Abstract: An antenna structure includes a dielectric substrate, a slot antenna, and a feeding strip. The dielectric substrate has a first surface and a second surface opposite to the first surface. The slot antenna includes a ground plane positioned on the first surface of the dielectric substrate, and a slot defined in the ground plane where the conductive material is missing. The slot opens at an edge of the ground plane. The feeding strip is positioned on the second surface of the dielectric substrate and extends across the slot, the feeding strip resonates with the slot antenna.

Abstract: Techniques for utilization of antenna loading for impedance matching are described. In at least some embodiments, a device (e.g., a smart phone) includes multiple antennas that are employed to send and receive wireless signals for the device. The device further includes impedance matching functionality communicatively connected to the antennas, and configured to perform impedance matching for one of the antennas based on loading (e.g., dielectric loading) of another of the antennas.

Abstract: In some embodiments, an apparatus includes a protective cover configured to attach to a wireless device having a surface including a first portion and a second portion mutually exclusive from the first portion. The second portion of the surface is associated with a proximity sensor of the wireless device. The protective cover is configured to cover the first portion of the surface when the protective cover is attached to the wireless device. The protective cover is configured to not cover the second portion of the surface when the protective cover is attached to the wireless device such that the proximity sensor is not triggered by the protective cover when the protective cover is attached to the wireless device and when the wireless device is operational.

Abstract: An electronic device having a radiation part and a metallic frame is provided. The radiation part is L-shaped, and includes a feeding branch and an open branch. The metallic frame includes a first metallic part and a second metallic part. The first metallic part is L-shaped, wherein a first side of the first metallic part is near the open branch of the radiation part, and a first gap exists therebetween. The second metallic part is L-shaped, wherein an open terminal of a first side of the second metallic part is aligned with an open terminal of the first side of the first metallic part, and a second gap exists therebetween. The radiation part and the metallic frame forms an antenna to transceive a plurality of radio frequency signals.

Abstract: This invention discloses a design and fabrication of a high performance compact antenna to receive public airwaves HDTV signals. The subject antenna consists of a high efficient cone shape broadband element excited over a small metal ground plane. A reflecting surface is implemented to help rejecting any unwanted multiple reflecting signals from the surrounding objects. Outstanding impedance characteristics and broad pattern coverage have been obtained. The pattern coverage is omnidirectional. The polarization is linear along the cone axis. This antenna design operates well in a weak signal environment and as a result the antenna can receive a large number of public channels. Although the antenna measures only 5¾×5¾×3¼ inches in a cubical enclosure or in a 6? inches diameter by 3½ inches depth cylindrical body, the antenna packaged in either enclosure can receive more public channels than a much larger antenna twice of its size.

Abstract: A broadband antenna element for RF transmission and reception over cellular frequencies. The antenna element is formed of conductive material on a substrate surface of conductive material in the form of a pair of half portions extending in opposite directions to distal tips defining the widest distance of a mouth of a cavity. The mouth converges to reduce in cross-section to a narrowest point at a plurality of different flare angles defined by the edges of the two half portions in between the pair of half portions forming the element. The resulting antenna element radiates and receives a wide band cellular frequencies enabling a single element to serve different providers operating on different frequency bands in the cellular spectrum between 680 MHz to 1900 MHz.

Abstract: A portable terminal is described where the portable terminal includes a first frame body and a second frame body. The first frame body is used for an antenna unit of the portable terminal and a gap is set in a first partial area of the first frame body with the first partial area with a gap being set is covered by the second frame body.

Abstract: An antenna comprising a plurality of carrier blocks, wherein each carrier block is coupled to at least one other carrier block, and a plurality of radiators, wherein each radiator is connected to at least one carrier block. Further, an antenna comprising a plurality of carrier blocks, wherein each carrier block is coupled with at least one other carrier block, and a radiator connected to at least two of the plurality of carrier blocks.

Abstract: Electronic devices may be provided that include radio-frequency transceiver circuitry and antennas. An antenna may be formed from an antenna resonating element and an antenna ground. The antenna resonating element may have a shorter portion that resonates at higher communications band frequencies and a longer portion that resonates at lower communications band frequencies. The resonating element may be formed from a peripheral conductive electronic device housing structure that is separated from the antenna ground by an opening. A parasitic monopole antenna resonating element or parasitic loop antenna resonating element may be located in the opening. Antenna tuning in the higher communications band may be implemented using an adjustable inductor in the parasitic element. Antenna tuning in the lower communications band may be implemented using an adjustable inductor that couples the antenna resonating element to the antenna ground.

Abstract: The antenna radiating element includes an antenna configured to transmit a signal having one or more measurable characteristics and a shroud surrounding the antenna and configured to change the one or more measurable characteristics.

Abstract: An antenna includes a main reflector with a focal circle about an axis. A waveguide horn extends from the main reflector along this axis. A sub-reflector is mounted beyond the distal end of the waveguide horn with an annular gap remaining between the sub-reflector and the distal end of the waveguide horn. The annular gap forms a radial transmission line between a first wall on the sub-reflector and a second wall having outer annular corrugated surfaces on the distal end of the waveguide horn. The first wall of the transmission line is a body of revolution of elliptical shape on the sub-reflector. This ellipse is tilted at an angle with respect to the axis, and has a first focal point on the axis. The other focal point is preferably on or near the focal circle. The phase center of the waveguide horn does not coincide with either foci.

Abstract: An electronic device may include balance-fed antenna structures that do not have direct paths to ground. The antenna structures may serve as a Global Positioning System (GPS) antenna and may have a dipole structure having a first and second antenna resonating element arms. The antenna structures may include a conductive path that conveys antenna signals between a first feed terminal on the first antenna resonating element arm and a transmission line. The conductive path may overlap with the second antenna resonating element arm such that current flow through the conductive path induces corresponding current flow in the second antenna resonating element arm. The antenna structures may include an impedance matching short-circuit stub path that couples the first antenna resonating element arm to the second antenna resonating element arm. Choke inductors may be used to help block indirect paths from the antenna structures to ground through adjacent circuitry.

Abstract: A circularly polarized artificial impedance surface antenna (AISA) includes an impedance modulated substrate having a modulated scalar impedance to a surface wave traversing a top surface of the substrate, wherein the impedance modulation has a plurality of intertwined lines of constant impedance, and wherein each line of constant impedance follows a spiral elliptical path.

Abstract: Disclosed herein are example embodiments of a dielectrically loaded multifilar antenna for circularly polarised radiation the antenna having a plurality of operating frequencies in excess of 200 MHz. In one embodiment, the antenna comprises: an electrically insulative core having proximal and distal surface portions and, between the proximal and distal surface portions, a laterally directed side surface portion; a pair of feed nodes; at least four elongate generally helical conductive radiating elements located on the core; and, arranged between and coupling together the feed nodes and the radiating elements, a phasing ring formed by a closed loop, wherein the phasing ring is resonant at least two of the operating frequencies, the elongate antenna elements being coupled to the phasing ring at respective spaced apart coupling locations and extending from the phasing ring in a direction away from the feed nodes.

Abstract: A passive element has an electrical length such that a resonance mode thereof is in a target frequency band, and first and second feed elements, each of which has an electrical length such that a resonance mode thereof is not in the target frequency band. The first feed element has a first coupling conductive part, and a first connecting conductive part, which has a continuous shape with the first coupling conductive part. The second feed element has a second coupling conductive part, and a second connecting conductive part, which has a continuous shape with the second coupling conductive part. The first coupling conductive part is disposed parallel and adjacent to the passive element. The second coupling conductive part is disposed parallel and adjacent to the passive element. The first connecting conductive part and the second connecting conductive part are disposed adjacent and parallel to each other.

Abstract: A bi-directional antenna includes a plurality of unit cells stacked in two perpendicular planes (Y-X and Z-X planes) to form cube shaped unit cells whereby inductive loops are placed on four faces corresponding to the Y-X and Z-X planes. Each unit cell includes a magnetic permeability enhanced metamaterial. The resulting antenna has the ability to couple magnetic fields oriented in both the X and Y directions with increased permeabilities and can be used to realize a variety of different antenna architectures that do not have their magnetic field confined in a single direction.

Abstract: An antenna apparatus includes: a first member ground-connected to a ground of a printed circuit board (PCB); a second member spaced from the first member in parallel, and configured to capacitive coupling-feed the first member so as to transmit and receive signals of a first frequency band; and a third member extending from the second member by a prescribed length, so as to have a bandwidth extending up to a second frequency band adjacent to the first frequency band.

Abstract: An antenna includes a first radiating array coupled to the mast and a second radiating array coupled to the mast. Each of the first and second radiating arrays comprises a plurality of dipoles associated with a radiation frequency, each dipole coupled to the mast by a standoff. The two arrays are mounted approximately opposite to each other relative to the mast, rather than one array on top of the other array. The antenna may be part of a Positive Train Control (PTC) system and be disposed in proximity to a train track.

Abstract: The antenna device disclosed includes an insulating antenna case, an antenna base, an umbrella-type element, an amplifier substrate, and a coil. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna case is fitted on the antenna base. The umbrella-type element is provided on the antenna base. The amplifier substrate includes an amplifier which amplifies a signal received by the umbrella-type element, and is disposed on the antenna base. The coil is inserted between an output end of the umbrella-type element and an input end of the amplifier to make the umbrella-type element resonate at a predetermined frequency, and is disposed substantially at a center in a width direction of the umbrella-type element.

Abstract: Disclosed is a circular polarized antenna structure, comprising a main body, a protruding portion and a stopping portion, the stopping portion being formed between the main body and the protruding portion. The circular polarized antenna may be disposed to penetrate through the upper and lower surfaces of a base that has a radiation conductor and a grounding conductor disposed thereon respectively, the stopping portion abutting against the lower surface of the base to prevent the main body from coming loose and being detached from the base even if the protruding portion is subjected to a great impact or squeezing pressure caused by an external force coming from the lower surface upwards.