41 results about "Radiation frequency" patented technology

A measuring device (10) for determining the position of a component (226) in a system (200) comprises a radiation generator (24) configured to generate a measuring radiation (22e) with at least two discrete radiation frequencies (36; 136), which are selected comb frequencies (38) of a frequency comb structure (37), wherein the frequency comb structure is defined by at least two comb parameters, of which the first comb parameter comprises a uniform frequency spacing (42) of the comb frequencies and the second comb parameter comprises a frequency offset of the frequency comb structure from a reference frequency, an optical resonator (16) comprising resonator frequencies (17) and a measuring target (14) assigned to the component and configured to measure distances by irradiating the measuring target with the measuring radiation, and a coupling module (32),which is configured to couple the at least two discrete radiation frequencies to two of the resonator frequencies and for this purpose comprises a radiation detector (50) for detecting a radiation sample (22r) of the measuring radiation branched off from the optical resonator and a control device (54), wherein the control device (54) is configured to generate a control signal (56) for the radiation generator from the radiation sample detected by the radiation detector, which control signal comprises a specification (42v) for at least one of the comb parameters.

The utility model provides a high-performance high-frequency antenna and a mobile terminal device, the high-performance high-frequency antenna comprises a first radiation branch knot and a second radiation branch knot, the second radiation branch knot and the first radiation branch knot are mutually coupled and connected, the second radiation branch knot is suspended beside the first radiation branch knot, and the second radiation branch knot is suspended beside the first radiation branch knot. The second radiation branch knot is coupled with the first radiation branch knot in a suspension manner, the second radiation branch knot comprises a first suspension branch knot and a second suspension branch knot, the first suspension branch knot is perpendicular to the second suspension branch knot, and the first suspension branch knot is coupled with the first radiation branch knot to form a first gap; the second suspension branch knot and the first radiation branch knot are coupled to form a second gap. The high-performance high-frequency antenna not only can simplify the overall routing design of the antenna, but also can effectively broaden the overall radiation frequency band of the antenna and effectively improve the radiation efficiency of the antenna.

The application discloses a PET plastic modification method and application of modified PET plastic in asphalt modification, and relates to the technical field of road engineering materials.The PET modification method comprises the following steps: (1) PET is subjected to microwave radiation treatment to realize PET depolymerization, and PET oligomer is obtained; and (2) soybean oil is subjected to grafting reaction with the PET oligomer to obtain grafted modified PET; the microwave radiation treatment is carried out under normal pressure, the radiation frequency is 2.45 GHz, and the radiation temperature is 200-300 DEG C.The PET is subjected to depolymerization by using the microwave depolymerization technology, the efficient depolymerization of the PET can be realized under normal pressure in a very short time of 2-10 min, then the PET after the microwave depolymerization is subjected to grafting modification by using soybean oil as raw material, the waste soybean oil raw material can be used, the resource utilization of the waste soybean oil raw material is realized, and the problems of phase separation and performance degradation of the PET modified asphalt material are solved.

The application provides an implantable medical device, which comprises a metal shell, a circuit board, an antenna and at least one connecting structure. The connecting structure connects a radio frequency ground of the circuit board and a connecting point of the metal shell to change electromagnetic characteristics of the metal shell, the distance between the connecting point and an antenna hole is m, the extension path length of the connecting structure between the connecting point and the radio frequency ground is n, the working wavelength of the antenna is lambda, and m+n<=0.2lambda, so that the radiation frequency of the metal shell is far away from the working frequency of the antenna, the radiation of the metal shell to the antenna is reduced, the loss of the electromagnetic wave energy radiated by the metal shell to the antenna is reduced, and the radiation efficiency of the antenna is improved.

An apparatus and method for improving microcirculation by suppressing and cancelling the negative effects of electromagnetic radiation from cellular phones and computers connected to wireless networks on microcirculation. The apparatus generates frequencies that are synchronized and in opposed amplitudes to the detected electromagnetic radiation frequencies, thereby suppressing and cancelling the negative effects of the electromagnetic radiation frequencies on microcirculation.

The invention discloses a packaging shielding structure design method and a semiconductor packaging shielding structure, and the design method comprises the steps: building a simulation model of a patch antenna, and simulating a field intensity radiation pattern of the simulation model to obtain a radiation frequency point of the patch antenna; the current distribution diagram of the inner surface of the metal cover at the radiation frequency point is observed, so that an auxiliary groove is formed to form a new patch antenna; establishing a new simulation model of the patch antenna and simulating a field intensity radiation pattern of the patch antenna to obtain a radiation frequency point of the new patch antenna; judging whether the radiation frequency point of the patch antenna is far away from the main frequency of the semiconductor component, if so, determining the position and size of the current auxiliary slot as the design result output, and if not, adjusting the position and size of the auxiliary slot, or adding a new auxiliary slot. And repeating the simulation steps until the radiation frequency point of the patch antenna is far away from the main frequency of the semiconductor assembly. The electromagnetic radiation of the semiconductor packaging shielding structure is reduced on the premise of low cost, and the EMC performance is optimized.

The invention provides a terahertz functional device based on a silicon-based all-dielectric, and belongs to the field of terahertz communication. The device aims to realize efficient electromagnetic wave active radiation through a controllable leaky-wave mechanism, so that the terahertz device is called a leaky-wave antenna for short. The device is composed of a photonic crystal waveguide, a periodic radiation structure and a radiation suppression layer. The overall structure is designed based on the hexagonal lattice photonic crystal, and electromagnetic wave energy can be effectively bound in the waveguide transmission line. A periodic groove is etched above a waveguide transmission line, so that energy transmitted by a waveguide is radiated to a free space at a specific angle, and a directional radiation wave beam is formed. The effective radiation frequency band of the leaky-wave antenna is a terahertz frequency band, the relative bandwidth can reach 22%, and the leaky-wave antenna belongs to a broadband radiation device. The antenna has the advantages of being small in size and capable of achieving wide-angle beam scanning and ultra-wideband detection, the beam scanning function of the antenna can be used for achieving dynamic beam forming, the reliability of a communication link and the data transmission rate can be improved, and the antenna is suitable for various application scenes such as space optical communication and biological sensing scanning.

The utility model provides a high-performance terminal antenna and a mobile terminal device, the high-performance terminal antenna comprises a first radiation antenna and a second radiation antenna, and the first radiation antenna and the second radiation antenna are mutually coupled and connected to form a coupling gap. The first radiating antenna comprises a first antenna branch knot, a second antenna branch knot, a third antenna branch knot and a feeding point which are connected in sequence, and the feeding point is electrically connected with the first antenna branch knot; the second radiating antenna comprises a grounding point and a fourth antenna branch knot, and the grounding point and the feeding point are arranged on the two sides of the coupling gap respectively. According to the high-performance terminal antenna of the utility model, not only can the main branches extending the radiation area be mutually coupled, but also the overall radiation frequency and radiation efficiency of the antenna can be effectively improved.

The present disclosure provides a display panel, and belongs to the field of display technology. The display panel includes a display module and an antenna module located on a side of a display surface of the display module; the antenna module includes an antenna unit; the antenna unit includes a dielectric substrate, a radiation structure arranged on the dielectric substrate, a first feed line and a second feed line, the first feed line and the second feed line feed the radiation structure and are electrically connected with the radiation structure, and feeding directions of the first feed line and the second feed line are different; the radiation structure includes radiation patches for at least two radiation frequency bands, and the radiation patches are electrically connected.

The invention relates to an antenna combination and terminal equipment. The antenna combination comprises a first antenna; a second antenna; the parasitic branch knot is arranged between the first antenna and the second antenna, the length of the parasitic branch knot is arranged in a preset range, the parasitic branch knot is used for enhancing the aperture of the first antenna and the aperture of the second antenna, and the preset range is related to the radiation frequency of the first antenna and the radiation frequency of the second antenna. According to the invention, the parasitic branch knot is arranged between the two antennas, and the length of the parasitic branch knot is reasonably configured according to the radiation frequencies of the two antennas, so that the calibers of the two antennas can be respectively enhanced, that is, the two antennas share the parasitic branch knot to enhance the calibers, and the radiation capability is improved; according to the antenna combination, the radiation capability of the antenna formed by the limited middle frame of the terminal equipment can be enhanced, so that the communication effect of the terminal equipment is improved.

The application provides an antenna structure applied to an electronic device including a first shell, a second shell and a hinge. The first shell and the second shell are rotatably connected through the hinge. The antenna structure is accommodated in any one of the first shell or the second shell. The antenna structure includes a feed-in part, a first radiation part and at least one grounding end. One end of the first radiation part is connected to the feed-in part, and the other end of the first radiation part has a spacing with the hinge. The first radiation part feeds in a current through the feed-in part, conducts the current and couples the current to the hinge, so as to excite at least one working mode to generate at least one radiation frequency band of a radiation signal. The application also provides an electronic device with the antenna structure.

An electromagnetic radiation frequency, or equivalent wavelength, converter, the converter including a nonlinear optical component or part having or consisting of a predetermined nonlinear optical material, and a guiding module. The guiding module has a predetermined geometry defining or controlling an effective refractive index of the guiding module, and is configured to receive and guide pump light resulting in a guided pump beam. The nonlinear component or part is bonded with or joined to the guiding module. The bonding is configured to allow at least a part of the guided pump beam to overlap and / or evanescently couple into the nonlinear optical material, and the nonlinear optical component or part is configured to convert the guided pump beam in the nonlinear optical material to an un-guided signal mode radiated as an output light signal at a different frequency or an equivalent wavelength.

The invention provides an antenna module, an antenna assembly and electronic equipment, the antenna module comprises a first antenna, a second antenna, a feed network layer and a reflecting plate, the first antenna, the second antenna, the feed network layer and the reflecting plate are stacked in sequence and are arranged at intervals, the feed network layer is electrically connected with the second antenna and the first antenna, the radiation frequency band of the first antenna is smaller than that of the second antenna, and the first antenna is a hollow antenna. Thus, because the first antenna is a hollow antenna, the radiation signal of the second antenna can directly transmit the first antenna, thereby reducing the blocking of the radiation signal of the second antenna by the first antenna, reducing the interference between the radiation signals of different frequency bands radiated by the first antenna and the second antenna, and improving the communication performance of the antenna module.

The present disclosure relates to the technical field of antenna communication, and provides an antenna unit and a multi-system shared antenna. The feeding assembly of the antenna unit is arranged on the base assembly, the dielectric substrate is arranged on the feeding assembly, the first radiation arm and the second radiation arm are oppositely arranged on the dielectric substrate along a first direction and are electrically connected with the feeding assembly; the first radiation arm and the second radiation arm are both bent back to form a wave-transparent structure, and the first radiation arm and the second radiation arm are asymmetric structures, so that the first radiation arm and the second radiation arm correspond to the wave-transparent requirements of different frequency bands respectively, and the antenna unit works through the wave-transparent structures of the bent-back first radiation arm and second radiation arm to filter electromagnetic waves of different frequency bands respectively, so as to suppress the coupling of electromagnetic waves of a high frequency band on an antenna unit of a low frequency to generate a high-frequency current, effectively suppress the scattering generated by the mutual coupling of a high-radiation frequency and the antenna unit, improve the distortion of the radiation pattern, and make the antenna meet the wave-transparent needs of different frequency bands.

The invention relates to electronic equipment, which comprises a first folding part and a second folding part, and is characterized in that the first folding part is provided with a first antenna radiator; the second folding part can be folded or unfolded relative to the first folding part, a second antenna radiator and a switch assembly are arranged on the second folding part, the first antenna radiator and the second antenna radiator are opposite in the folding state, and the switch assembly is used for controlling the current flowing direction of the second antenna radiator. According to the design, the radiation frequency of the first antenna radiator and the second antenna radiator can be ensured while the absorption of antenna radiation by a human body is reduced, so that the signal quality of the electronic equipment is ensured. Besides, the electronic equipment provided by the invention does not need an SAR (Synthetic Aperture Radar) induction antenna radiator, so that the design forms and working modes of the first antenna radiator and the second antenna radiator are not limited, and the application flexibility of the first antenna radiator and the second antenna radiator is improved.

A method for characterizing a tissue sample is disclosed, which includes placing at least one nanostructured sensor in contact with said tissue sample, wherein said nanostructured sensor includes at least one response characteristic exhibiting dependence on a refractive index of said tissue sample when said nanostructured sensor is in contact with said tissue sample; directing interrogating optical radiation at a plurality of frequencies to said nanostructured sensor; detecting, for each of said optical radiation frequencies, radiation redirected by or transmitted through said nanostructured sensor in response to said interrogating optical radiation; analyzing said detected redirected or transmitted radiation to determine said at least one response characteristic of said nanostructured sensor at each of said plurality of interrogating optical radiation frequencies; and determining at least one attribute of said tissue sample based on said determined at least one response characteristic at said interrogating optical radiation frequencies.

The embodiment of the utility model relates to the technical field of antennas, and discloses an integrated antenna and communication equipment, the integrated antenna comprises an antenna main body, an isolation structure and a metal feed structure, the antenna main body is provided with a circuit mainboard, one end of the circuit mainboard is provided with a radiation layer, and the other end of the circuit mainboard is provided with a grounding layer, the radiation layer comprises a first antenna unit and a second antenna unit, the first antenna unit and the second antenna unit are electrically connected with the grounding layer through a metal feed structure, the metal feed structure penetrates through the circuit board, the radiation frequency bands of the first antenna unit and the second antenna unit are different, and the radiation frequency bands of the first antenna unit and the second antenna unit are different. The isolation structure is arranged on the first antenna unit. Through the above mode, mutual interference between the antenna units can be effectively reduced, and the radiation efficiency of the antenna is improved.

The present invention provides a multi-frequency co-body antenna, comprising an antenna substrate with a V-shaped extension and an L-shaped extension on the left and right sides, respectively; the vertical branches of the L-shaped extension are provided with an ultra-low frequency radiation branch; the lower branches of the V-shaped extension are provided with a high frequency radiation branch, the upper branches of the V-shaped extension are provided with a low frequency radiation branch, and the horizontal branches of the L-shaped extension are provided with a first resonant branch, an intermediate frequency radiation branch, and a second resonant branch at intervals; the high frequency radiation branch and the intermediate frequency radiation branch are connected and connected to a first feeding point and a grounding point, the two ends of the first resonant branch are respectively connected to the right end of the low frequency radiation branch and the right end of the intermediate frequency radiation branch; the two ends of the second resonant branch are respectively connected to the first feeding point on the antenna substrate and the ultra-low frequency radiation branch. The multi-frequency co-body antenna of the present invention achieves full coverage of high frequency, intermediate frequency, low frequency, and ultra-low frequency radiation frequencies.

The utility model discloses a radiation stray test device, relates to the wireless communication test technology field, the radiation stray test device comprises a shielding box, a mounting rack, a first antenna, a driving assembly and a control assembly, the shielding box is internally provided with a test cavity, the first antenna and the mounting rack are oppositely arranged, the driving assembly is arranged in the test cavity, and the control assembly is arranged in the test cavity. The driving assembly and the mounting frame are distributed at intervals in the first direction, the driving assembly is connected with the first antenna, and the control assembly is electrically connected with the driving assembly and the first antenna. The communication equipment can be fixed on the mounting frame, and under the control of the control assembly, the driving assembly can drive the first antenna to move in the second direction or the third direction. Therefore, the first antenna can move to a plurality of positions around the communication equipment, and parameters such as radiation frequency at the plurality of positions can be acquired at the same time, so that the radiation stray test is completed. In the process, the radiation stray testing device can perform automatic testing, manual operation is avoided, and the working efficiency and the testing precision of radiation stray testing are improved.

The application discloses a thermoacoustic loudspeaker with electroacoustic linear response characteristics based on Peltier effect and a preparation method thereof, and belongs to the field of acoustic devices. The thermoacoustic loudspeaker comprises a functional array formed by one or more array elements, and a plurality of electrodes connected with the first and second end surfaces of the array elements. Each array element is formed by a functional material which generates Peltier effect under the condition of being electrified and the electrodes connected therewith. The sidewalls of the plurality of array elements are electrically insulated from each other, and all the array elements are electrically connected through the electrodes. The functional material of the array element, the electrode material and the connection mode of the electrode and the array element are selected so that the Peltier effect dominates the temperature fluctuation of the surface of the device, and then the thermoacoustic effect is realized by periodically heating and cooling the adjacent gas thin layer. Under the driving of alternating current, the upper and lower surfaces generate Peltier heat with opposite phases, and the sound waves with the same radiation frequency, opposite phases and linear relationship between the sound pressure and the current are radiated.

The present disclosure relates to an antenna assembly and a terminal device. The antenna assembly comprises: a conductive frame, a circuit board and a metal conductor; the metal conductor is connected to a feeding point on the circuit board at one end and connected to a switch assembly on the circuit board and the conductive frame at the other end, the switch assembly is used for adjusting a radiation frequency band of the antenna assembly; and a radiator of the antenna assembly comprises the metal conductor and the conductive frame. Through the embodiment of the present disclosure, the feeding point is connected to the conductive frame through the metal conductor, the position of the feeding point can be flexibly set through the metal conductor without changing the connection position of the conductive frame, thereby reducing the situation that the setting position of the feeding point is limited; and meanwhile, the radiation frequency band can be adjusted based on the switch assembly.

The present invention relates to an automotive sound attenuating trim component having both sound-insulating and sound-absorbing properties. The trim component has mass spring characteristics and thus includes a spring layer and a mass layer. The mass layer is composed of a barrier layer and a porous fiber layer adjacent to each other and is laminated with the barrier layer located between the spring layer and the porous fiber layer, the radiation frequency of the mass layer is at least 3 kHz, and the average sound absorption value is at least 0.40.

The invention provides a three-phase rectifier EMI (Electro-Magnetic Interference) characteristic analysis method, which comprises the following steps of: analyzing correlation between EMI characteristics of a three-phase rectifier and high-frequency parasitic parameters RLC (Radio Link Control) in an inductor, a capacitor and a diode contained in the three-phase rectifier, and respectively constructing high-frequency equivalent models of an RLC series-parallel multi-stage resonant structure by combining high-frequency resonance phenomena of the inductor, the capacitor and the diode; each device model is divided into a single-stage equivalent model of a conduction frequency band of 150 kHz to 30 MHz and a multi-stage equivalent model of a radiation frequency band of 30 MHz to 1 GHz; based on the topological structure of the device model, respectively obtaining corresponding impedance expressions associated with the high-frequency parasitic parameter RLC; and constructing a multivariate objective function and solving an optimal solution according to the impedance expression of each device and actually measured data so as to obtain an optimal high-frequency parasitic parameter RLC of each equivalent model, and performing EMI prediction through a time-frequency domain coupled field-circuit collaborative simulation method. According to the invention, the characterization of the impedance characteristic of the device in the broadband range from kilohertz to gigahertz can be realized, and the EMI characteristics of conducted emission (CE) and radiated emission (RE) of the three-phase rectifier can be systematically analyzed.

Systems and methods to eradicate insects using microwave radiation at ±250 MHz of the resonance frequency of insects and without the use of chemicals. An insect eradication system includes one or more RF shielding layers supported on a collapsible frame and configured to form a canopy over infested objects including beds. A mobile cart disposed adjacent to the insect-infested object houses a microwave generator, power supply module, control module, and microwave transmission components. The incident microwave radiation frequency at ±250 MHz of the resonance frequency of the insects rapidly increases the temperature inside the carapace of the insect by flash heating and kills the insects while only minimally increasing the temperature of the insect-infected objects.

A measurement apparatus (10) for determining the position of a component (226) in a system (200) comprises a radiation generator (24) that is configured to generate a measurement radiation (22e) with at least two discrete radiation frequencies (36; 136) that are selected comb frequencies (38) of a frequency comb structure (37), wherein the frequency comb structure is defined by at least two comb parameters, of which the first comb parameter comprises a uniform frequency spacing (42) between the comb frequencies and the second comb parameter comprises a frequency offset of the frequency comb structure from a reference frequency, an optical resonator (16) that comprises resonator frequencies (17) and a measurement target (14) assigned to the component and is configured to carry out a distance measurement by irradiating the measurement target with the measurement radiation, and a coupling module (32) that is configured to couple the at least two discrete radiation frequencies to two of the resonator frequencies and, for this purpose, comprises a radiation detector (50) for detecting a radiation sample (22r) of the measurement radiation, said radiation sample having been branched off from the optical resonator, and a control device (54), wherein the control device (54) is configured to generate a control signal (56) for the radiation generator from the radiation sample detected by the radiation detector, said control signal comprising a specification (42v) for at least one of the comb parameters.

The embodiment of the application provides an electronic device, which comprises: a device main body, an antenna, a resonant component, a first grounding point and a frequency adjusting structure; the antenna, the resonant component, the first grounding point and the frequency adjusting structure are arranged on the device main body; the resonant component is provided with a second grounding point; the first grounding point is connected to the second grounding point, and the frequency adjusting structure is electrically connected to the second grounding point through the first grounding point, so as to adjust the resonant frequency of the resonant component to a target frequency, and the target frequency is outside the radiation frequency range of the antenna.

The invention provides an antenna structure and electronic equipment, and relates to the field of communication. The antenna structure comprises a key, a conductive frame, a first antenna and a second antenna. The first antenna is arranged on the key, the second antenna is arranged on the conductive frame, the key is movably connected with the conductive frame, the first antenna has a first radiation frequency band, and the second antenna has a second radiation frequency band. The first antenna and the second antenna enable the antenna structure to have a larger radiation frequency band, and the structure that the antenna is arranged on the key can save the antenna arrangement space on the conductive frame, thereby facilitating the optimization of the antenna arrangement of the electronic equipment, and increasing the radiation frequency band of the electronic equipment.

The invention discloses a device and a method for reducing the uncertainty of radiation frequency shift of an optical lattice clock black body, and belongs to the technical field of metering instruments. The invention provides a device for reducing the uncertainty of radiation frequency shift of an optical lattice clock black body. The device comprises a thermal isolation transmission unit, a Peltier, a thermal shielding cavity, a resistance temperature sensor and a temperature control unit, a Peltier temperature control heat shielding cavity is adopted, so that the temperature around atoms can be reduced to below zero, and the temperature of the cavity can be accurately regulated and controlled; meanwhile, the inner surface and the outer surface of the heat shielding cavity are high-temperature fired copper oxide surfaces, the surface emissivity can be stabilized, real-time and accurate temperature measurement is achieved in combination with a resistance temperature sensor, the temperature control precision and the emissivity stability are improved, the uncertainty of black body radiation frequency shift can be greatly reduced, and the development requirement of a magnitude light clock is met.

The application provides an ultra-radiation pulse system, and belongs to the technical field of ultra-radiation and pulse source. The system comprises a support layer, zero-refractive-index super-structured material, a plurality of metal columns fixed on the support layer and arranged in a periodic interval, and a plurality of dipole transmitting antennas. The zero-refractive-index super-structured material is used for realizing a zero-refractive-index environment for a radiation frequency of the ultra-radiation pulse system. The dipole transmitting antennas are distributed in corresponding interspaces in the zero-refractive-index super-structured material, used as an emission source of ultra-radiation, used for exciting a radiation field of the ultra-radiation in the ultra-radiation pulse system, and used for generating an ultra-radiation pulse signal. An output end is used for outputting the ultra-radiation pulse signal with as low loss as possible. The application can realize the ultra-radiation with a source number growth of emission rate in quantum theory in a microwave to terahertz frequency band range, and the zero-refractive-index environment releases the limitation of the traditional ultra-radiation on a device size smaller than a wavelength, so that the extended ultra-radiation without a linear dimension limitation is possible.

The application relates to the field of laser technology and discloses a device for generating ultraviolet light through laser radiation frequency conversion, which comprises a front optical system for adjusting the light intensity distribution of an input fundamental wave beam, converting part of the incident fundamental wave beam into a second harmonic wave, or adjusting the cross-sectional light intensity distribution shape of the converted second harmonic wave, and outputting the adjusted second harmonic wave to a fourth harmonic crystal to generate a fourth harmonic wave, which is emitted from the exit interface of the fourth harmonic crystal, refracted out through the exit interface, and output as a fourth harmonic exit beam. The application adjusts the light intensity distribution shape and beam size of the fundamental wave or second harmonic wave before conversion, realizes the frequency conversion of the extracavity laser beam, effectively controls the quality of the generated fourth harmonic beam, and meets the general requirements for the characteristics of ultraviolet light, including deep ultraviolet light and vacuum ultraviolet light, or the characteristics of the beam under the condition of using a small amount of or no ultraviolet optical components.