摘要:
An antenna having a broad bandwidth and a high radiation efficiency is provided. The antenna includes a conductor, and a dielectric substrate disposed on the conductor. The antenna further includes a slot portion formed on the dielectric substrate, and a cavity formed in the dielectric substrate that corresponds to the slot portion.
摘要:
A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.
摘要:
A bumper beam assembly for a vehicle may include a back beam disposed inside a vehicle bumper, both distal ends of the back beam being oriented in a lateral direction of a main body of the vehicle, crash boxes coupled to one side of the back beam, the crash boxes protruding from the both distal ends of the back beam toward the bumper, and back beam stays integrally coupled to the other side of the back beam, the back beam stays protruding from the both distal ends of the back beam toward an inside of the vehicle, in a direction opposite to a direction in which the crash boxes protrude.
摘要:
The present invention includes a class-E power amplifier, comprising a driver stage (DS) including a first power amplifier with transistors, to which an input signal is inputted; a main stage (MS), including a second power amplifier with transistors, whose input is connected to the output of the DS; and a first LC resonator whose one end is connected to the output of the DS and the other end to the ground as an AC equivalent circuit and a second LC resonator whose one end is connected to the input of the MS and the other end to the ground as an AC equivalent circuit. In accordance with the present invention, as the voltage stress is reduced on the CMOS class-E power amplifier, the application of the high power supply voltage may be allowed and therefore the load impedance may be high while the same efficiency is maintained.
摘要:
A wireless power transmission device, a wireless power transmission control device, and a wireless power transmission method are provided. A coupling frequency between a source resonator and a target resonator is determined. A transmission frequency is controlled such that power is transmitted from the source resonator to the target resonator at the coupling frequency. Therefore, it is possible to maintain a high power transmission efficiency without using an additional matching circuit even when a distance between the source resonator and the target resonator is changed.
摘要:
The present invention relates to a system for transferring wireless power or signal. The system includes a first antenna; and a second antenna which is located from the first antenna at an arbitrary distance and arranged in an arbitrary direction in comparison with the first antenna, wherein respective spherical modes of the first antenna and the second antenna are allowed to have orders which are same as or larger than a predetermined value to thereby transfer wireless power between the first antenna and the second antenna.
摘要:
A bumper beam assembly for a vehicle may include a back beam disposed inside a vehicle bumper, both distal ends of the back beam being oriented in a lateral direction of a main body of the vehicle, crash boxes coupled to one side of the back beam, the crash boxes protruding from the both distal ends of the back beam toward the bumper, and back beam stays integrally coupled to the other side of the back beam, the back beam stays protruding from the both distal ends of the back beam toward an inside of the vehicle, in a direction opposite to a direction in which the crash boxes protrude.
摘要:
A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.
摘要:
A coupling structure of a convergence correction mechanism including a magnet set has a connecting member with an extension part for fitting axially onto one of a cathode ray tube and a neck part of a coil separator on the cathode ray tube and with an insertion part extending axially to a tip end from one axial end of the extension part for receiving the magnet set.
摘要:
The present invention relates to a system for transferring wireless power or signal. The system includes a first antenna; and a second antenna which is located from the first antenna at an arbitrary distance and arranged in an arbitrary direction in comparison with the first antenna, wherein respective spherical modes of the first antenna and the second antenna are allowed to have orders which are same as or larger than a predetermined value to thereby transfer wireless power between the first antenna and the second antenna.