37results about How to "Achieving Directed Radiation" patented technology

The invention discloses a quasi-surface plasmon-based leaky-wave antenna, and belongs to the technical field of microwaves. The leaky-wave antenna comprises a feed network and a radiating element, wherein the feed network comprises a gradient matching structure; the gradient matching structure is used for achieving conversion of an electromagnetic wave between a TEM mode or a quasi-TEM mode and a quasi-surface plasmon mode; and the radiating element is a quasi-surface plasmon waveguide capable of enabling the phase velocity of the transmitted quasi-surface plasmon to discontinuously change. Compared with the prior art, the radiating element of the leaky-wave antenna is achieved on the basis of the quasi-surface plasmon waveguide for a phase velocity modulation; the quasi-surface plasmon-based leaky-wave antenna is simple in structure, relatively small in interference to an external circuit and relatively easy to process, and does not need metal ground; and omnidirectional radiation and frequency scanning functions are relatively easy to achieve.

The invention provides an ultra-wideband high-gain antenna based on a radial disk impedance converter. According to the ultra-wideband high-gain antenna, the radial disk technology is introduced into the ultra-wideband antenna design for the first time, the design of the radial disk impedance converter is added to a feeding position of the antenna, the ultra-wideband operation problem of different transmission line converters in a feeding system can be solved, and the effect that an antenna radiator can achieve effective conversion and directed radiation of electromagnetic energy under the condition of wideband feeding can be guaranteed. Meanwhile, a ridge waveguide structure with electric field and magnetic field centralizing effects is adopted, and two side surfaces of a ridge waveguide cavity used for energy exchange adopt a triangular ridge structure with an ultra-wideband property, thereby guaranteeing the effect that electromagnetic waves of different frequencies have well matched electromagnetic energy conversion cavities. The ultra-wideband high-gain antenna based on the radial disk impedance converter adopts the large-diameter gradually changing and ridge directional horn radiator design technologies, can achieve high gain and directed radiation of the antenna within ultra-wideband, and can control polarization characteristic and directional diagram sidelobes of the antenna.

The invention discloses a microstrip slot antenna with reconfigurable directional diagrams. The microstrip slot antenna comprises a three-layer structure including a dielectric substrate, a feed network and an earth plate, wherein a top layer of the dielectric substrate is the feed network, and a bottom layer of the dielectric substrate is the earth plate; the earth plate comprises four radiationslot units which are in rotary symmetry and are mutually separated and four rectangular slots formed in the tail ends of the radiation slot units; the feed network comprises a square microstrip patch,a switch, four L-shaped microstrip coupling branches and low-pass filters; the four L-shaped microstrip coupling branches are connected to four sides of the square microstrip patch through switches;one low-pass filter is arranged at the tail end of each L-shaped microstrip coupling branch and is a switch bias circuit; the low-pass filters are used for controlling conduction and disconnection ofthe switches and changing a work mode of an antenna. The microstrip slot antenna disclosed by the invention meets the requirements of small size, compact structure and wider bandwidth and can realizethe reconfigurability of four directional diagrams on the horizontal plane at the same time.

The invention discloses a mobile terminal millimeter wave phased array magnetic dipole antenna and a mobile terminal millimeter wave phased array magnetic dipole antenna array. The mobile terminal millimeter wave phased array magnetic dipole antenna comprises a phase-shift feed network for realizing the feed phase difference between different units and a semi-open substrate integrated waveguide resonant cavity used for realizing magnetic dipole radiation; and the semi-open substrate integrated waveguide resonant cavity adopts feed probes, and the tail end of a probe-type feed structure is connected to the phase-shift feed network. The phase-shift feed network and the semi-open substrate integrated waveguide resonant cavity are integrated onto two layers of laminated dielectric plate correspondingly, the final antenna structure is formed by the two layers of dielectric plate in a laminated mode, the lower layer is a phase-shift network layer, and the upper layer is a radiation structurelayer. The antenna array is applied to terminal millimeter wave communication so that a compact solution for solving the problem of signal coverage on the upper hemisphere surface of terminal equipment can be realized.

The invention discloses an ultra-wideband low-profile conformal antenna comprising a plurality of radiating elements and a plurality of virtual units. The radiating units and the virtual units are coupled, adjacent units are tightly connected together, the radiating units are connected to the virtual units through power resistors, both the radiating units and the virtual units are printed on a dielectric substrate, and multiple ports are synthesized by a power splitter in an equal phase and same phase way. An outer side of the conformal antenna is provided with a layer of skin, an inner side is provided with a supporting structure, the supporting structure is provided with a mounting hole, and the conformal antenna is mechanically connected through the mounting hole. The relative bandwidthof the invention can reach 8 times of octave or even wider, the antenna height is only equivalent to 0.22 lambda of a center frequency point and is equivalent to 0.06 lambda of a low frequency, and the directional radiation can be achieved by using a metal plate in a machine body. The antenna directional diagram is stable in an ultra-wideband of 8 octaves, and no distortion such as inclined headand falling pits occurs.

The invention provides a small-aperture, high-gain and broadband dielectric rod antenna, which belongs to the field of radio technology. The antenna includes a feeding structure, a transmission waveguide, and a dielectric rod lens. The connection end of the feeding structure is connected with one end of the transmission waveguide, and one end of the dielectric rod lens is inserted into the other end of the transmission waveguide. The connection end of the feeding structure is of a stepped block structure. The dielectric rod lens includes a matching section, a transition section, a transmissionsection, and a radiation section. The matching section, the transition section, the transmission section and the radiation section are connected in sequence as a whole. The matching section is inserted into the other end of the transmission waveguide. By introducing the stepped block structure, the impedance bandwidth is improved. By optimizing the dielectric rod structure, broadband high-gain directional radiation is realized.

The invention relates to the technical field of antenna design, in particular to a wideband planar antenna. The wideband planar antenna comprises a dielectric base plate, a metal grounding plate, a micro-strip feeder, a coaxial connector and N radiating units, wherein the N is greater than or equal to 5; the N radiating units and the micro-strip feeder are printed on the upper surface of the dielectric base plate, the first radiating unit to the Nth radiating unit are sequentially arranged at both sides of the micro-strip feeder in a mutually-staggered way according to a log-periodic mode, the sizes of the N radiating units are increased according to certain scaling factors, and a first gap is arranged between each radiating unit and the micro-strip feeder; the metal grounding plate is printed on the lower surface of the dielectric base plate; an outer conductor of the coaxial connector is connected with the metal grounding plate, and an inner conductor of the coaxial connector is connected with the micro-strip feeder. The wideband planar antenna provided by the invention has a simple and effective structure, and a wideband antenna with the relative bandwidth of more than 66.7 percent is realized.

The invention discloses a millimeter-wave dual-polarized antenna for a mobile terminal. The millimeter-wave dual-polarized antenna consists of a magnetic dipole antenna unit based on a semi-open substrate integrated waveguide resonator and an electric dipole antenna unit taking substrate integrated waveguide as a feeding balun. According to the millimeter-wave dual-polarized antenna, three antennas are respectively mounted on the left side, the right side and the upper side of equipment, so that a three-dimensional space signal cover demand of terminal equipment exceeding a hemisphere can be met; and the characteristic of dual polarization can be provided.

The invention discloses a dual-band dual-mode wireless body area network antenna, i.e., a planar microstrip antenna with dual purposes of on-body communication and out-of-body communication. Omnidirectional radiation and directional radiation are independently realized by working under a monopole mode and a cavity resonant mode. The structure of the antenna comprises an upper layer dielectric slaband a lower layer dielectric slab, wherein the upper surface of the upper layer dielectric slab is coated with metal to serve as the main radiator of the antenna, and the lower surface is not coatedwith the metal; the upper surface of the lower layer dielectric slab is coated with a metal layer to serve as the metal ground of the antenna, and the metal ground is provided with a round hole for afeeding metal column to pass; the lower surface of the lower layer dielectric slab is also coated with one section of rectangular metal structure; and two layers of dielectric slabs are connected through three metal columns, wherein the middle metal column is the feeding metal column for connecting the radiator with the tail end of the microstrip antenna, and the other two metal columns are independently connected with the radiator and the metal ground. By use of the antenna, the problem that an existing antenna feeding system with dual purposes of on-body communication and out-of-body communication is complex can be solved.

The invention discloses a differentially fed dual-polarized antenna with wideband harmonic suppression. The antenna includes an antenna reflection plate at the bottom and an antenna radiator dielectric plate at the top. The antenna radiator dielectric plate is composed of a top circuit and a bottom circuit. The bottom circuit includes a central square patch and eight open resonant slots that are etched at the four right-angle corners of the central square patch. The top circuit includes eight stepped feeder lines that are configured to excite the eight open resonant slots respectively. A short-circuited branch microstrip line is etched between every two adjacent stepped feeder lines. The tail end of each short-circuited branch microstrip line is provided with a short-circuit point that isshort-circuited with the square patch. In the antenna disclosed in the present invention, the eight open resonant slots are etched at the four right-angle corners of the central square patch to achieve a symmetrical radiation pattern and low cross polarization.

The invention discloses a portable far-infrared radiation heating drying device, comprising an upper chassis, a lower chassis, a metal straight, a metal tube, an inner reflective plate, and a frame. The inner face of frame is arranged with the reflective plate arranged with ceramic-base radiator, to directional radiate the putty and paint uniformly, without thermal stressed point, while it can dry the inner and outer faces together, without foaming the paint. The heating power is twice times than the sun lamp, but saves more than 50% energy, with high efficiency, while its service life can reach 80thousand hours.

The invention discloses a bipolar microstrip oscillator with isolating rods. An oscillator circuit structure comprises four oscillator sheets. Each oscillator sheet is provided with a plurality of hollow isolating slots parallelly, and each isolating slot is provided with a plurality of loading holes in two sides. Through such a reasonable structural design, distributed load technology is used on a radiation unit. Through comprehensive optimization of a series of technologies, an antenna is further miniaturized, thereby satisfying the requirements of a communication system in the prior art. With the above structure, the oscillator realizes antenna radiation directional diagram control characterized by directional radiation with a high gain. Thus the oscillator is characterized by high symmetry, high integrated level, miniaturization, good radiation features, high gain, low costs and easy integration.

The invention discloses a unipolar high-gain microstrip oscillator. The oscillator comprises two oscillator sheets arranged centrosymmetrically. Each oscillator sheet is provided with a plurality of hollow isolating slots parallelly, and each isolating slot is provided with a plurality of loading holes in two sides. Through such a reasonable structural design, distributed load technology is used on a radiation unit. Through comprehensive optimization of a series of technologies, an antenna is further miniaturized, thereby satisfying the requirements of a communication system in the prior art. With the above structure, the oscillator realizes antenna radiation directional diagram control characterized by directional radiation with a high gain. Thus the oscillator is characterized by high symmetry, high integrated level, miniaturization, good radiation features, high gain, low costs and easy integration.

The invention provides an infrared generator. The infrared generator is capable of greatly improving the radiation coefficient of a middle infrared ray and improving the directionality of the radiation. The infrared generator is characterized by comprising a quartz container provide with an internal cavity, two external electrodes correspondingly and separately disposed on the two end faces of thewalls of the quartz container, an infrared radiation member and two internal electrodes separately corresponding to the two external electrodes, wherein the infrared radiation member comprises a radiation body, and at least one surface of the radiation body is provided with a plurality of radiating surfaces of pits formed by the surface depression and uniformly distributed; and the pits are provided with pit bottoms disposed at the bottom ends, pit walls surrounding the pit bottoms and formed by extending outwardly along the pit bottoms and pit openings arranged at the top ends of the pit walls, each pit meets: D/R1 is greater than or equal to 1, wherein D is the depth of the pits, R1 is the radius of the pit openings of the pits, and the radius of the pit openings is the radius of circles which can just cover the pit openings.

The invention provides a broadband directional millimeter-wave antenna, which comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a coplanar feed transmission line, a first ground plane, a second ground plane, a parasitic element, a first C-shaped reflecting surface, a second C-shaped reflecting surface, a bottom reflecting plate and a rabbit-shapedmain radiating element, wherein the first C-shaped reflecting surface and the second C-shaped reflecting surface arranged on the dielectric substrates on two left and right folded side surfaces and the bottom reflecting plate of the antenna form a closed cavity structure; the coplanar feed transmission line is connected with an inner conductor of a connector; and an outer conductor of the connector is connected with the ground planes. According to the broadband directional millimeter-wave antenna provided by the invention, the broadband and directional millimeter-wave antenna design is achieved by adopting a coplanar line feed structure, a structural design of a closed cavity formed between the folded dielectric substrates and the bottom reflecting plate and the design of a gap coupling structure between the rabbit-shaped main radiating element and the parasitic radiating element.