Abstract: A miniaturized folded slot-based multiple-input-multiple-output (MIMO) antenna operating in the ultra high frequency (UHF) band for use in CubeSats. The MIMO antenna includes a circuit board having a front side and a back side separated by a dielectric material, a metallic coating covering the front side where the metallic coating is folded over a first edge and covers a first portion of the back side and is folded over a second edge and covers the second portion of the back side. A first meandering slot line is configured as a first antenna and a second meandering slot line is configured as a second antenna; a first metallic feed horn and a second metallic feed horn feed the first antenna and the second antenna, respectively. The antennas include a plurality of capacitors to tune a first resonance frequency of the first antenna and a second resonance frequency of the second antenna.

Abstract: A radio frequency transmission system and methods for mitigating multipath radio frequency interference are disclosed. Embodiments include a first helical antenna having a first radius and operable to receive a first electromagnetic signal, and a second helical antenna having a second radius and operable to receive a second electromagnetic signal. Further embodiments include a phase adjuster configured to receive the first electromagnetic signal as an input signal, apply an adjustable phase delay to the input signal, and output an adjusted electromagnetic signal. Still further embodiments include a signal combiner configured to receive the adjusted electromagnetic signal and the second electromagnetic signal and output a combined electromagnetic signal.

Abstract: A printed circuit board for an antenna comprising at least one antenna bay comprising an input port; a feed network and a radiative component is provided. The feed network has a center node connected to the input port; a printed circuit board (PCB), comprising an active surface having at least two feed micro-strips and a reference surface having at least two first reference micro-strips, the reference surface being opposite to the active surface. The radiative component has at least two dipoles, each of the at least two dipoles being shaped as a helix and being uniformly disposed about an antenna axis, each of the at least two dipoles comprising a dipole fed portion connected to one of the at least two feed micro-strips and a dipole reference portion connected to one of the at least two first reference micro-strips.

Abstract: A quadrifilar helix antenna may comprise a cylindrical body with a conductive layer. The antenna may further comprise a first slot disposed on the cylindrical body, wherein a length of the first slot is proportional to a first wavelength of a first signal. The antenna may further comprise a second slot disposed on the cylindrical body. The antenna may further comprise a first feed line crossing the first slot. The antenna may further comprise a second feed line crossing the second slot.

Abstract: A conductive structure is fabricated on a substrate (either flexible or rigid) by first printing a precursor seed layer of a conductive ink, then electroplating a highly conductive metal such as Cu or Ag onto the precursor. The plated layer has a conductivity approaching that of the bulk metal. To improve the uniformity of plating, an intervening layer of electroless metal may be deposited onto the precursor prior to electroplating. The structure may be used for applications such as coils used in a wireless power transfer system.

Abstract: An electronic device includes a housing configured to form an internal space, a radiating sheet configured to be disposed in the internal space; at least one electronic component configured to be disposed in the internal space and to be in contact with the radiating sheet. An FPCB antenna module configured to be disposed on the radiating sheet includes a conductive pattern and a nonconductive layer configured to surround the conductive pattern, wherein the nonconductive layer may extend on the radiating sheet to a region in which the electronic component is positioned.

Abstract: This antenna module (100) includes a dielectric substrate (130) and radiation electrodes (121) and a ground electrode (GND) that are arranged on or in the dielectric substrate (130). A plurality of openings (122) are formed in at least one electrode out of the radiation electrode (121) and the ground electrode (GND), the plurality of openings (122) penetrating through the electrode but not penetrating through the dielectric substrate (130).

Abstract: A deployable device includes a supporting structure, a deployable structure capable of switching from a configuration wound around a first axis to a configuration deployed according to a second axis substantially at right angles to the first axis, by being deployed by a length defined in a frame of reference of the supporting structure, wherein it further comprises a deployed length control device comprising a sensor and a computer linked to the sensor, a first conductive track electrically linked to the sensor extending on the deployable structure, substantially along the perimeter of the deployable structure, and forming one or more turns of a first coil in the wound configuration, and in that the sensor is configured to measure an electrical parameter from the first electrically conductive track which varies with the deployed length of the deployable structure and the computer is configured to determine the deployed length of the deployable structure.

Abstract: A system of spiral antennas is incorporated into aircraft body panels. The spiral antennas may be slot or printed material antennas, cavity backed for unidirectional communication, or open for bi-directional communication. The spiral antennas are operated in concert as a steerable array. The spiral antennas are utilized for various signal functions including ultra-wideband communications and electronic support measures interferometry.

Abstract: Described is an antenna comprising two oppositely wound antenna coils, each antenna coil formed by concentric conductor coils. An outermost conductor coil of one antenna coil is conductively connected to an outermost conductor coil of the other antenna coil via a shared conductive portion. An innermost conductor coil of each antenna coil terminates in a bridge connector, and a bridge conductively links the bridge connectors.

Abstract: An example dual-band antenna includes a substrate and a primary radiator disposed on the substrate and connected to a transmission line for driving the primary radiator, where the primary radiator, when driven via the transmission line, has a first resonant frequency. The dual-band antenna also includes a secondary radiator disposed on the substrate and unconnected to the primary radiator, where the primary radiator, when driven via the transmission line, induces a current in the secondary radiator such that the secondary radiator has a second resonant frequency different from the first resonant frequency.

Abstract: Apparatus and techniques described herein can include antenna configurations and related fabrication. For example, a Z-axis meandering antenna configuration can be fabricated, such as by forming a dielectric substrate extending in two dimensions and defining an undulating region extending out of a plane defined by the two dimensions; and forming at least one conductive region following a contour of the dielectric substrate including at least a portion of the undulating region. The at least one conductive region can follow the contour of the dielectric substrate, such as including a first conductive region on a first layer, and a second conductive region on another layer separate from the first conductive region of the first conductive layer.

Abstract: An antenna device includes a substrate, a feed line and an antenna. The substrate is formed with a non-opaque material. The feed line is disposed at the substrate and has a first terminal and a second terminal. The antenna is disposed at the substrate, electrically connected to the first terminal of the feed line, and is used to access a wireless signal. The second terminal of the feed line is electrically connected to a chip disposed on the substrate.

Abstract: The application comprises a system for regulating the transfer of energy in a contactless and wireless assembly, the regulation that is implemented in continuously measuring the voltage and/or the current directly at the output of the rectifier of the receiving part Rx of the assembly, and then in generating error signals from this/these measurement(s) and in transmitting them back to the transmitting part Tx via a communication that is independent of the transmitted power.

Abstract: A first antenna array includes antenna panels including: first antenna panels arranged on a first circle having a first radius, each of the first antenna panels including antenna elements; and second antenna panels arranged on a second circle having a second radius, each of the second antenna panels including antenna elements, the second circle being concentric with the first circle at a center point, the second antenna panels being arranged at a first angle around the center point with respect to the first antenna panels, the first radius, the second radius, and the first angle being computed in accordance with wireless transmission conditions including: a line-of-sight distance to a second antenna array including third antenna panels arranged on two or more circles; and a carrier frequency of a line-of-sight wireless transmission between the first antenna array and the second antenna array.

Abstract: A wearable non-contact communication device comprising a non-contact reader arranged to read an electronic marker and transmit information associated with the electronic marker to a user accessible device; wherein the reader includes a resilient antenna arranged to communicate with the electronic marker when the resilient antenna is engaged to the user.

Abstract: Methods and apparatus for a tunable dual spectrum antenna aperture including a RF antenna having first and second portions, wherein the first portion comprises a photoconductor material having a conductive state and a non-conductive state, and an IR sensor to detect IR energy. The state of the first portion determines a size of the RF antenna.

Abstract: A quadrifilar helical antenna includes a conical supporting medium, a feed network, and four sets of antenna composite elements. Each set of antenna composite element includes at least one short-circuit helical arm and at least one open-circuit helical arm. The short-circuit helical arm and the open-circuit helical arm in each set of antenna composite element are sequentially wound on an outer wall of the conical supporting medium in one winding direction. In an axial direction of the conical supporting medium, a projection length of the short-circuit helical arm is greater than that of the open-circuit helical arm in each set of antenna composite element. The four sets of antenna composite elements are respectively coupled to a feeding point of the feed network for feeding, and the short-circuit helical arms in the four sets of antenna composite elements are in short-circuit connection.

Abstract: A transmission device includes a coupler configured to convert a transmit signal to transmitted guided electromagnetic waves that propagate along a surface of a transmission medium without requiring an electrical return path, the coupler further configured to convert to a receive signal, received guided electromagnetic waves that propagate along the surface of the transmission medium without requiring an electrical return path. A housing is configured to provide environmental protection to the coupler. The housing includes an aperture section configured to pass the transmitted guided electromagnetic waves from the coupler through an aperture side of the housing, the aperture section further configured to pass the received guided electromagnetic waves to the coupler through the aperture side of the housing. The housing also includes a non-aperture section configured to absorb radio frequency (RF) signals in a frequency range of the transmit signal and a frequency range the receive signal.

Abstract: Apparatus and systems are disclosed and include a body having a plurality of slots. Each of the plurality of slots includes a first portion, a second portion, and a third portion. The first portion is located on a first surface of the body. The second portion is located on a second surface of the body and forms a helical shape. The third portion is located on a third surface of the body. The first surface and the second surface are non-parallel. The third surface and the second surface are non-parallel. The apparatus includes a plurality of antenna elements that are disposed in a respective one of the plurality of slots. The plurality of antenna elements is configured to receive radio frequency (RF) signals. The apparatus includes a ground plane that is coupled to a first end of each of the plurality of antenna elements.

Abstract: A transmitting station includes a plurality of transmitting weight multiplication units multiplying each of the transmission signal sequences by a transmitting weight, to be converted into MTX signals corresponding to UCAs forming an M-UCA so as to output the converted signals, and MTX transmitting OAM mode generation units inputting the signals corresponding to the UCAs and performing DFT on the input signals, so as to output to the corresponding UCA; and a receiving station includes MRX receiving OAM mode demultiplex units inputting signals from each of the UCAs forming the M-UCA and performing IDFT on the input signals, so as to output by each of received signal sequences, and a plurality of receiving weight multiplication units multiplying for each of them by a receiving weight, so as to demultiplex the spatially multiplexed received signal sequences and to output them in which interference between spatially multiplexed OAM modes is suppressed.

Abstract: A feed circuit for feeding an antenna includes: a first coupler including a first pair of opposing conductive elements; a second coupler including a second pair of opposing conductive elements; a third coupler including a third pair of opposing conductive elements; a delay line; first terminals configured to connect to the antenna; second terminals connected to a ground reference; and a feed terminal connected to the first coupler and configured to receive at least one of a transmit signal to be transmitted from the antenna or a combined received signal from the antenna. The first terminals are connected to the second coupler and the third coupler and configured to output a signal at different phases to conductive elements of the antenna. The second terminals are connected to the first coupler, the second coupler and the third coupler.

Abstract: A spiral antenna device includes one or more conductive spiral arms that are formed on a dielectric substrate attached to a wall of a cylindrical cavity. One or more coils are formed on the wall of the cylindrical cavity and are coupled to the one or more conductive spiral arms. Starting points of the one or more conductive spiral arms are in a center region of the dielectric substrate and ending points of the one or more conductive spiral arms are electrically coupled to first ends of the one or more coils.

Abstract: A communication device includes a dielectric substrate, a first coil antenna, a second coil antenna, and a switch circuit. The first coil antenna has a hollow region. The second coil antenna is disposed inside the hollow region of the first coil antenna. The dielectric substrate is configured to carry the first coil antenna and the second coil antenna. The switch circuit selectively enables at least one of the first coil antenna and the second coil antenna according to a power signal.

Abstract: A chip radio frequency package includes a substrate including a first cavity, first and second connection members, a core member, a radio frequency integrated circuit (RFIC) disposed on an upper surface of the substrate, and a first front-end integrated circuit (FEIC) disposed in the first cavity. The core member includes a core insulating layer and a core via that penetrates the core insulating layer. The first connection member has a structure in which a first insulating layer and a first wiring layer are stacked. The second connection member has a second structure in which a second insulating layer and a second wiring layer are stacked. The RFIC inputs or outputs a base signal and a first radio frequency (RF) signal having a frequency higher than a frequency of the base signal, and the first FEIC inputs or outputs the first RF signal and a second RF signal.

Abstract: A communication system is provided, including one or more antennas coupled to multiple RF paths, one or more matching blocks, each block including multiple matching networks, a look-up table including characterization data according to frequency bands and conditions, and a controller configured to control the multiple matching networks by referring to the look-up table to provide optimum impedance for a frequency band selected and a condition detected during a time interval. The matching block may further include switches and adjustment circuits.

Abstract: An antenna fabrication method includes depositing a conductive material on a surface of a double injection mold that includes a first surface portion comprising a primary material corresponding to a slot of the antenna and a second surface portion comprising an overmold material corresponding to a conductive surface of the antenna such that conductive material does not deposit on the primary material while it deposits on the secondary material, thereby resulting in multiple loops of the conductive material on the surface of the double injection mold, and providing two contact points to the conductive material, the contact points being separated from each other by a gap in the conductive material.

Abstract: A process of fabricating an electromagnetic circuit includes providing a first sheet of dielectric material including a top surface having at least one conductive trace and depositing a solder bump on the at least one conductive trace. The process further includes applying a second sheet of dielectric material to the first sheet of dielectric material with bond film sandwiched in between, the second sheet of dielectric material having a through-hole providing access to the solder bump. The process further includes bonding the first and second dielectric materials to one another and removing bond film resin from the solder bump. The process further includes machining the solder bump by the drilling or milling process to achieve a desired amount of solder in the solder bump.

Abstract: A printed circuit board including: a laminate having a plurality of stacked insulating layers including a rigid insulating layer; a flexible insulating layer having a partial region that overlaps and is in contact with at least one of the insulating layers and a remaining region disposed outside of the laminate; and a first antenna disposed on a surface of the laminate.

Abstract: Method of operating under water an antenna device comprising a frequency-tunable circuit, comprising: tuning said circuit between a first frequency and a second frequency for obtaining a variable directional radiation pattern by the antenna device, to select a directional radiation pattern of the antenna device for improving the radio signal coupling between the antenna devices, in particular for maximizing the radio signal coupling between the two antenna devices, wherein said first frequency and a second frequency are predetermined according to the saltwater-freshwater content of the water such that the directional radiation pattern of the antenna device for one of the two frequencies is directional and the directional pattern of the antenna device for the other of the two frequencies is omnidirectional.

Abstract: An antenna system and a mobile terminal implemented with the antenna system are provided. The mobile terminal has a metal frame and a system grounding. The antenna system has at least a first antenna module, a second antenna module, a third antenna module and a fourth antenna module. The first antenna module has a radiating body and a parasitic element coupled to the radiating body. The radiating body is configured to generate a main harmonic, and the parasitic element is configured to generate a parasitic harmonic. The first antenna module further has a first tuning circuit and a second tuning circuit. The antenna system has at least four operation modes. The antenna system of the present invention may achieve carrier aggregation of different LTE frequencies, and may be used as a MIMO antenna system.

Abstract: A phased array antenna is provided. The phased array antenna includes a tube shaped substrate. The phased array antenna further includes a plurality of antenna elements disposed on the substrate.

Abstract: The method for producing a microcircuit card including a film having a very low level of shrinkage between two overlay layers, carrying at least one electronic component and an assembly of layers in which a cavity is formed containing the film and the electronic component, involves: forming the assembly to include a central layer 16 made from a material having a very low level of shrinkage between two layers of a plastic material having a substantially higher level of shrinkage, for example PVC, forming, through the assembly, a cavity of which the surface area advantageously equals between 30% and 90% of the surface area of the outer faces of the microcircuit card that is to be produced, embedding the film and the electronic component in a resin so as to occupy the space in the cavity and laminating the two overlay layers.

Abstract: A hearing aid device comprising a behind-the-ear part, an at-the-head part, a coupling element, a second antenna, and a wireless interface is disclosed. The behind-the-ear part is adapted for being arranged at an ear of a user and for providing a low frequency signal comprising audio. The at-the-head part is adapted for being arranged at the head of the user. The at-the-head part includes a first antenna adapted to communicate with an implant part comprising at least one cochlear electrode adapted for being arranged in the cochlea in proximity of an auditory nerve of the user. The coupling element couples the behind-the-ear part and the at-the-head part and is adapted for transmitting the low frequency signal comprising audio to the at-the-head part. The second antenna is adapted for communicating at high frequency with an external unit. The wireless interface is adapted for receiving and/or sending data via the second antenna.

Abstract: An antenna 200, 300, 400 and associated systems 1400, 1500 and methods of use of an antenna 200, 300, 400 in downhole communication or detection. The antenna 200, 300, 400 comprises a plurality of planar substrates and wherein at least two of the plurality of planar substrates each comprise at least one conductive coil 830A-J, and the plurality of planar substrates are spaced apart. The system comprises a downhole arrangement defining a throughbore, a primary antenna and a secondary antenna. At least one of the primary and secondary antennae comprise a plurality of planar substrates. At least two of the plurality of planar substrates each comprise at least one conductive coil. The plurality of planar substrates are spaced apart.

Abstract: Two input/output terminals are provided on a lower surface of an RFIC element. An antenna element includes an elastic material and connecting portions respectively connected to the two input/output terminals of the RFIC element, a loop that includes the connecting portions, and open-ended linear antenna portions that define and function as radiators. The line width of the loop is greater than that of each of the linear antenna portions.

Abstract: Systems and methods are provided for labeling a piece of merchandise with a wireless communication device. In addition to a wireless communication device, the merchandise tag includes an associated label made of a washable fabric material. The wireless communication device is incorporated into the label and includes an RFID chip and a slot-loop hybrid antenna, with the antenna including a conductor sheet that defines a slot. The label is secured to a piece of merchandise at a sew line, with the sew line dividing the label into an upper portion and a lower portion. The RFID chip and the slot of the antenna are positioned within the upper portion of the label, which may itself be positioned within a seam or neckline or waistband of the piece of merchandise.

Abstract: A quadrifilar helical antenna for communicating in a plurality of different frequency bands comprises at least two ports. Each port is operationally coupled with a port-specific set of helical filars, the port-specific set of filars including at least one band-specific filar for each of said plurality of the different frequency bands. At least two of the band-specific filars, the band-specific filars belonging to different band-specific filars and different port-specific sets adjacent to each other, have mutual coupling between the ports, the mutual coupling resulting in a destructive phasing of the frequency bands between the at least two of the band-specific filars.

Abstract: A multi-filar helical antenna comprising a helical radiating element extending along a longitudinal axis, comprising an elongate body having a free first end and a second end opposite the first end and coupled to a feeding port, and a tail member, extending away from the body at the second end. The tail member has a geometry that is selected for modifying at least one of an impedance of the radiating element, and broadening the antenna's resonance bandwidth. The radiating element may comprise a positioning member extending away from the second end along a direction substantially parallel to the axis. An end portion of the positioning member is secured to an electrically conductive surface in connection with the feeding port. The second end is positioned at a given distance above the conductive surface and the radiating element is fed through the feeding port at the given distance above the conductive surface.

Abstract: An RFID tag 10 attachable to an article in use that includes an RFIC module including an RFIC chip and a helical coil connected to the RFIC chip, and an antenna member that is a threadlike conductor having a portion helically wound on the RFIC module around a winding axis extending parallel to an extending direction of a coil axis of the helical coil.

Abstract: According to examples of the disclosure, a wearable audio device is provided. The device includes a ground plane, an enclosure configured to enclose the ground plane, and configured to be coupled to an ear of a user, and an elliptically polarized spiral monopole antenna configured to be coupled to the ground plane. The antenna includes a ring and a plurality of arms, each arm of the plurality of arms being configured to be coupled between the ring and the ground plane.

Abstract: The invention relates to an antennal structure adapted to be disposed on an earth plane comprising: a three-dimensional support substrate made of a dielectric material which is partially hollowed out and comprising a peripheral wall which extends between a proximal end and a distal end, said support substrate defining an internal volume; a first conducting pattern inscribed on the peripheral wall of the support substrate, the first conducting pattern comprising a lower end adapted to be connected to an earth plane and an upper end; a second conducting pattern contained in the volume of the substrate, the second pattern being connected electrically to the upper end of the first pattern.

Abstract: A communications system such as a global position system (GPS) device, a spacecraft tracking device, a handheld radio, or any other communications device may include one or more helix antennas. Each helix antenna may include a conductive circular ring at a distal end of one or more helical arms. In a helical antenna with multiple arms, the arms may be shorted together at the distal end by the conductive circular ring.

Abstract: Disclosed are a method and apparatus for detecting a beam, which are used for realizing accurate beam forming under a millimeter wave wireless communication system where antenna array calibration is carried out without using a calibration network in the millimeter wave wireless communication system. The method for detecting a beam provided in the present application comprises: determining a beam with a pre-set width; and using the beam with the pre-set width to scan a user equipment.

Abstract: A spiral antenna, comprising a first arm and a second arm. The first arm and second arm are interlaced with each other. Each arm has a plurality of turns comprising an inner subset of circular turns, and an outer subset of turns, electrically coupled to the inner subset, having a shape with only four lines of symmetry. An array of such spiral antennas disposed a substrate that extends in a direction of a longitudinal axis and having a round cross section in a plan transverse to the longitudinal axis.

Abstract: A broadband helical microstrip antenna having a small foot print is disclosed. A PCB (printed circuit board) has a first planar side opposite a second planar side with dielectric material therebetween. The first planar side comprising a plurality of spaced apart non-linear antenna segments, each non-linear antenna segment having one or more electrical vias to the second planar side of the printed circuit board. The second planar side comprising a plurality of spaced apart parallel linear antenna segments. The plurality of non-linear antenna segments and the plurality of linear antenna segments form the broadband helical microstrip antenna symmetrical about a center line formed by a centered linear antenna segment of the plurality of spaced apart parallel linear antenna segments of the second planar side.

Abstract: A nonplanar metamaterial polarizer includes: a substrate including dielectric material transmissive to electromagnetic radiation and having a nonplanar shape; a first conductive pattern on a first side of the substrate; and a second conductive pattern on a second side of the substrate. The first and second conductive patterns are configured to alter the polarization of the electromagnetic radiation as it transmits through the substrate. In some cases, the first and second conductive patterns include split-ring resonators, and the nonplanar shape is a cylinder. An antenna system includes the nonplanar metamaterial polarizer and an antenna inside or adjacent to the nonplanar metamaterial polarizer and configured to transmit or receive the electromagnetic radiation through the nonplanar metamaterial polarizer while the nonplanar metamaterial polarizer alters the polarization of the transmitted or received electromagnetic radiation.

Abstract: An antenna module includes: a coil part including an antenna wiring disposed on an insulating substrate; a first magnetic part disposed on a first surface of the insulating substrate; and a second magnetic part disposed on a second surface of the insulating substrate, wherein the first magnetic part and the second magnetic part overlap with each other on a center region of the antenna wiring.

Abstract: An automated mobile antenna system has a motion sensor to detect whether it is moving or stationary. An omnidirectional antenna is used for communications while the system is moving, and a directional antenna may be used while the system is stationary. The output power of the transceiver can also be adjusted based on the selected antenna.

Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.