Tuneable phase shifter and/or attenuator using...

Details Tuneable phase shifter and/or attenuator using... Tuneable phase shifter and/or attenuator using...

2007-10-16

2007-10-16

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S08100R

Reexamination Certificate

active

10532737

ABSTRACT:
The invention relates to a tuneable phase shifter and/or attenuator comprising a waveguide having a channel and a piece of photo-responsive material (18) disposed within the waveguide along an internal wall of said channel, a light source disposed outside the waveguide to emit light through an aperture (30) of said internal wall to impinge on at least part of an outside surface of said piece of photo-responsive material (18).

REFERENCES:
patent: 2856589 (1958-10-01), Kazan
patent: 4263570 (1981-04-01), De Fonzo et al.
patent: 5099214 (1992-03-01), Rosen et al.
G. Hadjicostas et al., “Optically Controlled Millimeter Wave Phase Shifter in a Metallic Wafeguide”, IEEE MTT-S Digest, 1987, pp. 657-660 (XP-00268833).
V. Lubecke, et al., “Micromachining for Terahertz Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 46, No. 11, Nov. 1998, pp. 1821-1831.
M. Yap, et al., “Silicon Macromachined Waveguides for Millimeter and Submillimeter Wavelengths”, Symposium Proceedings: Third International Symposium on Space Terahertz Technology, Ann Arbor, Michigan, Mar. 1992, pp. 316-323.

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