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US 5,670,870 AGranted
Electric field sensor capable of reliably measuring an electric field intensity of a signal
AssigneeTokin Corporation
InventorRyoji Muramatsu
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Abstract
An electric field sensor includes an electric field sensor head (13) for varying an intensity of a propagating light beam from a light source (19) in response to an electric field intensity of an input signal received by a reception antenna (11). A photo-electric converter (21) converts the propagating light beam into an output signal. A correcting device (27) compares the output signal with a reference signal to produce and supply a control signal to the photo-electric converter.
Claims4
An electric field sensor comprising:
- a reception antenna for receiving an input signal;
- an electric field sensor head for varying an intensity of a propagating light beam propagating therethrough in response to an electric field intensity of said input signal;
- an incident optical fiber and an outgoing optical fiber both of which are operatively coupled to said electric field sensor head;
- a light source operatively coupled to one end of said incident optical fiber for emitting a light beam to said incident optical fiber as said propagating light beam;
- a photo-electric converter supplied with said propagating light beam delivered from said electric field sensor head through said outgoing optical fiber for converting said propagating light beam into an electric signal, said photo-electric converter outputting an output signal corresponding to said electric signal;
- and
- a correcting device operatively coupled said photo-electric converter for comparing said output signal with a reference signal to correct said electric signal.
4 more elements
Dependencies are inferred from the claim text.