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42 results about "Radiation bandwidth" patented technology
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The side-lobes in general is an undesirable feature in a radiation pattern. The ratio of the main beam to the highest side-lobe is called the SSL of the radiation pattern. The bandwidth of an antenna refers to the range of frequencies over which the antenna can operate correctly.
Miniaturized microwave antenna
InactiveUS6680700B2Reduce antenna sizeSmall sizeSimultaneous aerial operationsAntenna supports/mountingsElectrical conductorEngineering
A miniaturized antenna is described with at least a ceramic substrate (10) and a metallization, particularly designed for use in the high-frequency and microwave ranges. The antenna is characterized in that the metallization is a surface metallization which is formed by a feed terminal (12) for electromagnetic energy to be radiated, by at least a first metallization structure (30), and by a conductor track (20) extending along at least part of the circumference of the substrate (10), which track connects the feed terminal to the at least one first metallization structure (30), which first metallization structure (30) comprises a first conductor track portion (31) extending from a side of the substrate lying opposite the feed terminal (12) towards the feed terminal and a first metallization pad (32). The antenna can be provided on a printed circuit board by surface mounting and has a great impedance and radiation bandwidth, so that it is particularly suitable for use in mobile telephones operating in the GSM and UMTS bands.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Antenna device
InactiveCN106921023AImprove radiation efficiencyAvoid individual slitsAntenna supports/mountingsAntenna equipments with additional functionsRadiation bandwidthRadio frequency signal
The invention provides an antenna device. The antenna device comprises a millimeter wave microstrip antenna, wherein the millimeter wave microstrip antenna is assembled on a shell of electronic equipment, the electronic equipment comprises a main antenna, the main antenna is arranged in the shell, an antenna gap is formed in the shell and is used for radiation / receiving of a radio frequency signal by the main antenna, the millimeter wave microstrip antenna comprises a plurality of unit antennas, the plurality of the unit antennas are arranged at intervals, and the plurality of the unit antennas and the shell are arranged at an interval and are arranged in the antenna gap in an array way. Compared with prior art, the antenna device provided by the invention has the advantages that the millimeter wave microstrip antenna is arranged in the antenna gap for radiation / receiving of the radio frequency by the main antenna, so that independent gap opening on the millimeter wave microstrip antenna is prevented, the same antenna clearance region can be shared with the main antenna, the design space of the millimeter wave microstrip antenna is saved, and the space utilization ratio is improved; and meanwhile, the radiation bandwidths of the unit antennas can also be effectively expanded, the gain is improved, the side lobe is suppressed, and the radiation efficiency of the antenna device is further improved.
Owner:AAC TECH PTE LTD
Two-dimensional waveguide slot array antenna having decoupling structure and design method thereof
InactiveCN107910642AAdjustable thicknessAdjust insertion depthAntenna couplingsSlot antennasRadiation bandwidthAntenna bandwidth
The invention relates to a two-dimensional waveguide slot array antenna having a decoupling structure and a design method thereof and relates to a waveguide slot antenna. The antenna sequentially comprises a T-shaped power splitter main waveguide, a feed waveguide, coupling slots, a radiation waveguide, radiation slots and an open air cavity from down to up. The antenna has the decoupling structure, the open air cavity is added outside the radiation slot, the mutual coupling effect between the radiation slots is suppressed by optimizing the three-dimensional size of the air cavity, and antennabandwidth constraints of mutual coupling in large-scale arrays are effectively ameliorated. According to antenna bandwidth design requirements, the proper antenna feed network is designed, through antenna sub-arrays, the integral antenna is simplified into multiple sub-arrays, so antenna bandwidth is ameliorated, and design difficulty is reduced; the quantity of radiation slots and coupling slotsin series connection in each sub-array is small, a resonant array can be employed for design, namely a standing wave array form, and matching bandwidth and radiation bandwidth of the antenna sub-arrays are greatly improved through specifically employing the overloaded technology.
Owner:XIAMEN UNIV
Radiation scattering regulated 1-bit excitable digital coding metasurface
The invention provides an exciteable digital coding metasurface unit of a cuboid structure, the upper surface and the lower surface of the exciteable digital coding metasurface unit are square, and the exciteable digital coding metasurface unit comprises a dielectric plate, a dielectric plate upper surface metal patch, a dielectric plate lower surface metal patch, a metal probe penetrating throughthe upper surface and the lower surface of the dielectric plate and an SMA interface in the lower surface of the dielectric plate. 1bit coding is carried out on the metasurface unit and a 90-degree rotating unit of the metasurface unit, and a 1bit excitable digital coding metasurface array is formed through a chessboard array. The single-station RCS of 10 dB is reduced to cover 4.88 GHz to 7.36 GHz, the maximum reduction amount exceeds 30 dB, and the radiation bandwidth covers 7.59 GHz to 7.64 GHz. Linear polarization, left-handed circular polarization and single-beam and four-beam radiationcan be realized through different excitation conditions. According to the method, the 1bit digital coding metasurface can be excited, the working characteristics of the digital coding metasurface areexpanded, and the application range of the metasurface is greatly expanded.
Owner:AIR FORCE UNIV PLA
Bandwidth-limited and long pulse master oscillator power oscillator laser systems
InactiveUS7418022B2Limited bandwidthAvoid short lengthOptical resonator shape and constructionActive medium materialRadiation bandwidthAmplified spontaneous emission
Owner:COHERENT GMBH
System and Method for Signal Generation
InactiveUS20150288393A1Spatial transmit diversityAmplitude-modulated carrier systemsRadiation bandwidthCoupling
A high-power broadband radiation system and method are disclosed. The system includes an array of harmonic oscillators with mutual coupling through quadrature oscillators. Based on a self-feeding structure, the presently disclosed harmonic oscillators simultaneously achieve optimum conditions for fundamental oscillation and 2nd-harmonic generation. The signals at the second harmonic radiate through on-chip slot antennas, and are in-phase combined inside a hemispheric silicon lens attached at the backside of the chip. In some embodiments, the radiation of the system can also be modulated by narrow pulses generated on chip, thereby achieving broad radiation bandwidth.
Owner:CORNELL UNIVERSITY
Antenna system and mobile terminal
InactiveCN107611579AEfficient use of radiation bandwidthHigh sensitivityAntenna arraysAntenna supports/mountingsRadiation bandwidthEngineering
The invention provides an antenna system applied to a mobile terminal. The system comprises a first antenna, a second antenna, a third antenna, a fourth antenna, a first frequency selector, a second frequency selector, a WIFI module and a radio frequency unit, wherein the first antenna is connected with the WIFI module and the radio frequency unit through the first frequency selector; the second antenna is connected with the WIFI module and the radio frequency unit through the second frequency selector; and the third antenna and the fourth antenna are connected to the radio frequency unit separately. The antenna system can be designed through the first frequency selector and the second frequency selector, signals of different bands received by the antennas can be received and transmitted to the corresponding WIFI module and radio frequency unit separately, radiation bandwidths of the antennas can be effectively utilized to achieve a multi-antenna system, and furthermore, an MIMO WIFI can be well compatible with an LTE antenna to improve the sensitivity of LTE.
Owner:VIVO MOBILE COMM CO LTD
Antenna
InactiveCN104124519AReduce volumeSmall sizeSimultaneous aerial operationsAntenna supports/mountingsRadiation bandwidthEngineering
An antenna, comprising a primary radiation patch antenna, a first printed circuit board (PCB) substrate, a coaxial radio-frequency excitation port and a floor, wherein the primary radiation patch antenna is arranged at one side of the first PCB substrate, and is connected to the coaxial radio-frequency excitation port in the first PCB substrate; the coaxial radio-frequency excitation port is provided on the first PCB substrate, and one side of the first PCB substrate is provided with the primary radiation patch antenna, and the other side thereof is provided with the floor; and the primary radiation patch antenna is composed of one or more fractal structures. The antenna in the present invention can be applied to an RFID system of a small-scale terminal, and satisfies the reliability of the RFID system, thereby satisfying the potential demand of the current development and the future development of the RFID technology.
Owner:ZTE CORP
Filtering antenna based on metal integrated structure
ActiveCN106654539AReduce volumeSimple designRadiating elements structural formsAntenna couplingsResonant cavityCommunications system
The invention discloses a filtering antenna based on a metal integrated structure. The filtering antenna comprises a metal resonant cavity, a conductor assembly, a metal antenna cavity and a probe, wherein a metal plate is embedded in the metal resonant cavity; slot lines are arranged on the metal plate; the top of the metal antenna cavity is open while the rest parts are closed; the conductor assembly is fixed on the left wall of the metal resonant cavity, and connected with the left end of the metal plate; a circular through hole is formed between the right wall of the metal resonant cavity and the left wall of the metal antenna cavity; and one end of the probe passes through the center of the circular through hole to be connected with the right end of the metal plate while the other end of the probe is suspended and positioned in the metal antenna cavity. The filtering antenna can realize filtering and high antenna radiation performance; based on a multimode theory, the antenna is high in radiation bandwidth and high in frequency selectivity; and meanwhile, the filtering antenna has the advantages of small size, simple design, easy processing, good performance and the like; and requirement of a modern communication system can be well satisfied.
Owner:SOUTH CHINA UNIV OF TECH
Microstrip antenna structure and microwave imaging system using the same
InactiveUS20160149306A1Return lossIncrease electrical lengthSimultaneous aerial operationsRadiating elements structural formsRadiation bandwidthCoupling
A microstrip antenna structure is provided, which includes a substrate, a ring microstrip line and a signal transmission port. The substrate has opposite first and second surfaces. The ring microstrip line is disposed on the first surface of the substrate. The ring microstrip line has a short coupling gap ranged between 0.004λg and 0.06λg for forming a radiation bandwidth with high selectivity, where λg represents a guided wavelength of an electromagnetic wave in the ring microstrip line corresponding to a center frequency of the radiation bandwidth. The signal transmission port is disposed on the second surface of the substrate. The signal transmission port penetrates through the substrate and is electrically connected to the ring microstrip line.
Owner:METAL INDS RES & DEV CENT
System and method for signal generation
InactiveUS9344308B2Spatial transmit diversityAmplitude-modulated carrier systemsRadiation bandwidthCoupling
Owner:CORNELL UNIVERSITY
Four-mode broadband high-gain differential dielectric resonator antenna
ActiveCN111834739AHigh gainReduce Design ComplexityRadiating elements structural formsAntenna earthingsMetal stripsRadiation bandwidth
The invention provides a four-mode broadband high-gain differential dielectric resonator antenna. The antenna comprises a radiation unit comprising at least one cuboid dielectric resonator, two T-shaped excitation structures being arranged in parallel on a pair of opposite side surfaces of each dielectric resonator; a metal ground; and a metal circuit layer, provided with an input port; wherein the T-shaped excitation structure comprises a transverse metal strip and a vertical metal strip, one end of the vertical metal strip is connected with the middle part of the transverse metal strip, andthe other end of the vertical metal strip is connected with the first dielectric plate. According to the four-mode broadband high-gain differential dielectric resonator antenna provided by the invention, the gain of 4-5dBi is improved compared with the prior art through the sum of four higher modes of the dielectric resonator and the design of the differential dielectric resonator antenna, but thedesign complexity of a feed network is greatly reduced, and a wider radiation bandwidth is obtained.
Owner:NANTONG UNIVERSITY
Antenna module and terminal
InactiveCN111755812AHigh bandwidthSimple structureSimultaneous aerial operationsAntenna supports/mountingsMicrostrip patch antennaAngular scan
The invention discloses an antenna module and a terminal using the antenna module. The antenna module comprises an antenna array and a radio frequency phase shift system, wherein the antenna array iscomposed of a plurality of antenna units, and the antenna array and the radio frequency phase shift system are integrated on a circuit substrate to form an independent module. Furthermore, the antennaunits of the antenna module can adopt a scheme that a microstrip patch antenna structure is loaded with a short circuit column to generate a plurality of resonances, so the bandwidth of the antenna units is expanded, and after an antenna array is formed, the antenna modules can be further arranged in a mutually vertical arrangement manner to realize the functions of large-angle scanning and polarization diversity. The antenna module disclosed by the invention is simplified in structure, can be applied to 5G communication, and has the advantages of easiness in system integration, low profile miniaturization, relatively wide radiation bandwidth and capability of realizing large-angle scanning.
Owner:ELECTRIC CONNECTOR TECH +1
Small-sized multi-frequency broadband deformation sleeve antenna used for mobile communication
PendingCN107302127ASimple structureChanging the Impedance CharacteristicsSimultaneous aerial operationsAntenna supports/mountingsRadiation bandwidthElectrical conductor
Disclose is a small-sized multi-frequency-band deformation sleeve antenna. The sleeve structure of the existing sleeve antenna is simplified into multiple column bodies uniformly arranged on a bottom plate; matching of antenna input impedance is realized by loading metal columns at the bottom; by virtue of such design, the same radiation characteristic as the conventional sleeve antenna is maintained while the processing difficulty of the antenna is greatly lowered; and in addition, the deformation sleeve antenna is also additionally provided with a spiral conductor structure, and corresponding electrical dimensions of the working frequency band of the antenna are provided by the spiral structure, so that the overall physical length of the deformation sleeve antenna is shortened. The invention further provides a high-frequency radiation structure which can be coupled with the deformation sleeve structure; by matching with the deformation sleeve structure, the radiation bandwidth of the antenna can be expanded effectively; and the deformation sleeve antenna provided by the invention is symmetrical in structure, simple and concise, convenient for product processing and realization, and convenient to install, so that the mechanical strength of the antenna body can be effectively improved.
Owner:张颖松
Compact micro-wave antenna
InactiveCN1349277AEasy to produceFlexible adjustmentSimultaneous aerial operationsAntenna supports/mountingsElectrical conductorElectrical impedance
Owner:KONINK PHILIPS ELECTRONICS NV
Novel multimode broadband directional diagram diversity microstrip antenna
InactiveCN112688089AAchieving Broadband FeaturesImprove isolationAntenna couplingsSlot antennasRadiation bandwidthDielectric substrate
The invention discloses a novel multimode broadband directional diagram diversity microstrip antenna. The antenna comprises a first dielectric substrate, a second dielectric substrate, a metal floor with two slits, a feed network with two input ports and six rectangular radiation patches, wherein the first dielectric substrate and the second dielectric substrate are sequentially stacked from bottom to top, the metal floor is located on the upper surface of the first dielectric substrate, and the feed network is located on the lower surface of the first dielectric substrate; the six rectangular radiation patches are located on the upper surface of the second dielectric substrate and carry out coupled feeding according to the two slits. The antenna has the advantages of wide impedance bandwidth, wide radiation bandwidth, simple structure, low cost, directional diagram and the like.
Owner:SOUTH CHINA UNIV OF TECH
Implantable antenna system
ActiveCN110148832ASmall sizeSmall footprintRadiating elements structural formsAntenna earthingsPower flowRadiation bandwidth
The invention discloses an implantable antenna system. Firstly, double layers of circular Rogers dielectric substrates with the same thickness and size are adopted, the diameter of each circular Rogers dielectric substrate is the same as the diameter of a patch antenna and the diameter of a metal grounding plate, and coaxial feeding is conducted through the bottom. The patch antenna is arranged between the two layers of dielectric substrates and is composed of two metal bands and four arc-shaped metal bands which are perpendicular to each other, and two adjacent arc-shaped metal bands are respectively provided with short circuit nails to be connected with the ground, so that the following effects are achieved: the size of the antenna is greatly reduced while a current path is increased, and miniaturization is better realized; and different resonant modes are excited, the feed position is adjusted to realize a dual-band resonant effect, and the radiation bandwidth and the radiation efficiency are increased.
Owner:NANJING UNIV OF POSTS & TELECOMM
Ultra wide band medium antenna
PendingCN108598700AIncrease Radiation BandwidthImproving Impedance BandwidthRadiating elements structural formsAntennas earthing switches associationUltra-widebandRadiation bandwidth
The invention discloses an ultra wide band medium antenna which comprises a medium layer, a first copper clad layer, a second copper clad layer, a first vibration arm, a second vibration arm, a Balun,a feeder, a first vibration arm gap, a second vibration arm gap and a third vibration arm gap. The first vibration arm gap, the second vibration arm gap and the third vibration arm gap are respectively formed on the first vibration arm; the first vibration arm gap comprises a first gap, a second gap and a third gap; the first gap is vertically connected with the second gap; the third gap is connected with the second gap and is at a certain obtuse angle with the second gap; the second vibration arm gap is in parallel to the third gap; the third vibration arm gap comprises a fourth gap, a fifthgap, a sixth gap and a seventh gap; the fourth gap is connected with the fifth gap; the sixth gap is connected with the fifth gap; and the seventh gap is connected with the sixth gap. According to the invention, the first vibration arm gap, the second vibration arm gap and the third vibration arm gap are respectively formed on the first vibration arm, so that a radiation band width and an impedance frequency band width of the medium antenna are improved.
Owner:广东省安捷信通讯设备有限公司
Low-frequency radiation unit and antenna array
PendingCN113937493AIncrease Radiation BandwidthIncrease filter bandwidthSimultaneous aerial operationsRadiating elements structural formsRadiation bandwidthAcoustics
The invention discloses a low-frequency radiation unit and an antenna array. The low-frequency radiation unit comprises a feed device, a balun support device and a pair of mutually orthogonal half-wave vibrators, the radiation surfaces of the orthogonal half-wave vibrators are located on the same plane, each half-wave vibrator comprises two radiation arms, the inner side of each radiation arm is provided with a plurality of open-circuit branches, a matching resonator is arranged at the top end of the radiation arm, the balun supporting device comprises a feed transmission line, one end of the balun supporting device is connected with the feed device, the other end of the balun supporting device is connected with the orthogonal half-wave vibrator, and the orthogonal half-wave vibrator is electrically connected with the feed device through the feed transmission line. The radiator can have relatively high radiation bandwidth and filtering bandwidth, so that the influence of a low-frequency radiation unit on high-frequency radiation performance is effectively reduced, the performance of the antenna is guaranteed during nesting fusion array formation, and meanwhile, the electrical size of the antenna can be effectively reduced.
Owner:SUZHOU DONGSHAN PRECISION MANUFACTURING CO LTD
Antenna module and terminal
ActiveCN110867649AIncrease Radiation BandwidthImprove radiation efficiencyAntenna supports/mountingsRadiating elements structural formsRadiation bandwidthEngineering
The invention discloses an antenna module and a terminal, and belongs to the technical field of antennas. The antenna module comprises a first antenna, a coupling enhancement structure, a first substrate and a second substrate, wherein the first surface of the first substrate is opposite to the second surface of the second substrate, the first antenna is arranged on the first surface of the firstsubstrate, and the coupling enhancement structure is arranged on the second surface of the second substrate; the coupling enhancement structure comprises a radiation slot, and the radiation slot corresponds to the position of a current strong point on a radiator of the first antenna; the current strong point is the position with the maximum current on the radiator of the first antenna when the first antenna works in a first working mode; and the length extension direction of the radiation slot is perpendicular to the current direction on the radiator of the first antenna. According to the application, the current strong point on the first antenna is changed through self coupling of the coupling enhancement structure, so that the resonant frequency is changed, the radiation bandwidth of theantenna is expanded, and the radiation efficiency of the antenna is improved.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Antenna module, terminal equipment and manufacturing method of antenna module
ActiveCN111725617AImprove communication qualityReduce mutual interferenceRadiating elements structural formsAntenna arrays manufactureRadiation bandwidthTerminal equipment
The invention relates to an antenna module, terminal equipment and a manufacturing method of the antenna module. The antenna module is located on a conducting strip, and comprises one or more antennas, wherein a plurality of antenna radiators of a plurality of antennas are formed by different areas of the conducting strip, one antenna radiator of one antenna is composed of at least part of the conducting strip. The antenna module is advantaged in that a plurality of antenna radiators share one conductive sheet, the radiation area of a single antenna radiator can be increased, radiation efficiency and the radiation bandwidth of the antenna radiator are improved, the situation that the antenna radiator is affected by the environment is reduced, only one conducting strip is needed, multiple conducting strips do not need to be independently arranged to receive and transmit wireless signals of multiple frequency bands, then the space occupied by the antenna module in terminal equipment canbe reduced, and the space utilization rate of the terminal equipment is increased.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Radiation unit and base station antenna
PendingCN111555013AImproving Impedance BandwidthIncrease Radiation BandwidthAntenna supports/mountingsRadiating elements structural formsRadiation bandwidthImpedance bandwidth
The invention relates to the technical field of wireless communication, and provides a radiation unit and a base station antenna. The radiation unit comprises a radiator, a support and a parasitic body installed on the radiator through the support, wherein the support comprises an installation base used for being connected with the radiator and a plurality of supporting strips arranged on the side, which is away from the radiator, of the installation base, each supporting strip is provided with a plurality of positioning parts from top to bottom, the parasitic body is provided with a pluralityof positioning openings, and after the supporting strips penetrate through the corresponding positioning openings, the parasitic body is supported on the positioning parts at the same height. According to the radiation unit, the distance between the parasitic body and the radiator can be adjusted, the impedance bandwidth and the radiation bandwidth of the radiation unit are effectively improved,and the radiation unit can be compatibly applied to a 4G network and a 5G network.
Owner:MOBILE ANTENNA TECH SHENZHEN +5
Mid-infrared light radiation generation system and method based on difference frequency generation process
ActiveCN110579922AHigh radiation of mid-infrared lightHigh instantaneous bandwidthNon-linear opticsSignal lightLinear medium
The invention discloses a mid-infrared light radiation generation system and method based on a difference frequency generation process. The mid-infrared light radiation generation system comprises a pump light signal light generation module and a nonlinear medium module, and the non-linear medium module obtains bandwidth-broadened mid-infrared light radiation based on the difference frequency generation process and a superposition effect of different frequency bands of idler frequency light generated by signal light and pump light in non-linear crystals of different polarization periods. According to the invention, two or more cascaded second-order nonlinear crystals with different phase matching central wavelengths are adopted, the bandwidth of the generated mid-infrared light radiation can reach the sum of the phase matching bandwidths of all the second-order nonlinear crystals, the instantaneous bandwidth is wide, and the mid-infrared light radiation with high instantaneous bandwidth can be directly obtained without tuning. In addition, the mid-infrared light radiation generation system is simple in structure, free of a resonant cavity, low in design cost and easy to be mini andpractical.
Owner:HUAZHONG UNIV OF SCI & TECH
Electronic equipment and antenna device
ActiveCN113540808ASmall footprintGuaranteed normal transmissionRadiating elements structural formsAntennas earthing switches associationRadiation bandwidthEngineering
The embodiment of the invention provides electronic equipment and an antenna device. The antenna device comprises a metal main body, a signal emission source, at least one antenna radiator and at least one feeder line, a cavity is formed in the metal main body, each antenna radiator is suspended in the cavity, and the signal emission source is located outside the metal main body; the antenna radiator comprises a first surface and a second surface opposite to the first surface, the signal emission source feeds electricity to the second surface of the antenna radiator through the feeder line, and a plurality of gaps are formed in one surface, opposite to the first surface, of the metal main body, so that electromagnetic waves in the metal main body are emitted to the outside of the metal main body through the gaps. Compared with the prior art, electromagnetic wave energy generated by the cavity of the metal main body can be radiated to a greater extent, so that the radiation bandwidth of the antenna device is increased, and the height size of the antenna device is reduced while a certain radiation bandwidth is ensured.
Owner:HUAWEI TECH CO LTD
An implantable antenna system
ActiveCN110148832BSmall sizeSmall footprintRadiating elements structural formsAntenna earthingsRadiation bandwidthDielectric substrate
Owner:NANJING UNIV OF POSTS & TELECOMM
Antenna structure and electronic equipment
ActiveCN114069207AHigh bandwidthRealize Wifi6E communicationSimultaneous aerial operationsRadiating elements structural formsRadiation bandwidthRadiation mode
The invention relates to an antenna structure and electronic equipment. The antenna structure comprises a branch radiator, wherein the branch radiator comprises a plurality of first radiation modes; an annular radiator which surrounds the branch radiator and comprises a plurality of second radiating modes; a feed point and the grounding point, wherein one of the feed point and the grounding point is connected to the annular radiator, and the other of the feed point and the grounding point is connected to the branch radiator; and an antenna slot arranged between the branch radiator and the annular radiator, wherein the annular radiator and the branch radiator are coupled through the antenna slot to form a coupling radiation mode, and the coupling among the first radiation mode, the second radiation mode and the coupling radiation mode widens the radiation bandwidth of the antenna structure.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Near-infrared broadband luminescence erbium and thulium-co-doped bismuthate laser glass and preparation method thereof
The invention relates to near-infrared broadband luminescence erbium and thulium-co-doped bismuthate laser glass and a preparation method thereof. The glass comprises the following components in molar percentage: 53.6-59.8 mol% of Bi2O3, 10-20 mol% of B2O3, 10-20 mol% of SiO2, 10-20 mol% of Ga2O3, 0.8-1.2 mol% of Tm2O3 and 0.2-0.6 mol% of Er2O3. The glass which is prepared by utilizing a melting-cooling method is of glassy yellow and has uniform physical and chemical properties. The glass disclosed by the invention has the advantages of stable thermodynamic property and strong anti-devitrification ability. The Raman vibration spectrum of the glass shows that the strongest vibration peak is in the vicinity of 188-412cm-1. The probability of nonradiative transition of the energy level of rare earth ions is greatly reduced. The radiation bandwidth with the width of 165nm is obtained under pumping of a laser diode with 800nm wavelength and covered on an S plus C plus L wave band. The glass disclosed by the invention is suitable for preparation and application of near-infrared broadband luminescence rare earth ion-doped optical fiber materials.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Antenna module and terminal
ActiveCN110867649BIncrease Radiation BandwidthImprove radiation efficiencyAntenna supports/mountingsRadiating elements structural formsRadiation bandwidthSoftware engineering
The application discloses an antenna module and a terminal, which belong to the technical field of antennas. The antenna module includes: a first antenna, a coupling enhancement structure, a first substrate and a second substrate; the first surface of the first substrate is opposite to the second surface of the second substrate, and the first antenna is arranged on the second surface of the first substrate. On the first surface, the coupling enhancement structure is arranged on the second surface of the second substrate; the coupling enhancement structure includes a radiation slot, and the radiation slot corresponds to the position of the current strong point on the radiator of the first antenna; the current strong point is the first antenna The location where the current on the radiator of the first antenna is the largest when working in the first working mode; the length extension direction of the radiation slot is perpendicular to the current direction on the radiator of the first antenna. The coupling enhancement structure of the present application changes the current strength point on the first antenna through self-coupling, thereby changing the resonant frequency, widening the radiation bandwidth of the antenna, and improving the radiation efficiency of the antenna.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Smartphone antenna with metal frame
InactiveCN104022350BSmall sizeMeet the design requirementsAntenna equipments with additional functionsAntenna earthingsRadiation bandwidthCoupling
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Optical system for narrowing the bandwidth of radiation
InactiveUS20200333684A1Narrow bandwidthAltered propertyOptical devices for laserNon-linear opticsNonlinear opticsRadiation bandwidth
An optical system for narrowing the bandwidth of a beam of incident radiation includes an optical mixing unit configured to receive a first beam of radiation and a second beam of radiation. The first and second beams are spatially chirped and the first beam is inverted relative to the second beam. The optical mixing unit includes an optical mixing member, which includes a nonlinear optical medium to mix the first and second beams into an output beam having a narrower bandwidth than the beam of incident radiation.
Owner:VICTORIA LINK LTD
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