128results about How to "Increase Radiation Gain" patented technology

An antenna unit formed in the shape of a hollow box comprising (a) a substrate forming the front side of the antenna unit, (b) a first microstrip antenna array formed on the substrate, (c) a second microstrip antenna array formed on the substrate, (d) a ground plane forming the rear side of the antenna unit, and (e) a plurality of periodic filters formed on the ground plane. The periodic filters are formed by etching a series of circular patterns, or holes, through the ground plane. The periodic stop band filters provide for improved isolation between the microstrip antenna arrays, without the need for adding additional costly or space consuming components.

An antenna for receiving and/or transmitting circularly and/or linearly polarized RF signals includes a radiation element, a ground plane, a dielectric substrate, and a feed line. The radiation element is disposed on a pane of glass. The radiation element defines a slot having a first leg and a second leg forming the shape of a cross for generating the circular and/or linear polarization. The cross-shaped slot includes a center point. The ground plane is disposed substantially parallel to and spaced from the radiation element. The dielectric substrate is sandwiched between the radiation element and the ground plane. The feed line extends within the dielectric substrate and is electromagnetically coupled with the radiation element and the ground plane. The feed line terminates at a distal end short of the center point of the slot. That is, the feed line does not cross the center point. The antenna is compact in size and generally conformal to the pane of glass.

A wireless access gateway for communication of wave signals at radio frequencies within a frequency band, includes an access gateway enclosed in a housing including a bottom wall and a main circuit board overlying the bottom wall and having an upper surface substantially parallel to the bottom wall. The gateway is equipped with an antenna system including at least two antennas: a first linearly polarized antenna for propagating a first wave signal along a first polarization axis including a first radiating element extending along a first longitudinal axis lying on a first plane substantially parallel to the base plane, and a second linearly polarized antenna for propagating a second wave signal along a second polarization axis oriented perpendicularly to the first polarization axis, the second antenna including a second radiating element extending along a second longitudinal axis lying on a second plane oriented perpendicularly to the first plane. The first and second antennas are positioned relative to each other at a distance of at least λ/2, where λ is the wavelength corresponding to a radio frequency within the frequency band.

The invention provides a millimeter wave miniaturized multichannel transceiving component device and a phase compensation method thereof. The transceiving component device of the invention comprises a transmitting branch, a receiving branch, a switch, a power splitting circuit and a metal box body, belonging to the radar component technical field. The transceiving component device is realized by a millimeter wave periplanatic integrated circuit based on MMIC (millimeter wave monolithic integrated circuit) technology, and no source phase-shift device is arranged inside a transceiving component. The interchannel phase compensation method of the invention is to utilize a micro strip loading high dielectric constant medium which plays a part in cascade connection in the transceiving component. Phase error compensation within the range of 0 to 360 DEG can be realized by selecting different loading media, and the amplitude consistency is not affected. The invention has the advantages of simple and convenient debugging, skillful design, miniaturization and so on and is a transceiving component device with strong operability and effectiveness and a phase compensation method thereof.

A mobile terminal has an electromagnetic interference (EMI) shielding region set at an upper side of a main body part where an internal antenna is mounted. The internal antenna may be mounted on a main printed circuit board (PCB) in order to obtain a desired radiation gain. Such a shielding region alleviates the need to use metallic shielding material or EMI spraying throughout many parts of the terminal. In addition, in order to maximize wireless characteristics of the built-in antenna, a PCB ground is removed from a folder part and a FPCB connector is moved to a position along a side of a terminal display. With this structure, degradation of radiation characteristics of the antenna due to metal components installed around the built-in antenna can be prevented, and thus a stable radiation gain of the terminal antenna can be obtained.

The invention discloses a novel neighbor finding method based on a directional antenna. The neighbor finding method comprises the following steps that binary system numbering is carried out on nodes, the antenna scanning direction is numbered, one node determines a receiving and sending mode according to the binary system number of the node, determines the scanning sequence according to the receiving and sending mode and carries out scanning at the neighbor finding stage according to the scanning sequence, and if a pair of receiving and sending nodes successfully come to a handshake protocol, it is shown that the neighbor finding process is successful. The novel neighbor finding method solves the problem of neighbor finding of the non-central networking under the condition of the directional antenna, the advantages of the high interference resistance and high space reused ratio of the directional antenna can be exploited to the full the flexible characteristic of entering and existing the network of the non-central networking are fully utilized, and the method has wide application prospects.

The invention provides a vehicular radar array antenna. The vehicular radar array antenna comprises a radiation fin array and an impedance matching network arranged on the same plane, and the radiation fin array is configured in a bilateral symmetry manner by taking the impedance matching network as the center axis. According to the invention, a novel feed network is employed, based on the microstrip line impedance match and phase shift principle, relevant parameter demands of the antenna radiation array are achieved by means of a simple implementation form, and furthermore product optimization is achieved. The simulation of the vehicular anticollision radar array antenna and the debugging of the antenna sample are convenient and fast, by arranging the impedance matching network and the array antenna in the same plane, the whole radar antenna profile is reduced, and the duty ratio of the antenna feed part in the whole vehicular radar is effectively reduced. By employing the novel design concept and design method, a conventional feed power splitting network structure with a complicated back side is broken through, electromagnetic interference on other radio frequency devices is effectively reduced, and the vehicular radar array antenna has a deep business application value in the actual engineering.

The invention provides a back cavity slot antenna dual-frequency millimeter wave antenna based on a substrate integrated waveguide (SIW). The antenna comprises a radiation layer, a feed layer and a composite conversion structure, wherein the radiation layer is composed of a first metal coating and a first rectangular dielectric plate, the first metal coating is etched with two mutually parallel rectangular radiation slots, the first rectangular dielectric plate is provided with first metalized through holes for forming a circular SIW resonant cavity; the feed layer is composed of a second rectangular dielectric plate, a second upper metal coating and a second lower metal coating, the second rectangular dielectric plate is provided with second metalized through holes distributed in a gradually changing U-shaped manner so as to form a substrate integrated waveguide, and the second upper metal coating is etched with a rectangular coupling slot for slot coupling feed. The back cavity slotantenna dual-frequency millimeter wave antenna realizes the performance of millimeter wave dual-band radiation, and solves a technical problem that the dual-frequency millimeter wave antenna in the prior art is narrow in impedance bandwidth, low in antenna radiation gain and efficiency and complex in feed structure.

An antenna system includes a substrate, a ground on the substrate, a first radiator having a helical shape near a side of the substrate and having a central axis substantially in parallel to a side of the ground, and a high frequency circuit electrically connected to a part of the first radiator. In the antenna system, ground-induced degradation of antenna gain can be reduced, and matching can be performed at an operating frequency through adjustment of a winding of the first radiator. Consequently, the radiation gain of the antenna system can be improved without an antenna matching circuit.

The invention provides a hybrid AMC (Artificial Magnetic Conductor) tessellate structure loaded SIW (Substrate Integrated Waveguide) cavity-backed slot antenna, and belongs to the technical field of microwave antenna. The hybrid AMC tessellate structure loaded SIW cavity-backed slot antenna is a three-layer printed circuit board PCB structure, and includes a radiation slot, an SIW cavity and a periodic artificial magnetic conductor AMC surface with an opposite reflection phase. The hybrid AMC tessellate structure loaded SIW cavity-backed slot antenna utilizes the backward direction scattered wave constant amplitude inverse-phase offset principle to realize antenna RCS (Radar Cross-Section) suppression of X, K and Ku wave bands. Besides, the SIW cavity-backed structure can effectively reduce the profile size of the antenna, and the radiation characteristic of the slot antenna can generate enhanced effect because of influence of the periodic surface. The hybrid AMC tessellate structure loaded SIW cavity-backed slot antenna can be applied to boat-carrying, airborne, and vehicle communication systems, and can also be applied to an intelligent skinning system for realize the functions of stealth and communication.

The invention discloses a single-feed circularly polarized dielectric resonator antenna, comprising a dielectric substrate, wherein a microstrip line is arranged on a lower surface of the dielectric substrate, a metal large-scale stratum is arranged on an upper surface of the dielectric substrate, and the metal large-scale stratum is provided with a coupling groove for coupling and feeding with the microstrip line; a top layer radiating element comprising a striped dielectric resonator and a hollow double-layer dielectric resonator; Wherein the double-layer dielectric resonator is arranged onthe metal large-scale formation and covers the coupling groove; a tape dielectric resonator is arranged on that metal large-scale formation, and in a hollow region located in the double layer dielectric resonator, wherein the strip dielectric resonator is formed by rotating a preset angle in a counterclockwise direction from a top-down view angle about a center point of the strip dielectric resonator in a horizontal plane from a direction perpendicular to a microstrip line so as to realize conversion from a linearly polarized wave to a circularly polarized wave. The antenna of the invention has high gain, low profile and wide operating bandwidth.

The invention belongs to the technical field of antenna design, and particularly relates to a multi-octave ultra-wideband antenna and a conformal array antenna. The multi-octave ultra-wideband high-isolation antenna comprises a dielectric substrate, a feed structure and metal radiation patches attached to the front surface and the back surface of the dielectric substrate; the metal radiation patches on the front surface and the back surface of the dielectric substrate are gradual patches of the same structure and jointly form an antipodal Vivaldi antenna, and the two metal radiation patches are symmetrically distributed on the upper side and the lower side of the dielectric substrate; the metal radiation patches are defined by internal index tapered slot lines and external index tapered slot lines, and a radiation open slot is formed between the two metal radiation patches on the front surface and the back surface. According to the conformal array antenna, the antenna is used as an antenna unit, the six antenna units are uniformly arranged on the side surface of a circular truncated cone carrier, a certain gap is kept between the adjacent antenna units, and the antenna units keep the original shape. According to the invention, the low-frequency working bandwidth, the radiation gain and the directivity of the antenna are improved.

An antenna for a camera, comprising a camera having a communication module provided therein, a first radiator provided in a predetermined position of a lens barrel of the camera and having a length and a width for receiving a signal from a first wireless communication system, a power feeding line configured to feed a power from the communication module of the camera to the first radiator, and a ground line configured to ground the first radiator.

The invention discloses a design method of a miniaturization label buckling antenna of a tire embedded radio frequency identification device (RFID). The design method comprises the following steps of determining geometric dimension of bending units and input impedance of a label chip; determining quantity of the bending units in the horizontal direction; determining quantity of the bending units in the vertical direction; adjusting width of a meander line to enable antenna gain to be maximum; and increasing feed ends and adjusting loop inductance to enable the antenna impedance to be in conjugate match with the chip impedance. The design method is simple, effective and convenient to design, has good impedance matching characters, and enables the miniaturization label buckling antenna to be maximum in radiation gain and low in cost. Simultaneously, the design method can be applied to RFID application fields of communication, industrial control, equipment manufacturing, intelligent agriculture, food safety and the like.

The invention discloses broadband high-gain Vivaldi antenna which a dielectric substrate, a metal patch, a quadrangular metal patch, an impedance match microstrip line and a sector-shaped metal branch. The metal patch and the quadrangular metal patch are fixed in the top side of the dielectric substrate, the impedance match microstrip line and the sector-shaped metal branch are fixed in the bottomside of the dielectric substrate, the metal patch is provided with gradual-change trough line symmetric by taking the horizontal central axis as the center and provided with a horn-shaped opening, the gradual-change trough line is of index type gradual change, the bottom end of the gradual-change trough line is provided with a circular resonant cavity, the outer sidewalls of the gradual-change trough line are provided with comb shaped grids at equal interval, the quadrangular metal patch is positioned in the opening of gradual-change trough line, one end of the L-shaped impedance match microstrip line is connected to the sector-shaped metal branch, and the impedance match microstrip line and the sector-shaped metal branch serve as a feed structure. The Vivaldi antenna of the frequency range of 2.3-8.0GH is characterized by simple structure, wide frequency band and high gain.

A multi-band dipole array antenna is constructed by coupling a coaxial feed line in an axial direction thereof with at least two PCB-antenna sets connected in series. By adjusting or setting the distance between the PCB antennas and the length of the coaxial feed line, a stable radiation transmitting-receiving performance with an omni-directional efficacy and a high radiation gain for at least two wavebands can be achieved.

The invention provides a radiation structure and an array antenna. The radiation structure comprises a radiation fin with a radiation slot in the middle. The radiation slot consists of a transverse slot and a longitudinal slot, which are communicated with each other and are cross-orthogonal. The length of the transverse slot and the length of the longitudinal slot are less than the length of the radiation fin in the extending direction of the corresponding radiation slot. By adding the radiation slot to the radiation fin, the radiation structure can produce two kinds of radiation synchronouslywhen working in an antenna system, so as to achieve an effect of polarization vector superposition enhancement. Thus, the same radiation efficiency and radiation gain of the multi-layer patch structure in the traditional antenna can be achieved by only one layer of radiation fin, fewer components are used, the structure is simple, the antenna profile can be reduced, and antenna miniaturization isfacilitated.

The invention discloses a broadband, high-gain and double-slot Vivaldi antenna, which comprises a dielectric plate, a double-slot tapered slot line, edge waves and a feed element, wherein one surface of the dielectric plate is provided with a metal layer as the upper surface; the double-slot tapered slot line is arranged at the upper surface of the dielectric plate and is in an exponential gradient trumpet-shaped opening; the edge waves are arranged on the upper surface of the dielectric plate; and the feed element is arranged on the lower surface of the dielectric plate and is used for feeding the tapered slot line. By the technical scheme disclosed by the invention, the radiation gain of the Vivaldi antenna within a complete working band can be improved.

The invention discloses a method and device for remotely controlling an unmanned aerial vehicle. The method includes the steps that the position of the unmanned aerial vehicle and the position of a remote controller of the unmanned aerial vehicle are determined; when the maximum radiation direction of a directional antenna of the remote controller of the unmanned aerial vehicle does not point to the position of the unmanned aerial vehicle according to the position of the unmanned aerial vehicle and the position of the remote controller of the unmanned aerial vehicle, the pointing angle of the directional antenna is adjusted so that the maximum radiation direction of the directional antenna can point to the position of the unmanned aerial vehicle. In the technical scheme, the design of the directional antenna can be adopted for the unmanned aerial vehicle, and therefore the radiation gain of the remote controller of the unmanned aerial vehicle is increased; the direction of the antenna can be automatically adjusted according to the position of the unmanned aerial vehicle without manual adjustment, and therefore the level of autonomous control over the unmanned aerial vehicle is increased to a certain degree.

The invention discloses a parasitic-patch-loaded high-gain microstrip antenna based on GaN processing technology. The rectangular patch antenna is printed at the upper surface center of a dielectric substrate. The antenna is fed through a feeding microstrip line in an insertion feeding manner. The feeding microstrip line is perpendicular to the radiation edge of the patch antenna. The other end of the feeding microstrip line is connected with a GSG structure; the GSG structure is located at the edge of the dielectric substrate. The parasitic metal strip is parallel with the non-radiation edge of the rectangular patch antenna and is divided symmetrically by the straight line where the feeding microstrip line is located. The other radiation edge outer side of the rectangular patch antenna is provided with a parasitic patch, one end of which is grounded through a grounding metal column. The bottom part of the dielectric substrate is provided with a metal floor plate. According to the invention, the gain of the antenna is increased while the compactness of the antenna structure is maintained. The processing of the antenna is easy; the cost of doing so is small; therefore, the antenna can be produced on a large scale.

The invention provides a conformal surface wave antenna based on a holographic metasurface. The conformal surface wave antenna comprises a monopole feed source and a holographic impedance surface, theholographic impedance surface comprises m*n periodically arranged impedance surface units, each impedance surface unit comprises a dielectric plate, a square metal patch printed at the center position of the upper surface of the dielectric plate and a metal floor arranged at the lower surface of the dielectric plate, the surface impedance of each impedance surface unit is distributed based on theinterference pattern of a holographic principle, the reference waves corresponding to the distribution of the interference patterns are cylindrical surface waves generated by the monopole feed source, and a target wave is a radiation plane wave in the endfire direction of the holographic impedance surface. Directed radiation is achieved in the endfire direction of the conformal surface wave antenna prior to generation of the cylindrical surface waves, which are subjected to impedance modulation of the holographic impedance surface, by employing the monopole feed source to form a flat plane wave, and when a conformal surface wave antenna meets a curved surface bulge, diffraction propagation of the surface wave can be achieved.

Rear glass is provided with a patch-like radiation conductor and a first ground conductor surrounding the patch-like radiation conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is fixed on the base plate; and a cover for covering the frame body. One surface of the circuit substrate defines a component-holding surface which is connected with a second end of a feeder cable connected with the radiation conductor and the first ground conductor. The other surface of the circuit substrate is provided with a second ground conductor to function as a radio-wave reflective surface. The radio-wave reflective surface faces the radiation conductor and the first ground conductor disposed on the rear glass such that the radio-wave reflective surface is separated from the radiation conductor and the first ground conductor by a predetermined distance.