Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1993-04-28
1995-06-13
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333161, 333164, H01P 118, H01P 308
Patent
active
054246962
ABSTRACT:
A switched line phase shifter includes at least three transmission lines having different electrical lengths disposed between an input terminal and an output terminal and connectable in parallel to each other, at least three input side FET switches for connecting and disconnecting the input terminal and the input ends of the transmission lines, and at least three output side FET switches for connecting and disconnecting the output terminal and the output ends of the transmission lines. As many signal transmission paths as transmission lines are produced between the input terminal and the output terminal by controlling the input side and the output side FET switches. When one of the signal transmission paths is selected as a reference and a signal is transmitted through the remaining at least two signal transmission paths, at least two different phase shift quantities are obtained in the phase shifter.
REFERENCES:
patent: 5032806 (1991-07-01), Nakahara
patent: 5039873 (1991-08-01), Sasaki
patent: 5063365 (1991-11-01), Cappucci
patent: 5103196 (1992-04-01), Nakano et al.
patent: 5116807 (1992-05-01), Romanofsky et al.
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Heston et al, "100 MHz To 20 GHz Monolithic Single-Pole, Two-, Three-, And Four-Throw GaAs Pin Diode Switches", IEEE International Microwave Symposium Digest, Jun. 1991, pp. 429-432.
Coats et al., "A Low Less Monolithic Five-Bit Pin Diode Phase Shifter." 1990 IEEE MTT-S Digest, pp. 915-918.
Andoh Naoto
Nakahara Kazuhiko
Ham Seungsook
Mitsubishi Denki & Kabushiki Kaisha
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