632results about How to "Working bandwidth" patented technology

This invention relates to a micromachined capacitive microphone having a shallowly corrugated diaphragm that is anchored at one or more locations on the support has a plurality of dimples to support itself and rest freely on the perforated backplate. The diaphragm whose ends are not anchored is bounded by the taps of edge rail. Also disclosed includes: a fixed perforated backplate having one or more regions; an adjustable cantilever formed by the diaphragm, the support and the backplate; a plurality of dimples maintaining vertical separation between diaphragm and backplate; and the patterning of conductor electrodes carried by diaphragm and backplate.

A broadband antenna has a substrate, a coupling conductor, a conductor string, a ground conductor and a ground plane. The coupling conductor has a first coupling member and a second coupling member being separated from each other. The conductor string and the ground conductor are connected to the second coupling member. The conductor string extends along a direction opposite to the second coupling member. The ground conductor is connected to the ground plane. The broadband antenna uses the coupling conductor and the ground conductor to adjust input impedance for impedance match. The conductor string functions as a multi level resonance circuit to increase impedance bandwidth.

A microstrip patch antenna comprises a patch antenna element comprising a first conductive layer; dual probe feeds separate from each other and spaced from and field coupled to the patch antenna element for transmitting or receiving RF signals, each of the dual probe feeds having a conductor segment and a deltoid shaped conductive strip orthogonal to the conductor segment; the deltoid shaped conductive strips being coplanar; and a first dielectric material layer separating the first conductive layer and the coplanar deltoid shaped conductive strips.

Tensor transmission-line metamaterial unit cells are formed that allow the creation of any number of optic/electromagnetic devices. A desired electromagnetic distribution of the device is determined, from which effective material parameters capable of creating that desired distribution are obtained, for example, through a transformation optics/electromagnetics process. These effective material parameters are then linked to lumped or distributed circuit networks that achieve the desired distribution.

Low-profile, compact UWB embedded antenna designs are provided for use with computing devices, such as laptop computers, which enable ease of integration within computing devices with limited space, while providing suitable antenna characteristics (e.g., impedance matching and radiation efficiency) over an operating bandwidth of about 1 GHz to about 11 GHz.

The invention discloses a graphene electrode-based reflecting liquid crystal phase shift unit, which comprises two upper and lower layers of dielectric substrates, wherein a liquid crystal layer is injected into a gap between the two upper and lower layers of dielectric substrates; a plurality of metal patches which are sequentially connected in series through a connection line are arranged on the lower surface of the upper layer of dielectric substrate to form a layer of metal microstrip structure; a graphene layer completely covers the upper surface of the lower layer of dielectric substrate to form a graphene electrode; and a metal layer completely covers the lower surface of the lower layer of dielectric substrate to form a metal grounding electrode. The continuous phase shift characteristic is obtained within a broadband in an electric control manner; and the graphene electrode-based reflecting liquid crystal phase shift unit has the characteristics of being small and easy to process.

The invention relates to the field of communication and measurement control and especially relates to a dual polarization transmit-receive waveguide array antenna. The polarization transmit-receive waveguide array antenna includes N broadband dual polarization antenna sub arrays and a polarization adjusting device. Each broadband dual polarization antenna sub array includes a dual polarization opening waveguide array radiation layer and a network feed layer, wherein the dual polarization opening waveguide array radiation layer is arranged above the network feed layer and the polarization adjusting device is arranged below the network feed layer. By adopting the waveguide grid structure for feeding a plate satellite antenna, the working bandwidth of the plate satellite antenna is enlarged,share of transmit-receive of antenna opening and face is realized, radiation grating lobe is reduced and an interface is provided for automatic adjustment of electromagnetic wave polarization direction.

The invention provides a printing boardband terminal antenna with smaller occupying space. The printing boardband terminal antenna comprises a first bent metal strip group and a second bent metal strip group; a gap is formed between the first bent metal strip group and the second bent metal strip group; a microstrip feed line is used for directly feeding electricity to the first bent metal strip group so as to excite a high-frequency current on the first bent metal strip group to form resonance; and a high-frequency current on the second bent metal strip group is excited by capacitive coupling of the gap between the first bent metal strip group and the second bent metal strip group to form resonance. According to the invention, the first bent metal strip group and the second bent metal strip group are not directly connected, a plurality of frequency points are matched according to the distributed parameter effect of the gap between the two metal strip groups, and therefore the bandwidth can be widened in a larger extent. Therefore, the size occupied by the antenna can be reduced; in addition, a dedicated matching circuit and a special substrate material are not required in the invention.

The invention provides a data transmission method, equipment and a system. The data transmission method comprises the steps as follows: first network side equipment receives downlink business data from a core network and adopts first access technology; and the first network side equipment and the second network side equipment adopting second access technology cooperatively send the downlink business data to UE (Unified Equipment). The invention can solve the problems in the existing network deployment that the throughput of a user terminal is limited because the capacity of a single system is not enough and the resources are wasted because the load balance between the systems can be realized only in a switching and redirecting manner.

An electromagnetic bandgap structure comprising a progressive cascade of a plurality of patterns of cells. The cells of each pattern are dimensioned so that each pattern has a reflection phase response centered at a different, but closely-spaced, frequency compared with the reflection phase response of an adjacently positioned pattern, so that the combined reflection phase response of the plurality of patterns provides a continuous wideband operational range.

The invention provides a wideband dual-polarization vibrator comprising a vibrator body and two feeding sheets, wherein the vibrator body comprises a baseboard and two pairs of feeding Baran extending vertically outwards from the baseboard, and a radiation sheet vertically extends out of the tail end of each feeding Baran; the radiation sheet is provided with a first radiation strip and two second radiation strips, wherein the second radiation strips are symmetrically arranged on two sides of the first radiation strip; each second radiation strip comprises a first radiation part and a second radiation part, wherein an included angle between the first radiation part and the first radiation strip is smaller than an included angle between the second radiation part and the first radiation strip; and the length of the first radiation part is less than that of the second radiation part. Compared with the prior art, the first radiation strip and the second radiation strips can better radiate electromagnetic wave to occupy more bandwidth after the electromagnetic wave is led into the radiation sheet by the feeding cables, so that the operation bandwidth of the whole wideband dual-polarization vibrator is widened, and the diverse development of the current mobile communication is satisfied.

The invention discloses a linear power amplification circuit based on the simulation of predistortion, comprising a predistortion amplifier, a first temperature-controlled attenuator, a simulate predistorter, a second temperature-controlled attenuator, a push-pull amplifier, and a last stage high-power amplifier which are sequentially connected. The invention also discloses a method to use the circuit: the simulate predistorter circuit which has relatively simple topological structure is added to produce a distortion signal of a predistortion signal balanced power amplifier; a matching circuit and a bias voltage of a power tube of the push-pull amplifier and that of the last stage high-power amplifier are adjusted to make the two power tubes complement in amplitude and phase to achieve the predistortion effect and to enable better linearity of the RF output signal. The invention is simple in circuit structure, high in working efficiency, low in cost and occupies little PCB area, which is extremely suitable for the multi-carrier linear power amplification circuits in the TD-SCDMA stations and the repeaters systems.

The invention provides an adjustable broadband polarization conversion and dynamic geometric phase modulation device based on phase change material, comprising a metal reflecting layer, a phase changematerial layer, a dielectric isolation layer and a super surface structural layer sequentially from bottom to top. The design of the polarization conversion and geometric phase modulation device is carried out based on the phase change material; optical material parameters of the phase change material, such as crystal state and dielectric constant, are changed by means of electric excitation, optical excitation and thermal excitation; dynamic modulation of polarization conversion is achieved within a broad band range; accordingly, designs of a novel functional device, such as adjustable beamdeflection, plate lens, and calculation of holographic and orbital angular momentums. A method of the invention may provide further improved ability of electromagnetic modulation of super surface, anda new idea and technical scheme are provided for the design of novel adjustable-function electromagnetic modulation elements.

A dual directional coupler includes a housing, a main conductor, a forward coupled conductor and a reverse coupled conductor. The main conductor, the forward coupled conductor and the reverse coupled conductor are arranged in parallel within the housing such that the main conductor and the forward coupled conductor define a first two section quarter wave directional coupler, and the main conductor and the reverse coupled conductor define a second two section quarter wave directional coupler.

The invention discloses a broadband capacitive feed miniature microstrip paster antenna. A foam dielectric substrate is arranged between a microstrip dielectric substrate and an earth plate and thus the thicknesses of the dielectric substrates are increased; and an equivalent dielectric constant is reduced and a working band width of the antenna is extended. A metal short-circuit surface is loaded at an edge of one side of a radiation paster to form a standing wave structure from an open circuit to a short circuit; and the length of the antenna at the direction perpendicular to the short-circuit surface is a quarter of a wavelength. Slotting is carried out on the radiation paster and the path of an excitation current of the surface of the antenna paster is bent, thereby increasing the effective length of the antenna paster and thus reducing the resonant frequency and realizing miniaturization of the antenna at the another-dimensional dimension. Coupling and feeding are carried out by using a capacitive paster to realize good impedance matching, thereby reducing equivalent quality factors of the antenna and realizing increasing of the operating bandwidth of the antenna. According to the invention, a defect that the existing microstrip paster antenna can not consider the wide frequency band and miniaturization simultaneously can be overcome. The provided antenna has advantages of wide frequency band, low profile, small dimension, light weight, and easy processing.

The invention discloses a differential dual-band dual-polarized filtering antenna applied to a 5G Sub 6GHz base station system. The antenna comprises upper-layer and lower-layer dielectric substratesand four metal columns connecting the upper-layer and lower-layer dielectric substrates; the upper-layer dielectric substrate 1 is provided with a metal radiation patch, and a metal floor 2 is arranged on the upper surface of the lower-layer dielectric substrate and a metal feeder is printed on the lower surface of the same; the dual-band filtering property of the gain is acquired through slottingthe metal radiation patch and introducing a stepped impedance type open circuit branch knot into the metal feeder. The differential dual-band dual-polarized filtering antenna has the advantages of being simple in structure, easy to machine, relatively wide in resonant bandwidth within radiation band, relatively good in dual-band filter response, stable in gain and directional diagram, relativelylow in cross polarization, relatively high in port isolation, and easy to be integrated with the differential circuit. The differential dual-band dual-polarized filtering antenna can be applied to the5G Sub 6GHz base station communication system, and is particularly suitable for +/-45 degree dual-polarized base station antenna system of two bands: 3.3GHz-3.6GHz and 4.8GHz-5.0GHz.

The invention discloses a broadband, low-loss and high-balance-degree on-chip Balun. The broadband, low-loss and high-balance-degree on-chip Balun is provided with four regular-octagon plane spiral coils which are shaped like disc-like mosquito coils, the four regular-octagon plane spiral coils comprise two balance coils and two unbalance coils, the balance coils are arranged at the upper part, the unbalance coils are arranged at the lower part, an insulation layer is arranged between the balance coils and the unbalance coils, and an unsymmetrical broadside coupling structure is formed by the balance coils and the unbalance coils; an outer end point of a balance coil with narrower line width is used as an input, an outer end point of a balance coil with wider line width is suspended in the air, and inner end points of the two balance coils are connected through a metal guide line; and outer end points of the two unbalance coils are connected to input reference ground, inner end points of the two unbalance coils are respectively led out for being used as two outputs of a converter, and output reference ground and the input reference ground are connected through isolating lines of the balance coils and the unbalance coils.

The invention discloses an electrooptical modulator based on a phase-change material. The electrooptical modulator comprises an SOI substrate; the electrooptical modulator is characterized in that aninput waveguide, a mixing waveguide and an output waveguide connected in sequence are arranged on the SOI substrate in the horizontal direction, the mixing waveguide is formed by laminating a siliconwaveguide layer, a phase-change material GST layer and a copper electrode layer from bottom to top in sequence, the SOI substrate comprises a layer of silicon substrate body with the thickness of 250nanometers and a silicon dioxide layer with the thickness of 2 micrometers, the thicknesses of the input waveguide and the output waveguide are both 250 nanometers, the widths of the input waveguide and the output waveguide are both 400 nanometers, the thickness of the mixing waveguide is 290 nanometers, the width of the mixing waveguide is 400 nanometers, and silicon thin film with the thicknessof 10 nanometers is formed at one side of the silicon waveguide layer through selective erosion. The electrooptical modulator has the advantages that the size is small, on-substrate integration is facilitated, the energy consumption is low, the working bandwidth is large, the modulating depth is large, and the inserting loss is low.

An omnidirectional ultra-wideband monopole antenna, with the characteristics of simple structure, easy fabrication and low cost, mainly comprises a ground plane, a U-shaped radiating member above the ground plane and a feeding member for feeding signals to the radiating member. The radiating member further comprises a first sub-radiating member parallel to the ground plane, with a first side edge and a corresponding second side edge, a second sub-radiating member connected to the first side edge and perpendicular to the first sub-radiating member, forming a first angle therebetween, and a third sub-radiating member connected to the second side edge to form a second angle. The second sub-radiating member and the third sub-radiating member are extended in the same upright direction above the ground plane. The antenna can provide good omnidirectional radiation patterns for frequencies across a very wide operating bandwidth.

The invention relates to a wideband log-periodic dipole array antenna for feeding a substrate integrated waveguide. An upper metal coating (2) is provided with an upper assembly line (5), upper feed source element antennae (7), an upper surface (9) of the substrate integrated waveguide, a microstrip taper transition line (6) and a 50-ohm output microstrip line (8) which are sequentially connected, wherein the upper assembly line (5) is connected with the upper surface (9) of the substrate integrated waveguide, the upper feed source element antennae (7) are respectively arranged at both sides of the upper assembly line (5); a lower metal coating (3) comprises a lower surface assembly line (11) of the log-periodic dipole array antenna, lower surface feed source element antennae (12), a lower surface (13) of the substrate integrated waveguide and a ground surface (14) of a microstrip line; the lower surface assembly line (11) of the log-periodic dipole array antenna is symmetric in parallel to the upper assembly line (5) of the log-periodic dipole array antenna, the lower surface feed source element antennae (12) are symmetric in cross to the upper feed source element antennae (7); and the lower surface (13) of the substrate integrated waveguide is symmetric to the upper surface (9) of the substrate integrated waveguide and is connected with the ground surface (14) of the microstrip line.