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3900results about "Substantially flat resonant elements" patented technology

Ceramic antenna module and methods of manufacture thereof

ActiveUS20060092079A1Minimize reflection lossWithout adversely impacting radiation efficiencySimultaneous aerial operationsSolid-state devicesRF front endPermittivity
Circuit modules and methods of construction thereof that contain composite meta-material dielectric bodies that have high effective values of real permittivity but which minimize reflective losses, through the use of host dielectric (organic or ceramic), materials having relative permittivities substantially less than ceramic dielectric inclusions embedded therein. The composite meta-material bodies permit reductions in physical lengths of electrically conducting elements such as antenna element(s) without adversely impacting radiation efficiency. The meta-material structure may additionally provide frequency band filtering functions that would normally be provided by other components typically found in an RF front-end.
Owner:DE ROCHEMONT L PIERRE

Vehicle rearview mirror assembly incorporating a communication system

A vehicle communication and control system is provided that may be more readily installed in a vehicle and that utilizes minimal additional wiring. According to some of the disclosed embodiments, the electrical components of the “brick” of a communication and control system are integrated into a rearview mirror assembly. Preferably, the microwave antenna for the GPS and the cellular telephone antenna are also integrated into the rearview mirror assembly. Various functions and features of the system are also disclosed.
Owner:GENTEX CORP

System and method for dual-band antenna matching

A dual-band antenna matching system and a method for dual-band impedance matching are provided. The method comprises: accepting a frequency-dependent impedance from an antenna; and, selectively supplying a conjugate impedance match for the antenna at either a first and a second communication band, or a third and a fourth communication band. More specifically, the method comprises: tuning a first tuning circuit to a first frequency; and, simultaneously tuning a second tuning circuit to a second frequency. In response, a conjugate match is supplied to the antenna in the first communication band in response to the first frequency. Simultaneously, the antenna is matched in the second communication band in response to the second frequency. When the first tuning circuit is tuned to a third frequency, and the second tuning circuit is tuned to a fourth frequency, then conjugate matches are supplied for the third and fourth communication bands, responsive to the third and fourth frequencies, respectively.
Owner:KYOCERA CORP

Apparatus for vehicle internetworks

Vehicle internetworks provide for communications among diverse electronic devices within a vehicle, and for communications among these devices and networks external to the vehicle. The vehicle internetwork comprises specific devices, software, and protocols, and provides for security for essential vehicle functions and data communications, ease of integration of new devices and services to the vehicle internetwork, and ease of addition of services linking the vehicle to external networks such as the Internet.
Owner:INTELLECTUAL VENTURES I LLC

Method and apparatus for implementation of a wireless power supply

An apparatus, for wirelessly powering a device having an enclosure for a charge storage component, includes a wireless power supply which fits into the enclosure. The apparatus includes an antenna connected to the wireless power supply. A battery. A cell phone cover for a cell phone. A headphone. A wireless power adapter for a DC jack. Alternatively, the apparatus includes a substrate having discrete components and integrated circuits disposed in the device. A method for wirelessly powering a device having an enclosure for a charge storage component.
Owner:POWERCAST

Detection of fluids in tissue

A method of detecting a change (that is, an increase or a decrease) in the level of fluid in tissue in a first area of a body includes the steps of: applying electromagnetic energy, preferably in the frequency range of approximately 300 MHz to approximately 30 GHz, to a first volume of the body; measuring a resultant or returned signal; comparing the signal to a reference signal to determine if the fluid level in the tissue has changed. In one embodiment, the method detects changes in the level of fluid in tissue of a body by applying electromagnetic energy to a first volume of the body over a period of time (for example, using an antenna or antennae); measuring a resultant signal or a signal returned from the tissue; and comparing the signal to a reference signal to determine if a level of fluid in the tissue has changed during the period of time.
Owner:BAYER HEALTHCARE LLC

Programmable radio frequency sub-system with integrated antennas and filters and wireless communication device using same

The present invention relates generally to radio communication devices. More particularly, the present invention relates to a programmable radio frequency (RF) sub-system and wireless communications devices using such an integrated antenna / filter sub-system. In one embodiment, the programmable RF front end subassembly includes two antennas, RF filter sections that are integral to each antenna, and a programmable logic device as an antenna control unit. Each antenna consists of a planar inverted "F" antenna (PIFA) that is tuned to operate over a range of frequencies using voltage variable capacitors or RF switches that connect various capacitive loads in order to achieve the desired resonant frequencies. The wireless communication device further includes a control circuit coupled to the antenna to provide the control signals.
Owner:E TENNA CORP

Methods and Apparatuses for Adaptively Controlling Antenna Parameters to Enhance Efficiency and Maintain Antenna Size Compactness

A communications apparatus comprising a first antenna, a first serial configuration of a first power amplifier and a first matching network, a second serial configuration of a second power amplifier and a second matching network, a switching element for switchably selecting the first or the second serial configuration for supplying a signal to the first antenna, the first and the second power amplifiers supplying a respective first signal of a first power and a second signal of a second power different than the first power to the first antenna for transmitting and the first and the second matching networks presenting respective first and second impedances to the respective first and second power amplifiers, the first and the second impedances responsive respectively to a power-related parameter of the first and the second signals.
Owner:SKYCROSS INC

Electromagnetic sensors for biological tissue applications and methods for their use

ActiveUS7591792B2Improves signal couplingImproves resulting measurementElectrotherapyAntenna supports/mountingsMeasurement pointEngineering
Tissue sensors house one or more sensor elements. Each element has a housing mounted substrate and a superstrate with a planar antenna between. A transitional periphery (TP) of a superstrate outer surface interconnects a base to a plateau. At least some of the TP has a generally smooth transition. Plural elements are spaced by the housing. Alternately, the superstrate TP is flat, the housing extends to the outer superstrate surface and a shield surrounds the element. The housing is flush with or recessed below the superstrate and defines a TP between the housing and superstrate. A method converts a reference signal to complex form; plots it in a complex plane as a reference point (RP); converts a measurement signal to complex form; plots it in the complex plane as a measurement point (MP); determine a complex distance between the MP and the RP; and compares complex distance to a threshold.
Owner:BAYER HEALTHCARE LLC

Multi-band radiating elements with composite right/left-handed meta-material transmission line

Dual-band and multi-band radiating elements are described based on composite right / left-handed (CRLH) meta-material transmission line (TL). These elements can operate as resonators and / or antennas depending on feed-line configuration. The radiating elements are based on the fundamental backward wave supported by a composite right / left-handed (CRLH) meta-material transmission line (TL). Unit-cells of the transmission line comprise conductive patches coupled through vias to a ground plane. The physical size and operational frequencies of the radiating element is determined by the unit cell of the CRLH meta-material. This radiating element is configured for monopolar radiation at a first resonant frequency and patch-like radiation at a second resonant frequency. The first and second resonant frequencies are not constrained to a harmonic relationship.
Owner:RGT UNIV OF CALIFORNIA

Microstrip antenna for an identification appliance

An identification appliance, such as a wristband, bracelet, patch, headband, necklace, card, sticker, or other wearable appliance, has an improved patch or microstrip antenna. The microstrip antenna comprises a conductive patch layer, a conductive ground layer and a dielectric layer in between the conductive layers. The microstrip antenna is mounted to or disposed in the identification appliance, where preferably the ground layer is closest to the user and the patch layer is furthest from the user. Electronic circuits may be located in the dielectric layer, on a surface of a conductive layer, or on another part of the identification appliance. Connecting holes through the dielectric layer may allow circuits to be connected to a conductive layer or layers. This improved antenna resolves detuning and communication degradation problems.
Owner:PRECISION DYNAMICS CORPORATION

Antenna system and method

InactiveUS20050159187A1Maximize near-field to far field ratioMinimize peak far-field gainAntenna supports/mountingsPosition fixationPhase shiftedTransmitted power
An embodiment of the present invention provides an antenna system, comprising a plurality of non-uniformly spaced antenna elements arranged substantially linearly, a power divider for dividing transmit power thereby coupling signals to the plurality of antenna elements, a phase shifter capable of phase shifting the signals between the power divider and the plurality of antenna elements such that radiated signals from each antenna element add coherently such that the radiated electromagnetic energy may be focused at a focal point in the near field region or in the Fresnel region of the antenna system. An embodiment of the present invention may also provide at least one additional receive antenna element capable of receiving signals backscattered from at least one RFID tag located in the near field of the focused array and the divider may create substantially equal power levels feeding each antenna element. The antenna elements may be similar or identical and each element may be oriented such that the individual element main beam may point in a unique direction.
Owner:NXP USA INC

Microstrip antenna for RFID device

Microstrip patch antenna (46), feed structure (48), and matching circuit (50) designs for an RFID tag (10). A balanced feed design using balanced feeds coupled by a shorting stub (56) to create a virtual short between the two feeds so as to eliminate the need for physically connecting substrate to the ground plane. A dual feed structure design using a four-terminal IC can be connected to two antennas (46a,46b) resonating at different frequencies so as to provide directional and polarization diversity. A combined near / field-far / field design using a microstrip antenna providing electromagnetic coupling for far-field operation, and a looping matching circuit providing inductive coupling for near-field operation. A dual-antenna design using first and second microstrip antennas providing directional diversity when affixed to a cylindrical or conical object, and a protective superstrate (66). An annual antenna (46c) design for application to the top of a metal cylinder around a stem.
Owner:UNIVERSITY OF KANSAS

Antenna array with asymmetric elements

An RFID reader is provided that includes an antenna array comprising multiple antenna elements circumferentially distributed around a longitudinal axis of the antenna array. Each antenna element includes multiple patch elements disposed above one or more underlying substrates, wherein the patch elements of each antenna element are disposed on an outer side of the antenna element. Further, one or more of the antenna elements is an asymmetric antenna element, wherein a first end of the asymmetric antenna element is wider than a second, opposite end of the asymmetric antenna element, wherein a first patch element disposed proximate to the first end of the asymmetric antenna element is larger than a second patch element disposed proximate to the second end of the asymmetric antenna element, and wherein a resonant frequency associated with the first patch element is approximately the same as a resonant frequency associated with the second patch element.
Owner:SYMBOL TECH LLC

Microstrip arrangement

The invention relates to a microstrip arrangement comprising a first and a second microstrip conductor. The two microstrip conductors have essentially the same dimensions in their longitudinal direction and transverse direction, and are galvanically interconnected by means of at least one connection. The two microstrip conductors also extend essentially parallel to one another on either side of a dielectric material. As a result of this design of the microstrip arrangement, the field losses and also other influences caused by the dielectric material will be very considerably reduced, and in practice a resultant microstrip arrangement is obtained, which, with regard to its electrical performance, appears to be suspended in the air. Preferred embodiments comprise a microstrip antenna, a circuit board and a conductor application.
Owner:HIGHBRIDGE PRINCIPAL STRATEGIES LLC AS COLLATERAL AGENT

RFID tag reading system and method

An embodiment of the present invention provides an RFID tag reading system, comprising an antenna system associated with a portal through which said RFID tag may pass, said antenna system comprising: a plurality of non-uniformly spaced antenna elements arranged substantially linearly; a power divider for dividing transmit power thereby coupling signals to said plurality of antenna elements; and a beamforming network capable of phase shifting the signals between the power divider and the plurality of antenna elements such that radiated signals from each antenna element add coherently such that the radiated electromagnetic energy is focused at a focal point in the near field region or in the Fresnel region of said antenna system.
Owner:NXP USA INC

Hand-mounted indicia-reading device with finger motion triggering

A wearable indicia reader is worn on the back of a user's hand such that the act of pointing the user's index finger is sufficient to align the indicia reader and trigger the indicia-reading process. Triggering is achieved by sensing the user's finger in an image or by breaking a light path in a photogate.
Owner:HAND HELD PRODS

Antenna device and radio equipment having the same

An LC parallel resonance circuit is connected in series with the power supply side of the antenna conductor portion. The antenna conductor portion is configured so as to resonate at a frequency slightly lower than the center frequency in the higher frequency band of two frequency bands for transmitting and receiving radio waves. The LC parallel resonance circuit is configured so as to resonate substantially at the center frequency in the lower frequency band for transmitting and receiving a radio wave and be capable of providing to the antenna conductor portion a capacitance for causing the antenna conductor portion to resonate at the center frequency in the higher frequency band. Thus, a circuit for changing the upper and lower frequency bands is not needed. Such a change-over circuit, which is complicated, causes problems in that the conduction loss increases, and the antenna sensitivity deteriorates. Without need of the change-over circuit, the conduction loss can be reduced, the antenna sensitivity can be enhanced and costs can be reduced.
Owner:MURATA MFG CO LTD

Radar system and method of manufacturing same

A radar system (100) is described including a transmitting assembly (10), a receiving assembly (20), a control unit (30) and a signal processing unit (40). The transmitting assembly (10) receives an input signal (31) and transmits an incident radar signal (2). The transmitting assembly (10) includes a Rotman lens (12) having a lens cavity (74), a plurality of beam ports (60), a plurality of array ports (62) and a patch antenna assembly (14). The lens cavity (74) has a lens gap (h) between 10 microns to 120 microns, and preferably 40 microns to 60 microns. The patch antenna assembly (14) includes a plurality of antenna arrays (130) operable to receive a plurality of time-delayed, in-phase signals from the Rotman lens (12) and to transmit the incident radar signal (2) towards a target (4). The receiving assembly (20) receives a reflected radar signal (6) and produces an output signal. The signal processing unit (40) compares the input signal (31) to the output signal and implements an algorithm determining the range, velocity and position of the target (4).
Owner:UNIVERSITY OF WINDSOR

Antenna with a conductive layer and a two-band transmitter including the antenna

The antenna of said transmitter is a microstrip antenna. A rear edge of its patch is provided with a short circuit by means of which a quarter-wave primary resonance can be excited by a coplanar line formed by two coupling slots in an area. Separator slots separate said area from another area in which a secondary resonance can be established at twice the frequency of the primary resonance from a slotted line extending one slot of the coplanar line. The invention applies in particular to the production of a dual-mode mobile telephone to the GSM and DCS standards.
Owner:ALCATEL LUCENT SAS

Antenna with built-in filter

InactiveUS20060055601A1Isolation propertyHigh-performance antennaSimultaneous aerial operationsRadiating elements structural formsDielectricEngineering
A laminated dielectric block (3) is formed by laminating dielectric sheets (31) each having a conductive film formed on its one surface so as to constitute at least one filter (2). A radiation element (1) is provided so as to fix to the laminating dielectric block, wherein one electrode of the filter is electrically connected to the radiation element. The other electrode (22) of the filter is connected to a feeding terminal electrode (4) provided mounting face B (a face opposing to a circuit board) of the laminated dielectric block through a via-contact (33) and a wiring (34), not being exposed to the side face. As a result, an antenna with built-in filter of the structure where even if it is mounted on a circuit board, interference between an electronic circuit on the circuit board and the feeding terminal electrode of the antenna is prevented to improve the isolation characteristic and transmitting or receiving characteristic.
Owner:UBE IND LTD

Antenna device

A small antenna has two or more feeding ports. A radiator is made of a planar conductor having a substantially circular shape having the diameter of a substantially half wavelength or a substantially regularly polygonal shape where the length of a diagonal line passes through the center point is the substantially half wavelength. A ground plate is faced to the radiator. On the radiator, the feeding ports are connected to feeding points on two orthogonal line segments passing through the center of the radiator. This antenna is used as not only a single antenna but also two independent antennas having secured isolation between the feeding ports. A small antenna device used as two independent antennas is thus provided. The radiator is formed in a hat shape having an edge, has an Stepped Impedance Resonator (SIR) structure where the diameter of a crest part is a quarter wavelength, and is shortened.
Owner:PANASONIC CORP

Antenna using exterior metal frame and electronic device utilizing the same

An antenna device that uses an exterior metal frame is provided. The antenna includes a Printed Circuit Board (PCB); a plurality of segment-type exterior metal frames spaced apart from the PCB; a feeding portion connected to one metal frame of the plurality of segment-type exterior metal frames; and a slit located between the PCB and the one metal frame, wherein the one metal frame fed through the feeding portion operates with radiation, or the slit operates with radiator, or another exterior metal frame fed through the feeding portion operates with radiation.
Owner:SAMSUNG ELECTRONICS CO LTD
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