326 results about "Small antenna" patented technology

The invention discloses a lens antenna with high directivity intended for use in radio-relay communication systems, said antenna providing the capability of electronic steering of the main radiation pattern beam by switching between horn antenna elements placed on a plane focal surface of the lens. Electronic beam steering allows antenna to automatically adjust the beam direction during initial alignment of transmitting and receiving antennas and in case of small antenna orientation changes observed due to the influence of different reasons (wind, vibrations, compression and / or extension of portions of the supporting structures with the temperature changes, etc.). The technical result of the invention is the increase of the antenna directivity with simultaneously provided capability of scanning the beam in a continuous angle range and also the increase of the antenna radiation efficiency and, consequently, the increase of the lens antenna gain. This result is achieved by the implementation of horn antenna elements with optimized geometry.

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.

Printed circuit techniques and two-shot molding techniques are used to form a metal radiating element, a metal ground plane element, a metal antenna feed, a metal short-circuiting strip and metal capacitive loading plates within small antennas that are buried within transmit / receive radio-devices such a mobile cellular telephones. Balanced and unbalanced, single-feed, two and three band antennas are provided wherein the radiating element is laterally spaced from the ground plane element, to thereby provide an antenna having a very low profile or height, including antennas wherein the ground plane element and the radiating element are placed coplanar on the same surface of a PCB. A thin dielectric carriage on a PCB allows for the metal capacitive loading plates to be placed on the sidewalls of the dielectric carriage, to thereby provide reactive loading of a radiating element that is on the top surface of the dielectric carriage.

An intelligent billing statement contains conventional visible printed billing information and an electronic copy stored in an rfid chip incorporated into the billing statement sheet media. Information stored in the rfid chip can be read out via a small antenna coupled to the chip and a reader antenna coupled to a reader without opening the envelope containing the billing statement. Envelopes containing billing statements can be read and sorted by the carrier at high speed. The recipient can read several statements simultaneously with a reader having a display with an optional imminent due date indicator. The reader has an optional communication link to a personal computer used for automatic bill payments and other financial applications.

Some embodiments provide a relatively small antenna apparatus that acts as a passive repeater. The antenna apparatus can be designed to facilitate radio frequency (RF) signal gain for a collection or range of frequencies. In some embodiments, the antenna apparatus is placed near a device with a wireless receiver and / or transmitter, where the antenna apparatus causes increased RF signal intensity at the device by coupling RF signals from a proximate area of higher RF signal intensity into the area around the device. Accordingly, in some instances, an embodiment of the antenna apparatus can be used to increase the RF signal intensity in a null spot or dead spot by coupling RF signal energy from an area proximate to the null spot that has higher RF signal intensity.

A small antenna operating in multiple modes including three or more modes. There are provided an antenna that includes a ground conductor having a ground potential, a single feeding point whose one end is formed by a part of the ground conductor, and a plurality of transmission lines to which RF power supplied to the feeding point is input, the transmission lines each radiating electromagnetic waves of three frequencies of three modes into space. These transmission lines comprises a transmission line 41 that is connected to the feeding point at one end and to a branching point at the other end, a transmission line connected between branching points, and transmission lines connected to the branching points. The lengths of the respective transmission lines are set so that impedance matching is performed at the feeding point with respect to a plurality of frequencies. The antenna is formed from an integrated metal plate.

Apparatus and method for harvesting energy from the environment and / or other external sources and converting it to useful electrical energy. The harvester does not contain a permanent magnet or other local field source but instead relies on the earth's magnetic field of another source of a magnetic field that is external to the sensing device. One advantage of these new harvesters is that they can be made smaller and lighter than energy harvesters that contain a magnet and / or an inertial mass. A small implantable stimulator(s) includes at least one passive magnetostrictive / electro-active (PME) magnetic-field sensor for delivering electrical stimulation to surrounding tissue. The PME is charged utilizing a changing magnetic field from an external alternating magnetic field source at a frequency particular to the PME. The small stimulator provides means of stimulating a nerve, tissue or internal organ with direct electrical current, such as relatively low-level direct current for temporary or as needed therapy. The field source may be a hand-held device or a small antenna affixed to the wearer's skin, clothing or accessories. The stimulator may be configured to be small enough to be implanted through a surgical needle. Open- and closed-loop systems are disclosed with measurement of current flow and therapy through PME sensor function.

The broadband small antenna has equal magnetic electric proportions, circular polarization, and an isoimpedance magnetodielectric (μr≡εr) shell for controlled wave expansion. The shell is a radome without bandwidth limitation, with reflectionless boundary conditions to free space, providing loading and broad bandwidth antenna size miniaturization. The system is spherically structured based upon size, quality (Q) and bandwidth.

Lightweight, small antennas are described that have decreased material and fabrication / processing cost. The antennas may be used in consumer electronics products such as cellular phones, laptops and PDA's. Some of the antennas and fabrication techniques also provide lower part count and increased reliability. All antennas are fabricated with standard materials currently available in high volume production.

Systems and methods of satellite communications for moving terminals, including but not limited to on-the-move and mobile terminals (e.g., on-the-pause terminals), are implemented in certain embodiments using smaller antennas (e.g., aperture area with diameter less than 50 cm), open standard waveforms to secure availability from several suppliers, payment for service only when using the terminal, interference avoidance to adjacent satellites, and low cost. Low cost is achieved in part by operating at frequency bands that are currently operated by terrestrial microwave links so that existing low cost microwave components are utilized. The system also includes an interference elimination system that continuously monitors for interference to adjacent satellites from a user terminal's uplink signal. If interference is detected, the interference elimination system remedies the interference by performing one or more of the following: shutting down the interfering terminal(s), changing transmission parameters, changing the beam coverage on ground, changing the frequency of the affected traffic, or moving the satellite to a new orbital position. The interference elimination system may also transit the interference information to a control center.

A wireless communication apparatus having a metal housing is provided, in which an outside antenna is not required and a small antenna the sensitivity of which does not decrease is included. A slit 1 is provided on a metal housing 5 of a wireless communication apparatus and a feeder 2 is connected to a position approximately three-quarters of the long side of the slit 1 to be used as a ⅜λ slit antenna.

A planar small antenna and a small strip radiator are provided which have increased bandwidth. The small strip radiator has a main strip pattern and a plurality of convoluted strip patterns terminating the main strip pattern at each end. The plurality of convoluted strip patterns are arranged in mirror-symmetrical arrangement with reference to the longitudinal axis of the main strip such that one pair of convoluted strip patterns is convoluted clockwise while another pair is convoluted counterclockwise. As a result, an electrically small antenna radiator requires less metal or conductive material than conventional radiators, and also can operate without adversely affecting the radiation characteristics of the antenna.

The invention provides a full metal back shell antenna system, which comprises a metal back shell, a circuit board with main grounding points, and a main antenna module and a small antenna module electrically connected with the circuit board, wherein the metal back shell comprises a main body part, four side walls and two gaps; the two gaps cut the metal back shell into a first metal part, a second metal part and a third metal part which are insulated and separated mutually; the first metal part comprises a top gap; the second metal part comprises at least one bottom gap; the main antenna module comprises a matching circuit, a main feed point and at least one grounding point arranged on the circuit board; the small antenna module comprises at least one small antenna unit; and each small antenna unit comprises a feed point and at least one grounding point. Compared with the prior art, the full metal back shell antenna system can keep integrity of the metal back shell to the largest degree, and the appearance is attractive.

Embodiments of the invention relate to beamforming antennas such as can be used in space division multiplexing systems. Space division multiplexing can be used to increase data capacity in wireless networks by enabling different base stations to transmit signals within the same frequency band. Each antenna beam can potentially be used to establish a communication link within an area of wireless coverage, and other communication links established on other antenna beams then represent interference to that user. In order to reduce interference, narrow beamwidths are desirable. These are typically achieved by increasing the aperture of the antenna in the azimuth plane, and in arrangements that require finely divided angular sectors, a greater number of antennas will be required to give three hundred and sixty degree coverage. As a result, there is potentially a large increase in the total surface area of antennas which is undesirable, as it leads to increased wind loading of an antenna tower. Embodiments of the invention provide an arrangement in which data are transmitted from a first transmitter to a first receiver using a first antenna beam, and data are transmitted from a second transmitter to a second receiver using a second antenna beam. The first antenna beam is formed by splitting the signal from the first transmitter into two parts with a first phase relationship between the parts, each part being connected to an antenna. A second antenna beam is formed by splitting the signal from the second transmitter into two parts with a second phase relationship between the parts, each part being connected to one of the two antennas. An advantage of embodiments of the invention is that data can be transmitted from different transmitters at the same frequency without interference, while presenting a smaller antenna aperture than is required with conventional systems.

The size of a wireless chip is often determined according to an antenna circuit thereof. Power source voltage or power supplied to the wireless chip can be more easily received with a larger antenna. On the other hand, there has been an increasing demand for a compact wireless chip, and it is thus necessary to downsize an antenna. In view of this, the invention provides a wireless chip capable of data communication with a small antenna, namely a compact wireless chip having an improved communicable distance. A power source circuit of an ID chip of the invention generates a higher power source voltage than a power source voltage generated in a conventional ID chip, by using a boosting power source circuit having a boosting circuit and a rectifier circuit.

An antenna arrangement, a system, and method are provided for implementing a wireless communication module capable of performing adaptive beam forming, with a small antenna sail area. The antenna has a large horizontal to vertical aspect ratio. The antenna module is designed to include very few, or potentially a single radiating element in the vertical direction, and many elements in the horizontal direction, in order to create narrow beam in the azimuth plane, while maintaining a small sail area. The novel form factor advantageously provides for reduced wind loading, and for less conspicuous installations on buildings or towers, for example. The module is anticipated to find widespread applications in LOS and NLOS backhaul applications, and other wireless links between stationary nodes.

Printed circuit techniques and two-shot molding techniques are used to form a metal radiating element, a metal ground plane element, a metal antenna feed, a metal short-circuiting strip and metal capacitive loading plates within small antennas that are buried within transmit / receive radio-devices such a mobile cellular telephones. Balanced and unbalanced, single-feed, two and three band antennas are provided wherein the radiating element is laterally spaced from the ground plane element, to thereby provide an antenna having a very low profile or height, including antennas wherein the ground plane element and the radiating element are placed coplanar on the same surface of a PCB. A thin dielectric carriage on a PCB allows for the metal capacitive loading plates to be placed on the sidewalls of the dielectric carriage, to thereby provide reactive loading of a radiating element that is on the top surface of the dielectric carriage.

A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read / write head using optical-laser generated surface plasmons in a small antenna to locally heat a magnetic medium, uses the same optical laser at low power to pre-heat the antenna. Maintaining the antenna at this pre-heated temperature, approximately 50% of its highest temperature during write operations, allows the DFH mechanism sufficient time to compensate for the thermal protrusion of the antenna at that lower temperature, so that thermal protrusion transients are significantly reduced when a writing operation occurs and full laser power is applied. The time constant for antenna protrusion is less than the time constant for DFH fly height compensation, so, without pre-heating, the thermal protrusion of the antenna due to absorption of optical radiation cannot be compensated by the DFH effect.

A tablet PTP package contains a multiplicity of tablets by a resin PVC and a metal sheet such as an aluminum sheet. An elongate space pattern is formed in a part of the aluminum sheet on the lower surface of the package to form an island area constituting an antenna. A small radio IC inlet including an IC chip mounted on a small antenna is arranged on the reverse surface (upper surface of the package) of the portion of the aluminum sheet corresponding to the island area. The small radio IC inlet and the second antenna formed by the island area are electrostatically coupled to each other with the resin PVC as a dielectric member, and thus a RFID (radio frequency identification) tag is configured.

A small antenna duplexer that includes antenna terminal, first filter electrically connected to this antenna terminal and passing a first frequency band, second filter electrically connected to antenna terminal and passing a second frequency band, and third filter electrically connected to antenna terminal and passing a third frequency band. First filter and third filter are used for one band, and second filter and third filter are used for another band.

A small antenna system for communications on-the-move (“COTM”) with a geostationary or geosynchronous satellite to and from a land mobile, maritime or airborne vehicle is disclosed. The antenna system provides a robust and simple means of establishing communications with a satellite or remote computer device. Further embodiments of systems and methods of the various aspects of the present invention mitigate RF losses customary in existing horn antennas. Embodiments also facilitate COTM by utilizing novel antenna configurations that tightly integrate RF electronics while dissipating generated heat via an antenna compartment that may be designed to function as or be used in conjunction with a heat sink.

Methods are provided for producing large volumes of small antenna arrays. In one embodiment, the method comprises the steps of creating an antenna array pattern as a computer file, printing the created pattern onto the surface of a suitable transfer paper, placing the printed image surface in contact with the surface of a material to be etched, and transferring the printed image to the surface of the material to be etched. The transfer can be effected by any combination of chemicals, heat, and / or pressure. After transfer of the printed image, the transfer paper is removed. The step of removing the transfer paper optionally includes wetting the transfer paper in a manner that dissolves the transfer paper leaving the printed antenna pattern on the surface of the material to be etched. The method further includes the step of etching the non-printed portions of the material, preferably by chemical etching, and removing the printed pattern from the surface of the material to yield an antenna array comprising a non-etched portion of the substrate surface. Arrays, and substrates having an etch-resistant mask for making the arrays, are also provided.

A wireless communication apparatus having a metal housing is provided, in which an outside antenna is not required and a small antenna the sensitivity of which does not decrease is included.A slit 1 is provided on a metal housing 5 of a wireless communication apparatus and a feeder 2 is connected to a position approximately three-quarters of the long side of the slit 1 to be used as a ⅜λ slit antenna.

The invention aims at overcoming the defects of an existing micro-strip patch antenna in the aspects of the high gain, the wide band and the circular polarization and providing a laminated circular polarization micro-strip patch antenna based on the LTCC technology. The antenna comprises an upper radiation metal patch antenna array layer, a lower radiation metal patch antenna array layer, an upper dielectric substrate layer, a lower dielectric substrate layer, a feed network, a grounding metal layer and a coaxial connector probe. The antenna is characterized in that the upper radiation metal patch antenna array layer and the lower radiation metal patch antenna array layer are the same in shape and size, each antenna array is composed of four small antenna arrays, each small antenna array is composed of four sub-arrays, each sub-array is composed of four radiation metal patches, each radiation metal patch is a square with a chamfer, and a set of opposite sides of each radiation metal patch are provided with rectangular gaps. The antenna can better meet the requirements for performance of the high gain, the wide band and the circular polarization of the micro-strip patch antenna, and the structure is simple.

A small antenna device having an increased gain is provided. The antenna device includes a multilayer dielectric substrate composed of a combination of a plurality of dielectric layers, wherein a feeding antenna is provided in a lower layer of the multilayer substrate, a reflective metal plate is provided above the feeding antenna, and circular or rectangular metal loops are arranged so as to be of increasing diameter from lower layers toward upper layers in the plurality of dielectric layers. There is provided a small-size antenna device having a high gain. The antenna device is formed by a multi-layer dielectric substrate combining a plurality of dielectric layers. A feeding antenna is arranged at the lower layer of the multi-layer substrate. A reflection metal plate is arranged above the feeding antenna. Furthermore, disc-shaped or square loop-shaped metal members are arranged with a diameter increasing from the lower layer toward the upper layer.

The invention relates to a sensor suitable for passive wireless measurement of torque. The sensor has temperature and vibration compensation functions. The passive wireless torque sensor of the present invention includes four surface acoustic wave resonators with different center frequencies, a small antenna and an elastic shaft of the sensor. The surface acoustic wave resonator of this sensor uses quartz as the substrate of the resonator. The interdigital transducer and reflection grid are deposited on the substrate, and the piezoelectric effect and inverse piezoelectric effect are used to excite and receive the surface acoustic wave. The four surface acoustic wave resonators of the torque sensor are pasted on the elastic shaft according to the design angle. When torque is applied to the elastic shaft, the four surface acoustic wave resonators can respectively detect the deformation in the pasting direction. The four deformations can be obtained by processing the temperature , Torque information after vibration compensation. The four surface acoustic wave resonators are connected with the antenna, which can realize the wireless transmission of force state information. The invention has the advantages of simple structure, small size, light weight, high precision, passive wireless, and is suitable for passive wireless measurement of torque of important shaft parts such as aerospace, transmission machinery, precision machine tools, and heavy vehicles.

The invention discloses an antenna module and electronic equipment. The antenna module comprises an insulating shell, a metal frame, a feed point, multiple electric connecting pieces, multiple adjustable assemblies and a first connecting section, wherein each electric connecting piece is grounded through the corresponding adjustable assembly; the feed point reaches a first connecting point through a second connecting point, and the feed point and at least two electric connecting pieces which are electrically connected to the first connecting point reach a second end through the first connecting point, so that an IFA antenna is formed; the feed point reaches the at least two electric connecting pieces which are electrically connected to a third connecting point through the second connecting point and a gap between the first end and a second frame body, so that an annular antenna is formed; and the feed point and the first connecting section form a monopole antenna. By adoption of the technical scheme of the antenna module and the electronic equipment, it is ensured that wide frequency band communication can be realized through relatively small antenna structure, so that the requirement on the smaller and smaller dimensions of the antenna can be more satisfied.

An antenna circuit includes a plurality of antenna circuit units on a circuit substrate. The plurality of antenna circuit units includes: a large antenna circuit unit whose circuit size is large; and a small antenna circuit unit whose circuit size is smaller than the size of the large antenna circuit unit, the small antenna circuit unit provided inside the large antenna circuit unit and provided detachable from the large antenna circuit unit.