Magnetic field data modem
First Claim
1. A magnetic field modem comprising:
- a transmitter section configured to modulate data and transmit the data via a modulated magnetic field;
a receiver section configured to receive the modulated magnetic field and demodulate the data; and
a radio frequency shield interposed between the transmitter section and the receiver section to block a radio frequency electromagnetic transmission from the transmitter section to the receiver section while passing the modulated magnetic field from the transmitter section to the receiver section.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic field modem (26) includes an electro-magnetic radiation shielded (90) transmitter section (34) and a receiver section (36). The electro-magnetic radiation shielded (90) transmitter section (34) modulates data and transmits the data via a magnetic field through a radio frequency shield (20). The receiver section (34) receives the magnetic field through the radio frequency shield (20) and demodulates the data. The transmitter section includes an oscillator (40), a modulator (50), an amplifier (70), a magnetic transducer (80), and a non-ferrous magnetic shield (90). The oscillator (40) generates a carrier signal. The modulator (50) connects to the oscillator (40) and modulates the carrier signal with the data. The amplifier (70) connects to the modulator (50) and amplifies the modulated carrier signal. The magnetic transducer (80) connects to the amplifier (70) and converts the modulated carrier signal into a modulated magnetic signal. The non-ferrous magnetic shield (90) shields the magnetic transducer (80) and blocks emitted electro-magnetic radiation.
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Citations
19 Claims
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1. A magnetic field modem comprising:
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a transmitter section configured to modulate data and transmit the data via a modulated magnetic field; a receiver section configured to receive the modulated magnetic field and demodulate the data; and a radio frequency shield interposed between the transmitter section and the receiver section to block a radio frequency electromagnetic transmission from the transmitter section to the receiver section while passing the modulated magnetic field from the transmitter section to the receiver section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A magnetic resonance suite including:
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a room shielded by a radio frequency shield; a magnetic resonance scanner disposed inside the room; and a modem comprising; a radio frequency electromagnetic radiation shielded transmitter section disposed inside the room which modulates data and transmits the data via a modulated magnetic field through the radio frequency shield; and a receiver section disposed outside the room which receives the modulated magnetic field through the radio frequency shield and demodulates the data; wherein the radio frequency shield is interposed between the radio frequency electromagnetic radiation shielded transmitter section and the receiver section to block a radio frequency electromagnetic transmission from the transmitter section to the receiver section while passing the modulated magnetic field from the transmitter section to the receiver section. - View Dependent Claims (15, 16)
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17. A method for communicating data through a radio frequency (RF) shield, the method comprising:
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with a first modem unit on a first side of the RF shield; receiving first data, generating a magnetic field modulated with the first data, transmitting the modulated magnetic field through the RF shield; with a second modem unit on a second side of the RF shield; receiving the modulated magnetic field, demodulating the first data from the received magnetic field to recover the first data, and outputting the recovered first data; wherein the RF shield is interposed between the first modem unit and the second modem unit to block a radio frequency electromagnetic transmission from the first modem unit to the second modem unit while passing the modulated magnetic field from the first modem unit to the second modem unit. - View Dependent Claims (18, 19)
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Specification