Phase shifter including a resonant type switch with a free...

Details Phase shifter including a resonant type switch with a free... Phase shifter including a resonant type switch with a free...

2008-01-11

2010-10-12

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S139000, C333S103000, C333S262000

Reexamination Certificate

active

07812689

ABSTRACT:
Disclosed is a microwave phase shifter including switches each of which utilizes resonance between an off-capacitance of an FET and an inductor connected in parallel with the off-capacitance of the FET, an LPF, and an HPF, a series circuit of an inductor and an MIM capacitor is arranged in parallel with the FET in each portion of the resonance. In a layout of the LC series-connected circuit, though the inductor is of a non-close-packed structure, a metal member or a dielectric material having a relative dielectric constant higher than that of a dielectric substrate is arranged in a free space in a central portion of the inductor.

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Shiban K. Koul and Bharathi Bhat, “Microwave and Milimeter Wave Phase Shifters vol. II Semiconductor and Delay Line Phase Shifters”, pp. 411-413, Artech House, 1991.
Korean Office Action dated Oct. 30, 2009 with Japanese translation and partial English translation thereof.

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