112 results about "Dielectric resonance" patented technology

Disclosed herein is a dielectric resonator antenna using a matching substrate in order to improve a bandwidth. The dielectric resonator antenna includes: a dielectric resonator body part that is embedded in a multi-layer substrate and has an opening part on the upper portion thereof; and at least one matching substrate that is stacked on the opening part and includes an an insulating layer having a dielectric constant smaller than that of the multi-layer substrate but larger than that of air, thereby making it possible to improve the bandwidth without adjusting the size of the dielectric resonator body part and to prevent loss and change in the radiation pattern due to the substrate mode.

Medical therapy apparatus comprises one or more transducers (3) for emitting radiation by means of dielectric resonance when subjected to an electrical stimulus, generating means (9) for providing the stimulus and control means (8, 10) for controlling the generating means (9) whereby radiation emitted from the transducers (3) is controlled so as to synchronise with the radiation generated in a selected diseased or injured area of a body and thereby stimulate or attenuate emissions of radiation by the body in the diseased or injured area.

Systems and methods for precision phase noise measurements of radio frequency (RF) oscillators are provided. An RF signal under test can be modulated on a continuous wave (cw) laser carrier frequency via generation of modulation sidebands using an appropriate modulator. A photonic delay line can be implemented as a self-heterodyne detection system for the phase noise, allowing for photonic down-conversion of the phase noise measurement to direct current (DC). The self-heterodyne detection system allows detection outside of any 1/f noise issues. Ultra-low phase noise detection for RF frequencies in a range from below 1 GHz to beyond 100 GHz is enabled with a low noise floor in the whole frequency range. Higher-order modulation sidebands can further reduce the noise floor of the system. Ultra-low noise RF (microwave) output can be generated. The RF signal under test can be generated by a dielectric resonance oscillator or opto-electronic oscillator.

The invention relates to a sensor based on Fano resonance characteristics of a dielectric nanostructure. The sensor consists of a transparent substrate to light waves of a working wavelength range and asymmetrical dielectric nano bar pair arrays which are uniformly arranged on the transparent substrate. According to the low loss characteristics of dielectric materials and Fano resonance characteristics of the asymmetrical nano bar pair arrays, high Q-value resonance is generated. Meanwhile, an opening is introduced into a dielectric resonance unit, so that interaction between an electromagnetic field in a Fano resonance mode and ambient environment medium is effectively enhanced, and the sensitivity and quality factor of the sensor are improved. According to the sensor designed by the invention, the quality factor far exceeds that of a similar sensor based on the Fano resonance characteristics of a metal nanostructure, and the sensor disclosed by the invention has significant application prospects in the aspects of chemical and biological sensing, hazardous gas and pollutant monitoring.

A dielectric resonator in a radio frequency filter is provided, in which a dielectric resonance element is fixed at the center of a housing space formed by a cover and a housing, a guide groove is formed into a bottom of the housing, for allowing the dielectric resonance element to be inserted therein, a metal plate is interposed between the cover and the housing, and a dielectric fixing screw is engaged with the cover at a position corresponding to an upper end portion of the dielectric resonance element by screwing, for fixing the dielectric resonance element by pressing the upper end portion of the dielectric resonance element.

The invention discloses a dielectric resonance UHF RFID label antenna provided with a T-shaped matching network, which comprises an upper layer dielectric resonator, a middle layer dielectric substrate, a lower layer dielectric substrate and a bottom layer copper sheet floorboard, wherein a copper sheet feeder line is arranged between the upper layer dielectric resonator and the middle layer dielectric substrate, a microstrip matched line is arranged between the middle layer dielectric substrate and the lower layer dielectric substrate, the microstrip matched line and an open circuit short-circuit line form the T-shaped matching network, the copper sheet feeder line is connected with the microstrip matched line through a via hole, the via hole passes through the lower layer dielectric substrate and is connected with the bottom layer floorboard, and a feeding port is connected with an RFID label chip. The dielectric resonance UHF RFID label antenna can work in a radio frequency recognition system at a UHF frequency band with the bandwidth covering 866 to 869 MHz or 902 to 928 MHz, not only can conveniently achieve the impedance matching between the chip and the antenna, but also can be conveniently applied to multi-application environments of metal surfaces and the like, and has the characteristics of small volume, high gain, easy processing and low cost.

The invention provides a dielectric resonator tuning structure and a dielectric resonator tuning method. The structure comprises a cavity, a dielectric resonance pole, a tuning component, a tuning cover plate, a nut and bolts, wherein the dielectric resonance pole is fixedly arranged at the bottom of the cavity; the tuning component is arranged on the tuning cover plate; the nut is arranged at the top end of the tuning component, and is used for locking the tuning component after tuning is finished; and the tuning cover plate is fixed on the cavity through the bolts. The tuning component is moved up and down by rotating a plastic screw on the tuning component to change a distance between a metal sheet and the dielectric resonance pole, so that required resonance frequency can be obtained by properly regulating the distance in a small space, and specifically, frequency is increased if the plastic screw is screwed in, and is decreased if the plastic screw is screwed out; and in addition, the production cost is decreased, the production efficiency of the product is improved, and the market share is increased.

A dielectric resonance device includes a cavity body, a support base disposed inside the cavity body, and a dielectric core supported by the support base. A stepped portion is provided inside the cavity body such that a gap between the outer circumferential surface of the dielectric core and the inner wall surface of the cavity body and a gap between the peripheral portion of the support-base attachment surface of the dielectric core and the stepped portion change in opposite directions with temperature variation. Thus, variation with temperature in the resonance frequency of a TM01delta mode is suppressed.

The invention provides a dielectric filter including a metal case having an opening in the upper part, a metal lid of closing the opening, a dielectric resonance element placed on the internal bottom face of the case through a support, a bolt made of dielectric material inserted in a position in the lid corresponding to the dielectric resonance element, and a metal plate placed at the end of the bolt substantially in parallel with the upper face of the dielectric resonance element, wherein the position of the bolt is adjusted to change the space between the dielectric resonance element and the plate, whereby the resonance frequency is controlled.

The invention discloses a dielectric resonator, a flexible conductive shielding part and a dielectric filter. The dielectric resonator provided by the embodiment of the invention comprises a dielectric resonance column, a cavity which is provided with the dielectric resonance column and the flexible conductive shielding part, wherein the flexible conductive shielding part seals the cavity to form a resonance cavity, and is flexibly contacted with the dielectric resonance column, so that the upper surface of the dielectric resonance column is directly earthed and conducted through the flexible conductive shielding part. Because the flexible conductive shielding part is adopted to directly seal the cavity to form the resonance cavity, the flexible conductive shielding part replaces the function of an original cover plate so as to reduce product cost; and meanwhile, the upper surface of the dielectric resonance column is directly earthed through the flexible conductive shielding part, so the earthing is more reliable, and the performance index of the dielectric resonator is improved.

The invention discloses an all-dielectric meta-material resonance device with high quality factor. The device comprises a substrate and two-dimensional periodic dielectric resonance units on the upper surface of the substrate. The substrate is made of a dielectric material. Each dielectric resonance unit is a dielectric bar with a rectangular cross section. The length, width and height of each dielectric bar meet the following conditions: a>=2*b, a>=2.5*h, and 1.6*a<=lambda<=2.4*a, wherein a, b and h respectively represents the length, width and height of each dielectric bar, lambda is the resonance center wavelength of the resonance device, and the dielectric constant of the dielectric resonance units is larger than that of the substrate. When electromagnetic wave is incident in a direction perpendicular to the upper surfaces of the dielectric bars and the electric field polarization direction is perpendicular to the first sides of the dielectric bars, Mie electro-magnetic resonance can be produced, and an extremely high Q value can be achieved.

The invention discloses a TM dielectric resonator realizing method. The TM dielectric resonator realizing method comprises the following steps of manufacturing a dielectric resonance column assembly provided with a metal connecting plate, wherein a connecting stud is manufactured on the metal connecting plate; manufacturing a metal cavity with one open end; utilizing the connecting stud to screw the dielectric resonance column assembly provided with the metal connecting plate into an inner wall of the metal cavity; using a pre-fabricated cover plate to seal an opening of the metal cavity; and screwing a pre-fabricated tuning screw into the metal cavity from the cover plate. The TM dielectric resonator realizing method is simple in manufacturing technology, and a manufactured TM dielectric resonator is small in size, good in performance and high in reliability. The invention further provides the TM dielectric resonator manufactured by means of the method and a dielectric filter consisting of one or more TM dielectric resonators.

A non-electronic all-dielectric (NEAD) or non-electronic RF (NERF) front-end that exploits isolation features of photonics to eliminate metal electrodes, interconnects and the antenna. An electro-optic (EO) modulator is integrated with a dielectric resonance antenna to exploit unique isolation features of photonics. A doubly (RF and optical) resonant device design maximizes the receiver sensitivity. High-Q optical disk resonators and dielectric resonant antennas are integrated to create an efficient mixing of light and RF fields. The resulting non-electronic RF technology produces an all-dielectric RF front-end which provides complete isolation between the air interface and the ensuing electronic circuitry, enabling the creation of an RF receiver that is immune to high-power electro-magnetic pulses (EMP) and High Power Microwave (HPM) pulses. The device can also be configured as a non-intrusive field probe that co-exists with a conventional receiver and detects a EMP or HPM attack.

The invention discloses a TM mold dielectric filter. The TM mold dielectric filter comprises a housing, a cover plate, a first installation sheet and at least one dielectric resonance column, wherein the housing is provided with an opening; the cover plate is fixed at the opening side of the housing; at least one of the dielectric resonance column is welded with the first installation sheet so as to form a dielectric resonance column assembly; and the dielectric resonance column assembly is fixed between the housing and the cover plate. According to the TM mold dielectric filter provided by the application of the invention, the first installation sheet can balance the expansion difference between the housing and the dielectric resonance column so as to prevent the cracks of the dielectric resonance column because the housing, the cover plate and the dielectric resonance column contract or have different expansion degrees when temperature changes.

The invention provides a double-frequency high-gain dielectric resonance array antenna. The antenna comprises a substrate, two microstrip feed networks and a dielectric resonant unit array composed of N dielectric resonant units, N >=1, the microstrip feed networks are arranged on the substrate, the N dielectric resonant units are arranged on the substrate in a coaxial or collinear arrangement manner, feed points of the dielectric resonant units are coupled to the output ends of the two microstrip feed networks, first feed slots are arranged in two side surfaces of each dielectric resonant unit, and a second feed slot is arranged in the bottom surface of each dielectric resonant unit. One microstrip feed network is provided with a group of coupling apertures close to the output end of a dielectric cube, the other microstrip feed network is provided with a group of coupling probes close to the output end of a dielectric cube, the coupling probes and the first feed slots form a coupling power, the coupling apertures are formed in the substrate and coupled with the second feed slots. The high-gain dielectric resonance array antenna is compact in structure, low in weight, low in loss, high in efficiency, low in cost, easy to assemble and suitable for batch production and includes fewer welding points, and can be used to provide effective or beneficial references for design and improvement of other broadband, multi-frequency, low-gain dielectric resonant units or array antennas.

A substantially circular electrode 3 is arranged on a surface 2A of a dielectric substrate 2 of a TM010-mode resonator 1. A coupling line 5, which extends along a diameter of the substantially circular electrode 3, is arranged on a back surface 2B of the dielectric substrate 2, and back-surface electrodes 7 are arranged with the coupling line 5 interposed therebetween in the width direction. Furthermore, signal lines 11 and ground electrodes 13 are arranged on a surface of an external substrate 10 in positions other than portions facing the coupling line 5 of the TM010-mode resonator 1. The signal lines 11 are connected to the coupling line 5 of the TM010-mode resonator 1 and the ground electrodes 13 is connected to the back surface electrodes 7.

The invention discloses a dielectric resonance block, a dielectric waveguide filter and a coupling structure of the dielectric waveguide filter. A first metalized layer is arranged on the dielectric resonance block; the first metalized layer is provided with an annular through groove and a second metalized layer arranged in the annular through groove; and the annular through groove is used for forming a coupling window. The strength of energy coupling between dielectric resonance blocks can be improved, higher harmonics are prevented from being relatively close to the pass band, and the far-end out-of-band performance is good; in this way, the energy coupling strength of the coupling structure adopting the dielectric resonance block is high, the higher harmonics are relatively far away from the pass band, and the far-end out-of-band performance is good; and therefore, the energy coupling strength of the dielectric waveguide filter adopting the coupling structure is high, and the far-end out-of-band performance is good.

The invention discloses a multi-band dielectric resonance cell phone terminal antenna; the multi-band dielectric resonance cell phone terminal antenna comprises a rectangular ceramic dielectric medium (3) with a groove and a high dielectric constant, a multi-branch monopole (4), a dielectric board (1), a feed microstrip line (2), a printed ground (5) and a via hole (6). The antenna structure is characterized in that the use of the multi-branch monopole excite the rectangular dielectric medium with high dielectric constant, the electric field distribution in the medium is changed to make the medium generate a multi-mode resonance, thus achieving the requirements of the multi-mode multi-band of the terminal antenna, meanwhile, the dielectric medium is added with a groove, thus the radiation area of the dielectric medium can be increased as well as effectively reducing the weight of the antenna, thereby improving the radiation efficiency of the antenna. The multi-band dielectric resonance cell phone terminal antenna is characterized in small size, light weight, simple structure, wide working band, and high radiation efficiency. The multi-band dielectric resonance cell phone terminal antenna is low in manufacturing cost, simple in structure, easy to machining and integrate, can simultaneously meet the communication standards of 2G, 3G and 4G; and the multi-band dielectric resonance cell phone terminal antenna has a good popularization and application foreground.

The invention discloses an all-dielectric super-surface electromagnetically induced transparent resonance device, comprising a substrate and a two-dimensional periodically distributed S-like dielectric resonance unit located on the surface of the substrate. The substrate is made of a dielectric material, and the dielectric constant of the substrate is greater than 0 and less than or equal to 5; S-like dielectric resonance unit consist of upper transverse part, upper longitudinal part, middle transverse part, lower longitudinal part and low transverse part, and that rotation angle of each connection part is 90 degrees, the upper transverse part, the middle transverse part, the lower transverse part are parallel to each other, and the upper longitudinal part and the lower longitudinal part are parallel to each other; the spacing between the upper and middle transverse parts is not equal to the spacing between the middle and lower transverse parts. The dielectric constant of the S-like dielectric resonant cell is equal to or greater than 6. The invention not only can realize high transmittance and high quality factor resonance, but also can improve group refractive index and realize slow light effect. In addition, the invention has robustness, that is, when the structural parameters of the resonant device are changed in a certain range, the EIT-like result is not affected, and compared with other electromagnetically induced transparent resonant devices, the advantage will be beneficial to device processing and engineering application.

The invention discloses a dielectric resonant antenna. The dielectric resonant antenna comprises a filtering feed module and a dielectric resonator, wherein the dielectric resonator is arranged on thefiltering feed module in a stacked mode, the filtering feed module is used for feeding the dielectric resonator, the dielectric resonator includes a first dielectric block and a second dielectric block, and the second dielectric block is arranged in the first dielectric block in a penetrating mode. The dielectric resonant antenna disclosed by the invention can realize directional radiation in a 24.75-27.5 GHz frequency band, has advantages of s small loss, high radiation efficiency, s low profile, s small outline, s simple structure, easiness in processing and the like, and is very suitable for a 5G indoor communication system.

The invention discloses a TM mode dielectric filter. The dielectric cavity comprises a cavity, a cover plate, a cover plate flange and a tuning threaded rod; the cover plate covers the cavity; the cover plate flange is connected with the lower surface of the cover plate in a screw joint manner; a dielectric resonator, a microstrip line, a circuit board, a first supporting part and a second supporting part are arranged in the cavity; the two supporting parts are perpendicularly fixed at the bottom of the cavity; the circuit board is perpendicularly connected with the upper ends of the two supporting parts; the microstrip line is arranged on the circuit board; the dielectric resonator comprises dielectric resonance columns and supporting columns; a clamping groove is formed in the bottom surface of each dielectric resonance column; a tuning hole is formed in the top surfaces of the dielectric resonance columns in the axial direction; the top surfaces of the dielectric resonance columns are welded with the cover plate flange; a groove is formed in the bottom of the cavity; a conductive elastomer is arranged in the groove; the upper ends of the supporting columns are clamped in the clamping groove; the lower ends of the supporting columns prop against the conductive elastomer; a through hole which runs through up and down is formed in the cover plate; and the tuning threaded rod passes through the through hole of the cover plate and a hole of the cover plate flange to extend into the tuning hole downwardly. By virtue of the dielectric cavity, the quality factor can be improved.