Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Reexamination Certificate
2006-01-10
2006-01-10
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
C333S164000
Reexamination Certificate
active
06985049
ABSTRACT:
A switched coupler type digital phase shifter using a quadrature generator is disclosed. A switched coupler type digital phase shifter includes: a coupling unit for receiving one input signal and generating a first signal and a second signal having 180 degree phase difference based on the received input signal; a quadrature signal generation unit for generating a third signal to a sixth signal having 90 degree phase difference to each other based on the first signal and the second signal outputted from the coupling unit; and a switching unit for selectively outputting one of the third signal to the sixth signal outputted from the quadrate signal generation unit in response to a control signal. The present invention can increased integration of the multi-bit digital phase shifter by implementing multi bit phase variant with only one phase shifter. Also, the insertion loss can be minimized.
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Hyoung Chang Hee
Kang Sung Weon
Kim Yun Tae
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Ham Seungsook
LandOfFree
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