摘要:
An electromagnetic wave propagation medium 1 extends in the propagation direction of an electromagnetic wave and has an electromagnetic wave propagation space sandwiched between conductors in the direction perpendicular to the electromagnetic wave propagation direction. A base unit 2 and multiple terminals 3 are placed on the electromagnetic wave propagation medium 1. When the position of a terminal 3 is detected, the base unit 2 transmits a position detection signal through the electromagnetic wave propagation medium 1 to the terminal 3. This position detection signal is attenuated more heavily during its propagation through the electromagnetic wave propagation medium 1 than a communication signal for use in normal communication is. The signal strength of the position detection signal drops as it moves away from the base unit 2. Hence the position of each terminal 3 can be detected based on the signal strength of the position detection signal received by each terminal 3.
摘要:
In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying of an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented.
摘要:
A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power.
摘要:
An electromagnetic wave propagation device includes multiple planar propagation media each formed by laminating at least one planar conductor and at least one planar dielectric, multiple transceivers for transmitting and receiving information among electronic apparatuses, and a first interface for transmitting and receiving the electromagnetic wave between the transceivers and the planar propagation media. Planar dielectric spacers are provided for isolating the multiple planar propagation media from one another. The planar propagation medium is disposed to have an overlapped part with at least the other of the planar propagation media so that an obverse face of the medium and a reverse face of the other medium are at least partially overlapped with each other. The planar conductor is provided with an electromagnetic wave linking unit at the overlapped part that transmits and receives the electromagnetic wave between the planar propagation media.
摘要:
The disclosed electromagnetic wave transmission medium prevents electromagnetic leakage during high-power electromagnetic wave transmission. The sheet-form electromagnetic wave transmission medium is configured from a first mesh conductor used in transmission of electromagnetic waves having a first power; and a second mesh conductor used in transmission of electromagnetic waves having a second power. By using two mesh conductors, when said sheet-form electromagnetic wave transmission medium is used, the conduction density of the surface region where electromagnetic waves are extracted to be used for power supply assumes a coarser state than that of the other surface region.
摘要:
In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented.
摘要:
When a wavelength of an electromagnetic wave in an electromagnetic wave propagation space (4) is λ, and n is an integer, in a case where a first conductive layer (2) and a second conductive layer (3) are short-circuited in a first end surface (7b), the more distant an electromagnetic wave output interface (6) is from an electromagnetic wave input interface (5), the closer to a distance of λ/4+n·λ/2 from the first end surface (7b) which is short-circuited the electromagnetic wave output interface is installed, and, in a case where the first conductive layer (2) and the second conductive layer (3) are not short-circuited in the first end surface (7b), the more distant the electromagnetic wave output interface (6) is from the electromagnetic wave input interface (5), the closer to a distance of n·λ/2 from the first end surface (7b) which is not short-circuited the electromagnetic wave output interface is installed.
摘要:
The disclosed electromagnetic wave transmission medium prevents electromagnetic leakage during high-power electromagnetic wave transmission. The sheet-form electromagnetic wave transmission medium is configured from a first mesh conductor used in transmission of electromagnetic waves having a first power; and a second mesh conductor used in transmission of electromagnetic waves having a second power. By using two mesh conductors, when said sheet-form electromagnetic wave transmission medium is used, the conduction density of the surface region where electromagnetic waves are extracted to be used for power supply assumes a coarser state than that of the other surface region.
摘要:
An electromagnetic wave propagation apparatus includes: a planar propagation medium including a planar conductor, a first planar dielectric, a planar mesh conductor, and a second planar dielectric being overlaid on each other in order; at least one electromagnetic wave input port provided for the planar propagation medium; a power supply station that supplies the planar propagation medium with an electromagnetic wave as electric power or information through the electromagnetic wave input port; and at least one power receiving apparatus provided for a second planar dielectric of the planar propagation medium and includes an electromagnetic wave interface and a power receiving circuit. A dielectric board is provided with multiple conductor patterns as the electromagnetic wave interface. At least one connection means is provided between the conductor pattern and the power receiving circuit. At least one short-circuit means between the conductor patterns is provided at an end of the conductor pattern.
摘要:
In an ultra-wideband receiver for receiving discontinuous pulse signals and for demodulating the receive signals, an amplifier amplifies signals received, and a demodulator demodulates the amplified signals. A controller controls the demodulator and the amplifier based on the signals demodulated by the demodulator. The controller sends a signal to the amplifier to activate the amplifier only when the signals are received in order to decrease the power consumption in the amplifier. Further, the demodulator demodulates the amplified signals by generating a plurality of single pulses as template pulses, multiplies the amplified signals with the plurality of signal pulses, and integrates the multiplied signals to obtain demodulated data.