116results about How to "Improved radiation pattern" patented technology

The smart dynamic radiation pattern optimising system is a design and technique to actively shape & optimise the radiation pattern of mobile device controlled by smart RF / Antenna system with signal processing algorithm that works by sensing the change in device proximity environment with nature or property, range, orientation, position, location, signal quality parameters and ambient intelligence to protect the user by controlling radiation exposure, enhance RF signal quality and to save battery power. Mobile devices are handled in different proximity environment which influence the antenna performance due to electromagnetic interaction based on environments properties that leads to detuning, radiation pattern distortion, impedance mismatch etc which in turn degrades the signal quality. Also change in device orientation according to usage leads to power loss due to polarization mismatch. So when the signal quality degrades the system will sense & compute in an adaptive closed loop manner to actively optimise the radiation pattern according to scenarios. The design consist of (a) a sensor system 220 to determine the change in proximity environment [close vicinity] with sensing its property, sensing multi-direction, dimension, layer, position & range of proximity environment with respect to device, sensing device (antenna) orientation, visual sensing, infrared or thermal vision, user recognition, user head & hand hold effect, location, usage scenarios & operating modes and accordingly generate the trigger signal 230; (b) a processing unit 150 for computing the interrupt control signal 140 according to the nature of trigger signal & existing signal quality parameters; (c) Smart active radiation pattern optimiser 120 that works based on control signal; (d) Antenna system 110 capable of achieving dynamic radiation pattern coupled with radiation pattern optimiser that actively shapes and controls the radiation pattern accordingly to protect the user and also restores radiation according to scenarios to optimise communication. Other aspects of the present invention are the same sensor system 220 is utilised to develop an application that guides the user locate & position the mobile device in living space to achieve optimised performance, protect the mobile device from theft and ambient intelligence to alert & interact with the user.

A dual polarized variable beam tilt antenna (10) having a plurality of offset element trays (12) each supporting pairs of dipole elements (14) to orient the dipole element pattern boresight at a downtilt. The maximum squint level of the antenna is a consistent downtilt off of boresight and which is at the midpoint of the antenna tilt range. The antenna provides a high roll-off radiation pattern through the use of Yagi dipole elements configured in this arrangement, having a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, and is operable over an expanded frequency range.

Printed antenna devices are provided, which can operate at RF and microwave frequencies, for example, while simultaneously providing antenna performance characteristics such as high gain / directivity / radiation efficiency, high bandwidth, hemispherical radiation patterns, impedance, etc., that render the antennas suitable for voice communication, data communication or radar applications, for example. Further, apparatus are provided for integrally packaging such printed antenna devices with IC (integrated circuit) chips (e.g., transceiver) to construct IC packages for, e.g., wireless communications applications.

A trim panel, e.g., a roof lining for a vehicle passenger compartment, characterized in that the trim panel comprises an integral acoustic radiator and a vibration exciter mounted on the radiator to launch bending waves into the radiator to cause it to resonate to produce an acoustic output. The acoustic radiator has a periphery which is integral with the radiator and the trim panel.

A microwave antenna apparatus includes: a redistribution layer including a carrier layer, a ground plane arranged on a first or second surface of the carrier layer, and a microstrip line arranged on the other one of the first or second surface of the carrier layer; a semiconductor element mounted on the first surface of the carrier layer and coupled to the ground plane and the microstrip line; a mold layer that covers the semiconductor element and the first surface of the carrier layer; and a waveguide arranged within the mold layer and on the first surface of the carrier layer and coupled to the semiconductor element by the microstrip line, wherein a solid state filling material is arranged within the waveguide. Further, integrated antennas and transitions are presented within eWLB packages.

A dual polarized variable beam tilt antenna (10) having a plurality of offset element trays (12) each supporting pairs of dipole elements (14) to orient the dipole element pattern boresight at a downtilt. The maximum squint level of the antenna is a consistent downtilt off of boresight and which is at the midpoint of the antenna tilt range. The antenna provides a high roll-off radiation pattern through the use of Yagi dipole elements configured in this arrangement, having a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, and is operable over an expanded frequency range.

In a semiconductor light-emitting device formed by stacking a plurality of semiconductor layers including an active layer, at least a portion of a semiconductor layer of the plurality of semiconductor layers is made porous. The semiconductor layer made porous has a surface serving as a light-extraction surface for extracting light emitted from the active layer.

In a method of producing a quadrifilar antenna for circularly polarised radiation at frequencies above 200 MHz, the antenna is tuned by coupling it to a test source, measuring the relative phases and amplitudes of currents at predetermined positions in the individual elements of the antenna by means of probes capacitively coupled to the elements, and laser etching apertures in the elements to increase their inductance, the sizes of the apertures being computed according to the deviation of the measured relative phases from predetermined values.

An index-guided buried heterostructure AlGalnN laser diode provides improved mode stability and low threshold current when compared to conventional ridge waveguide structures. A short period superlattice is used to allow adequate cladding layer thickness for confinement without cracking. The intensity of the light lost due to leakage is reduced by about 2 orders of magnitude with an accompanying improvement in the far-field radiation pattern when compared to conventional structures.

A radiator coupled to an antenna patch disposed along a first end of the radiator, said patch disposed on an insulator. A ground plane is connected to the insulator and a radome is disposed opposite a second end of the radiator. The radome may have a region presenting a convex surface towards the radiator, and the radome has a second region presenting a concave surface towards the radiator. The first end of the conical radiator is the apex of the cone. A ground plane is included and a portion of the ground plane is a planar surface and another portion extends away from the planar portion towards the radome. Also disclosed is a method for forming a radiation pattern by shaping the radome to effectuate a predetermined radiation pattern using localized convex and concave surfaces positioned on the radome at different points in relation to the conical radiator.

A wireless mesh network comprising a plurality of mobile mesh devices coupled as nodes in a mesh network topology is provided herein. Generally speaking, each mobile mesh device may be a portable, self-contained unit, which does not require network or power wiring to communicate network traffic between the nodes. According to one embodiment, the mobile mesh device may include a small cell gateway for capturing, converting and re-routing cellular signals throughout and beyond the wireless mesh network. According to another embodiment, the mobile mesh device may include a real-time locating services (RTLS) hardware / software engine for capturing network traffic, identifying the identity and location of the device transmitting the network traffic, and triggering an action in response to either the identity and / or the location of the transmitting device. In some embodiments, the RTLS hardware / software engine may be combined with the small cell gateway to automatically re-route converted cellular signals throughout and beyond the wireless mesh network based on the identity of captured data packets.

An antenna structure for use in a wireless communication device, the structure comprising (i) a plurality of antenna portions each having a substantially planar radiating surface and (ii) a conducting ground portion; wherein the radiating surfaces of the antenna portions are substantially parallel to one another in a side-by-side relationship and are substantially parallel to part of the conducting ground portion located behind the antenna portions with respect to a direction of transmission of radiation from the antenna portions, the conducting ground portion comprising a first part galvanically connected to each of the antenna portions and, electrically coupled to the first part, a second conducting part forming at least part of a cover for a wireless communication device.

Provided is a dual band antenna including: a ground surface; a feeder feeding a predetermined current; an induction radiator including one end connected to the ground surface and the other end connected to the feeder; and a parasitic radiator including an end connected to the ground surface and the other end opened. An antenna having a smaller size than an existing IFA mainly used as an internal antenna in a portable terminal can be provided through the dual band antenna including the induction radiator and the parasitic radiator.

An omnidirectional ultra-wideband monopole antenna, with the characteristics of simple structure, easy fabrication and low cost, mainly comprises a ground plane, a U-shaped radiating member above the ground plane and a feeding member for feeding signals to the radiating member. The radiating member further comprises a first sub-radiating member parallel to the ground plane, with a first side edge and a corresponding second side edge, a second sub-radiating member connected to the first side edge and perpendicular to the first sub-radiating member, forming a first angle therebetween, and a third sub-radiating member connected to the second side edge to form a second angle. The second sub-radiating member and the third sub-radiating member are extended in the same upright direction above the ground plane. The antenna can provide good omnidirectional radiation patterns for frequencies across a very wide operating bandwidth.

In a method of producing a quadrifilar antenna for circularly polarised radiation at frequencies above 200 MHz, the antenna is tuned by coupling it to a test source, measuring the relative phases and amplitudes of currents at predetermined positions in the individual elements of the antenna by means of probes capacitively coupled to the elements, and laser etching apertures in the elements to increase their inductance, the sizes of the apertures being computed according to the deviation of the measured relative phases from predetermined values.

Several electromagnetic scattering structures are designed to improve antenna radiation patterns. The electromagnetic scattering structure has a conductive layer with certain patterns, and is applied on the radome of the base-station sector antenna. The electromagnetic waves radiating from the antenna therein induce scattering effects, which, together with the electromagnetic diffractions from the rear metal panel of the antenna, can substantially reduce the back lobe and the fields in regions not covered by the antenna. Thus, the antenna radiation patterns are improved so that a lower possibility of co-channel interferences between adjacent base stations can be achieved and therefore better efficiency of the base-station coverage also can be obtained.

Disclosed is a multiple meander strip monopole antenna, which can have a broad bandwidth and easily miniaturize the antenna by using a meander structure. A grounding conductor plate is coupled to the under face of a dielectric base plate. A radial cross-strip is disposed symmetrically at the center of the upper surface of the dielectric base plate. Each radiating member of a multiple radiator is connected to the end portion of each corresponding branch of the radial cross-strip and stands substantially perpendicular to the base plate. Each radiating member is composed of a vertical strip section having a tapered structure, in which its width is progressively widened upwardly for an impedance matching and at least one meander strip section connected integrally to the upper end of the vertical strip section. When a feeding is carried out at the center of the radial cross-strip, a signal radiated from the multiple radiator is cancelled out in the axial direction of θ=0° and a radiation gain is increased as θ increases, thereby providing a conical beam radiation pattern. A broad bandwidth from 2.9 GHz to 10.85 GHz can be achieved and an excellent monopole radiation pattern having the same gain in all directions can also be achieved.

Shields for radiotelephones with a retractable antenna include a conductive tubular antenna guide operably associated with an electronic ground, and preferably configured to form an inductor or capacitor in a matching circuit operable when the antenna is in the retracted position. Associated methods include directing RF radiation produced by the antenna positioned internal to the radiotelephone along a longitudinal exit path out of the radiotelephone.

A wireless mesh network comprising a plurality of mobile mesh devices coupled as nodes in a mesh network topology is provided herein. Generally speaking, each mobile mesh device may be a portable, self-contained unit, which does not require network or power wiring to communicate network traffic between the nodes. According to one embodiment, the mobile mesh device may include a plurality of dipole antennas, which are enclosed within the mobile mesh device and configured to forward network traffic. At least one of the dipole antennas may be a frequency adjustable end-fed dipole antenna comprising a channel selection pin, which can be adjusted up or down along the dipole axis to change a resonant frequency of the dipole antenna. A method for setting or adjusting a resonant frequency of a frequency adjustable end-fed dipole antenna is also provided herein.

The invention provides a microwave broadband decoupled network based on a signal interference concept. According to the structure, removal of mutual coupling between coupled antennas serves as a design starting point, according to a signal interference method, two same broadband directional couplers are connected to serve as a guide-in path, mutual coupling energy of the antennas and energy of the guide-in path generate voltage zero points on a connecting line and then are offset, and therefore the broadband decoupled network is obtained. The decoupled network is of a plane micro-strip structure, and a dielectric slab is made of FR4. With the cooperation of thin film chip resistors, the structure is simple, machining is easy, cost and weight are low, and therefore large-scale production can be achieved. A novel technical scheme is provided for front end design of a broadband receiving and transmitting system, and the combination modes of microwave passive circuits are increased.

The invention discloses a difference coplanar waveguide UWB (Ultra Wide Band) wide slot trapped wave antenna with a high attenuation band characteristic. The difference coplanar waveguide UWB wide slot trapped wave antenna comprises a dielectric substrate, wherein a first feed circuit, a second feed circuit and a wide slot ground structure are arranged on the front face of the dielectric substrate; the first feed circuit and the second feed circuit are in bilateral symmetry to form a difference coplanar waveguide feed structure; the first feed circuit comprises a first feed port, a first micro-strip feed wire and a first radiating body; the second feed circuit comprises a second feed port, a second micro-strip feed wire and a second radiating body; the first radiating body is connected with the first feed port by the first micro-strip feed wire; the second radiating body is connected with the second feed port by the second micro-strip feed wire; a first resonance branch knot and a second resonance branch knot are respectively arranged on the upper part and the lower part of the inner side of a polygonal wide slot on the wide slot ground structure; the first and second resonance branch knots are vertically symmetrical. The antenna is simple in structure and is capable of realizing a trapped wave function.

A subreflector of a dual-reflector antenna comprises a first extremity comprising a convex inner surface, a second extremity adapted for coupling to the extremity of a waveguide, and a body extending between the first extremity and the second extremity. The body comprises a first dielectric part having a portion penetrating into the waveguide and a portion outside the waveguide, and a second metallic part comprising a first cylindrical portion, contiguous with the first extremity of the subreflector, whose diameter is greater than the portion outside the waveguide of the first dielectric part, and a second cylindrical portion, adjacent to the first cylindrical portion, extended by a conical portion that penetrates into the first dielectric part. The first cylindrical portion features a flat ring-shaped surface that forms an angle less than 90° with the axis of the subreflector so as to face the primary reflector.

An antenna includes a ground plane, a dielectric, and an active radiating element. The dielectric is disposed on the ground plane, and the active radiating element is embedded in the dielectric for transmitting and / or receiving an RF signal. The antenna also includes a feeding element and a passive radiating element. The feeding element extends into the dielectric and is electrically coupled to the active radiating element. The passive radiating element is disposed on the ground plane and surrounds a periphery of the dielectric for perturbating the RF signal. The ground plane has a plurality of edges. At least one of the edges extends as a curvilinear lip. The curvilinear lip extends in a direction opposite the passive radiating element for directing the RF signal and for preventing abrupt discontinuity of the RF signal.

A printed antenna comprises an ink-printed layer, a hard substrate and a radiation conductor layer. The hard substrate has a surface, and the ink-printed layer is coated on the surface to form a non-transparent area. The uncoated region of the surface is a transparent area. The radiation conductor layer is formed on the ink-printed layer and does not exceed the non-transparent area of the hard substrate. In the present invention, a conductive ink is coated on the surface of a non-metallic plate, such as a glass plate, an acrylic plate or an LCD panel, to form the radiation conductor layer. Therefore, the printed antenna of the present invention is exempt from the complicated processes of fabricating the conventional metallic radiation conductors with the application field thereof expanded.

An omni-directional triband antenna operates without ground radials with gain commensurate with a half wavelength vertical on each band. The triband antenna includes a dual-band twinlead J-pole providing half wavelength radiators for UHF and VHF, and an impedance transformer defining feedpoints to which a length Lc of coaxial cable is attached. The Lc lower end is the triband antenna connector port. Intermediate band radiators are first and second wire elements that collectively are a half-wavelength at the intermediate band. The first element is wound helically about the impedance transformer, with upper end floating and lower end connected to a first feedpoint. The second element is wound helically about the Lc upper portion of coaxial cable, with upper end connected to the remaining feedpoint, and lower end of the element floating. The helical windings radiate vertically and there is no cross-interference between antenna radiation in any of the three bands.