Miniature antenna and electromagnetic field sensing apparatus
First Claim
1. A miniature antenna, comprising:
- a first line;
a first optical switch positioned at one end of the first line;
a second optical switch positioned at the other end of the first line;
a second line connected to the first optical switch;
a third line connected to the second optical switch; and
wherein the first optical switch and the second optical switch are used for sensing a magnetic field when being turned on and used for sensing an electric field when being turned off.
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Abstract
An electromagnetic field sensing apparatus includes an optical modulator, a miniature antenna for sensing the electromagnetic field, a light source, a first optical fiber, an optical detector and a second fiber. The optical modulator can vary the amplitude of a light beam propagating therethrough in response to an electric field intensity. The miniature antenna for sensing the electromagnetic field can sense both the electric field intensity and the magnetic field intensity of an electromagnetic field and apply an electric voltage to the optical modulator in response to the sensed electromagnetic field intensity. The light source is used to generate a light beam, the first optical fiber is used for transmitting the light beam to the modulator, and the second fiber is used for transmitting the light beam from the modulator to the optical detector.
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Citations
13 Claims
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1. A miniature antenna, comprising:
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a first line;
a first optical switch positioned at one end of the first line;
a second optical switch positioned at the other end of the first line;
a second line connected to the first optical switch;
a third line connected to the second optical switch; and
wherein the first optical switch and the second optical switch are used for sensing a magnetic field when being turned on and used for sensing an electric field when being turned off. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electromagnetic field sensing apparatus, comprising:
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a light source for generating a light beam;
an optical modulator for changing a phase of the light beam propagating therethrough in response to an electric field;
an miniature antenna for transforming the sensed electromagnetic field into an electric field and then applying to the optical modulator;
a first optical fiber for transmitting the light beam to the optical modulator;
a second optical fiber connected to the optical modulator; and
an optical detector for transforming the light beam transmitted from the second optical fiber into an electrical signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification