Optoelectronic multibit beamsteering switching apparatus

Details Optoelectronic multibit beamsteering switching apparatus Optoelectronic multibit beamsteering switching apparatus

1993-10-29

1995-03-21

Goldstein, Herbert

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359128, 359140, 385 24, H04J 140, G02B 628

Patent

active

054001625

ABSTRACT:
Optoelectronic switching apparatus employing optoelectronic switching devices interconnected by optical media having different delay lengths and an multiport optical coupler. The optoelectronic switching apparatus provides for a multibit true-time-delay beamsteerer for beamsteering phased array antennas. The present invention combines two types of optoelectronic devices, lasers and photodiode switches, using an interconnected passive optical network comprising the optical fibers and the optical coupler. The switches, and input and output signal networks coupled to the respective switches, are controlled using a control signal generator. Using this scheme, any input can be independently selected and a signal can be routed to any output. Furthermore, the product of the total number of different interconnect paths (N.times.M) is provided which provides a greater number of delay lengths than is provided by using only one type of switch (i.e. laser (N) or photodiode (M)) alone. The present invention also provides for improved insertion loss while increasing the number of delay paths.

REFERENCES:
patent: 4953155 (1990-08-01), Tangonan et al.
patent: 5109449 (1992-04-01), Newberg et al.
patent: 5241409 (1993-08-01), Hill et al.

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