74results about How to "Guaranteed radiation performance" patented technology

The invention discloses a method, a control device and a wireless terminal for reducing the radiation hazard of the wireless terminal, belonging to the field of wireless radiation protection, wherein the method for reducing the radiation hazard of the wireless terminal comprises the following steps: using the control device to detect whether an antenna of the wireless terminal is approached by an object or not; and using the control device to adjust the output power of a wireless terminal transmitter connected with the antenna to the output protection power and reduce the specific absorption rate value of the antenna to the set value if the antenna is detected to be approached by the object. The embodiment of the invention can reduce the radiation of the wireless terminal to a human body. The technical scheme is applicable to wireless communication terminals.

The invention discloses a planar-broadband dual-polarization base station antenna and belongs to the field of mobile communication base station antennae. The planar-broadband dual-polarization base station antenna mainly solves the problems that an existing base station antenna is complex in structure and has difficulty in being integrated with other devices. The planar-broadband dual-polarization base station antenna comprises radiation oscillators (1), feed baluns (2), a baffle board (3), coaxial cables (4), supporting columns (5) and a dielectric material plate (6). The radiation oscillators (1) are dual-polarization planar oscillators at +/-45 degrees, and the feed baluns (2) are planar feed baluns at +/-45 degrees. The radiation oscillator at -45 degrees and the feed balun at +45 degrees are printed on the upper surface of the dielectric material plate (6), and the radiation oscillator at +45 degrees and the feed balun at -45 degrees are printed on the lower surface of the dielectric material plate (6). The dielectric material plate (6) is fixed to the square baffle board (3) through the supporting columns (5). According to the planar-broadband dual-polarization base station antenna, planarization of the radiation oscillators and the feed baluns are achieved, meanwhile, the structure of the baffle board is simplified, and a stable directional diagram characteristic can be obtained in broadband.

The invention discloses a low sidelobe level series-fed microstrip antenna with non-uniform array element distance. Beam width, an array element size and the array element distance are used as constraint condition inputs, and the distance and the relative amplitude of an antenna array element, which are acquired, are optimized by a differential evolution algorithm. Compared with a series-fed microstrip antenna, the series-fed microstrip antenna has the advantages of lower sidelobe level and narrow beam width, and moreover, the conversion between the low sidelobe level and the beam width can be achieved by the differential evolution algorithm.

The invention provides a wideband radar cross-section reduction slot array antenna based on hybrid super-surface. The antenna comprises a lower dielectric plate (1) and an upper dielectric plate (2),wherein second and third dielectric plates (3, 4) are sequentially and closely attached above the upper dielectric plate, and fourth, fifth and sixth dielectric plates (5, 6, 7) are sequentially placed at different intervals above the third dielectric plate; the upper surfaces of the second and third dielectric plates are respectively printed with L-shaped metal patch units (31, 41) in checkerboard type arrangement; the lower surface of the fourth dielectric plate is respectively printed with an impedance structure (51) and a metal patch unit (52) in checkerboard type arrangement; the lower surface of the fifth dielectric plate (6) is printed with a plurality of strip metal patches (61); and the upper and lower surfaces of the sixth dielectric panel (7) are respectively printed with the metal patch unit (52) and the impedance structure (51) in checkerboard type arrangement. The wideband radar cross-section reduction slot array antenna has good scattering characteristics and realizes effective reduction of the cross-band single-station and double-station radar cross sections in the slot array antenna.

The invention provides a dual polarization high gain MIMO antenna based on aperiodic artificial magnetic conductor structure, the antenna is formed by double-layer-stacked dielectric substrate and comprises a patch antenna which is printed on the upper surface of upper layer of the dielectric substrates, a metal floor which is printed on the lower surface of lower layer of the dielectric substrates, an artificial magnetic conductor reflective plate which is printed on the upper surface of lower layer of the dielectric substrates, four coaxial feed probes which insert into the artificial magnetic conductor reflective plate and the upper surface of the dielectric substrates from the lower surface of the lower layer of the dielectric substrates, wherein the probes are connected with the cross patch antenna; the patch antenna is a cross structure, the artificial magnetic conductor reflective plate is divided into a plurality of artificial magnetic conductor units which are in different sizes and is arranged in central symmetry, and each artificial magnetic conductor unit is a rectangular metal patch. The antenna can realize radiation characteristics of dual polarization, high gain, high efficiency and high isolation.

The invention provides a multi-frequency base station antenna and an antenna feed system, and relates to the technical field of communication. The multi-frequency base station antenna comprises a reflecting plate, at least one high frequency radiation array and at least one low frequency radiation array; the high and low frequency radiation arrays are arranged on the reflecting plate in parallel;each high frequency radiation array comprises high frequency radiation units, and slits exist are arranged between the high frequency radiation units and the reflecting plate; the low frequency radiation array comprise low frequency radiation units, and a radiation arm of each low frequency radiation unit includes a structure whose shape is similar to that of the Chinese character chuan (which means string); and the structure includes two wide end portions and a narrow intermediate portion. According to the multi-frequency base station antenna and antenna feed system, unfavorable coupling between the high and low frequency radiation units can be weakened, high and low radiation performances are maintained, and a radiation directional diagram of the high and low frequency arrays can be improved without increase of the overall size and thickness of the antenna.

The invention discloses a parameter design method for a quasi-uniform array element spacing millimeter wave series-feed microstrip antenna with a low side lobe level. Electromagnetic field full wave simulation software and a DEA (Differential Evolution Algorithm) are combined to carry out the joint optimization of an antenna parameter. Under a situation that a constraint condition is given, the optimal solutions of antenna array element spacing, the resonance length of the array element and array element width are obtained. The DEA is adopted, and wave beam width, a wave beam deflection angle,the antenna array element spacing, the resonance length of the array element and the relative width of the array element are input as optimized constraint conditions. The series-feed microstrip antenna realized by the parameter has the characteristic of low side lobe level. Compared with an equal-spacing Chebyshev ideal point source array, the quasi-uniform array element spacing series-feed microstrip antenna is characterized in that the side lobe level of the quasi-uniform array element spacing series-feed microstrip antenna is close to the side lobe level given by a Chebyshev theory resolution under a situation of the same wave beam width.

The invention relates to an electronic tag. The invention solves the technical problems of reducing the influence of a background material on an antenna and improving the environment adaptability of the electronic tag. The invention discloses the electronic tag, wherein the structure of the electronic tag comprises a substrate and a micro-strip antenna, and the micro-strip antenna is arranged on the substrate. The electronic tag is characterized in that: the substrate comprises a supporting layer, a metal patch layer, a medium layer and a metal ground; the micro-strip antenna is made on the front side of the substrate, the metal patch layer and the metal ground are attached to two sides of the medium layer respectively, the metal patch layer is contacted with the supporting layer, and the metal ground is positioned on the back of the substrate; and the metal patch layer consists of metal sheets mutually isolated on the front side of the medium layer, the metal ground consists of metal plates on the back of the medium layer, and each metal sheet is connected with the metal plate through a conductor passing through the medium layer. The electronic tag effectively weakens the influence of the complex background material such as metal, liquid and the like on the resonance frequency of the antenna, and can be used as a passive electronic tag of an ultra high frequency (UHF) band.

Embodiments of the invention disclose an antenna assembly and a terminal. The antenna assembly comprises a substrate, a plurality of first antenna units and a plurality of second antenna units; the multiple first antenna units and the multiple second antenna units are both arranged on the substrate; the multiple first antenna units are arranged in sequence in a first direction to form a first antenna array; the multiple second antenna units are arranged in sequence in a second direction to form a second antenna array; and the first direction and the second direction are not parallel to each other. According to the schemes, the antenna arrays are set from two different directions to realize directional radiations of two angles, so that the overall radiation performance of the antenna is ensured while multiple-input and multiple-output is realized.

The invention provides an IE-grade power cable for a third-generation passive nuclear power plant gentle environment and a production method. The IE-grade power cable for the third-generation passive nuclear power plant gentle environment comprises a plurality of wire cores. Each wire core comprises one or more conductors, the outer wall of each conductor is wrapped by first wrapping tape, and inner insulation layers and outer insulation layers are arranged outside the first wrapping tape in an extruding mode, and the first wrapping tape is wrapped by second wrapping tape. The wire cores and one or more filling cores form a cable core in a stranding mode; the cable core is provided with a wrapping tape layer, a filling layer, an inner shielding layer, an outer shielding layer, a wrapping layer and a protection sleeve layer from inside to outside in sequence. The production method of the IE-grade power cable comprises the following steps of conductor stranding, conductor wrapping, inner insulation layer and outer insulation layer extruding, inner insulation layer and outer insulation layer irradiation crosslinking, insulation wrapping, wire core and filling core cabling, filling layer extruding, shielding, protection sleeve layer extruding and protection sleeve layer irradiation crosslinking.

The invention provides an antenna device and electronic equipment. The antenna device comprises a bearing main body and a first antenna module, wherein the first antenna module is fixed relative to the bearing main body, the bearing main body is provided with a first clearance region and a non-clearance region, the non-clearance region is connected with the first clearance region, the first antenna module comprises a first radiation body, a first energy storage part and a first feeding source which are sequentially and electrically connected, at least one part of the positive projection of thefirst radiation body on the bearing main body is arranged on the first clearance region, at least one part of the positive projection of the first energy storage part on the bearing main body is arranged on the non-clearance region, the first feeding source is used for providing feeding energy for the first energy storage part, the feeding energy is stored by the first energy storage part, and the first radiation body is simulated to radiate a signal according to the stored feeding energy. By the antenna device, the occupancy space of the first antenna module on the clearance region is reduced, the occupancy space of the first antenna module on the non-clearance region is expanded, the antenna size is favorably optimized, and the radiation performance of the antenna is ensured.

The invention is concerned with the multi-frequency antenna, includes the radial lamella, the ground plate parallel distance with the radial lamella, the resonant cavity and the two conductive chip allocate in between the space of the radial lamella and the ground plate; the radial lamella is in 'Z' shape with the first metal chip and the second metal chip expanding to different direction where the first conductive chip expending downwards from the side of the first metal chip as the feed-in terminal, and the second conductive chip expending downwards from the side of the second metal chip to connect with the ground plate electrically as the grounding terminal, and the first metal chip expending of the side of the first conductive chip connecting with the second metal chip of the side of the second conductive chip.

The invention relates to the technical field of antennas, in particular to a monopole label antenna. The monopole label antenna comprises a back buckle-type metal reflection plate, a dielectric substrate, a monopole, a metal round ring and a feeding part, wherein the back buckle-type metal reflection plate is arranged at the bottom of the monopole label antenna and is connected with the monopole via the feeding part, the dielectric substrate sleeves the monopole, and the metal round ring is arranged on an upper surface of the dielectric substrate. The monopole is used as a main body of the antenna, works within a broadband range of 2.4-2.5GHz and covers a 2.4G band of a WIFI band, and moreover, the omnibearing performance of the antenna can be achieved by the monopole. The monopole label antenna is simple and compact in structure and low in processing cost, and is easy to process and simple to assemble.

The invention discloses a substrate integrated waveguide slot feed microstrip array antenna, which comprises an upper dielectric substrate and a lower dielectric substrate, wherein the upper dielectric substrate is located right above the left side of the lower dielectric substrate and is connected with the lower dielectric substrate; the upper surface of the upper dielectric substrate is printedwith 4*12 periodically arranged circular radiation patches, and each circular radiation patch is provided with cross-shaped grooves with different lengths; the lower dielectric substrate is a substrate integrated waveguide slot array, good conductors are printed on the upper surface and the lower surface of the lower dielectric substrate, slots in one-to-one correspondence with the cross-shaped grooves are formed in the upper surface, and a plurality of metallized through holes and coaxial feed ports are formed in the middle of the lower dielectric substrate; in addition, the dielectric constants of the upper and lower dielectric substrates are different. The array antenna is compact in structure and reasonable in design, has the characteristics of high feed performance, high gain, miniaturization and the like, and can be used for obstacle avoidance millimeter-wave radar of a multi-rotor unmanned aerial vehicle platform.

The invention provides a vehicle-mounted built-in dual-band dual-circularly-polarized mixed dielectric resonator antenna. The antenna comprises a dielectric resonator, a dielectric substrate, a metal ground plane and a microstrip line, the microstrip line is arranged in the center of the bottom of the dielectric substrate, the metal ground plane is arranged on the surface of the dielectric substrate, and a gap is formed in the center of the metal ground plane and is perpendicular to the bottom microstrip line. The dielectric resonator is arranged right above the gap; the dielectric resonator comprises a prismoid, a mixing cylinder is arranged on the upper portion of the prismoid, the mixing cylinder is a hollow cylinder, liquid is arranged in the hollow cylinder, and the cylinder of the hollow cylinder is a metal dielectric medium. Triangular prism-shaped notches are formed in opposite angles of the upper part and the lower part of the prismoid; double frequency bands are obtained through slot coupling feeding, a basic mode and a high-order mode, the hybrid antenna is realized by adding liquid into a hollow hollow cylindrical part, the high-frequency bandwidth is expanded, the low frequency is hardly influenced, the gain of the antenna is improved after water is added, and the gain is increased when the water is increased at high frequency.

The embodiment of the invention discloses an antenna and a mobile terminal. The antenna comprises a metal routing unit and a closed-loop breakpoint-free metal middle frame. The metal routing unit arranged inside a mobile terminal is connected with the closed-loop breakpoint-free metal middle frame of the mobile terminal and is in electrical conduction and the metal routing unit that is also connected with a circuit board arranged inside the mobile terminal electrically by a feeding point is used for adjusting a resonant frequency of an antenna; and the circuit board is arranged between a structural support metal plate arranged inside the mobile terminal and a metal back cover of the mobile terminal and the structural support metal plate and the metal back cover are connected and are in electrical conduction, and the structural support metal plate and the metal back cover serve as reference grounds of the mobile terminal. The closed-loop breakpoint-free metal middle is used as an irradiator of the antenna and is used for transmitting and receiving a signal. Therefore, on the premise that the closed-loop breakpoint-free metal middle frame and the metal back cover are used by the mobile terminal, the radiation performance of the antenna can be ensured.

The invention discloses a dielectric resonator millimeter wave module and a communication terminal. The dielectric resonator millimeter wave module comprises a feed structure and a radiation structure; the radiation structure comprises an integrated array; the integrated array comprises a plurality of medium units connected in a certain mode; the feed structure comprises feed units in one-to-one correspondence with the dielectric units; And the dielectric units and the feed units which are in one-to-one correspondence are mutually coupled. According to the dielectric resonator millimeter wavemodule and communication terminal of the invention, the multi-unit antenna array is integrated, and only one-time alignment installation is needed when the multi-unit antenna array and a PCB are assembled, and therefore, the introduction of a plurality of alignment errors into a plurality of antenna units is avoided, the impedance mismatch of the plurality of antenna units is avoided in a millimeter wave frequency band, and the radiation performance of the antenna is guaranteed.

The invention provides an MIMO antenna and mobile communication equipment. The MIMO antenna comprises a dielectric plate, a grounding plate, at least two monopole antennas and microstrip feeder lines,wherein the grounding plate and the monopole antennas are arranged on the front surface of the dielectric plate; the microstrip feeder lines are consistent with the monopole antennas in number and are arranged on the back surface of the dielectric plate; and the grounding plate is provided with slits with the same number as the monopole antennas, the monopole antennas are arranged in the slits ina one-to-one correspondence manner, projections of the microstrip feeder lines and the monopole antennas on the dielectric plate are intersected, and the slits, the monopole antennas and the microstrip feeder lines form an antenna group. The slot antenna is formed by forming the slot in the grounding plate, the monopole antenna is arranged in the slot, and the isolation degree between the antennagroups is increased while the radiation performance of the antenna is ensured by utilizing an antenna orthogonal mode and a polarization diversity principle; in addition, the microstrip feeder line is arranged to feed the monopole antenna, so that the radiation performance of the antenna is improved. The problem of how to realize a high-isolation multi-antenna system in a small space is solved.