41results about How to "Change current distribution" patented technology

The invention discloses a miniaturized broadband filtering antenna based on a cross coupling structure and a compact MIMO filtering antenna formed by the miniaturized broadband filtering antenna, which belong to the technical field of microwave antennas. The filtering antenna comprises a first dielectric substrate, a metal floor and a lower-layer second dielectric substrate which have the same size and are tightly attached to one another. The center of the upper surface of the first dielectric substrate is provided with a rectangular metal patch and two U-shaped parasitic patches surrounding the rectangular metal patch. The upper surface of the second dielectric substrate is a metal floor with two gaps, and the lower surface of the dielectric substrate is in a terminal bending open-circuitmicrostrip feed structure with two transverse branches and short-circuit nails. The filtering antenna is used as a unit to form a 2 * 2 MIMO antenna. The MIMO filtering antenna provided by the invention is compact in structure, and has obvious advantages in bandwidth, size and filtering performance.

The invention relates to the design of a notch ultra-wideband antenna and belongs to the technical field of propagating and receiving electromagnetic waves. The invention provides a novel multi-notch ultra-wideband antenna with stop-band units simultaneously loaded to a feeder and a radiation patch; specifically speaking, an open slot of 1 / 4 wavelength is formed in the radiation patch and C-shaped half-wavelength open-circuit resonance units different in size are loaded at the two sides of the feeder, and therefore, a three-stop-band notch ultra-wideband antenna is realized; the three-stop-band notch ultra-wideband antenna is capable of filtering out interferences from WiMAX (Worldwide Interoperability for Microwave Access) (3.3-3.6GHz) and WLAN (Wireless Local Area Network) (5.15-5.35GHz, 5.725-5.825GHz) systems. The antenna has the advantages of independently adjustable frequency point of each stop-band and independently adjustable bandwidth of each stop-band. Simulation results and actual measurement results prove excellent multi-frequency filter characteristic of the antenna.

The invention discloses an ultra-wide band 5G MIMO (Multiple Input Multiple Output) antenna structure which comprises a PCB (Printed Circuit Board) and more than one antenna units, wherein the more than one antenna units are arranged on the PCB at intervals; the antenna units comprise feed units and grounded radiation units coupled with the feed units; the feed units correspond to positions of feeding points on the PCB; the grounded radiation units comprise a horizontal radiation body, a first vertical radiation body, a second vertical radiation body and an extra radiation body; the top end ofthe first vertical radiation body is connected to the middle of the horizontal radiation body; the bottom end of the first vertical radiation body is connected with a grounding point on the PCB; thetop end of the second vertical radiation body is connected to the end of the horizontal radiation body; a spacing exists between the bottom end of the second vertical radiation body and the PCB; the extra radiation body is connected to the middle of the first vertical radiation body. According to the antenna structure, all frequency bands of 6GHz below in 5G mobile communication can be effectivelycovered, and the requirement on antenna performance can be met.

The invention discloses an omni-directional ceiling antenna. The omni-directional ceiling antenna comprises a cone column-shaped radiation oscillator, a cone column-shaped reflector, a plate column-shaped bottom plate and an insulating medium ring, wherein the reflector comprises a first hollow cone and a first cylindrical ring, the flared end of the first hollow cone is connected with the first cylindrical ring, and the outer diameter of the first cylindrical ring is less than that of the first hollow cone; the bottom plate is provided with a second cylindrical ring, and the second cylindrical ring and the first cylindrical ring are connected in a sleeve mode to form a space isolating coupling structure; an insulating medium ring is arranged between the second cylindrical ring and the first cylindrical ring to separate the reflector from the bottom plate and support and fix the reflector and the bottom plate. The omni-directional ceiling antenna solves the problem that high-frequency signals of an ultra-wide-band indoor omni-directional antenna are gathered downward, enables the effective cover range of high-frequency signals to be expanded, enables indoor signals to be distributed more uniformly, enables the electromagnetic radiation intensity under the antenna to be lowered effectively and enables the indoor electromagnetic environment safety to be guaranteed.

A dual-polarized broadband antenna radiation device belongs to the technical field of mobile communication base station antennas and comprises a feeding connection seat, a group of radiating element arms and a feeding mechanism, wherein a feeding mechanism cavity is formed in the center of the feeding connection seat; the radiating element arms are distributed around the feeding connection seat; the feeding mechanism is inserted in the feeding mechanism cavity. The dual-polarized broadband antenna radiation device is characterized in that each radiating element arm comprises a first oscillator arm, a second oscillator arm and a radiating arm, wherein one ends of the first and second oscillator arms are connected with the top of the feeding connection base; the other ends of the first and second oscillator arms extend away from the feeding connection seat; one end of the radiating arm is connected with the other end of the first oscillator arm to form a first expansion end; the other end of the radiating arm is connected with the other end of the second oscillator arm to form a second expansion end; the first oscillator arm, the second oscillator arm and the radiating arm form a space which serves as a hollow cavity; the hollow cavity is rhombus-shaped; hollow gaps are trapezoid. The dual-polarized broadband antenna radiation device has the advantages that current distribution on the radiating element arms can be changed; the impedance change of the radiating element arms is slowed down; the weight is reduced and raw materials are saved.

The invention provides a wave beam direction adjustment circuit and method and electronic equipment. The wave beam direction adjustment circuit comprises an antenna, metal strips, electric tunable assemblies and a system ground unit, wherein the antenna is connected with the system ground unit, the metal strips are connected with the system ground unit via the electric tunable assemblies, and a preset distance is arranged between the metal strips and the antenna. With the wave beam direction adjustment circuit provided by the invention, the direction of a main wave beam of the antenna can be changed.

The invention belongs to the field of wireless signal transmission technology application, particularly relates to a dual-polarized omnidirectional metasurface antenna, and aims at solving the problem that a traditional micro-strip antenna is narrow in bandwidth and can hardly realize dual-polarization omnidirectional radiation. The metasurface antenna comprises a micro-strip feed structure 5, a lower dielectric substrate 4, a metal grounding plate 3, an upper dielectric substrate 2, a metasurface radiation structure 1 and a coaxial probe feed structure 6 which are sequentially stacked from bottom to top, wherein the metasurface radiation structure is in 90-degree rotational symmetry with the center of the upper dielectric substrate as the rotational symmetry center. The strongest current distribution positions of a horizontal omnidirectional radiation mode and a vertical omnidirectional radiation mode are separated through the structural design of the metasurface radiation structure, and a reasonable feed structure is adopted to ensure that the two polarization modes have the advantages of broadband radiation characteristic and high isolation. Finally, the design of a low-profile dual-polarized omnidirectional metasurface antenna is realized, and the antenna has the characteristics of wide band and high isolation.

The invention discloses a multifrequency antenna which comprises a lower metal earth plate, a medium substrate, a radiation patch and a feed connector. The medium substrate is arranged on the lower metal earth plate, the radiation patch is arranged on the medium substrate, a feed needle at the center of the feed connector is connected with the radiation patch, and an earth terminal of the feed connector is connected with the lower metal earth plate. The radiation patch is provided with four arc slots, the four arc slots are uniformly distributed on the same circumference, and rectangular slots are further arranged at ends of the arc slots along two symmetric lines of the four arc slots. The multifrequency antenna is easy in processing, manufacturing and mounting, is capable of realizing better impedance matching, can be applied to various systems such as GSM (global system for mobile communications) / 3G (the 3rd generation telecommunication) / WLAN (wireless local area network). By the aid of two pairs of arc slots and four pairs of convex slots on the outer side of the patch of a plane slot antenna, current distribution on the surface of the patch can be changed, three resonance points can be excited, and three-frequency operating characteristic can be achieved.

The invention discloses an LDMOS power transistor array structure comprising multiple LDMOS transistors which are identical in structure and connected in parallel. The adjacent LDMOS transistors are connected by sharing a source electrode or a drain electrode. The source electrodes and substrate lead-out ends of all the LDMOS transistors are connected in parallel via metal wires, and the drain electrodes are connected in parallel via the metal wires. The substrate lead-out end of each LDMOS transistor is arranged by adopting an X-shaped cross mode. The outmost periphery of a power transistor array is provided with the single drain electrode so that a drain electrode protective ring is formed and led out via the metal wires. The external side of the drain electrode protective ring is also provided with an isolating ring so that other devices are isolated. The invention also discloses a realization method of a layout of the LDMOS power transistor array structure. Reliability of the power transistor array can be enhanced (e.g. the HIC service life of the power transistor array is enhanced, safety working range of the power transistor array is enlarged, etc.) by the LDMOS power transistor array structure without changing technology.

The embodiment of the invention discloses a broadband helical antenna and a design method thereof. The antenna comprises a hollow cylinder and a spiral metal wire, wherein the inner layer of the hollow cylinder is a metal ground, the outer layer of the hollow cylinder is a magnetic material, the spiral metal wire is wound on the outer side of the magnetic material, the spiral metal wire is furtherprovided with a feeding point and a short circuit point, and the short circuit point is used for conducting the spiral metal wire and the metal ground. According to the broadband helical antenna provided by the embodiment of the invention, the short circuit point is added, the helical metal wire and the metal ground are connected, the current distribution can be changed, a new current path is formed to form a new radiation oscillator, a plurality of resonance modes are excited in a frequency band of 10-80MHz, a multi-band and broadband antenna is formed, and the broadband helical antenna hasa wide bandwidth. The antenna provided by the embodiment of the invention further comprises a radio frequency switch which is used for adjusting the disconnection or connection state of the short circuit metal sheet and the disconnection or connection state of the spiral metal wire so as to adjust the resonant frequency.

The invention provides a navigation frequency band-considered small-size and eight-frequency-band WWAN / LTE mobile phone antenna, which comprises an FR4 substrate (1), radiation metal sheets and a coupled feeding short-circuited belt (3). The radiation metal sheets comprise a feed belt (2) and the coupled feeding short-circuited belt (3). The feed belt (2) is printed on the upper surface of the FR4 substrate (1) and is used for generating a high-frequency resonant diaphragm including LTE 3500. The coupled feeding short-circuited belt (3) is formed by the sequential and vertical connection of the plurality of radiation metal sheets and is printed on the upper surface of the FR4 substrate (1). The coupled feeding short-circuited belt (3) is used for generating a low-frequency resonant diaphragm. A slotted-type metal grounding plate (6) is printed on the backside of the FR4 substrate (1) and facilitates the coverage of the full communication frequency band. According to the invention, based on the unique structural design of radiation metal sheets and the accurate positioning of an opening position on the slotted-type metal grounding plate, the current distribution is changed. Therefore, the mobile phone antenna can cover the LTE 3500 frequency band for the future 5G communication.

The invention discloses an antenna device and a mobile terminal. The antenna device comprises an antenna conductor, wherein the antenna conductor is provided with a radiation pattern, the radiation patter is provided with a first structure part, a second structure part, a third structure part and a fourth structure part, a first gap part is formed between the first structure part and the second structure part and is used for gap coupling, a second gap part is formed between the third structure part and the fourth structure part and is used for gap coupling, the fourth structure part is connected with the second structure part, the second structure part and the fourth structure part are divided by a feed unit, and a hollow hole is formed in the second structure part. By the antenna device, the technical problem how to form more resonance by arranging branches, gaps and the feed unit is solved, and a specific absorption ratio (SAR) value of an antenna is effectively reduced by holes formed in the branches.

The invention discloses a feed structure and a base station antenna. The base station antenna comprises a reflecting plate and at least one feed structure installed on the reflecting plate. The feed structure comprises a radiator, a feed balun and a feed panel. One end of the feed balun is connected to a radiator and the other end passes through the feed panel and is grounded. The end surface of the feed balun, which is grounded, is provided with at least one groove, and interrupted grounding is realized. During working, an excitation signal is converted and transmitted to the radiator by thefeed panel through the feed balun. In the invention, antenna radiation performance can be increased, an antenna cross polarization ratio can be improved, an antenna gain can be increased, base stationcoverage is improved and antenna electrical performance is optimized.

The embodiment of the application provides a PCB used in a wireless terminal and the wireless terminal. According to the embodiment of the application, the PCB comprises a resonant part which generates a resonant current, and the current distribution of the PCB can be changed, thereby enabling the isolation between at least antennas to be increased. In addition, the resonant current can improve the capability of electromagnetic radiation of the PCB, thereby enabling the radiation efficiency of each antenna to be increased, improving the wireless performance of the wireless terminal, effectively guaranteeing the wireless performance of the wireless terminal in various application scenes. Moreover, the wireless terminal provided by the embodiment of the application is simple, is easy to achieve, and is low in cost.

The invention relates to a BD B1 frequency band satellite navigation terminal antenna and a working method thereof. The antenna comprises a radiation plate and a reflection plate, wherein the centralparts of the radiation plate and the reflection plate are connected with a coaxial line, an upper radiation arm group connected with the inner center of the coaxial line is arranged on the upper sidesurface of the radiation plate, the lower side surface of the radiation plate is provided with a lower radiation arm group staggered 180 DEG with the upper radiation arm group and connected with the outer center of the coaxial line, the upper radiation arm group comprises two upper radiation arms staggered 90 DEG and connected with each other through one inward ends, the lower radiation arm groupcomprises two lower radiation arms staggered 90 DEG and connected with each other through one inward ends, four vertical metal columns distributed in a rectangular shape are further connected betweenthe radiation plate and the reflection plate, and radiation patches corresponding to the vertical metal columns in position in an up-down one-to-one mode are arranged on the lower side surface of theradiation plate. According to the antenna, a coaxial line feeding method is adopted, the upper layer is connected with the inner center of the coaxial line, the lower layer is connected with the outercenter of the coaxial line, a 90-DEG phase difference is generated, the circularly polarized radiation is achieved, the coupling effect is achieved through the short-circuit patch and the radiation arm, and the bandwidth of the antenna can be increased.

The invention belongs to the field of wireless signal transmission technology application, and particularly provides a horizontally-polarized omnidirectional metasurface antenna to simultaneously meet the requirements of broadband, miniaturization and simple structure. The antenna comprises a micro-strip feed structure 5, a lower dielectric substrate 4, a metal grounding plate 3, an upper dielectric substrate 2 and a metasurface radiation structure 1 which are sequentially stacked from bottom to top, wherein the metasurface radiation structure 1 is composed of four square patches A and twelve square patches B, the four square patches A are arranged in the center of the upper dielectric substrate in a 2 * 2 array, and the twelve square patches B are arranged around the four square patches A. The strongest current distribution position of a horizontal omnidirectional polarization mode is always fixed on a specific patch through the structural design of the metasurface radiation structure, and a reasonable feed structure is arranged to ensure that the desired horizontal-polarization omnidirectional radiation mode is efficiently excited in a broadband range.

The invention discloses a novel UWB (Ultra Wide Band) antenna with a tri-wave trapping characteristic. The novel UWB antenna is characterized by comprising a dielectric substrate , wherein metallic conductor surfaces are printed on the same side of the dielectric substrate; a rectangular radiating element structure, a coplanar waveguide feeder line and incomplete ground planes are positioned in the dielectric substrate; three similar U-shaped grooves are etched in the rectangular radiating element, so that such a structure can generate trapped waves of three frequency bands; the left and right sides of the feeder line are provided with the partial ground planes; a micro coplanar waveguide feeding mode is adopted for feeding.

The invention discloses a dual-polarized rectifying antenna based on a short-circuit needle structure. The dual-polarized rectifying antenna comprises a receiving antenna and a rectifying circuit, wherein the output end of the receiving antenna is electrically connected with the input end of the rectifying circuit; the receiving antenna is a microstrip antenna and includes a radiation patch, a substrate, a ground plane and a coaxial feed conductor pin; the radiation patch is disposed above the substrate; the ground plane is disposed on the bottom surface of the substrate; one end of the coaxial feed conductor pin is connected to the radiation patch; the other end of the coaxial feed conductor pin is connected to the ground plane through the substrate; the edge of the radiation patch is provided with a metal short-circuit needle; one end of the short-circuit needle is connected to the radiation patch; and the other end of the short-circuit needle is connected to the ground plane throughthe substrate. The dual-polarized rectifying antenna can maintain the high gain of a RF receiving antenna, the high output voltage of a rectifier and the multiple directions of receiving RF energy atlow input power.

The invention discloses a ceramic antenna structure which is fixedly connected on a circuit board of a portable electronic device; the ceramic antenna structure comprises a carrier, a radiating element, a grounding element, an inputting element and a fixing needle; a first and a second side surfaces and a first end and a second end which are connected with the first side surface and the second side surface are arranged on the carrier. A penetrating hole is arranged on the carrier, and a first metal pattern is arranged at the position of the edge of the penetrating hole of the first side surface; the radiating element is attached on the first side surface of the carrier, and an outer edge part is arranged on the radiating element. The grounding element and the inputting element are electrically connected with the outer edge part of the radiating element at the connecting position of the first side surface and the second end and are extended to the second side surface. The fixing needle is arranged in the penetrating hole of the carrier in a penetrating way and is electrically connected with the first metal pattern. After the fixing needle penetrates through the penetrating hole, and the part of the fixing needle, penetrating out of the carrier, penetrates a through hole of the circuit board and is fixedly connected with the circuit board.

The invention relates to an electromagnetic metamaterial patch antenna for radio frequency energy collection, which comprises a dielectric substrate, a radiation patch, a coaxial line, a grounding plate, a microstrip line electromagnetic metamaterial unit, an impedance matching adjusting section and a lumped port, the radiation patch and the impedance matching adjusting section are arranged on the front surface of the dielectric substrate, and a microstrip line electromagnetic metamaterial is arranged on the back surface of the dielectric substrate. The upper and lower surfaces have good feed and electromagnetic weak coupling with the broadband characteristics can be realized. The microstrip line electromagnetic metamaterial unit is equivalent to an LC resonance circuit, inductance resonance and capacitance resonance are in the same frequency, current distribution on the radiation patch is changed, field distribution of a natural mode of the radiation patch is changed, and multi-band radio frequency signal receiving is achieved. The antenna is simple in structure, is small in size, is good in frequency characteristic, and is very high in practical value.

The invention provides an antenna structure, a terminal and a processing method of the terminal. The antenna structure comprises a first antenna unit and a second antenna unit, and the tail end of a first coupling line of the first antenna unit and the tail end of a second coupling line of the second antenna unit are close to each other and are coupled. The terminal comprises the antenna structure, a transceiver, a first radio frequency transmission line and a second radio frequency transmission line, and the transceiver is connected with the first antenna unit through the first radio frequency transmission line and connected with the second antenna unit through the second radio frequency transmission line. The processing method of the terminal comprises the following steps: transmitting a first transmitting signal or receiving a first receiving signal through a first antenna unit, and transmitting a second transmitting signal or receiving a second receiving signal through a second antenna unit. According to the antenna structure, the terminal and the processing method of the terminal, the isolation degree between the antenna units is improved.

The invention discloses a high gain microstrip antenna with a short circuit pin. The high gain microstrip antenna with a short circuit pin comprises an antenna, wherein the antenna comprises a radiation patch with a circular transverse profile, a dielectric substrate, short circuit pins, a feed ground and a feed conductor pin, wherein the feed conductor pin and the radiation patch are arranged coaxially; the radiation patch is closely fastened to the upper surface of the dielectric substrate; the feed ground is arranged on the bottom surface of the dielectric substrate; one end of the feed conductor pin is connected to the radiation patch, and the other end of the feed conductor pin is connected to the feed ground after penetrating the dielectric substrate; the number of the radiation patch is 1, and the number of the short circuit pins is 14; the ratio between the distance from the short circuit pins to the center of circle of the radiation patch and the radius of the radiation patchis 0.7-0.8; and the 14 short circuit pins are uniformly arranged on the edge of the radiation patch in a ring shape. The high gain microstrip antenna with a short circuit pin can further increase theantenna gain and can improve the radiation performance.

The invention discloses a mobile terminal capable of reducing interference of an antenna to a battery protection board. The mobile terminal comprises a printed circuit board and the antenna and a battery which are respectively and electrically connected to the printed circuit board; the battery comprises a cell and the battery protection board; and the cell is electrically connected to the printed circuit board by the battery protection board. A first side edge of the printed circuit board, which is adjacent to the battery protection board, is provided with a protection groove; and the protection groove runs through the printed circuit board and is provided with an opening portion towards the battery protection board. Therefore, according to the mobile terminal provided by the invention, current distribution on the printed circuit board is changed by the protective groove, so that coupling between the printed circuit board and the battery protection board is controlled, and interference of the printed circuit board to the battery protection board is reduced.

The invention discloses a graphitizing cathode process, which comprises selecting and mixing delayed petroleum coke, pitch coke, after calcinations, fragmenting and sieving, adding hard pitch binder after mixing, pugging, machining charcoal rough shape of electrobath cathode, baking to make binder pitch carbonizing, making graphitizing cathode charcoal block. The invention has good mechanical, electrical , thermal property, and costs low, is especially suitable for large scale electrolytic cell.