65results about "Logperiodic antennas" patented technology

This application provides an antenna, antenna array, and communication device, aiming to construct more degrees of freedom and antenna ports within a limited antenna panel size. The antenna includes: four independent feed points; and four helical arms corresponding one-to-one with the four feed points, each helical arm connected to its corresponding feed point. The helical end of each helical arm can be connected to its corresponding feed point using an open-circuit stub structure, and / or, the end of each helical arm can be coupled to a parasitic patch, and / or, the spacing w between two adjacent helical arms satisfies: w ≤ λ / 10, where λ is the operating wavelength. This design provides four degrees of freedom and widens the antenna bandwidth. Within the limited antenna panel size, this is beneficial for improving system throughput.

Single band and multiband wireless antennas are an important element of wireless systems. Competing tradeoffs of overall footprint, performance aspects such as impedance matching and cost require not only consideration but become significant when multiple antenna elements are employed within a single antenna such as to obtain circular polarization transmit and / or receive. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact single or multiple frequency band antennas which, in addition to providing the controlled radiation pattern and circular polarization purity (where required) are impedance matched without substantially increasing the footprint of the antenna and / or the complexity of the microwave / RF circuit interfaced to them, whilst supporting multiple signals to / from multiple antenna elements in antennas employing them. Solutions present achieve this through provisioning one or more capacitive series reactances discretely or in combination with one or more shunt capacitive reactances.

An antenna apparatus and method of operating the antenna apparatus, can include a helical antenna comprising a helical portion raised from a printed circuit board to optimize gain and bandwidth, wherein the helical portion incorporates a limited number of turns, which facilitate control over the dimensions of the helical antenna. An antenna support can be provided, which can maintain dimensional consistency with respect to the helical antenna. The antenna support can facilitate achievement of target performance parameters for the antenna apparatus. In addition, the elevated helical portion can be configured to enhance the gain and the bandwidth without compromising the overall dimensions of the helical antenna. In some embodiments, the helical antenna may be formed from plastic.

Transmitters, receivers, transceivers, transport networks, and methods of use are described herein, including a transmitter comprising a client-side input, transmitter circuitry, and antennas. The client-side input receives baseband signals having client data encoded therein. The transmitter circuitry receives the baseband signals from the client-side input and generates antenna feed signals based on the baseband signals. The antennas receive the antenna feed signals from the transmitter circuitry, generate radiated signals based on the antenna feed signals, and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection and having one or more frequencies in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz). The antennas include one of a helical antenna, a waveguide probe antenna, a tapered antenna, a patch antenna, and a slot antenna.

The application discloses a circularly polarized logarithmic-periodic antenna based on rotation of radiating oscillators, and belongs to the technical field of antenna engineering, and aims at solving the problem of how to design a circularly polarized logarithmic-periodic antenna with wide bandwidth, low profile and simple structure. The application forms corresponding circularly polarized characteristics by rotating a plurality of groups of radiating oscillators by a certain angle with parallel assembly lines as the shaft. The antenna only has a plurality of radiating oscillators which change according to the logarithmic-periodic antenna rule, and does not have a main oscillator and a sub-oscillator, so that the structure is simpler and easier to realize. Meanwhile, the circularly polarized effect is formed by rotating the radiating oscillators to a certain phase and the phase difference between the electromagnetic waves of each oscillator and the zero point of the antenna, so that the logarithmic-periodic antenna can obtain good impedance bandwidth and 3dB axial ratio bandwidth in the working frequency band.

The present invention relates to a radio frequency identification tag to be embedded into a tire, and according to one embodiment of the present invention, the radio frequency identification tag to be embedded into a tire is technically characterized by comprising: a PCB substrate having a prescribed length; an antenna having a predetermined length, formed in a spiral shape, and fitted along the longitudinal direction of the PCB substrate; and a radio frequency identification (RFID) chip which is provided in the central portion of the PCB substrate and which wirelessly receives data from the antenna, the PCB substrate and the antenna being spaced apart from each other by a predetermined distance as the front / rear width of the interior of the antenna formed by the spiral shape is larger than the front / rear width of the PCB substrate, and the PCB substrate and the antenna forming a space portion, the space portion being spaced apart from each other by a predetermined distance. And a part of the antenna is arranged in the protective cover, so that the interval between the radio frequency identification chip and the antenna is kept constant.

The extended logarithmic spiral antenna structure includes a first conductive layer, a dielectric layer, and a second conductive layer. The first conductive layer includes a first spiral arm and a plurality of second spiral arms. The first spiral arm has a first initial radius. The second spiral arms are disposed around and connected to the first spiral arm, and each of the second spiral arms has a second initial radius. The dielectric layer has an upper surface and a lower surface, and the upper surface is connected to the first conductive layer. The second conductive layer is connected to the lower surface. The second initial radii of the second spiral arms are different from each other and from the first initial radius.

To provide a system and method that allows more antennas to be present on a spacecraft while minimizing the platform volume used for antennas. [Solution] The multiband concentric helical antenna system 100 includes bases 115, 125, a first helical antenna 110, and at least a second helical antenna 120, wherein the second helical antenna is located within the first helical antenna, the first helical antenna has a first frequency band, and the second helical antenna has a second frequency band that is not the same as the first frequency band, and the first and second helical antennas are connected to the base and located within an opening in the base. The multiband helical antenna system may further include N additional antennas, which can be used as a single radiating element or in an array of radiating elements.

The present disclosure relates to an attachable wireless identification tag for a tire, the attachable wireless identification tag for a tire according to the embodiment of the present disclosure is technically characterized by including a PCB including a main body part, and antenna installation parts extending from two opposite sides of the main body part, an RFID chip installed on the main body part, and an antenna having a predetermined length, formed in a helical shape, and fitted and coupled in a longitudinal direction of the installation part, in which antenna a forward / rearward width of an interior defined by the helical shape of the antenna is larger than a forward / rearward width of the PCB, such that the antenna installation part and the antenna are spaced apart from each other at a predetermined interval to form a space portion.

The present invention relates to a wireless RFID tag to be embedded in a tire. The wireless RFID tag to be embedded in a tire, according to one embodiment of the present invention, comprises: a PCB having a predetermined length; an antenna which has a predetermined length and which is formed in a helical shape so as to be fitted and coupled along the longitudinal direction of the PCB; and an RFID chip provided in the central portion of the PCB so as to wirelessly receive data from the antenna, and is technically characterized in that the inner front-rear width constituting the helical shape of the antenna is larger than the front-rear width of the PCB, and thus the PCB and the antenna are spaced a predetermined distance apart from each other, thereby forming a space part, and a portion of the antenna is inserted into a protective cap so as to maintain a constant distance between the RFID chip and the antenna.

It can sometimes be difficult to suppress the constraints required for antennas that emit electromagnetic waves in response to high-voltage pulses. [Solution] The antenna has an outer conductor which is an electrically conductive conductor and an inner conductor which is an electrically conductive conductor formed inside the outer conductor, and the outer conductor and the inner conductor are arranged to form a gap portion which functions as a gap switch.

The present disclosure provides a helical antenna. The helical antenna includes a feeder board and four radiation components. The four radiation components are electrically coupled with the feeder board, respectively. A dielectric space is formed among the feeder board and the four radiation components. The four radiation components are circularly arranged at intervals, and any cross-section of the four radiation components parallel to a top surface of the feeder board is circular. Each of the four radiation components includes a feeding unit and a radiation portion. The feeding unit is electrically coupled between the radiation portion and the feeder board. The radiation portion is configured to transmit and receive a wireless signal in a first frequency band. An end of the radiation portion is in connection with the short circuit portion, and the other end of the radiation portion is in connection with the feeding portion.

The invention relates to a method (500) for the low-frequency, in-flight calibration of a direction-finding device comprising an antenna array, mounted on an aerial carrier. The method (500) comprises, for a given angular reception position, a calibration step (502) of the airborne direction-finding device at a given frequency, comprising the following operations: - transmission (504), by a calibration transmitter, at the given frequency and in the direction of the direction-finding device, of at least two calibration signals with mutually orthogonal polarizations, and - measurement (506) of the response of the antenna array for each of the signals. It also relates to a system implementing such a method.

The invention belongs to the technical field of antennas, and particularly relates to a hybrid beam switching antenna for long and narrow space communication and a control method and device, and the antenna comprises a central phased array unit which is used for achieving beam scanning within the range of + / -53 degrees and comprises a first dielectric substrate, a coaxial feed probe and a rectangular radiation patch; 1 * N linearly arranged rectangular radiation patches are equidistantly arranged on the top surface of the first dielectric substrate along the length direction, N is greater than or equal to 8 and is a positive integer, each rectangular radiation patch feeds through two coaxial feed probes which are vertically arranged, and the two coaxial feed probes are symmetrically arranged about the central axis of the rectangular radiation patch along the width direction; and 180-degree phase difference switching and the like are realized. The ultra-wide-angle low-side-lobe high-speed switching device is applied to the special requirements of communication in long and narrow spaces (such as corridors, tunnels and building channels), and has the positive effects of ultra-wide-angle coverage, low side lobe, quick switching and low cost.

An antenna system comprises a substrate, an antenna positioned on the substrate, and a circuit component positioned on the substrate. The antenna is positioned on a first surface of the substrate and operable to emit a radiation pattern. The circuit component is positioned on the substrate in a null region of the radiation pattern. The thickness of portions of the substrate are modified to achieve a desired performance characteristic of the antenna.

The invention provides a helical antenna device and a signal tracking method thereof, and the helical antenna device comprises a pedestal; the supporting rod is arranged on the base in a rotatable manner; the helical antenna is wound on the supporting rod, one end of the helical antenna is connected with the supporting rod, and the other end of the helical antenna is connected with the base; the spiral coil number and the spiral diameter of the spiral antenna can be changed along with rotation of the supporting rod. The device can change the spiral coil number and the spiral diameter of the spiral antenna by rotating the supporting rod so as to change the directional diagram of the spiral antenna, and is used for tracking the transit pitch angle of the aircraft, so that the maximum gain radiation direction of the spiral antenna can always point to the transit pitch angle of the aircraft; and the communication link quality between the helical antenna and the aircraft is ensured.

The present disclosure provides a log periodic antenna, and belongs to the technical field of communications. The log periodic antenna of the present disclosure includes a feed assembly and N radiation structures; where the radiation structures are electrically connected to the feed assembly at M connection nodes, respectively; where N≥3, and M≥3. Distances between the M connection nodes satisfy a periodic variation.

The invention relates to the technical field of antenna devices, and particularly discloses a high-temperature-resistant Archimedes spiral detecting and receiving antenna which comprises an antenna pattern layer, a dielectric substrate and a feed balun. The antenna pattern layer is an Archimedes spiral detection antenna layer based on a high-temperature anti-oxidation metal conductor coating, the dielectric substrate is an oxide ceramic material dielectric substrate, the antenna pattern layer is coated on the upper surface of the dielectric substrate, and a feed hole is formed in the center of the dielectric substrate; the feed balun comprises an oxide ceramic material insertion piece and a high-temperature anti-oxidation feed pattern layer, and the front surface and the back surface of the insertion piece are coated with the feed pattern layer. The high-temperature-resistant Archimedes spiral detection antenna has the advantages of high temperature resistance and oxidation resistance, stable feeding of the Archimedes spiral detection antenna at high temperature can be realized, and the defect problems of high-temperature oxidation of a metal antenna pattern and high-temperature ablation damage of an organic dielectric medium in a traditional metal antenna pattern / organic dielectric medium detection antenna scheme are solved.

An antenna support structure is disclosed. The antenna support structure includes a first planar member and a second planar member wherein the first planar member is configured to orthogonally engage with the second planar member. Each of the first and second planar members have a corresponding slot to achieve said orthogonal engagement. Both the first and second planar members each include a plurality of apertures arranged in such a manner to correctly and rigidly hold a plurality of helical radiating elements in a desired position.An antenna system is disclosed. The antenna system includes the antenna support structure having a plurality of helical radiating elements extending through the antenna support structure. The antenna support structure and the plurality of helical radiating elements are each electrically coupled to a printed circuit.

A radio frequency device is characterized by having a spiral antenna and a radio frequency module, a first end of the spiral antenna is electrically connected with a radio frequency interface of the radio frequency module; the structure of the spiral antenna comprises a core material and a spiral conductor wound and fixed on the outer periphery of the core material; the material of the spiral conductor is single or multiple bundled metalized fibers or metal wires or carbon fiber wires, and the radius of each metalized fiber, metal wire or carbon fiber wire is less than 5 times of the skin depth when the radio frequency signal frequency is transmitted on the metalized fiber, metal wire or carbon fiber wire; the spiral antenna has an extremely high quality factor, thereby obtaining several times of communication distance compared with traditional spiral antenna under the same power.

Global navigation satellite systems (GNSS) employ a network of geo-spatially positioned satellites to broadcast precisely synchronized navigation messages, thereby providing for determination of a network time and a geolocation by dedicated GNSS receivers. However, such GNSS antennas are susceptible to interference incident along the direction of the horizon. Reducing antenna susceptibility is typically achieved by implementing an antenna with reduced or null gain at low elevations. However, such designs are narrowband whilst GNSS antennas should operate broadband, e.g. on multiple GNSS bands. Accordingly, broadband antenna designs with reduced or null gain at low elevations are provided.

Techniques pertaining to designs of a helical antenna as a coupler for dielectric waveguides for high data rate communications are described. A coupler to a waveguide cable is configured to allow the waveguide cable to connect to an integrated circuit (IC) chip in a direction normal to the IC chip. The coupler includes a helical antenna which includes a core, a helical structure in the core, and a cladding surrounding the core.

The application relates to a metalized high-power logarithmic periodic antenna unit and array, and belongs to the technical field of microwave antennas. The antenna unit comprises a feeding coaxial probe, a feeding connection copper block, a metal feeding line and a metal logarithmic periodic dipole structure; the antenna as a whole adopts a full-metal structure without a dielectric plate, and the feeding mode adopts the metal feeding line taking air as the medium, so that the heat dissipation capacity and power capacity of the antenna are improved; the lengths of the antenna dipoles gradually increase from high to low, the dipole arms are folded inwards by 45 degrees with the set line as the central axis in the vertical plane, finally all the dipoles are located on two mutually perpendicular planes, and on the basis of the bottom several groups of dipole arms, the dipole arms are further bent by 90 degrees twice in the vertical direction to form C-shaped dipole arms; the structure effectively reduces the transverse size of the antenna unit, the coupling current between the array elements in the antenna array can be utilized to expand the antenna bandwidth to the low frequency. The application has the advantages of large antenna power capacity, small antenna unit and the like.

The invention provides an ultra-wideband linear polarization feed source antenna. The ultra-wideband linear polarization feed source antenna comprises a bottom plate and an antenna assembly arranged above the bottom plate, wherein the antenna assembly comprises a feed coaxial line and two log-periodic antennas, and the two log-periodic antennas are arranged on the two sides of the feed coaxial line respectively; and the two log-periodic antennas are connected in parallel through the feed coaxial line. The problems that in an existing UWB wireless communication system, the impedance coefficient and the gain value of an ultra wide band antenna are unstable, and the beam width of the H face and the beam width of the E face are greatly different can be solved.

An antenna module for a vehicle is provided. The module comprises a primary cell antenna, a secondary cell antenna and an AM / FM / DAB antenna. The AM / FM / DAB antenna comprises (i) horizontal metal windings around a horizontal PCB, (ii) vertical metal windings around a vertical PCB and (iii) a metal sheet part. The metal sheet part is arranged parallelly to the horizontal PCB. The secondary cell antenna is a metal sheet antenna, comprising a vertical part and a horizontal part. The horizontal part is arranged parallelly to the horizontal PCB and partly extends above the metal sheet part of said AM / FM / DAB antenna. The primary cell antenna is a metal sheet antenna, mechanically and electrically connected to another side of the horizontal PCB.

An array lattice for a low-density array includes a plurality of antenna elements. Each pair of the plurality of antenna elements are spaced such that each pair of the plurality of antenna elements have different spacing. Furthermore, each pair of the plurality of antenna elements has a grating lobe steered to a different angle while a main beam is the only beam that is coherently combined by each pair of the plurality of antenna elements. The array lattice results in grating lobe rejection that is directly proportional to the number of antenna elements.

The present invention relates to a log-periodic antenna (10) comprising a boom (12) extending in a plane along an elongation axis (E), the boom (12) carrying successive radiating elements (14) arranged along the elongation axis (E), the radiating elements (14) extending along an elevation axis (Z), in which, on at least one portion of the boom (12), the quotient of the distance separating a radiating element (14) from an immediately succeeding radiating element (14) by the distance separating the radiating element (14) from the immediately preceding radiating element (14), is constant, characterised in that at least a plurality of successive radiating elements (14) are arranged alternately on either side of a plane defined by the elongation axis (E) and the elevation axis (Z) and at a non-zero distance from this plane.