Confocal phased array fed reflector antenna beam stabilization

    公开(公告)号:US11901630B1

    公开(公告)日:2024-02-13

    申请号:US17176563

    申请日:2021-02-16

    发明人: Alan Cherrette

    摘要: Provided herein are various improvements to antenna stabilization systems, such as employed on confocal phased array reflector antenna arrangements. In one example, a system includes a feed structure for a main reflector, the feed structure comprising an electronically scanned array (ESA) feed and a sub-reflector. The sub-reflector is configured to propagate a signal between the ESA feed and the main reflector. The system also includes a star tracker element coupled to the feed structure and configured to determine orientation information relative to star alignment, and laser distancing elements coupled to the feed structure and configured to determine distance measurements relative to the main reflector. A control system is configured to determine pointing errors of the main reflector based at least on the orientation information and the distance measurements, and these pointing errors can be used by the ESA feed to adjust steering of a signal towards a target.

    BASE STATION ANTENNA WITH MUTUAL DOWNTILT IN MULTIPLE FREQUENCY BANDS

    公开(公告)号:US20230170605A1

    公开(公告)日:2023-06-01

    申请号:US18050529

    申请日:2022-10-28

    摘要: A base station antenna includes: a plurality of reflector panels; a plurality of printed circuit boards (PCBs), each of the circuit boards mounted on a respective one of the reflector panels; a plurality of radiating elements mounted on each of the PCBs, wherein the PCBs and the radiating elements are configured and arranged so that the base station antenna receives and transmits radio frequency signals in a first frequency band and a second frequency band; first and second wiper members pivotally mounted on each PCB at respective first and second pivots, the first and second wiper members being configured such that pivotal movement of the first and second wiper members induce downtilt angle adjustment in the radiating elements that transmit and receive signals in first frequency band; third and fourth wiper members pivotally mounted on each PCB at respective third and fourth pivots, the third and fourth wiper members being configured such that pivotal movement of the third and fourth wiper members induce downtilt angle adjustment in the radiating elements that transmit and receive signals in a second frequency band; and a phase shifter linkage comprising a first carrier member and a second carrier member fixed relative to the first carrier member, the first carrier member engaging the first and second wiper members and the second carrier member engaging the third and fourth wiper members. Actuation of the phase shifter linkage causes the first carrier member and the second carrier member to move in concert relative to the PCBs, so that downtilt angle adjustment of the first frequency band equals downtilt adjustment of the second frequency band.

    Feed for an antenna system comprising a sub-reflector and a main reflector

    公开(公告)号:US11621494B2

    公开(公告)日:2023-04-04

    申请号:US17479241

    申请日:2021-09-20

    发明人: Armel Lebayon

    摘要: A horn feed including: a central conduit extending axially in a first direction from a first portion that is configured to be relatively distal from a sub-reflector and including a first aperture and a second portion that is configured to be relatively proximal to the sub-reflector and including a second aperture; and an interface configured to connect to a dielectric support including an outer cylindrical dielectric wall of a substantially cylindrical shape and an inner cylindrical dielectric wall of a substantially cylindrical shape, wherein the central conduit, the outer cylindrical dielectric wall and the inner cylindrical dielectric wall are co-axial.

    User terminals with enhanced performance at low elevation angles for LEO and GEO satellites

    公开(公告)号:US11355842B2

    公开(公告)日:2022-06-07

    申请号:US17542359

    申请日:2021-12-03

    摘要: Disclosed embodiments relate to communicating with satellites at any elevation. In one example, an antenna system includes two or more user terminal panels (UTPs). Each of the UTPs include multiple user terminal modules (UTMs). The UTPs may be arranged in either a fixed, an adjustable geometry or a combination thereof. A UTM has multiple user terminal elements (UTEs) that include antennas and active circuits. An antenna may either generate an incoming signal in response to incident radio waves received from a satellite and/or may transmit an outgoing signal toward the satellite. Each active circuit is configured to process the incoming and outgoing signals. Also, the antenna system may include a control circuit configured to control signal processing performed by the active circuits. The UTPs may be operably connected to a single satellite, or different UTPs may be operably connected to different satellites.

    Object sensor including pitch compensation

    公开(公告)号:US11264706B2

    公开(公告)日:2022-03-01

    申请号:US16151859

    申请日:2018-10-04

    摘要: An illustrative example detector for use on a vehicle includes a radiation emitter having a near field region that is defined at least in part by a wavelength of radiation emitted by the radiation emitter. A radiation steering device includes a plurality of reflectors, an actuator, and a controller. The reflectors are situated to reflect the radiation emitted by the radiation emitter. The reflectors are in the near field region and have at least one characteristic that limits any phase shift of the reflected radiation. The actuator is configured to adjust an orientation of the reflectors. The controller is configured to determine an orientation of the plurality of reflectors relative to the radiation emitter to steer the emitted radiation reflected from the reflectors in a determined direction. The controller is configured to control the actuator to achieve the determined orientation.

    Supplemental device for an antenna system

    公开(公告)号:US10923810B2

    公开(公告)日:2021-02-16

    申请号:US16127223

    申请日:2018-09-10

    申请人: Deere & Company

    发明人: Mark L. Rentz

    摘要: In accordance with one embodiment, a supplemental device for an antenna system comprises a ring that provides a generally horizontal annular ground plane, where the ring has an interior circumference. A substantially annular wall rises or extends from the ring at or near the interior circumference. A set of radial members extends radially upward from the ring, the radial members spaced apart from each other.

    Antenna device and antenna system
    10.
    发明授权

    公开(公告)号:US10833420B2

    公开(公告)日:2020-11-10

    申请号:US16874054

    申请日:2020-05-14

    发明人: Kuang-Kai Cheng

    摘要: An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.