Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2008-09-11
2009-08-18
Jeanglaude, Jean B (Department: 2819)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S108000, C333S118000
Reexamination Certificate
active
07576626
ABSTRACT:
Very small size true directional couplers have a coupling coefficient that is independent on load VSWR. The coupler uses coupled inductors with a compensation circuit including a resistor and a capacitor, or just a capacitor. Wideband operation is suitable for many portable applications such as power detection and control for GSM, DCS-PCS, CDMA/WCDMA, Bluetooth, and WLAN systems.
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Jeanglaude Jean B
Jorgenson Lisa K.
Kubida William J.
STMicroelectronics Ltd.
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