which the scalar function value is varied is in a predetermined sloped direction. The impedance variation part includes a first variation part that, when a decision result in the determination part is in the predetermined direction, creates a signal that further varies the impedance of the one of the variable high frequency devices in the predetermined sloped direction. The impedance variation part also includes a second variation part that, when the decision result in the determination part is not in the predetermined sloped direction, creates one of a signal that varies the impedance of the one of the variable high frequency devices in an oppositely sloped direction and a signal that varies the impedance of another one of the variable high frequency devices.
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patent: 2002-118414 (2002-04-01), None
Jun Cheng, et al., Adaptive Beamforming of ESPAR Antenna Based on Steepest Gradient Algorithm. IEICE Trans. Commun. vol.E84-B, No. 7 Jul. 2001.
Hara Shinsuke
Irie Yuji
Nakaya Yuuta
Oishi Yasuyuki
Toda Takeshi
Fujitsu Limited
Jones Stephen E.
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