33results about How to "Achieve Broadband Performance" patented technology

The invention relates to the technical field of microwave antennas, in particular to a coplanar waveguide fed broadband ultra-surface antenna, which comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, an electromagnetic ultra-surface part, an excitation layer part and a short-circuit reflecting floor part. Antenna radiation is achieved by using thegap of the ultra-surface, and good broadside characteristic is achieved; a micro-strip loaded butterfly-shaped fed gap is used for coupling excitation of the ultra-surface, thereby successfully exciting three resonant modes in the ultra-surface; the relative midbandwidth reaches 51.2%; compared with the ultra-surface antenna before, the impedance bandwidth is greatly improved; the short-circuit reflecting floor structure is used in the invention so that not only backward radiation suppression of the antenna is realized but also a low-profile design is finished. The coplanar waveguide fed broadband ultra-surface antenna in the invention realizes the broadband radiation bandwidth performance and good radiation characteristic of the planar antenna and can effectively enhance the performance of the antenna in a radar, imaging, wireless communication and other systems.

The invention relates to a metal cavity broadband antenna. According to the basic structure, the metal cavity broadband antenna comprises a flat-box-shaped hollow metal cavity with gaps formed in the top and a coaxial connector. The gaps formed in the upper surface of the metal cavity comprise the I-shaped gap in the middle of the top of the metal cavity, the linear gaps in the two sides of the top of the metal cavity, and technological gaps in the two sides of the metal cavity in the length direction in the shape of []. An inner conductor of the coaxial connector stretches into the metal cavity and is connected with the inner top of the metal cavity. The integrated single metal cavity structure is adopted for the metal cavity broadband antenna and thus is simple in structure, and the antenna machining difficulty is reduced. The single metal material is adopted, so that hidden danger of deformation and layer disengagement caused by different expansion coefficients of multiple materials is eliminated. Because the metal material is good in thermal conductivity and electrical conductivity, thermal control design and electrostatic protection of a satellite-borne phased-array antenna are facilitated. The metal cavity and the gaps are all made full use of, and thus the broadband performance of the antenna is achieved. The profile of the antenna is low, when the antennas are used for combining a planar antenna array, the planar antenna array is of a honeycomb structure, and the metal cavity broadband antenna has the advantage of being high in structural strength.

The invention discloses a double-frequency filtering power divider for WLAN (wireless local area network). The double-frequency filtering power divider comprises a substrate (1), a broadband power divider (2) and a double-frequency filter (3). The double-frequency filtering power divider has the advantages that the filtering and power distribution functions are integrated, two resonance points are produced at the working frequency band of the WLAN, and the miniature design is favorably realized in a WLAN communication system; the broadband power divider (2) is of a T-shaped node structure, the broadband property is realized, and the insertion loss is less than the insertion loss of the traditional Wilkinson power divider; the basic type of the double-frequency filter (3) adopts a two-order SIR (step impedance resonator), and two different resonance points can be obtained by adjusting the widths and lengths of two micro band lines of the SIR.

The invention discloses a pattern-reconfigurable filter antenna, comprising a dielectric substrate and a filter antenna module and a control module located above and below the dielectric substrate respectively. The filter antenna module comprises a feeder line, a multimode resonator and a transmitting antenna. Energy is transmitted in a coupling way between the multimode resonator on one hand andthe feeder line and the transmitting antenna on the other hand. The control module comprises a reflector and a reflector switch. The reflector is used for reflecting the electromagnetic wave radiatedby the transmitting antenna to control the radiation direction of the transmitting antenna. The reflector switch is used for controlling the enabling of the reflector. The impedance characteristic andfrequency characteristic of the filter antenna can be kept basically unchanged while the pattern of the filter antenna is reconfigurable.

A method of communicating using evolutionary synthesis for band-limited voice and data channels.

The present invention relates to a winding device (1) for a cross-wound bobbin-producing textile machine having a bobbin drive roller (3), a coil frame (5) for rotatably supporting a cross-wound bobbin (4) and a coil frame axis (6) rotationally fixed to the coil frame (5) is, has an extension through the connection with the coil frame (5) and for pivoting out of the coil frame (5) is pivotally mounted. According to the invention, the winding device (1) comprises a vibration damper (46) having an absorber mass (40, 42) and an associated elastic member (41, 43) and the elastic element (41, 43) engages in the region of the extension of the coil frame axis (6) spaced apart on the creel shaft (6) from the bobbin frame (5).

The invention discloses a radio frequency micro-electromechanical microstrip antenna, and belongs to the technical field of wireless communication. The radio frequency micro-electromechanical microstrip antenna comprises a metal frame and a microstrip antenna unit, wherein the microstrip antenna unit comprises a first adapter plate, a second adapter plate and a third adapter plate; metal shieldingstructures surrounding the central areas of the respective adapter plates are arranged on the three adapter plates, and the vertical interconnection of the metal shielding structures among the threeadapter plates is achieved by BGA interconnection structures; a first radiation patch is arranged on the front face of the first adapter plate; an air hole and a parasitic patch are arranged on the second adapter plate; a second radiation patch is arranged on the front face of the third adapter plate, and a reflecting surface s arranged on the back surface of the third adapter plate; and a feedinghole and a grounding hole are formed in the central area of the third adapter plate. The radio frequency micro-electromechanical microstrip antenna disclosed by the invention has the characteristicsof low profile, high gain and high bandwidth, and can solve the problems of narrow bandwidth and low gain of a low-profile microstrip antenna of a semiconductor substrate with a high dielectric constant.

The invention relates to the technical field of antennas, and relates to a circularly polarized patch antenna shaped like a Chinese character 'jia'. The antenna includes a ground plate and a dielectric layer plate, wherein the ground plate and the dielectric layer plate are parallel to each other. The dielectric layer plate is arranged above the ground plate. A metal sheet A is arranged at the top of the dielectric layer plate, and a metal sheet B is arranged at the bottom. A 3D L-shaped probe is arranged between the ground plate and the dielectric layer plate. The 3D L-shaped probe consistsof a vertical rod and two horizontal rods of equal length. One end part of one horizontal rod and one end part of the other horizontal rod are fixedly vertically connected. The top of the vertical rodis fixedly connected with the common end part of two horizontal rods. Each horizontal rod is parallel to the dielectric layer plate. The vertical rod is perpendicular to the ground plate. The groundplate is provided with a through hole. The lower end of the vertical rod passes through the through hole and is connected with the coaxial connector arranged at the bottom of the ground plate. The ground plate and the dielectric layer plate are square, and the length of the sides is the same. The metal sheet A is shaped like a Chinese character 'jia'. The antenna provided by the invention has theadvantages of simple structure, low cost, beautiful appearance, safety and reliability.

The invention provides a broadband multi-layer flat-plate dual polarized antenna array, comprising horizontal radiation units arranged in the form of an n*m array, vertical radiation units arranged inthe form of an m*n array, a plurality of balanced feed structures, an upper dielectric material, a middle dielectric material plate, a lower dielectric material plate, a metal bottom plate and a feeddevice, wherein n and m are integers. The antenna array achieves a broadband effect by adopting the technical measures of using the radiation units with step structures for enhancing the coupling effect and the balanced feed structures, loading dielectric layers above the radiation units and the like. At the same time, since the horizontal radiation units and the vertical radiation units are spatially perpendicular to each other, dual polarization performance is formed.

The invention discloses a multifunctional polarization adjusting component based on a three-dimensional composite structural unit. A surface of a metal film has multiple periodically arranged three-dimensional T-shaped structural units; the three-dimensional T-shaped structural units include a first structure and a second structure which are both square tile-shaped structures, and the first structure and the second structure are vertically arranged and spaced apart to form an approximately T-shaped structure; a first frequency band has the quarter-wave plate function, a second frequency band has the half-wave plate function, and the first frequency is lower than the second frequency. Similarly, the multi-functional polarization adjusting component based on the three-dimensional composite structural unit is disclosed, a first frequency band has the half-wave plate function, and a second frequency band has the quarter-wave plate function. The adjusting component is advantaged in that thecomposite structural unit can be utilized to realize different optical functions in different working frequency bands in the infrared band to further promote miniaturization and integration of an optical component.

The invention discloses a broadband dipole. The broadband dipole comprises a reflection plate and a radiation unit installed on one side surface of the reflection plate. The radiation unit comprises aradiation assembly, a feed balun and a matching network. The radiation assembly is electrically connected with the matching network through the feed balun, the matching network is fixed on the reflection plate, and the radiation assembly is integrally of a curved surface structure arched towards the direction far away from the reflection plate. The radiation assembly comprises a flexible radiation base body and an insulating supporting piece, wherein the radiation base body is attached and fixed on the insulating supporting piece, and the insulating supporting piece is fixedly connected withthe reflecting plate. According to the invention, the effect of realizing broadband performance in an extremely small space can be achieved.

The invention discloses a tunable decoupling network for a multi-antenna system, and the network comprises a tunable circuit and N-1 parasitic bodies, wherein N is equal to the number of antennas in the multi-antenna system, the tunable circuit is composed of N-1 tunable units, each tunable unit comprises three electronic devices, the three electronic devices are tunable capacitors or tunable inductors, one end of the first electronic device serves as a first connecting end of the tunable unit, the other end of the first electronic device, one end of the second electronic device and one end of the third electronic device are connected, and the connecting ends of the first electronic device, the second electronic device and the third electronic device serve as a second connecting end of the tunable unit; the other end of the second electronic device is a third connecting end of the tunable device, the other end of the third electronic device is grounded, the second connecting ends of the N-1 tunable units are connected with one ends of the N-1 parasitic bodies in a one-to-one correspondence manner, and every two adjacent antennas are correspondingly connected with the transmitter through one tunable unit; the advantages are that the miniaturized requirement is satisfied, and the decoupling bandwidth and the decoupling frequency are relatively wide.

The invention discloses a millimeter wave frequency quadrupler with a broadband high-fundamental-wave suppression double-balance self-mixing structure. The millimeter wave quadrupler comprises a third harmonic frequency multiplication unit, a double-balance ring type mixing unit and three transformers. An input signal is converted into a differential signal by the first-stage transformer, the differential signal is injected into the frequency multiplication unit, and one path of signal is divided as a local oscillator of the frequency mixing unit. And the frequency multiplication unit outputs a differential signal, and third harmonics are injected into a source electrode of the frequency mixing unit as intermediate frequency by a second-stage transformer in a differential-to-differential manner. And the frequency mixing unit mixes the fundamental wave and the third harmonic wave to generate a fourth harmonic wave, the fourth harmonic wave is led out by a drain electrode of the frequency mixing unit in a differential mode, and the third-stage transformer outputs the fourth harmonic wave by a differential-to-single end. According to the invention, the double-balance ring type frequency mixing unit is adopted, the unit has good inhibition degree on local oscillation and intermediate frequency leakage, a fundamental wave and third harmonic wave mixing scheme is adopted, the problem that the frequency tripler with the self-mixing structure generates fundamental frequency mixing products is solved, and the fundamental wave inhibition degree of the frequency tripler with the self-mixing structure is greatly improved.

The invention relates to an antenna for communication, which comprises a substrate, a top part antenna layer, a bottom antenna layer; the substrate is provided with a top surface and a bottom surfacein opposite to the top surface; the top part antenna layer is arranged on the top surface and comprises a first strip electrode, a second strip electrode and a third strip electrode which are introduced from the same node on the top surface and outwards dispersed; the bottom antenna layer is arranged on the bottom surface and connected with the top part antenna layer by crossing through a substrate through a coaxial feed point. Compared with a traditional multi-frequency terminal antenna, the antenna has better gain characteristic and realizes broadband property instead of point frequency; theantenna has smaller dimension, the structure is simple and easy to realize.