Directional coupler and dual-band transmitter using the same
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United States of America Patent
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Mar 6, 2007
Grant Date -
Oct 27, 2005
app pub date -
Jun 3, 2004
filing date -
Apr 22, 2004
priority date (Note) -
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Abstract
Disclosed herein are a directional coupler which is implemented with strip lines for signal coupling and inter-digital capacitors for phase compensation, and a dual-band transmitter using the same. The directional coupler includes a first transmission device, a first directional coupling device for coupling a part of a signal from the first transmission device, a first inter-digital capacitor connected between the first transmission device and the first directional coupling device, a second transmission device, a second directional coupling device for coupling a part of a signal from the second transmission device, and a second inter-digital capacitor connected between the second transmission device and the second directional coupling device.
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