-
公开(公告)号：US10699435B2
公开(公告)日：2020-06-30
申请号：US15769449
申请日：2016-08-31
发明人： Dmitry Vitalievich Tatarnikov , Leonid Valerianovich Edelman , Aleksandr Aleksandrovich Pimenov , Michail Nikolaevich Smirnov , Nikolay Aleksandrovich Penkrat
摘要： A vehicular positioning system utilizing multiple optical cameras having contiguous fields of view for reading coded markers having pre-determined positions for determining the position of vehicle inside a structure with a high degree of accuracy. The vehicle positioning system provides for the direct installation and use of a positioning apparatus on a vehicle with a limited number of coded markers to determine the vehicle's position to within millimeter level accuracy.
-
公开(公告)号：US11327183B2
公开(公告)日：2022-05-10
申请号：US16091152
申请日：2018-05-18
摘要： An antenna system includes a right-hand circularly polarized antenna for receiving Global Navigation Satellite System (GNSS) signals and located on a receiver housing; a vertical semitransparent screen for providing an Down/Up ratio DU 9 0 = DU ( θ e = 9 0 ∘ ) = F ( - 9 0 ∘ ) F ( 9 0 ∘ ) of −13 dB or better for at least some GNSS frequencies; the semitransparent screen being connected to a ground plane of the antenna; the ground plane being connected to a conductive receiver housing; the semitransparent screen further comprising a horizontal slot to which sets of lumped impedance elements are connected. Each set includes several lumped elements; where the lumped elements are capacitors and/or inductors and/or resistors; where the lumped elements in each set are connected in parallel or series; and the semitransparent screen including at least 4 segments arranged symmetrically around the center of the antenna and connected to each other.
-
公开(公告)号：US10381734B2
公开(公告)日：2019-08-13
申请号：US16094306
申请日：2017-03-10
摘要： A right-hand circularly-polarized patch antenna comprising a ground plane and a patch connected to each other with one or more wires for which the wire shape and location of the end points are selected such that they do not cause an antenna mismatch, and the electrical current carried in the wires produces an extra electromagnetic field subtracted from the patch field in the nadir direction.
-
公开(公告)号：US20170365929A1
公开(公告)日：2017-12-21
申请号：US15685235
申请日：2017-08-24
摘要： A quadrifilar helix antenna includes a cylindrical support extending along an antenna axis; a plurality of spiral conductors wrapped helically on the cylindrical support and along the antenna axis from a feed end to a remote end; a circular ground plane perpendicular to the antenna axis; and each of the spiral conductors including a plurality of gaps, with the gaps having capacitors between conducting portions of the spiral conductors. The capacitors are positioned higher than 60 mm above the ground plane, and capacitance value varies inversely with height. The antenna exhibits a DU(10°=−20 dB or better at an operating frequency f0=1575 MHz. The diameter of the cylindrical support is 30 +/−5 mm. A total height of the cylindrical support is 300 +/−50 mm. A winding angle of the helix is variable.
-
公开(公告)号：US20240297439A1
公开(公告)日：2024-09-05
申请号：US17800270
申请日：2022-01-14
CPC分类号： H01Q9/0421 , H01Q1/48 , H01Q9/0442 , H01Q9/045
摘要： Dual-fed antenna includes a ground plane; first and second metal patch radiators positioned over the ground plane, the first and second metal patch radiators are mirror images of each other; the first and second metal patch radiators separated by a meander-shaped gap, thereby forming an interdigitated structure, with each radiator having at least three digits; each digit shorted to the ground plane using a corresponding metal pin; each radiator having a coaxial feed implemented as a connector connected to it through the ground plane, or an aperture-coupled feed. Matching networks can be connected to the coaxial feeds at both ports or to microstrip lines connected to the slots of the aperture-coupled feeds. Each radiator can have tuning pins on an opposite side of the radiator from the digits, where each tuning pin can have a capacitive load. A dielectric plate can be placed between the radiators and the ground plane.
-
公开(公告)号：US20230402758A1
公开(公告)日：2023-12-14
申请号：US17436604
申请日：2021-03-02
CPC分类号： H01Q9/0464 , H01Q1/521
摘要： Antenna system includes an axially symmetric ground plane; a circular disc patch radiator positioned parallel to the ground plane; and a circular ring patch radiator positioned parallel to the ground plane and shorted to the ground plane using a cylindrical conductor at its inner radius; both radiators have the common axis of rotational symmetry; each radiator is excited with its own vertical metal pin, and both radiators are located at same height above the ground plane; and an axially symmetric capacitive decoupling element connecting a center of the disc patch to a center of the ground plane. Each vertical metal pin goes through the ground plane using through holes, and each vertical metal pin has a impedance matching network connected to it, and wherein the impedance matching network is connected to its transmission line section. The disc patch and the ring patch are isolated from the ground plane with dielectric.
-
公开(公告)号：US20180159210A1
公开(公告)日：2018-06-07
申请号：US15124071
申请日：2016-04-27
CPC分类号： H01Q1/42 , H01Q1/422 , H01Q1/425 , H01Q9/0428 , H01Q15/006 , H01Q19/021 , H01Q19/06
摘要： An antenna system includes a circularly-polarized antenna element with a Down/Up ratio in a proximity of a local horizon of no better than −12 dB. An antenna radome encloses the antenna element, the radome providing a drop of antenna pattern near a local horizon and having an upper transparent area and a lower semi-transparent area. The semi-transparent area is has a generally hemispherical shape. The semi-transparent area includes a circular metallized portion with vertical and horizontal slots, the metallized portion extending part of the way downward from an equator of the generally hemispherical shape. The metallized portion includes passive discrete electrical elements connected across at least some of the slots. The metallized portion can include multiple areas having different degrees of transparence. Each such area has a specified impedance. The discrete elements are capacitors, inductors and/or resistors. The metallized portion can have a plurality of circular rows separated by the horizontal slots.
-
公开(公告)号：US09673519B2
公开(公告)日：2017-06-06
申请号：US14357447
申请日：2013-04-11
摘要： An antenna system for a global navigation satellite system reference base station is disclosed. The antenna system includes an antenna positioned above a high capacitive impedance surface (HCIS) ground plane. Over a specific range of the lateral dimension of the HCIS ground plane and the height of the antenna above the HCIS ground plane, a high level of multipath suppression and high sensitivity for low-elevated satellites can be simultaneously maintained. The HCIS ground plane can be fabricated as a flat conducting plate with an array of conducting elements such as pins, pins with expanded tips, or mushroom structures. Alternatively, the HCIS can be fabricated as a flat conducting plate with a concentric series of choke rings. The antenna system can provide a positioning accuracy of +/−1 mm, an order of magnitude improvement over previous designs.
-
公开(公告)号：US12100900B2
公开(公告)日：2024-09-24
申请号：US17909221
申请日：2022-03-03
CPC分类号： H01Q5/20 , H01Q9/0421 , H01Q9/045
摘要： An integrated compact radio antenna system for receiving and transmitting 5G signals and receiving GNSS signals is described. The system comprises a high-precision GNSS antenna and a MIMO 5G multi-element antenna system. All the antennas within the proposed compact system are integrated with a shielded housing that enables electronic components of GNSS receiver and 5G modem to be arranged inside. The proposed integrated system has the following advantages: 1) compactness, 2) high efficiency of MIMO 5G antenna system, 3) a high degree of decoupling between 5G antennas, 4) a high degree of decoupling between 5G and GNSS antennas.
-
公开(公告)号：US11211712B1
公开(公告)日：2021-12-28
申请号：US16344476
申请日：2018-11-13
摘要： A GNSS-UHF antenna, including a first PCB having four sets of radiating elements, a second PCB below the first PCB, a metal plate below the second PCB, which form a quadrifilar helical antenna for operating with right-hand circularly polarized GNSS signals and simultaneously form a monopole antenna for operating with linearly polarized UHF signals; for each set of radiating elements, a corresponding downward-extending conductor connected to the second PCB at a first end and connected to the set of radiating elements at a second end through an inductor; a first coaxial cable outputting GNSS signals; the first cable includes a partial loop between the second shield and the metal plate; and a second cable outputting the UHF and its braiding connected to the metal plate.
-
-
-
-
-
-
-
-
-
搜索结果
23 条记录 (耗时 0.016 秒)
