Abstract: A hybrid coupler for dividing an input electrical signal to produce first and second output electrical signals which are substantially out of phase, the hybrid coupler including an input port for receiving the input electrical signal, and an input line for coupling the input electrical signal to a slotline. The hybrid coupler further includes an output line for coupling the first and second output electrical signals to a first output port and a second output port, respectively. The output line has a junction with the slotline. The hybrid coupler further includes a co-planar waveguide electrically connected to said output line and having a first end and an opposing second end, and defining, at the second end, a sum port configured to divert common mode signals received at said first and second output ports to said second end. The slotline transitions into the first end of the co-planar waveguide.
August 21, 2018
Date of Patent:
October 4, 2022
BAE SYSTEMS PLC
Mark Christopher Nguyen, Gareth Michael Lewis
Abstract: A frequency reconfigurable miniaturized folded slot-based antenna for use with Internet of Things (IoT) devices. The antenna resonates at a lower band in the sub GHz range, and in an upper band at a low GHz range of 1 to 2 GHz. A front and a back side of a dielectric circuit board of the antenna includes a first metallic layer and a second metallic layer, respectively. Each metallic layer includes a meandering slot having a first and second plurality of connected legs, including at least a first leg, a center leg, and a last leg, respectively, where the first leg and the last leg wrap around the dielectric circuit board from the first metallic layer to the second metallic layer. The first metallic layer includes a varactor diode, a first choke and a second choke, and an open-ended microstrip transmission line for receiving signals from a feed line.
June 1, 2022
Date of Patent:
September 20, 2022
KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Abstract: Disclosed is an antenna phase shifter that comprises an outer conductive trace, an inner conductive trace, a wiper arm having a pivot point, and a capacitive coupler that capacitively couples an input port to the wiper arm conductive trace and capacitively couples the input port to a phase reference port. The capacitive coupler provided DC blocking between the input port and the phase reference port, and the input port may be coupled to a Bias-T such that the DC component present at the input port may be coupled to the Bias-T to drive the phase shifter wiper arm motor. In addition, the capacitive coupler provided constant capacitance while the wiper arm rotates.
Abstract: Circularly polarized directional antennas and methods of fabrication are provided. An antenna comprises conductive elements above a conductive reflector. The conducting elements are spaced radially outward from the center axis. The elements may be spaced equidistantly about each other or may be spaced between 10 and 80 degrees apart. The elements may be straight or curved. The elements may be a parallel to the reflector or may curve away or toward the reflector. The lengths and widths of each conductive element are adjusted to create or receive a circularly polarized wave of particular rotation based on the location in the element system. The elements are located within a printed circuit board that is bonded to a coaxial cable feedline placed above a metallic reflector. Each conducting element comprises a metallic wire.
Abstract: This document describes a folded waveguide for antenna. The folded waveguide may be an air waveguide and includes a hollow core that forms a rectangular opening in a longitudinal direction at one end, a closed wall at an opposite end, and a sinusoidal shape that folds back and forth about a longitudinal axis that runs in the longitudinal direction through the hollow core. The hollow core forms a plurality of radiation slots, each including a hole through one of multiple surfaces that defines the hollow core. The radiation slots are arranged on the one surface to produce a particular antenna pattern. The radiation slots and sinusoidal shape enable the folded waveguide to prevent grating lobes from appearing in the particular antenna pattern on either side of a horizontal-polarity, main beam, or to prevent X-band lobes from appearing in the particular antenna pattern on either side of a vertical-polarity, main beam.
Abstract: A sensor probe with reduced coupling between the various antenna elements and suppression of radio frequency interference. In one embodiment the sensor probe comprises a first antenna and a second antenna. A first and a second decoupling loop is electrically connected to one of the first and second antennas with current flow in opposite directions in the first and second decoupling loops. A third decoupling loop is electrically connected to another one of the first and second antennas and physically disposed between the first and second decoupling loops. Coupling between the first and second antennas is responsive to a location of the third decoupling loop relative to the first and second decoupling loops.
Abstract: A chip antenna module includes: a chip antenna including a body portion, a radiating portion, and a grounding portion, wherein the body portion is formed of a dielectric substance, and wherein the radiating portion and the grounding portion are disposed on different surfaces of the body portion from each other; and a substrate having a plurality of layers and including feeding pads bonded to the radiating portion, grounding pads bonded to the grounding portion, and dummy wiring layers disposed on at least one layer among the plurality of layers, below the feeding pads, wherein a resonance frequency of the chip antenna is determined by a number of the dummy wiring layers.
Abstract: A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.
Abstract: In the antenna device, a first insulating plate, a capacitive coupling portion of a tuning plate, a radio wave absorber, a grounding portion of the tuning plate folded back to the back side of the radio wave absorber, and a tuning coated plate provided with a metallic plated film formed on the surface thereof are sequentially stacked below an antenna element having a shape obtained by removing an arched portion from a copper circular plate. Power is supplied from a center conductor of a semi-rigid signal input member to a power feeding unit of the antenna element. An external conductor is held between the upper and lower conductive cushions. A grounding plate is conductive with the external conductor, to ground the grounding portion and the tuning coated plate.
Abstract: An antenna system is provided that can include a plurality of parasitic elements connected to and extending from a ground plane, wherein each of the plurality of parasitic elements can be oriented at a common pitch angle, wherein each of the plurality of parasitic elements can be positioned at a uniform distance from a center of an antenna disposed on the ground plane, and wherein a respective length of each of the plurality of parasitic elements, the common pitch angle, and/or the uniform distance can be optimized so as to broaden a beamwidth of a radiation pattern produced by the antenna.
Abstract: Methods and apparatus to provide a rectangular N×M antenna element subarray block having opposed first and second major surfaces and first and second ends at opposite ends of the block, wherein the antenna elements are located at the first end of the block. A coldplate between the first inlet connector and the first outlet connector enables flow of the liquid coolant from the first inlet connector to the first outlet connector. The first inlet connector is configured to enable flow of the liquid coolant into the system in a direction that is normal to the first major surface of the block.
Abstract: In an OAM multiplexing communication system in which an M-UCA is provided in each of a transmitting station and a receiving station, signals in a plurality of OAM modes are generated and transmitted from each UCA of the transmitting station, signals in the plurality of OAM modes are received and demultiplexed by each UCA of the transmitting station, and streams of the number of UCAs×the number of OAM modes are subjected to spatial multiplex transmission, in which the transmitting station includes a signal processing unit generating the streams to be transmitted in the plurality of OAM modes from each of the UCAs of the M-UCA, and the receiving station includes a signal processing unit receiving the signals in the plurality of OAM modes demultiplexed by each of the UCAs of the M-UCA, and demultiplexes the received signals for each stream from signals in an identical OAM mode.
September 25, 2018
Date of Patent:
August 9, 2022
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Abstract: A liquid crystal phase shifter includes a first substrate and a second substrate which are disposed oppositely, and a liquid crystal layer located between the first substrate and the second substrate. A first metal film layer is disposed on a side of the first substrate facing the second substrate. A second metal film layer is disposed on a side of the second substrate facing the first substrate. The first metal film layer and the second metal film layer are both patterned metal film layers. The first substrate and the second substrate are both PCBs. The present disclosure further provides a liquid crystal antenna, including the abovementioned liquid crystal phase shifter. The present disclosure further provides a manufacturing method of the liquid crystal phase shifter.
Abstract: The present invention relates to a feed-motion antenna device. Provided is an antenna for receiving data from low Earth orbit satellites, the antenna comprising a fixedly mounted antenna reflector, a moveable feed, a feed positioner configured to move the feed in the focal plane of the antenna reflector, the feed positioned having a primary rotation axis and an auxiliary rotation axis, and a control device configured to send control signals to the feed positioner. The primary rotation axis of the feed positioner passes through the center of the antenna reflector and the primary rotation axis is perpendicular to the focal plane of the antenna reflector; the auxiliary rotation axis of the feed positioner is parallel to the primary rotation axis. The feed positioner comprises an equal-arm structure comprising a first arm and a second arm, and each arm is arranged in a plane perpendicular to the primary and auxiliary rotation axes.
Abstract: To obtain a downsized dielectric filter suitable for a laminating structure, a dielectric filter is configured with use of a dielectric waveguide formed of a conductor pattern and vias in a laminating direction within a multilayer dielectric substrate, two strip lines formed in a planar direction of the multilayer dielectric substrate, and two strip line-waveguide converters each configured to perform transmission line conversion between the dielectric waveguide and each strip line. In this manner, it is possible to provide a dielectric filter for which an area to be occupied in the planar direction of the multilayer dielectric substrate is suppressed.
Abstract: The disclosed structures and methods are directed to transmission and reception of a radio-frequency (RF) wave. An antenna comprises a stack-up structure having a first control layer, a second control layer, a first and a second parallel-plate waveguides, and a plurality of through vias. The antenna further comprises a first central port and a second central port being configured to radiate RF wave into the two parallel-plate waveguides independently; vertical-polarization peripheral radiating elements integrated with the first control layer and configured to radiate RF wave in vertical polarization; and horizontal-polarization peripheral radiating elements integrated with the second control layer and configured to radiate RF wave in horizontal polarization. A central port for transmission of RF wave into the stack-up structure of the antenna is also provided.
Abstract: A compact radiofrequency driver includes at least one axial port intended to be connected to a radiating antenna, at least one output intended to collect received signals and at least one input intended to transmit signals, comprising first and second septum polarizers and a frequency filter, the second polarizer being connected, via its common port, to a first rectangular port of the first polarizer and the frequency filter being connected to the second rectangular port of the first polarizer and being configured to filter a reception or transmission frequency band, these two bands being different, and wherein at least one of the polarizers is configured to convert a circularly polarized signal received on said axial port of the driver into a linearly polarized signal in a reception frequency band and in that at least a second polarizer is configured to convert a linearly polarized signal transmitted to the driver by the input into a circularly polarized signal in a transmission frequency band.
Abstract: A converter includes an electrical opening which is a loop pattern, at one end of a conductor pattern located immediately above one end of a waveguide with a dielectric substrate interposed therebetween.
Abstract: An assembly for adjusting an electrically regulated antenna includes a control device, a motor and a cable. The control device is connected with the motor via the cable, and a shielding material in the assembly for adjusting the electrically regulated antenna comprises alum-glass cloth tape. The shielding material composed of the alum-glass cloth tape is used for improving the electromagnetic shielding effect, particularly the passive intermodulation effect, of an electrically regulated antenna system. The invention further relates to a method for manufacturing the assembly for adjusting the electrically regulated antenna.
Abstract: In some aspects, an apparatus includes a transformer including a first inductor, a second inductor, and a third inductor. The apparatus also includes a power amplifier coupled to the first inductor, a first antenna coupled to a first terminal of the second inductor, a second antenna coupled to a second terminal of the second inductor, a first switch coupled between the first terminal of the second inductor and a ground, a second switch coupled between the second terminal of the second inductor and the ground, and a low-noise amplifier coupled to the third inductor.
November 13, 2020
Date of Patent:
July 5, 2022
Muhammad Hassan, Jeremy Goldblatt, Bhushan Shanti Asuri, Jeremy Darren Dunworth, Abdellatif Bellaouar, Ravi Sridhara, Jorge Garcia