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.

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.

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.

Abstract: The present optically modulated scatterer comprises a substrate, an antenna positioned on the substrate, an optical switch connected to the antenna, and an optical waveguide connected to the optical switch. The antenna includes a first conductive line and a second conductive line, the optical switch electrically connects the first conductive line and the second conductive line, and the optical waveguide can transmit an optical modulating signal to the optical switch. In addition, the antenna can be a loop-shaped antenna with two free ends, and the optical switch electrically connects the two free ends. The optically modulated scatter array of the present invention comprises a first substrate and a plurality of optically modulated scatterers positioned on the surface of the first substrate in a one-dimensional or a two-dimensional array manner.

Abstract: The present electromagnetic signal sensing system includes a modulating circuit for generating an electrical modulating signal, a laser electrically connected to the modulating circuit, an optically modulated scatterer coupled with the laser, a receiving antenna, a synchronous detection circuit electrically connected to the receiving antenna and a signal processing circuit electrically connected to the synchronous detection circuit. The laser generates an optical modulating signal based on the electrical modulating signal for modulating the optically modulated scatterer to generate a modulated scattering signal. The receiving antenna receives the modulated scattering signal, the synchronous detection circuit generates an in-phase signal and a quadrature-phase signal with a phase offset of 90 degrees from the electrical modulating signal, and the signal processing circuit calculates the amplitude and phase of the electromagnetic signal from the in-phase signal and the quadrature-phase signal.

Abstract: The present electromagnetic signal sensing system includes a modulating circuit for generating an electrical modulating signal, a laser electrically connected to the modulating circuit, an optically modulated scatterer coupled with the laser, a receiving antenna, a synchronous detection circuit electrically connected to the receiving antenna and a signal processing circuit electrically connected to the synchronous detection circuit. The laser generates an optical modulating signal based on the electrical modulating signal for modulating the optically modulated scatterer to generate a modulated scattering signal. The receiving antenna receives the modulated scattering signal, the synchronous detection circuit generates an in-phase signal and a quadrature-phase signal with a phase offset of 90 degrees from the electrical modulating signal, and the signal processing circuit calculates the amplitude and phase of the electromagnetic signal from the in-phase signal and the quadrature-phase signal.

Abstract: The present optically modulated scatterer comprises a substrate, an antenna positioned on the substrate, an optical switch connected to the antenna, and an optical waveguide connected to the optical switch. The antenna includes a first conductive line and a second conductive line, the optical switch electrically connects the first conductive line and the second conductive line, and the optical waveguide can transmit an optical modulating signal to the optical switch. In addition, the antenna can be a loop-shaped antenna with two free ends, and the optical switch electrically connects the two free ends. The optically modulated scatter array of the present invention comprises a first substrate and a plurality of optically modulated scatterers positioned on the surface of the first substrate in a one-dimensional or a two-dimensional array manner.

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.