8results 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.

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.

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

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.

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.