23 results about "Radiation frequency" patented technology

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 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 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.

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 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.

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.

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 application discloses a sea surface emissivity prediction method based on ship measurement experiment, and belongs to the field of marine data prediction. The method divides the sea surface emissivity into flat theoretical emissivity and roughness emissivity. Real sea surface radiation data and seawater and meteorological data are collected by ship measurement. The flat sea surface emissivity theoretical value is calculated according to the radiation frequency and seawater parameters. The angle, seawater and meteorological data are used as model inputs, and the sea surface roughness emissivity is used as target output to train a nonlinear regression model. The theoretical flat emissivity and the nonlinear regression model roughness emissivity prediction result are combined to obtain the sea surface emissivity under the corresponding environment. The method has certain generalization ability on parameters such as angle and wind speed, has higher angle resolution, and can supplement some angles and sea condition conditions that cannot be collected in the actual measurement process. The calculation speed of the model is obviously faster than that of the rough sea surface emissivity theoretical calculation based on the sea wave spectrum, and the calculation resources consumed are smaller.

A high-isolation broadband base station common-caliber antenna array comprises a metal floor, a high-frequency antenna array, a frequency selection surface layer and a low-frequency antenna which are sequentially arranged from bottom to top. The metal floor plays a supporting role, the high-frequency antenna array is responsible for high-frequency-band radiation of the antenna array, the frequency selection surface layer enables the low-frequency antenna and the high-frequency antenna array to be in electromagnetic isolation, and the low-frequency antenna is responsible for low-frequency-band radiation of the antenna array; a suppression structure is loaded on the low-frequency antenna, the frequency selection surface layer is composed of M1 * N1 identical frequency selection units, the frequency selection units broaden the wave transmission bandwidth in a mode that double PLC resonance structures are connected in series, equivalent capacitors are connected to the two sides of the double PLC resonance structures in series, and the reflection frequency band of the frequency selection surface layer is regulated and controlled to cover the working frequency band of the low-frequency antenna. The high-frequency antenna array is composed of M2 * N2 identical high-frequency antenna units; according to the invention, the broadband electromagnetic transparent design of the low-frequency antenna is realized; electromagnetic isolation between the low-frequency antenna and the high-frequency antenna is improved by introducing the frequency selective surface, and array modularization is achieved.

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 discloses a blackbody radiation shielding device suitable for an ultrahigh vacuum environment, and the device comprises an annular cavity, the circumferential direction of the annular cavity is provided with a pair of atomic beam inlets and outlets and five pairs of optical windows, the bottom of the annular cavity is provided with a cavity bottom plate, the top of the annular cavity is provided with a cavity cover, and the cavity cover and the cavity bottom plate are respectively provided with an optical window. The flange plate tightly presses the C-shaped heat conducting plate provided with the platinum resistance probe on the lower surface of the cavity bottom plate and is fixedly connected with the cavity bottom plate, and the water-cooling MOT coil tightly presses the semiconductor chilling plate on the lower surface of the flange plate and is fixedly connected with the flange plate. According to the invention, the platinum resistor is fixed outside the vacuum and can be detached at any time for secondary calibration, the influence of the vacuum baking process on the platinum resistor is eliminated, and the temperature measurement precision is improved; active temperature control is performed in the shielding cavity through the semiconductor chilling plate and the C-shaped heat conduction plate, temperature fluctuation in the cavity is reduced, and the uncertainty of the frequency of the atomic optical clock caused by black body radiation frequency shift is remarkably improved.

The present application relates to the technical field of electronic temperature diagnosis, and provides a diagnosis method and system for measuring quasi-circular symmetric stellarator electronic temperature, which comprises establishing a correlation between radiation frequency and spatial position, focusing the plasma microwave radiation into a Gaussian beam through a mirror group and focusing it on the core of the plasma, matching a complex three-dimensional magnetic field; determining an effective measurement range by calculation, so that the Gaussian beam accurately covers the range, and improving the resolution by beam focusing; completing diagnosis full-link calibration by using a blackbody source, establishing a quantitative corresponding relationship between the radiation signal intensity and the electronic temperature, and inversely calculating the electronic temperature distribution in multiple dimensions; layering the electronic module into a radio frequency part and an intermediate frequency part, processing the signal through multi-stage filtering and low-noise amplification, matching an adaptive waveguide tube to reduce the loss, and adding a data verification step to ensure the reliability of the measurement data.

The embodiment of the invention provides an antenna, a frequency adjusting method and device thereof and electronic equipment, and relates to the technical field of wireless communication, and the antenna comprises a dielectric layer which comprises a telescopic film structure; the radiation layer is arranged on the surface of the telescopic film structure, and the material of the radiation layer comprises a conductive material with ductility; the reference electrode layer is arranged on one side, deviating from the radiation layer, of the dielectric layer; and the telescopic assembly is connected with the telescopic film structure and is used for adjusting the plane size of the telescopic film structure through telescopic motion so as to adjust the plane size of the radiation layer. The radiation frequency can be changed, other tunable elements do not need to be introduced, the structure is simple, and the cost is low.

The invention discloses a main vacuum cavity device of a high-precision optical lattice clock, which belongs to the field of metering instruments and comprises a special-shaped main vacuum cavity provided with a plurality of windows, interfaces and electrodes. A heat shield device is arranged in the special-shaped main vacuum cavity, an indium tin oxide conductive optical thin film is arranged on the side, close to the vacuum side in the special-shaped main vacuum cavity, of the window, the indium tin oxide conductive optical thin film is communicated with the special-shaped main vacuum cavity, and the inner surface of the special-shaped main vacuum cavity is coated with carbon nano tube ultra-black paint. A heat shield through hole is formed in the center of a heat shield body of the heat shield device, grooves are formed in the two sides of the heat shield body, film platinum resistors are installed on the grooves, the cold end of a Peltier is attached to one end of the heat shield body, the hot end of the Peltier is attached to one end of a heat conduction base, and the other end of the heat conduction base is installed on the inner surface of a special-shaped main vacuum cavity. The heat insulation layer is arranged on the outer surface of the heat shield body, direct-current stark frequency shift can be eliminated, and the uncertainty of black-body radiation frequency shift can be reduced to 10-19 orders of magnitude.

The application discloses an antenna and a remote controller, and relates to the technical field of communication. The antenna comprises a substrate, a vibrator group and a connecting piece. At least one of the two opposite sides of the substrate is provided with a vibrator group, and the vibrator group comprises a plurality of first vibrator parts distributed along the length direction of the substrate. The first vibrator part comprises a first connecting vibrator arm, a first high-frequency vibrator arm and a first low-frequency vibrator arm. The first connecting vibrator arm extends along the width direction of the substrate. The two ends of the first connecting vibrator arm are respectively connected with a first low-frequency vibrator arm and a first high-frequency vibrator arm. The first low-frequency vibrator arm and the first high-frequency vibrator arm extend in the same direction from the first connecting vibrator arm along the length direction of the substrate. The plurality of first vibrator parts can jointly serve as a radiation structure to enhance the radiation performance of the antenna. The antenna can generate resonance of a high radiation frequency band and resonance of a low radiation frequency band, so that the antenna can simultaneously realize the functions of high-frequency strong orientation and low-frequency weak orientation.