52 results about "Small antenna" patented technology

The invention relates to the technical field of electronic recording carriers, in particular to an RFID electronic tag and a manufacturing method thereof. The method comprises the following steps that a small antenna packaged with a chip is attached to the attaching surface of bearing base cloth and fixed through dispensing, wherein non-imitation cloth of the bearing base cloth is composed of fabric; pressing the pressing cloth strip and the bearing base cloth through a roll-to-roll pressing process, so that the pressing cloth strip covers the electronic tag body and forms a clamping and fixing structure; arranging a plurality of electronic tag bodies on a base band in an array form, and conveying the electronic tag bodies to a roll-to-roll detection device to carry out functionality and consistency testing; after the test is completed, carrying out surface printing, laser code engraving and UV code printing on the electronic tag body; and obtaining target product information and writing the target product information into the RFID chip. According to the invention, efficient production of the RFID electronic tag is realized through a roll-to-roll pressing and fixing technology, so that the production efficiency is improved, and the tag identification performance and traceability are improved.

The present disclosure provides a ceramic antenna and a preparation method thereof, the ceramic antenna comprising a ceramic substrate in a special shape, and a coaxial line welded on a silver layer printed on the ceramic substrate. The high dielectric plastic ceramic antenna is prepared through the steps of preparing a special ceramic substrate, printing antenna lines, and welding a coaxial line. Compared with the commonly used FPC antenna and LDS antenna, the ceramic antenna has a larger dielectric constant, a smaller antenna size, a lower loss, and a bandwidth basically meeting the WiFi frequency band. The coaxial line is directly welded on the silver layer on the surface of the ceramic, which well meets the connection requirements of a notebook computer network card.

The application belongs to the technical field of simulation test, and particularly discloses a dynamic space simulation method for a global satellite navigation constellation, which is based on the idea of optimizing the overall antenna layout and locally compensating power, and proposes a dynamic space simulation method for the global satellite navigation constellation. The key core of the method is a design process based on triangular antenna layout and a local navigation signal power compensation strategy. The method has the advantages of small antenna quantity requirement, uniform layout, simple antenna path calculation, etc. By using the dynamic space simulation method for the global satellite navigation constellation, the construction of a dynamic test environment for all visible satellite navigation signals from different directions at any position in the global range can be realized in the test space, and the simulation of all visible satellite navigation signals at any position in the global range can be realized.

To provide a compact antenna with high transmission and reception efficiency for low-frequency radio signals, which have good permeability through bedrock, on a radio detonator.SOLUTION: A radio detonator 10 has an antenna 20 that transmits and receives radio signals and receives driving energy via a radio method. The radio detonator 10 has an operating capacitor 12e that stores energy received by the antenna 20 and a detonation capacitor 12f. The radio detonator 10 has an electric detonator 15 that detonates using electricity from the detonation capacitor 12f. The antenna 20 has a first coil 21, which is electrically connected to a receiving circuit, a transmitting circuit, and the operating capacitor 12e, and is wound with a first number of turns. The antenna 20 has a second coil 22, which is provided adjacent to and substantially coaxially with the first coil 21 and is wound with a second number of turns greater than the first number of turns. The antenna 20 has a resonant capacitor 23 electrically connected to the second coil 22.SELECTED DRAWING: Figure 3

The scheme discloses a POS machine miniaturization large-bandwidth high-efficiency antenna, which uses a small antenna size to excite a low-frequency working mode of a mainboard, uses components such as a camera FPC and an NFC coil which are not conducive to the antenna to expand the frequency, realizes better low-frequency bandwidth, changes the disadvantage into an advantage, optimizes the shape of the antenna working at a high frequency and places the antenna at a suitable position to excite the NFC coil and the rear camera FPC to generate a low-frequency resonance, thereby expanding the antenna bandwidth to a low frequency enough to cover common low-frequency communication frequency bands, and finally realizes a very small space-occupied and very high-efficiency large-bandwidth antenna.

This invention relates to the field of microstrip antenna technology, and more particularly to a tightly spaced MIMO microstrip antenna with adjustable E-plane radiation pattern. The antenna includes main patch elements, a quarter-wavelength impedance transformation line, a feed transmission line, a dielectric substrate, a metal ground plane, a metal ground wall, and a metal strip. Two main patch elements are located on the upper surface of the dielectric substrate with a spacing of 2.58 mm. This invention places a metal strip with etched bends between the two patch elements arranged in the E-plane. The antenna energy is coupled to the metal strip through near-field coupling and excites the gaps, resulting in a combination of gap radiation energy and antenna radiation energy, which modulates the tilted radiation pattern. This achieves side-firing close to the gap antenna elements. Simultaneously, the metal ground wall below the metal strip extends the ground current path, achieving decoupling. This invention improves the isolation between the two tightly spaced patch elements along the E-plane and enables adjustable unilateral radiation patterns, making it suitable for future small MIMO antennas.

The present invention belongs to the technical field of low-frequency small antennas, specifically relating to a low-frequency mechanical magnetoelectric antenna based on a cantilever beam structure. By setting the neutral plane of the magnetoelectric cantilever beam to coincide with the interface between the piezoelectric material layer and the magnetostrictive material layer, the present invention effectively solves the problem of polarization cancellation of the piezoelectric layer or magnetization of the magnetostrictive layer caused by the inappropriate positioning of the neutral plane during thickness bending vibration of the layered magnetoelectric composite material. This not only saves unnecessary material costs, but also further improves the inverse magnetoelectric coupling coefficient of the magnetoelectric composite material, while taking into account the operating frequency, impedance, and quality factor. The device can operate at frequencies ranging from tens of Hz to several kHz and can be reduced to the centimeter level, significantly reducing the size of a single antenna and promising the implementation of array antennas on mobile platforms.

The application provides a communication performance detection method, medium and equipment of a small antenna, relates to the technical field of antenna performance testing, and matches communication requirements based on a signal source setting library, connects to the antenna to be tested after setting the transmission frequency and power of the signal source; installs the antenna to be tested on a rotating table and rotates according to a preset rotating angle scale; performs multiple signal parameter analyses, obtains a signal parameter set sequence, performs centralized analysis, and determines a representative signal parameter sequence; iteratively analyzes the sequence to determine an effective radiation area; further completes communication directivity detection analysis, and obtains a detection result. The application solves the technical problems in the prior art that signal source parameter configuration relies on manual setting, different communication requirements are difficult to accurately adapt, and the test preparation efficiency is low, the adaptability is poor, and the subsequent detection is insufficient, and achieves the technical effects of enhancing test flexibility and accuracy.

The embodiment of the invention relates to the technical field of semiconductors, and discloses a ridge waveguide antenna subarray, a waveguide antenna array, a radar and electronic equipment, and the ridge waveguide antenna subarray comprises a ridge waveguide and a radiation part; the ridge waveguide is hollow, and the radiation part is arranged on the ridgeless wide wall of the ridge waveguide; the radiation part comprises at least two radiation slots; a ridge is arranged on the ridge wide wall in the ridge waveguide; wherein the ridges are located below the at least two radiation slots, and the sizes of the ridges below the at least two radiation slots are not completely the same. The ridge waveguide antenna provided by the scheme has the characteristics of smaller antenna size and wider bandwidth.

This utility model discloses a small antenna with a base, relating to the field of antenna base technology. The small antenna with a base includes a base and a flexible support assembly. The flexible support assembly includes a top cover, rotating parts, a threaded cylinder, a threaded rod, a guide block, a guide plate, and a fixed support assembly. The top cover is fixedly connected to the top of the base. Multiple rotating parts are equidistantly rotatably connected to the surface of the top cover in a circumferential array. The threaded cylinder is fixedly connected to the bottom of the rotating parts. The threaded rod is threadedly connected inside the threaded cylinder. The guide block is fixedly connected to the surface of the threaded rod. The guide plate is fixedly connected inside the base, and the guide block and guide plate are slidably connected. The synergistic effect of multiple components improves the terrain adaptability and structural stability of the device. The rotatable connection allows the support components to flexibly adjust their angle according to the terrain, and the threaded transmission combined with the guide structure enables precise adjustment of the support height.

An antenna assembly performs a method for operating an electrically small antenna (ESA). The antenna assembly includes a drive circuit for operating the ESA. The drive circuit includes a resonator having a first resonant frequency, a variable coupling element that controls an electrical connection between the drive circuit and the ESA, a first modulator that modulates the variable coupling element at a first tonal frequency, and a second modulator configured to modulate the variable coupling element at a second tonal frequency. The first tonal frequency is a sum of the first resonant frequency and a second resonant frequency of the ESA. The second tonal frequency is a difference between the first resonant frequency and the second resonant frequency.

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.

Embodiments of the present invention relate to the technical field of vehicle-mounted radar, and particularly to a millimeter-wave vehicle-mounted radar antenna transmitting device. The vehicle-mounted millimeter-wave radar transmitting device includes a plurality of transmitting antennas, a plurality of phase shifters, a controller, and a signal transmitting device. By simultaneously controlling the initial phases of the transmitted signals corresponding to multiple transmitting antennas and strictly controlling the spacing distances between multiple transmitting antennas, spatial synthesis of multiple transmitted signals is achieved. Embodiments of the present invention can achieve an increase in the detection range of vehicle-mounted radar antennas under the conditions of small antenna size and low power consumption.

This invention relates to the field of antenna technology, and specifically discloses an antenna and its fabrication method. The antenna includes a radiating component, a transmitting component, and a first conductive element. The radiating component includes multiple radiating plates stacked along a first direction, and each first radiating plate includes a first dielectric layer. The transmitting component includes multiple transmitting plates stacked along the first direction, each transmitting plate including a second dielectric layer. The first conductive element connects a radiating plate of the radiating component to a transmitting plate of the transmitting component. The dielectric constant e1 of the first dielectric layer is greater than the dielectric constant e2 of the second dielectric layer, and the loss tangent d2 of the second dielectric layer is less than the loss tangent d1 of the first dielectric layer. Through this method, the radiating and transmitting plates of the antenna in this embodiment of the invention use two different dielectric materials. The radiating plate with a larger dielectric constant allows for a smaller antenna size, while the transmitting plate with a smaller loss tangent results in higher transmission efficiency. Therefore, this antenna combines the advantages of high transmission efficiency and small size.

The application relates to the technical field of antennas, and provides a UWB positioning sheet metal antenna and an Internet of Things device, wherein the UWB positioning sheet metal antenna comprises a first antenna radiator unit, a second antenna radiator unit and a metal ground which are integrally formed by sheet metal, further comprises a first radio frequency coaxial transmission line and a second radio frequency coaxial transmission line, in use, the UWB positioning sheet metal antenna is fixed in the interior of the device through the positioning hole and the screw hole on the metal ground, the radio frequency coaxial transmission line transmits a UWB signal to the circular arc short groove on the antenna radiator unit, and the antenna radiator unit converts a current signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the free space. The UWB positioning sheet metal antenna provided by the application has the advantages of small space occupation, convenient assembly and disassembly, small antenna loss, high radiation efficiency, stable signal radio frequency and accurate positioning.

The utility model discloses a small antenna lodging device, which relates to the technical field of antenna lodging, and comprises a shell, a worm and gear assembly, a gear set transmission assembly, a motor assembly and a lodging frame, and the shell is provided with a first accommodating chamber and a second accommodating chamber which are horizontally separated from each other; the worm gear and worm assembly comprises a worm horizontally and rotationally arranged at the bottom of the first containing cavity, an arc-shaped worm gear in meshing transmission with the worm and a rotating shaft horizontally penetrating out of the first containing cavity, and the arc-shaped worm gear is arranged on the rotating shaft in a penetrating mode and located at the top of the first containing cavity; the gear set transmission assembly is installed in the second containing cavity and is in transmission connection with the side, extending into the second containing cavity, of the worm. The motor assembly is installed in the second containing cavity, and an output shaft of the motor assembly is connected to the end of the worm. The lodging frames are fixedly installed on the two sides of the rotating shaft and used for fixing and supporting the antenna. According to the device, the overall height can be reduced, and the lodging angle can be larger than 90 degrees.

The invention relates to the technical field of wireless communication, and discloses an electrically small antenna based on a Rubik's cube structure, which comprises a metal ring structure formed by three-dimensional orthogonal folding, a cube Rubik's cube structure formed by splicing at least three different types of substrates, and the numbers of the three types of substrates are different; the metal ring structures are printed on the six substrates of the cube magic cube structure through microstrip lines; wherein the metal ring structure excites the combination of the multi-magnetic coupling ring and the galvanic coupling in a single-feed or double-feed mode, and an omnidirectional radiation or dual polarization function under a small electrical size is realized. According to the invention, an omnidirectional radiation or dual polarization function can be realized under a small electric size (kilt; 1), and the cubic frame formed by self-splicing of the substrates has an electromagnetic isolation characteristic without additional packaging.

To provide a GNSS positioning system in which errors of a receiver itself are reduced.SOLUTION: Provided is a GNSS positioning system 100 comprising an antenna 20 for receiving a positioning signal from a GNSS satellite, and a control computation unit 35 for calculating the location of center O of the antenna 20 on the basis of the positioning signal. The antenna 20 includes three small antennas 21a, 21b, 21c. The three small antennas 21a, 21b, 21c are arranged so as to form an equilateral triangle on a circle centering on the center O of the antenna 20. The control computation unit 35 calculates the respective positions of the three small antennas 21a, 21b, 21c from the respective positioning signals, and calculates the center of gravity G4 of a calculated triangle 42, with calculated positions of the three small antennas 21a, 21b, 21c as its vertices, as the center position of the antenna 20.SELECTED DRAWING: Figure 2

The invention discloses a small-caliber narrow-band micro-strip planar antenna, a radio frequency assembly and electronic equipment. The transmitting frequency of the small-caliber narrow-band micro-strip planar antenna is 5925 MHz to 6425 MHz; the receiving frequency is 3700 to 4200 MHz; the size of the antenna does not exceed 200mm * 200mm; at the center frequency point, the maximum receiving gain of the antenna is not lower than 15 dBi, and the maximum transmitting gain is not lower than 17 dBi. On the premise of strictly limiting the size, the unification of high gain, high isolation and low profile is realized through flexible array configuration and isolation design, and various selectable implementation schemes which can meet the characteristics of miniaturization, light weight, low cost and the like are provided for users; an optimized single frequency conversion architecture, a highly integrated chip and a filtering scheme are adopted, miniaturization of the radio frequency assembly is achieved, and the radio frequency assembly can work cooperatively with a small antenna array.

An existing small antenna pedestal structural member is still large in weight and size, complex in structure, high in cost, inconvenient to quickly assemble and adjust, inconvenient to measure the assembly precision and not suitable for being used as a device for testing the skill of an assembly bench worker. The invention provides a radar antenna pedestal which is light, economical and easy to operate and manually adjust, comprises an azimuth assembly platform, an azimuth gear transmission combination, a pitching antenna pedestal combination and an array plane combination, and can be used for testing assembly and metering measurement capabilities of equal-height adjustment, gear transmission meshing, bearing assembly clearance elimination, positioning pin matching and the like of a bench worker. The assembling process needs to be similar to a pitching azimuth radar antenna pedestal, equal-height adjustment is needed, assembling actions such as gear transmission, bearing assembling clearance elimination and positioning pin matching are included, and geometric errors such as coaxiality, end face, radial circle run-out, gear meshing backlash and planeness of all transmission parts of the antenna pedestal can be conveniently measured through a lever dial indicator.

The application discloses an antenna device, comprising a bottom plate, the bottom plate is provided with a first end and a second end, a first side and a second side, a first surface and a second surface. The first surface of the bottom plate is sequentially provided with a first radiation part, a second radiation part, a feeding part and a grounding part from the first end to the second end, one end of the feeding part is connected with the first radiation part and the second radiation part, and the other end of the feeding part is connected with the grounding part. A microstrip line is arranged on the second surface of the bottom plate, and the microstrip line is connected with the feeding part. Wherein, the first radiation part is provided with a first gap and a second gap, the grounding part is provided with a third gap, a fourth gap, a fifth gap and a sixth gap, and the microstrip line feeds the third gap to the sixth gap. Through the design of the first radiation part, the second radiation part and the six gaps, the antenna device has the advantages of being compatible with 4G LTE frequency band and 5G frequency band, small antenna structure size and good electrical performance in the working frequency band.

According to the frequency conversion resonance matching low-frequency antenna and the communication system provided by the invention, frequency conversion modulation is performed on a low-frequency electric field signal capable of being propagated in seawater and a high-frequency modulation signal through up / down conversion of the modulation electrode, and high-efficiency and high-sensitivity signal receiving and transmitting can be realized by using a small antenna size. The high-Q-value quartz crystal resonator suppresses various harmonic components and noise through narrow-band filtering characteristics and improves the signal-to-noise ratio of the receiving antenna, meanwhile, the quartz crystal resonator is perceptual by controlling the working frequency, resonance matching is achieved between the quartz crystal resonator and a capacitive internal resistance underwater antenna, the sensitivity and the resolution ratio of a received electric field signal are greatly improved, and the receiving efficiency is improved. Therefore, the miniaturized transmit-receive antenna can realize long-distance underwater wireless communication. The antenna communication system can be flexibly applied to communication of a seabed sensor network, an underwater platform and an underwater vessel, a miniaturized underwater antenna array can be conveniently constructed, and sea-land-air multi-domain communication is realized.

An example antenna assembly includes an electrically small antenna having at least two sectors, wherein the at least two sectors are coupled to operate in at least a first mode and a second mode, the first mode is a radiative mode having a resonance, and the second mode is a non-radiative mode. The antenna assembly includes at least one time-varying reactive component having a parametric modulation frequency configured to at least partially couple the resonance of the radiative mode to the resonance of the non-radiative mode at a negative frequency, wherein the parametric modulation frequency of the at least one time-varying reactive component is greater than or less than a frequency value which exactly couples the resonance of the radiative mode to the negative frequency of the non-radiative mode.

This item is a coaxial connector that is attached to an antenna attachment fixture attached to the outer panel of an automobile body using a nut. As shown in Reference Figure 1, which shows the attached state, this item has a coaxial connector on the right side in the front view, which allows it to be attached to a small antenna attachment fixture a, and the cable with coaxial connector can be kept detached when not in use, making it easy to switch the connection state. Furthermore, as shown in Reference Figure 2, which shows the used state, when in use, the antenna b is attached to the upper coaxial connector, and the cable with coaxial connector c is attached to the coaxial connector on the right side. This item is subject to single transaction.

Modulation schemas for electrically-small, non-linear-and-time-invariant (non-LTI) antennas are described. A first antenna modulation circuit selectively transmits a first signal at a first predetermined frequency and a second predetermined frequency via a first electrically-small antenna (ESA) according to a first modulation schema. A second antenna modulation circuit selectively transmits a second signal at a third predetermined frequency and a fourth predetermined frequency via a second electrically-small antenna according to a second modulation schema. A receiver circuit configured receives a radiated signal being a total of the first signal and the second signal, and demodulates the radiated signal.

The invention provides a non-frequency-variable elliptical dipole antenna applied to frequency spectrum measurement, which comprises a receiver, an antenna feed structure, an antenna oscillator, an antenna oscillator internal support frame, a folding arm and an antenna bracket, and is characterized in that the antenna oscillator comprises a left antenna oscillator and a right antenna oscillator, and the antenna oscillator internal support frame is arranged in a cavity of the left antenna oscillator and the right antenna oscillator; a box body for placing a receiver is fixed on the antenna oscillator internal support frame in the left side antenna oscillator; the antenna feed structure is arranged between the left side antenna oscillator and the right side antenna oscillator; the left antenna oscillator is electrically connected with a shell of a first radio frequency connector in the antenna feed structure, and the right antenna oscillator is electrically connected with an inner core of a second radio frequency connector in the antenna feed structure; and the first radio frequency connector is connected with the receiver through a feeder line. According to the non-frequency-variable elliptical dipole antenna, the broadband non-frequency-variable characteristic is achieved, the color difference of an antenna pattern is as small as possible, the antenna and a receiver are integrally designed, no balun coupling structure exists, and the frequency response is smooth.

The invention relates to an airborne miniaturized short-wave direction-finding antenna, which comprises three groups of electric antennas, three groups of magnetic antennas and an active circuit module, the electric antennas are cylindrical hollow radiation oscillator structures, the cylindrical hollow radiation oscillator structures are provided with transverse grooves, and the magnetic antennas comprise ferrite magnetic bars and coils wound on the ferrite magnetic bars. The magnetic antennas are arranged inside the electric antennas, one magnetic antenna and one electric antenna corresponding to the magnetic antenna form a group of antennas, the three groups of antennas are arranged orthogonally, and the electric antennas and the magnetic antennas are electrically connected with the active circuit module respectively. The equipment construction efficiency and the equipment installation precision are improved. The antenna system can effectively detect electromagnetic wave signals from a space in all directions, overcomes the limitation of a traditional small antenna system in signal detection directivity, optimizes the antenna structure, and introduces an active circuit module to improve the performance of the antenna system.

The utility model relates to a flexible circuit board, an antenna and electronic equipment, the flexible circuit board is provided with a signal line and a first arrangement area, the first arrangement area is provided with a feed point used for being connected with an antenna radiator, and the signal line is used for connecting the feed point with a mainboard of the electronic equipment so as to electrically connect the feed point with an antenna chip located on the mainboard, the impedance of the signal line is set to be smaller than preset impedance. The antenna radiator of the antenna can be directly connected with the main board of the electronic equipment through the flexible circuit board, so that firstly, the cost of the whole antenna is reduced because a small antenna board is not needed, and the cost of the whole electronic equipment is reduced; secondly, the structure of the electronic equipment is simplified, the space utilization rate in the electronic equipment is improved, and arrangement of other components in the electronic equipment is facilitated; and thirdly, the preset resistance value is reasonably designed, so that the overall resistance value of the antenna adopting the flexible circuit board is relatively small, and the antenna has relatively high performance and efficiency.

The double antenna comprises a left antenna and a right antenna, the left antenna and the right antenna are consistent in size, structure and shape, the left antenna comprises a radiation unit, the radiation unit is arranged in a winding form structure, the two sides of the front end of the radiation unit are bent inwards, the top of the rear end of the radiation unit is connected with a coaxial feeder line, and the coaxial feeder line is connected with the left antenna and the right antenna. Short-circuit metal sheets are connected to two sides of the bottom of the rear end of the radiation unit. According to the utility model, the left antenna and the right antenna are arranged in a winding form structure, so that the antenna size is smaller, and the radiation unit has good omnidirectivity, so that antenna working states in different scenes can be realized, and accurate positioning application scenes such as digital keys, intelligent tags, asset tracking and position service can be conveniently handled; and meanwhile, the single antenna can be flexibly configured to work independently to adapt to specific working requirements of radio frequency transceiving, so that the service space is expanded.

An antenna assembly performs a method for operating an electrically small antenna (ESA). The antenna assembly includes a drive circuit for operating the ESA. The drive circuit includes a resonator having a first resonant frequency, a variable coupling element that controls an electrical connection between the drive circuit and the ESA, a first modulator that modulates the variable coupling element at a first tonal frequency, and a second modulator configured to modulate the variable coupling element at a second tonal frequency. The first tonal frequency is a sum of the first resonant frequency and a second resonant frequency of the ESA. The second tonal frequency is a difference between the first resonant frequency and the second resonant frequency.