22 results about "Small antenna" patented technology

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 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 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.

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 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.

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.

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.

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 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.

In satellite communication systems, the cost of a terminal often corresponds to a maximum data rate that the terminal is required to transmit towards a satellite. The higher the data rate, the higher the Effective Isotropic Radiated Power (EIRP) the terminal may be required to radiate. The EIRP of the terminal is directly proportionate to the transmission power and to the effective area of the antenna. Using coherent transmission combining may facilitate a similar EIRP while reducing the cost of the terminal through using smaller antennas and lower radiated power. Methods, apparatuses, systems, and computer readable media are described herein for facilitating coherent combining of transmissions.

This invention discloses a PCB antenna for the LTE band, comprising a substrate divided into a clearance area and a functional area. A first antenna structure and a second antenna structure are disposed within the clearance area. The first antenna structure is located on the top surface of the substrate, and the second antenna structure is located on the bottom surface. The first antenna structure is an inverted L-shaped antenna or a PIFA antenna. The first antenna structure includes a feed terminal, a radiator, and a tuning segment located at the end of the radiator. The radiator of the first antenna structure is serpentine in shape, comprising multiple parallel line segments connected end-to-end. The tuning segment and the parallel line segments are parallel and of equal length. The two ends of the tuning segment and the two ends of the second antenna structure are connected through vias to form a loop circuit. This invention optimizes the antenna performance of the first antenna structure by adding a second antenna structure located on the bottom surface of the substrate, enabling it to achieve the corresponding antenna performance requirements in the target operating band with a very small antenna size.

The application discloses a vertical radiation opposite arrangement waveguide grating antenna for an optical phased array and a preparation method. The antenna comprises, from bottom to top, a column lens, a substrate, a buried oxygen layer, a lithium niobate layer, an upper cladding layer and a metal mirror. The lithium niobate layer is provided with a waveguide grating antenna array. The waveguide grating antenna array comprises waveguide grating antenna units arranged in an alternating opposite parallel manner. Each waveguide grating antenna unit comprises an optical waveguide and a plurality of groups of grating teeth connected to one end of the optical waveguide. The waveguide grating antenna array comprises at least two waveguide grating antenna units. Two adjacent waveguide grating antenna units are arranged in an opposite parallel manner, so that the optical waveguides of the adjacent units are located on different sides. The application increases the interval of the waveguides on the same side, effectively reduces the strong crosstalk problem between the waveguides, thereby supporting a smaller antenna period, so that the optical phased array has a larger scanning field of view. Meanwhile, the introduction of the gold mirror improves the unidirectional radiation efficiency and supports a higher power output.

This invention discloses a decoupling structure for a dual-polarized MIMO antenna, applied to a four-element MIMO antenna. It includes six dielectric substrates: S1, S2, S3, S4, S5, and S6. Metal structure P4 is attached to substrate S1, metal structure P3 to substrate S2, metal structure P2 to substrate S4, and metal structure P1 to substrate S6. S7 is a cross dielectric substrate, vertically placed directly below the antenna element. A U-shaped feed line P5 is attached to the back of S7, and a rectangular metal sheet P6 is attached to the front. S8 is another cross dielectric substrate, vertically placed between adjacent isolation wall dielectric substrates S9, with a U-shaped metal ring P7 attached to its back. S9 is a metal isolation wall surrounding the cross dielectric substrate S7. M is a metal reflector. The advantages of this invention lie in its innovative decoupling structure and the achievement of high isolation within a wide bandwidth while maintaining a relatively small antenna element spacing.

The application provides a non-frequency conversion elliptical dipole antenna applied to 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 support, the antenna oscillator comprises left and right antenna oscillators, and the cavity of the left and right antenna oscillators is internally provided with the antenna oscillator internal support frame; the antenna oscillator internal support frame in the left antenna oscillator is fixed with a box body for placing the receiver; the antenna feed structure is arranged between the left antenna oscillator and the right antenna oscillator; the left antenna oscillator is electrically connected with the shell of a first radio frequency connector in the antenna feed structure, and the right antenna oscillator is electrically connected with the 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 feed line. The non-frequency conversion elliptical dipole antenna realizes the characteristics of wideband non-frequency conversion, as small antenna pattern color difference as possible, integrated design of the antenna and the receiver, no balun coupling structure and smooth frequency response.

The application discloses a coupled dual-element bionic antenna circuit, which comprises a first input port X1, a second input port X2, a first output port Y1, a second output port Y2, a same-phase amplification circuit, an opposite-phase amplification circuit and an output coupling circuit; the first input port X1 and the second input port X2 are connected to the first input end and the second input end of the same-phase amplification circuit respectively, and the output end of the same-phase amplification circuit is connected to the output coupling circuit; the first input port X1 and the second input port X2 are connected to the first input end and the second input end of the opposite-phase amplification circuit respectively, and the first output end and the second output end of the opposite-phase amplification circuit are connected to the output coupling circuit; and the output coupling circuit is connected to the first output port Y1 and the second output port Y2. The application can reduce the power loss of a small antenna aperture radar system, realize phase difference amplification of a received signal, and adjust the position where the maximum value of the phase gain of the small antenna aperture radar system appears.

The present invention relates to a quantum magnetic field detecting device comprising a two-dimensional array of superconducting loops, acting as a high- efficiency transformer-free Magnetically Small Antenna (MSA), comprising Superconducting Quantum Interference Device (SQUID) loops with Josephson junctions and bare loops without Josephson junctions.

An antenna in a lightbulb may include a conductive plane (e.g., a ground plane) that includes an edge-enabled void antenna (EEVA) with the EEVA including a corresponding edge-enabled void isolator (EEVI). Use of both the EEVA and the EEVI allows for a small antenna footprint for incorporation into a lightbulb. Optionally, two EEVAs, each with a corresponding EEVI may be used. Various arrangements are provided to illustrate possible compromises between structural integrity and cooling. Further, by using two EEVAs, diversity reception and transmission is possible, increasing the utility of the lightbulb by expanding directionality of the transmission / reception and / or improving communication through spatial diversity.

To effectively interfere with authentication of an electronic key by an interference wave of low output.SOLUTION: The electronic key storage device 1 has a two substrate configuration divided into a main substrate 20 on which a main electronic circuit is mounted, and a small antenna substrate 30 on which an antenna peripheral circuit for vehicle LF reception and disturbance wave transmission and a disturbance wave antenna 31 are mounted, and the main substrate 20 is disposed on an upper surface of a partition plate 12 that partitions the electronic key storage device 1 in a vertical direction, and the antenna substrate 30 is disposed on a lower surface of the partition plate 12. An electronic key 90 is fixed to a key storage tray 14 below a partition plate 12. Since the disturbance wave LFjam can be applied in a spot manner by arranging the disturbance wave antenna 31 in the vicinity of the key antenna 91 of the electronic key 90 so as to face the key antenna 91, a high disturbance wave effect can be obtained even with a low output.SELECTED DRAWING: Figure 2

The invention provides an antenna structure and electronic equipment, and belongs to the technical field of antennas. The antenna structure comprises a first radiator, a second radiator and a break joint. The first radiator is provided with a first end and a second end, the second radiator is provided with a third end and a fourth end, the first end and the third end are located on the two sides of the breaking joint respectively, the second end extends in the direction away from the breaking joint and is grounded, and the fourth end extends in the direction away from the breaking joint and is grounded; when the first radiating body works in a first frequency band or a second frequency band, at least part of the second radiating body serves as a parasitic branch knot; according to the antenna structure provided by the invention, the first radiator and the second radiator can be used as the parasitic branches when each other works, and the radiation performance of each other is optimized, so that the radiation performance of each other can be improved in a relatively small antenna clearance. And the antenna performance can be maintained and even improved under the condition of small frame width.