22results about "Radial guide fed arrays" patented technology

A method and apparatus for electrical addressing for an antenna (e.g., a metamaterial radio-frequency (RF) antenna are described. In one embodiment antenna comprising: a plurality of radio-frequency (RF) radiating antenna elements located in a plurality of rings; and matrix drive circuitry coupled to the plurality of RF radiating antenna elements to drive the antenna elements, wherein the matrix drive circuitry to uniquely address each of the antenna elements using a matrix of a plurality of rows and a plurality of columns with a non-grid-based addressing structure.

A composite stack-up for an antenna is described. In one embodiment, the antenna is a flat panel metamaterial antenna. In one embodiment, an antenna assembly comprises an antenna element layer having an upper side and a lower side; a first set of one or more layers forming an upper stack bonded to the upper side of the antenna element layer and being are at least partially transparent to radio frequency (RF) radiation; and a second set of one or more layers forming a lower stack bonded to the lower side of the antenna element layer, where the antenna element layer, upper stack and lower stack are bonded together to form a composite stack.

Antennas with integrated varactor circuits are described. The antenna may comprise metasurface antennas. In some embodiments, an antenna comprises an array of antenna elements, wherein each antenna element comprises a iris and a varactor diode integrated on an integrated circuit (IC) chip coupled across a portion of the iris. The antenna can also comprise a plurality of transistors, each transistor coupled to a distinct one of the varactor diodes in the array of antenna elements to provide a tuning voltage to the one varactor diode.

Multiband guiding structures for antennas and methods for using the same are described. In one embodiment, an antenna comprises: an antenna aperture with radio-frequency (RF) radiating antenna elements; and a center-fed, multi-band wave guiding structure coupled to the antenna aperture to receive a feed wave in two different frequency bands and propagate the feed wave to the RF radiating antenna elements of the antenna aperture.

The present invention aims to provide a ni High, large Δn, V th Low, Δε r Large, tanδ iso Liquid crystal compositions that are small in size and have good storage properties at low temperatures, liquid crystal compositions, and liquid crystal display devices, sensors, liquid crystal lenses, optical communication devices, and antennas using the same. Specifically, the invention relates to a compound represented by the general formula (i) having an ethynylene group (-C≡C-) and an isothiocyanate group (-NCS), and a liquid crystal composition containing one or more such compounds.

It is an object of the present invention to provide a compound that can provide a liquid crystal composition with a high Tni, a high Δn, a low Vth, a high Δεr, a low tan δiso, and high storage stability at low temperatures, a liquid crystal composition, as well as a liquid crystal display element, a sensor, a liquid crystal lens, optical communication equipment, and an antenna each using this. Specifically disclosed are a compound represented by the general formula (i) having an ethynylene group (—C≡C—) and an isothiocyanate group (—NCS) and a liquid crystal composition containing one or two or more of the compounds.

A multibeam antenna and method of using the same are described. In one embodiment, the antenna comprises an aperture having a plurality of radio-frequency (RF) radiating antenna elements. The RF radiating antenna elements generate a plurality of beams simultaneously in different directions in response to a first modulation pattern for holographic beamforming applied to the plurality of RF radiating antenna elements to establish all beams of the plurality of beams such that antenna elements of the plurality of RF radiating antenna elements contribute to all beams in the plurality of beams concurrently. The antenna also includes a controller coupled to the aperture to generate the first modulation pattern.

In some examples, a method for fabricating a switching structure of a radial slot line antenna (RLSA) array using a single semiconductor wafer element comprises forming a set of active switching devices in the wafer element, a position of each active switching device on the wafer element selected according to a predefined configuration representing a slot element layout of the RLSA array, and forming a drive circuit in the wafer element, the drive circuit individually addressing each of the set of active switching devices thereby enabling a selected bias signal to be applied to the set of active switching devices.

An antenna and method for using the same having a hybrid feed approach. In some embodiments, the metasurface antenna with dual beam capabilities is feed with feed waves from a center-fed waveguide structure and an edge-fed waveguide structure. In some embodiments, the antenna comprises an array of radio-frequency (RF) radiating antenna elements and operable to generate two beams simultaneously in response to interacting with two propagating waves at a same time; and a feed structure coupled to feed the two waves to the array of RF radiating antenna elements, the feed structure having a first waveguide beneath the RF radiating antenna elements in which the two waves propagate in opposite directions.

Multiband guiding structures for antennas and methods for using the same are described. In one embodiment, an antenna comprises: an antenna aperture with radio-frequency (RF) radiating antenna elements; and a center-fed, multi-band wave guiding structure coupled to the antenna aperture to receive a feed wave in two different frequency bands and propagate the feed wave to the RF radiating antenna elements of the antenna aperture.

This disclosure provides a holographic drain antenna and electronic equipment, and belongs to the field of communications technology. The holographic drain antenna of this disclosure includes a first waveguide structure, a first dielectric substrate, a radiating layer, a first reference electrode layer, and a plurality of switching units, wherein the first dielectric substrate is provided on the first waveguide structure and has a first gap with respect to the first waveguide structure, the first reference electrode layer is provided on the side of the first waveguide structure away from the first dielectric substrate, and the radiating layer is provided on the side of the first dielectric substrate away from the first waveguide structure and has a plurality of slit openings on the radiating layer, wherein the first waveguide structure has at least one feeding port, and the feeding port does not overlap with the orthographic projection of the first reference electrode layer on the first dielectric substrate, the switching units are provided in one-to-one correspondence with the slit openings, and the switching units are arranged to independently control the switched state of the corresponding slit openings.

A radar system for a vehicle includes: at least one main transmit antenna configured to transmit main radar waves essentially parallel to a road on which the vehicle is standing or driving; at least one main receive antenna configured to receive reflections of the main radar waves off objects on the road; a first street condition monitoring, SCM, transmit antenna configured to transmit first polarized radar waves essentially directed to the road at a first polarization; a second SCM transmit antenna configured to transmit second polarized radar waves essentially directed to the road at a second polarization different from the first polarization; a first SCM receive antenna configured to receive, at the first polarization, reflections of the polarized radar waves off the road; and a second SCM receive antenna configured to receive, at the second polarization, reflections of the polarized radar waves off the road.

The present disclosure provides a holographic leaky-wave antenna and an electronic device, and belongs to the technical field of communication. The holographic leaky-wave antenna comprises a first waveguide structure, a first dielectric substrate, a radiation layer, a first reference electrode layer and a plurality of switch units. The first dielectric substrate is arranged on the first waveguide structure and has a first gap with the first waveguide structure. The first reference electrode layer is arranged on the side of the first waveguide structure away from the first dielectric substrate. The radiation layer is arranged on the side of the first dielectric substrate away from the first waveguide structure, and the radiation layer has a plurality of slit openings. The first waveguide is configured with at least one feeding port, and the feeding port has no overlap with the orthographic projection of the first reference electrode layer on the first dielectric substrate. The switch units are arranged one by one corresponding to the slit openings, and the switch units are configured to independently control the on-off state of the corresponding slit openings.

An embodiment of an antenna includes first and second transmission lines, first antenna elements, and second antenna elements. The first transmission line is configured to guide a first signal such that the first signal has a characteristic of a first value, and the second transmission line is configured to guide a second signal such that the second signal has the same characteristic but of a second value that is different than the first value. The first antenna elements are each disposed adjacent to the first transmission line and are each configured to radiate the first signal in response to a respective first control signal, and the second antenna elements are each disposed adjacent to the second transmission line and are each configured to radiate the second signal in response to a respective second control signal. Such an antenna can have better main beam and side lobe characteristics, and a better SIR, than prior antennas.

A single-layer wide-angle impedance matching (WAIM) structure and methods of using the same are described. In one embodiment, an antenna comprises an aperture having a plurality of antenna elements operable to radiate radio frequency (RF) energy, and a single-layer wide-angle impedance matching (WAIM) structure coupled to the aperture to provide an impedance match between the aperture and free space.

In some examples, a method for generating a set of slot activation configurations for a holographic radial line slot antenna array comprising multiple slots defining a preconfigured slot pattern, each slot activation configuration defining a beam pattern for a signal to be emitted by the antenna, comprises generating a measure for the mutual coupling between the multiple slots in the presence of a signal to be applied to the antenna, the measure comprising a set of scattering parameters defining a scattering matrix for the antenna, using the measure for the mutual coupling, generating a set of impedance parameters for the array, controlling the resonance of at least one of the multiple slots by regulating a value of capacitance of a variable capacitance device provided across the slot, measuring a value for antenna gain of a beam pattern associated with the value of capacitance, selecting a final value of capacitance resulting in the highest measure of gain for the beam pattern, and selecting a slot activation configuration for the beam pattern on the basis of the selected final value of capacitance.

To provide an antenna device and a radio apparatus capable of improving characteristics.SOLUTION: An antenna device 110 includes a waveguide 10. The waveguide 10 includes a feeding point 10c and a first region 10r around the feeding point 10c. The waveguide 10 can guide a high frequency signal supplied to the feeding point 10r. The waveguide 10 includes a plurality of radiant sections 20 provided in the first region 10r. The first region 10r includes a first subregion 11 and a second subregion 12. The feeding point 10c is located between the first subregion 11 and the second subregion 12. A first waveguide length in the waveguide 10 in the first subregion 11 is shorter than a second waveguide length in the waveguide 10 in the second subregion 12.SELECTED DRAWING: Figure 1

The present disclosure provides a holographic leaky-wave antenna and an electronic apparatus, and relates to the field of communication technology. The holographic leaky-wave antenna includes a first waveguide structure, a first dielectric substrate, a radiation layer, a first reference electrode layer, and switching units. The first dielectric substrate is arranged on the first waveguide structure and there is a first gap between the first dielectric substrate and the first waveguide structure; the first reference electrode layer is arranged on a side of the first waveguide structure away from the first dielectric substrate; the radiation layer is arranged on a side of the first dielectric substrate away from the first waveguide structure, and has slit openings therein. The first waveguide structure includes at least one feeding port.

Multiband guiding structures for antennas and methods for using the same are described. In one embodiment, an antenna comprises: an antenna aperture with radio-frequency (RF) radiating antenna elements; and a center-fed, multi-band wave guiding structure coupled to the antenna aperture to receive a feed wave in two different frequency bands and propagate the feed wave to the RF radiating antenna elements of the antenna aperture.

A metasurface unit includes a metal radiation patch with a gap, an upper-layer dielectric plate, a metal ground layer, a lower-layer dielectric plate, and a feed structure arranged in sequence from top to bottom. One end of the feed structure is connected to the metal radiation patch, and another end of the feed structure is arranged on a bottom layer of the lower-layer dielectric plate through a feed through hole. The feed through hole passes through the upper-layer dielectric plate, the metal ground layer and the lower-layer dielectric plate in turn. The metal radiation patch is rotatable around a central axis. Different included angles between the gap and a positive direction of an X-axis correspond to different polarization states.

The invention provides a compound, a liquid crystal composition, and a liquid crystal display element, a sensor, a liquid crystal lens, an optical communication device, and an antenna using the same. A liquid crystal composition containing one or more compounds represented by general formula (i).

Antennas such as flat panel, leaky wave antennas with directional coupler feeds and waveguides are disclosed. In one example, an antenna includes a surface having antenna elements, a guided wave transmission line, and a coupling surface. The guided wave transmission line provides a guided feed wave. The coupling surface is between and separates the guided wave transmission line and the surface having antenna elements. The coupling surface controls coupling of the guided feed wave to the antenna elements. The coupling surface can also spatially filter the guided feed wave to provide a more uniform power density for the antenna elements. The guided feed wave can be a high power density electromagnetic wave or a density radially decaying electromagnetic wave.