42 results about "Radiation bandwidth" patented technology

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.

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.

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.

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.

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.

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.

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.

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 0.004λ_g and 0.06λ_g for forming a radiation bandwidth with high selectivity, where λ_g 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.