Transducer

Details Transducer Transducer

1993-04-26

1999-09-07

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359145, H04B 1000

Patent

active

059495642

ABSTRACT:
A transducer for use in a hybrid optical and radio communications system includes a zero electrical power photodetector and a radio antenna. The photodetector is electrically connected to the radio antenna so that, in use, optical signals are received and radio signals are transmitted by the transducer without the use of electrical power. The transducer can thus be remotely sited at locations in communications systems not having a supply of electrical power. In a first embodiment the photodetector includes a zero-bias photodiode, and in a second embodiment the transducer includes a self-biasing photodetector.

REFERENCES:
patent: 4916460 (1990-04-01), Powell
patent: 5239296 (1993-08-01), Jenkins
Pozar et al. "Microstrip Antennas with Integrated Fiber Optic Feeds", Electronics Letters, Oct. 25, 1990, vol. 26, No. 22, pp. 1889-1891.
Wake et al., "Electronics Letters", Jun. 6, 1991, vol. 27, No. 12, entitled "50 GHz InGaAs Edge-Coupled Pin Photodetector".
Wake et al., "Electronics Letters", Oct. 8, 1992, vol. 28, No. 21, entitled "Video Transmission Over a 40GHz Radio-Fibre Link".

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