Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1993-12-01
1995-02-21
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333164, H01P 118, H03H 718
Patent
active
053920104
ABSTRACT:
A switched line type 90.degree. phase shifter includes two single pole double throw switches, a reference transmission line having an electrical length of .alpha. connected between output terminals of the first and the second single pole double throw switches, a phase difference producing transmission line having an electrical length of (90.degree.+.alpha.) at a usage frequency, connected between other output terminals of the first and the second single pole double throw switches, and a phase inverting circuit switchablely connected for serial connection to and between two parts of the reference transmission line, which two parts produce the entirety of the reference transmission line, the one terminal of the first single pole double throw switch is an input terminal of the entire terminal and one terminal of the second single pole double throw switch is an output terminal.
REFERENCES:
patent: 4612520 (1986-09-01), Boire et al.
patent: 5028892 (1991-07-01), Daughters
Robert V. Garver, "Broad-Band Diode Phase Shifters," IEEE Transactions on Microwave Theory and Techniques, vol. 20, No. 5, May 1972, New York, pp. 314-323.
Takatoshi et al, "L-Band Shifter with Switching FET's for Phased Array Antenna," IEEE International Microwave Symposium Digest Jun. 1-5, 1992, Albuquerque, Digest, vol. 3, New York, 1992 pp. 1527-1530.
Liang et al, "High-Temperature Superconductor Resonators and Phase Shifters," IEEE Transactions on Applied Superconductivity, vol. 1, No. 1, Mar. 1991, New York, pp. 58-66.
Ham Seungsook
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
90 degree phase shifter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with 90 degree phase shifter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 90 degree phase shifter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1933703