178results 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.

The invention discloses an ultra-wide beam broadband four-arm helical antenna based on parasitic loading. The ultra-wide beam broadband four-arm helical antenna comprises a circular dielectric substrate, an arc parasitic radiation arm, a cylindrical support, a flexible dielectric substrate, a stepped impedance winding helical arm, a floor and a coaxial feed. The antenna can realize wide axial ratio beam width and wide half-power beam width in a working frequency band range of 2-2.5 GHz, meanwhile, the antenna has a relatively small size, the stability, the anti-interference capability and the coverage range of a wireless communication system are improved, and the antenna can flexibly cope with various complex scenes. In addition, the antenna works in a wide frequency band and has a wide 3-dB axial ratio beam width in the wide frequency band, for example, the 3-dB axial ratio beam width at a 2.2 GHz frequency point reaches 235 degrees; the 3-dB axial ratio beam width at the 2.3 GHz frequency point reaches 252 degrees; and the 3-dB axial ratio beam width at a 2.4 GHz frequency point reaches 236 degrees.

The invention belongs to the technical field of antennas, and relates to a circularly polarized antenna array, which comprises four antennas distributed in an array, the antenna comprises a first radiation layer, a first dielectric layer, a second radiation layer, a second dielectric layer and a floor layer which are sequentially stacked from top to bottom, the first radiation layer comprises two spiral radiation arms which are arranged at an interval and are distributed in a central symmetry manner so as to form a circularly polarized spiral antenna; the second radiation layer and the first radiation layer are connected and have the same structure; the first radiation layer and the second radiation layer are connected with the feed structure; the radiation arms comprise a first radiation arm and a second radiation arm; the initial ends of the first radiation arm and the second radiation arm are arranged in the middle of the first dielectric layer, the terminal of the first radiation arm is arranged in the middle of the antenna array, and the terminal of the second radiation arm is arranged at the corner of the antenna array. According to the invention, ultra wide band, high gain, circular polarization and interference resistance can be realized at the same time, the axial ratio performance is good, and miniaturization is facilitated.

The invention provides a high-gain broadband antenna based on a resonant ring and lens structure. A main body part of the antenna comprises a bow-tie dipole broadband log-periodic antenna fed by a parallel strip-shaped microstrip line, a lens, a resonant ring, a supporting back plate and a supporting arm. And the lens structure is formed by processing a Teflon material. The top of the parallel strip-shaped microstrip line feed bow tie dipole broadband log-periodic antenna body part is composed of a microstrip line and three bow tie elements with different sizes, and the bottom of the parallel strip-shaped microstrip line feed bow tie dipole broadband log-periodic antenna body part is composed of three bow tie elements which are transited to the microstrip line and have the same size with the top but are symmetrical in direction, wherein the plane conical shape is symmetrical to a quarter circle. The SMA interface on the back is embedded in the center of the supporting backboard, the lens is located at the end-to-end of the feed source antenna, the structure of the lens is composed of a semi-sphere on the top and two cylinders with different radiuses at the bottom of the middle, and the lens is connected with the supporting backboard through the supporting arm. And the resonant ring is located at the tail end of the log-periodic antenna structure. The working frequency band of the antenna ranges from 7.18 GHz to 12.55 GHz, the gain in the frequency range ranges from 11.1 dBi to 16.0 dBi, and the gain is the highest when the frequency is 10.0 GHz. The antenna has the advantages of simple structure, low cost, wide band, high gain and the like.

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 RFID transponder (1) comprising a radiating antenna (2) and a pod (3), a pod (3), and a method of manufacturing a panel (29) including the pod (3) are disclosed.

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 present application discloses a smart glasses, belonging to the technical field of smart terminals. The smart glasses include: a frame and temple arms, the frame is connected to the temple arms; an antenna unit is arranged on the temple arms, the antenna unit includes a first antenna radiator and a first antenna feeding structure, the first antenna radiator is a spiral structure, one end of the first antenna radiator is connected to the first antenna feeding structure, and the other end of the first antenna radiator is connected to the frame; wherein, the smart glasses can be switched between a wearing state and a folded state, and when the smart glasses are in different states, the first antenna radiator undergoes elastic deformation, and the radiation direction of the first antenna radiator relative to the frame remains unchanged.

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.

A deployable antenna system for deployment in an extraterrestrial environment is provided, the deployable antenna system comprising a deployment mechanism including one or more extendable support structures comprising at least one axial support structure adapted to extend in a z-direction parallel to a z-axis in the deployable antenna system and a deployable antenna attached to the one or more extendable support structures and adapted to be stowed in an undeployed state and to be unfurled into a deployed state by the deployment mechanism, the deployable antenna being further adapted to extend and unfurl during deployment from the deployment mechanism in the z-direction responsive to extension of the at least one axial support structure, the deployable antenna including one or more flexible membranes coupled to the at least one axial support structure and extending from the z-axis in the deployed state.

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.

The present invention relates to an ultra-wideband high-aperture efficiency planar reflectarray antenna, which includes a reflectarray and a feed antenna suspended directly above the reflectarray; the reflectarray is composed of a plurality of ultra-wideband units distributed in an array; the ultra-wideband unit includes a first dielectric substrate, a metal floor and a vertical dielectric substrate; a butterfly-shaped wide-arm dipole is printed on the front of the first dielectric substrate, and a first rectangular hole penetrating the first dielectric substrate is arranged at the center of the wide-arm dipole; a phase delay line in the form of a rectangular patch is printed on both sides of the vertical dielectric substrate; a second rectangular hole penetrating the metal floor is arranged in the middle of the metal floor; the vertical dielectric substrate passes through the second rectangular hole and the first rectangular hole and is electrically connected to the wide-arm dipole. The present invention has the advantages of ultra-wideband, high gain, high aperture efficiency and easy integration, and can be applied to long-distance communication systems that require high-gain antennas, such as deep space exploration, satellite communication, radar monitoring, etc.

The present invention relates to the field of antenna technology, specifically a logarithmic periodic antenna with a telescopic device, comprising a fixed rod, a support rod and a vibrator, the support rod being mounted on the telescopic head of the fixed rod via a rotating shaft, and the support rod being able to switch to a working state perpendicular to the fixed rod or a coaxial storage state as the telescopic head is raised and lowered; the vibrator is distributed on both sides of the support rod in a logarithmic periodic arrangement, and the vibrator is composed of a plurality of nested telescopic joints, wherein a limit rod and a bottom support with a slide groove are provided in the telescopic joint, and telescopic extension is achieved by sliding cooperation between the slide groove and the limit rod, and when fully extended, the telescopic joint is rotated and fixed by an elastic self-locking mechanism; the synchronous control device also includes a side seat mounted on the support rod, a driving guide rail rotatably mounted on the side seat, and a control slide mounted through the driving guide rail, the control slide being able to be connected to and pushed by the compression head on the top of the vibrator, so as to achieve the purpose of improving the portability and deployment stability of the antenna.

To provide a highly durable helical antenna with improved rust-proof properties, dust-proof properties, and scuff-proof properties of antenna elements. A helical antenna 1, in which a dielectric core 2 that is columnar in shape, antenna elements 3 and 4 that have helical patterns, and a resin tube 5, are disposed in that order from inside to outside, and the resin tube 5 is joined to an outer peripheral face of the dielectric core 2 in a vicinity at which the antenna elements 3 and 4 are covered. The resin tube 5 is longer than the dielectric core 2, the antenna elements 3 and 4 include first antenna elements 3 which are relatively short in accordance with a length of the dielectric core 2, and second antenna elements 4 which are relatively long in accordance with a length of the resin tube 5, and inside of a portion of the second antenna elements 4 that protrudes beyond the dielectric core 2 is an air region.

The invention discloses a rectangular double-helix Hilbert fractal antenna for detecting corona discharge, and relates to the field of corona discharge detection.The rectangular double-helix Hilbert fractal antenna comprises a dielectric substrate, a surface radiation structure is arranged on the front face of the dielectric substrate, and the surface radiation structure is formed by arranging a plurality of second-order Hilbert fractal units in a rectangular double-helix mode; the rectangular double helix is composed of a first helix and a second helix which are centrosymmetric, each of the first helix and the second helix is formed by sequentially connecting a plurality of second-order Hilbert fractal units, and the first helix and the second helix are embedded in a mosquito-repellent incense shape; the first helix and the second helix are respectively a grounding layer and a radiation element. The second-order Hilbert fractal antenna has the advantages that the second-order Hilbert fractal units are arranged in a rectangular double-helix manner to form a brand-new fractal antenna structure, resonance points of the antenna prepared by the structure can be smaller than-5dB within 100MHz-500MHz, the antenna has a wide detection range, and compared with an existing corona detection antenna, the accuracy is higher, and the gain is better.

A temperature sensing device for use with a cooking appliance including a temperature sensor configured to measure a temperature of a cooking chamber of the cooking appliance; a housing configured to be mounted on the cooking appliance; a temperature gauge including a needle configured to indicate the measured temperature of the cooking chamber; and a motor inside the housing and configured to actuate the needle of the temperature gauge. Further, a wireless signal repeater to transmit signals through a cooking appliance wall, having an interior antenna configured to be located in a cooking chamber of the cooking appliance; an exterior antenna configured to be located outside the cooking appliance; a housing configured to be mounted on the cooking appliance; a battery located in the housing for powering at least one of the interior and exterior antennas; and an insulating layer located outside an interior wall of the housing.