180-degree phase shifter

Wave transmission lines and networks – Coupling networks – Delay lines including long line elements

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333164, H01P 118

Patent

active

056800797

ABSTRACT:
There is provided a small size phase shifter which can shift a phase by 180 degrees wherein the accuracy of preset phase is less dependent on frequency. The phase shifter comprises first to fourth switches provided between a first line pair and a second line pair. By turning the first and second switches ON and the third and fourth switches OFF, a signal inputted to the first line pair is outputted from the second line pair in phase. By turning the first and second switches OFF and the third and fourth switches ON, a signal inputted to the first line pair is outputted from the second line pair out of phase. A small-size phase shifter which has the accuracy of preset phase less dependent on frequency can then be obtained.

REFERENCES:
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patent: 5430401 (1995-07-01), Shtulman
Mikrowellen Magazin "Len Breitbandiger, Planarer 0.degree./180.degree. Phasenschalter", vol. 13, No. 4, 1987 pp. 398-401.
Telecommunications and Radio Engineering "A .pi.-Phase Shifter Based on Microwave Strip Wavguides", pp. 84-85 A. R. Tagilaev, 1992.
M. Aust, et al "GaAs Monolithic Components Development for Q-Band Phased Array Application" TRW Electronics and Technology Division --IEEE MTT Digest 1992, pp. 703-706.
V.E. Dunn, et al "Mmic Phase Shifters and Amplifiers for Millimeter-Wavelength Active Arrays" Ford Microelectronics, Inc. IEEE 1989 pp. 127-130.

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