135results about "Logperiodic antennas" patented technology

A helix antenna and methods of making and using helix antenna to concurrently or independently radiate pulses in a very high frequency (VHF) band in a range of about 240 MHz to about 270 MHz and / or in an ultrahigh frequency (UHF) band in a range of about 360 MHz to about 380 MHz which can be useful in space to ground data transmissions, subsurface radar, and measurement of ice and snow pack.

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.

The present invention discloses a gradient voltage-excited miniature ultra-wideband directional antenna comprising eight arrays and a logarithmic periodic silicon-based support structure. The arrays are directly bonded to the logarithmic periodic silicon-based support structure, forming periodically arranged array pairs. Each array is directly fed by a voltage source, and each array pair generates strong resonance, enhancing the frequency of the corresponding array and increasing the antenna gain. Eight arrays are bonded above the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern. Eight arrays are bonded below the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern, and the eight arrays are aligned above and below. The present invention utilizes gradient voltage excitation, breaking through the inherent relationship between antenna wavelength and antenna size. This achieves miniaturization while providing extremely wideband coverage from very low frequencies to millimeter waves and enhancing antenna gain.

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.

An antenna 10 comprises a single wire wound in a helix 12 comprising a plurality of turns 1, 2, 3, n, n+1,... p around a main axis 11 with immediately adjacent turns having an inter-turn spacing between them. The helix has a back end 14 and a front end 16 and the main axis defines a main beam direction. A transverse crosssectional area of the helix monotonously decreases from the back end 14 to the front end 16. The inter-turn spacing S1... Sn... monotonously decreases from the backend 14 to the front end 16. A feed-point 13 is provided at the back end 14.

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 radio frequency device is characterized in that the radio frequency device is provided with a spiral antenna and a radio frequency module, and the first end of the spiral antenna is electrically connected with a radio frequency interface of the radio frequency module; the spiral antenna structurally comprises a core material and a spiral conductor wound and fixed on the periphery of the core material. The spiral conductor is made of a single or a plurality of bundled metallized fibers, metal wires or carbon fiber wires, and the radius of each metallized fiber, metal wire or carbon fiber wire is 1t; the frequency of the radio-frequency signal is five times of the skin depth when the radio-frequency signal is transmitted on the metallized fiber, the metal wire or the carbon fiber wire; the helical antenna has an extremely high quality factor, so that a communication distance which is several times of that of a traditional helical antenna is obtained under the same power.

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 application relates to a retractable joint for an antenna and belongs to the technical field of antennas. The application comprises a middle support and two connecting supports, the two ends of the middle support are connected with the corresponding connecting supports through bearings; each connecting support is provided with upper and lower groups of spring connecting heads, the two upper groups of spring connecting heads opposite to each other are connected through SMA spring a, the two lower groups of spring connecting heads opposite to each other are connected through SMA spring b, and the SMA spring a and the SMA spring b are located above and below the middle support respectively. The novel shape memory alloy material is used for retraction, and the logarithmic-periodic antenna is more compact and portable.

The application discloses a log-periodic antenna linear array design method considering grating lobe suppression, and comprises the following steps: acquiring a first direction function of a main lobe direction of a uniform linear array composed of a plurality of point source antenna units changing with a feed phase; acquiring a second direction function of a main lobe direction of the uniform linear array composed of a plurality of antenna units under the influence of a beam width of the antenna units; constructing a normalized direction function of the linear array according to the first direction function and the second direction function; obtaining antenna array direction patterns under different intervals of the antenna units according to the normalized direction function by controlling the intervals between the antenna units, so as to acquire an interval range of the antenna units without grating lobes; and constructing a linear array of a plurality of linearly arranged antenna units according to the interval range. The method can solve the problem that the traditional antenna array uses the mode of changing the intervals, feed amplitudes and phases of the antenna units to control the side lobe level, thereby increasing the complexity and cost of the feed.

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.

A multi-band antenna has a feed point, a grounding location, a first portion for low band operation, a second portion for low band operation, and one or more portions for high band operation. The ground reference of the feed point for the multi-band antenna is connected to a separate object that may provide a base for the multi-band antenna. The feed point of the multi-band antenna may be spaced above the base and have a space between the feed point and a location for the ground point. The low band portion has multiple resonances that are often odd multiples of the lowest resonant response. The portions that resonant most dominantly in the high band often have multiple resonances that are even multiples of the lowest high band resonance. The multi-band antenna has resonances spaced closely enough to appear to be a wide band antenna above the fundamental high band resonance.

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 the technical field of wireless communication, and particularly discloses a four-arm helical antenna. The antenna comprises a metal floor, a supporting medium and a radiation assembly which are sequentially arranged, wherein the radiation assembly is innovatively combined by a spiral arm structure and a top loading patch. The spiral arm is integrated on the surface of the supporting medium in a precise winding mode, the top end loading patches are printed on the upper surface and the lower surface of the circular medium substrate through a double-face copper-clad structure, and electrical connection is innovatively achieved through a three-dimensional interconnection structure. Four sets of metalized through holes in the outer side complete coupling connection of the patches and the spiral arm. The two groups of metalized through holes on the inner side are connected with an outer conductor of a coaxial feeder line, and the central metalized through hole is directly communicated with an inner conductor of the feeder line. According to the antenna, through unique spatial layout and impedance matching design, a complex feed network is not needed, the matching characteristic is good, the low-elevation radiation characteristic is good, the azimuth plane has the omnidirectional radiation characteristic, and the antenna is suitable for wireless systems needing full-space coverage such as satellite communication and navigation positioning.

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.

Method and machine to assemble a transponder (9) provided with a helical antenna (11) in a component (1) of an article. The following are provided: a main conveyor (15) which is designed to move, along an assembling path (P) a carriage (16) carrying at least one seat (18) designed to house the component (1); an input station (S1), which is arranged along the assembling path (P) and is configured to place the component (1) in the seat (18) of the carriage (16); a feeding station (S4), which is arranged along the assembling path (P) downstream of the input station (SI) and is configured to couple an integrated circuit (10) provided to two electrical contacts (12) to the component (1); a winding station (S5), which is arranged along the assembling path (P) downstream of the feeding station (S4) and is configured to wind an externally insulated conductor wire (13) around the component (1) in order to obtain a series of turns making up the helical antenna (11); and a welding station (S6), which is arranged along the assembling path (P) downstream of the winding station (S5) and is configured to weld two opposite ends of the helical antenna (11) against the two electrical contacts (12) of the integrated circuit (10).