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 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 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 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 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 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.