48results about How to "Narrow beam width" patented technology

A dual-band feed horn having a connection surface configured for connection to a waveguide and a first surface coupled to the connection surface. The first surface has a cylindrical surface with a length and a first diameter chosen to propagate TE11 modes for both a low frequency band and a high frequency band. The horn has a bandwidth ratio of the high-frequency band to the low frequency band in the range of 1.6-4.0. The horn also has a substantially conical surface coupled to the first surface at a first slope discontinuity. The conical surface includes multiple surfaces each having a respective slope and coupled to adjacent surfaces by a respective plurality of slope discontinuities each having a respective diameter. The slopes and diameters are chosen to generate primarily TM1,m modes (m=1, 2, 3, etc.) in the high-frequency band and primarily higher order TE1,n modes (n=2, 3, etc.) in the low-frequency band such that the low frequency band and the high frequency band have approximately equal beam widths.

A pentagonal antenna array having a high aperture efficiency and a suitably high overall gain and low antenna noise temperature. The high aperture efficiency of this antenna system provides an overall system capacity suitable for broadband communication services. The antenna array consists of five antenna elements each located at a separate vertex of a pentagon. The antenna elements are helical antennas to provide a narrow antenna beam width. The antenna array itself is supported on a base platter which may be steered to point at a satellite using conventional gimbal ring apparatus. The base platter is a planar reflector to reflect the antenna element radiation in the rear direction and thereby reduce the antenna backlobe levels. The input power and the signal transmitted are fed through a phasing / combining network. The phasing / combining network appropriately divides the signal and the input power and phases the signal, prior to feeding the signal to each of the five antenna elements.

A dual-band antenna system configured to transmit and / or receive microwave beams over two or more frequency bands with substantially similar beam widths and substantially similar sidelobe levels is disclosed. The antenna system includes at least one reflector and at least one feed horn, the horn configured to provide a first efficiency over a first frequency band and lower efficiencies over one or more second frequency bands. The horn includes a substantially conical wall having an internal surface with a variable slope. The internal surface includes one or more slope discontinuities, wherein the slope discontinuities are configured to generate primarily TE1,m modes within the first frequency band and within the second frequency bands and generate TM1,n modes substantially only within the second frequency bands.

The invention discloses a circularly polarized microstrip antenna, and mainly solves the problems that an existing satellite high speed communication antenna is narrow in frequency band, low in gain, and large in size. The circularly polarized microstrip antenna comprises a radiating unit (1), a dielectric lens (2), a support pillar (3), a parasitic patch layer (4), a patch layer (5), a floor layer (6) and a feed network layer (7). The radiating unit (1) is formed by the parasitic patch layer (4) and the patch layer (5), the floor layer (6) and the feed network layer (7) are adhered on the lower portion of the patch layer (5) in sequence, an orthometric double-fed feed unit is arranged at the back face of the feed network layer (7), and the feed unit extends to the right edge of the feed network layer (7)through feeder lines, and is welded with a sub-miniature-A (SMA) coaxial interface to carry out feed. The dielectric lens (2) is fixed above the parasitic patch layer (4) through the support pillar (3). The circularly polarized microstrip antenna has the advantages of being high in gain, wide in frequency band, small in structure, and capable of being used in various mobile communication base stations.

The invention relates to a planar multi-pole sub-vector receiving array system which can work within a low-frequency range of 20-1000 Hz and has high array gain and a small-size narrow beam. The planar multi-pole sub-vector receiving array system comprises nine vector array elements, a cylindrical voltage-resistant array body, an upper covering plate, a lower covering plate, twenty-seven signal amplification filtering circuit unit, a signal collecting unit, a power supply battery unit and a connecting wire, wherein the nine vector array elements are arranged into a 3*3 planar array on the upper covering plate of the cylindrical array body, an O-shaped ring is used for achieving watertightness between the array elements and the upper covering plate of the array body and is fixed through a bolt, the twenty-seven signal amplification filtering circuit unit, the signal collecting unit, the power supply battery unit and the connecting wire are arranged inside the cylindrical array body, and the whole system has no cable output. The planar multi-pole sub-vector receiving array system is small in size, light in weight and convenient to use, can obtain good array processing gain and an ideal wave beam width at a low-frequency stage, and can largely improve the technical level of a hydroacoustic detection system.

The present invention relates to an apparatus for focusing particle beams using a radiation pressure capable of obtaining the same flow amount and a narrower particle beam width with respect to the particle size and a higher numeral density. It is possible to form the particle beams by applying the radiation pressure to the particles with respect to the flow condition that cannot form the particle beams with respect to the set particle sizes. There is provided an apparatus for focusing particle beams using a radiation pressure, comprising an orifice part that is provided at a predetermined portion of the flow tube, and a lens having a hole with a predetermined diameter for thereby focusing the particle flow into a particle beam and applying a radiation pressure to the flow particles; and a light source supply part (A) provided at a portion opposite to the discharge outlet of the mixing tube.

The invention relates to the technical field of antennas, in particular to a dual-band 5G micro-strip antenna. The dual-band 5G micro-strip antenna includes a dielectric substrate, the dielectric substrate includes a first surface and a second surface, metal foil is laid on the first surface of the dielectric substrate, and the first surface of the dielectric substrate serves as a grounding plane of the antenna; the first surface and the second surface of the dielectric substrate are both provided with metal patches and further include feeder ports, the feeder ports feed the metal patches through coaxial lines or micro-strip lines, the inner diameter of each coaxial line is connected to the first surface, the outer diameter of each coaxial line is connected to the second surface, the metal patches are dendritic, and each metal patch includes a plurality of polygonal radiating bodies; the antenna is small in thickness and simple in structure and can solve the communication problem of small equipment, the work efficiency is effectively improved, and compared with a traditional antenna, the antenna area is reduced.

The invention discloses a high-frequency-band dielectric material characteristic measurement method, and belongs to the technical field of microwave antenna material characteristic measurement. The method includes building a lens antenna model in three-dimensional full-wave electromagnetic simulation software, performing primary simulation on the lens antenna model, obtaining a group of far-field radiation pattern test parameters, and wherein a lens of the lens antenna model is made of a to-be-tested high-frequency-band dielectric material; manufacturing a lens antenna according to the lens antenna model, and performing actual far-field radiation pattern test to obtain actual far-field radiation pattern test parameters; performing post-simulation, only changing the dielectric constant and the loss angle tangent in the lens antenna model, and performing simulation to obtain N groups of far-field radiation pattern test parameters of the lens antenna model; and comparing the post-simulation result with actual far-field radiation pattern test parameters to obtain dielectric constants and loss tangent values corresponding to a group of simulation values closest to the actual measurement result. According to the invention, the dielectric material characteristics of the high-frequency-band dielectric material sample to be measured can be conveniently and accurately obtained, and the cost is low.

A fractional beam forming network antenna includes a beam forming network and a plurality of antennas. The network includes input ports, output ports, and at least one delay device. The beam forming network couples input ports to the output ports through the at least one delay device. The antennas are vertically disposed relative to each other, and coupled to the output ports. At least two of the antennas include a different elevation tilt and / or azimuth rotation relative to each other. A method of fractional beam forming is provided, which includes coupling, using a beam forming network, input ports to output ports through at least one delay device; disposing a plurality of antennas vertically relative to each other; coupling the antennas to the output ports; and rotating at least two of the antennas in different elevation and / or different azimuth relative to each other.

The invention discloses a dipole antenna array with a bunching effect as a theoretical model, provides two ultra-low profile omnidirectional antenna systems with bunching effects based on the theoretical model, and belongs to the technical field of antennas. Compared with a single dipole (namely an uncompressed beam), the dipole antenna array disclosed by the invention has the advantages that narrower beam width and higher gain are obtained, the bunching target is realized, and theoretical guidance is provided for the design of an actual antenna system. According to the two ultra-low profile omnidirectional antenna systems with the bunching effect, the remarkable bunching effect and gain improvement effect are achieved while the ultra-low profile is kept, and the two ultra-low profile omnidirectional antenna systems can be well applied to a limited space and a specific scene; and the design has great frequency flexibility, and an antenna system working at other frequencies (such as 2G, 4G and the like) can be easily designed, so that corresponding theories and engineering technologies in the antenna field are further enriched and developed.

The invention discloses a dual-polarized broadband antenna array with high isolation suspension microstrip line balanced feed. The antenna array mainly consists of an antenna body and a feed network for feeding the antenna body. The antenna body is composed of The antenna unit is arranged, and the antenna unit includes an upper dielectric board, a middle dielectric board, a lower dielectric board, a first polarized coaxial probe and a second polarized coaxial probe, and the upper surface of the upper dielectric board is printed A radiation patch is prepared and connected to the first polarized coaxial probe and the second polarized coaxial probe, and a ground reflection plate is printed on the lower surface of the lower dielectric board. Compared with the prior art, the invention has high isolation, high gain and wide impedance bandwidth.