31results about How to "Adjust impedance" patented technology

A circuit board design is disclosed that is useful in high-speed differential signal applications uses either a via arrangement or a circuit trace exit structure. A pair of differential signal vias in a circuit board are surrounded by an opening that is formed within a ground plane disposed on another layer of the circuit board. The vias are connected to traces on the circuit board by way of an exit structure that includes two flag portions and associated angled portions that connect the flag portions to circuit board traces. In an alternate embodiment, the circuit board traces that leave the differential signal vias are disposed in one layer of the circuit board above a wide ground strip disposed on another layer of the circuit board in a triangular pattern when viewed in section.

The invention discloses a multi-band tunable broadband wave absorber based on AFSS, which comprises a first active frequency selective surface layer, a first foam layer, a second active frequency selective surface layer, a second foam layer and a metal backboard layer from left to right, the dual-layer active frequency selective surface is adopted, and compared with a single-layer frequency selective surface, multi-frequency-band broadband tunable wave absorption of a target frequency band can be achieved; 2) an active frequency selective surface metal unit adopts a unit consisting of an upper arrow and a lower arrow which are opposite in direction, a gap is formed between the arrow parts of two adjacent units, a diode is welded between the gaps for connection, and the result can be obtained by analyzing the surface current of the wave absorber structure. The surface current is mainly distributed on the metal unit sheet and is collected to the arrow top end of the double-arrow structure, and the diode loaded in the gap of the arrow top end converts the energy of incident electromagnetic waves into heat energy through ohmic loss, so that the loss of the electromagnetic waves is improved, and the absorption bandwidth of the wave absorber is expanded.

The embodiment of the present invention discloses a protective casing for use with a communication terminal; the communication terminal includes a metal backboard and a metal frame, and a gap is provided between the metal backboard and the metal frame; the metal frame corresponding to the metal gap The area is provided with a first radiation area; the first radiation area can work in the WiFi frequency band to form the first WiFi antenna, or work in the GPS frequency band of the Global Positioning System to form a GPS antenna; the protective shell at least includes: a protective cover and a protective cover installed on the protective cover The metal body on the top; the protective cover is made of an insulating medium; the metal body is coupled or short-circuited with the first WiFi antenna to form a second WiFi antenna. The metal body and the first WiFi antenna in the communication terminal share the second WiFi antenna. The second WiFi antenna introduces a metal body on the basis of the first WiFi antenna, which broadens the working WiFi frequency band or adjusts the impedance of the original WiFi antenna. Better impedance matching is achieved.

The application provides a multi-loudspeaker assembly impedance dynamic adjusting circuit comprising a multi-loudspeaker assembly, a switch element assembly and a control unit; the multi-loudspeaker assembly comprises two or more loudspeakers with the same electroacoustic parameters; the switch element assembly comprises a plurality of switch elements, wherein switch levels of each switch element are respectively connected between the loudspeakers and power amplifiers and between anodes and cathodes of different loudspeakers; the control unit can connect or disconnect the switch elements according to set control logic; the switch elements are connected or disconnected so as to connect / disconnect the connected loudspeakers with / from power amplifiers, and series and parallel connection combinations between the loudspeakers can be controlled, thus adjusting the multi-loudspeaker assembly impedance. The adjusting circuit can dynamically adjust the multi-loudspeaker assembly load impedance, thus allowing the power amplifiers and sound units to work in the maximum performance as possible, and improving the expressive force of the maximum and minimum volumes.

An omnidirectional radiation oscillator array antenna for coupling feed relates to a printing antenna and resolves the problem that the existing omnidirectional antenna is narrow in bandwidth, low in gain, poor in omnidirectional performance in working band and larger in size. The antenna comprises a media plate and a coplanar waveguide center feeder. The antenna further comprises a feed port matching branch knot, radiation type terminal load and two groups of oscillators. The coplanar waveguide center feeder, the feed port matching branch knot, the radiation type terminal load and the two groups of oscillators are printed on the front plate face of the media plate, the lower end of the coplanar waveguide center feeder is connected with the feed port matching branch knot, and the upper end of the coplanar waveguide center feeder is connected with the radiation type terminal load. Each group of vibrators comprise a first vibrator and a second vibrator which are rectangular, the two groups of vibrators are symmetrically arranged along the coplanar waveguide center feeder, and a first horizontal feeder and a second horizontal feeder are printed on the back plate face of the media plate. The antenna is used for the technical field of radio engineering.

Disclosed is a connector wherein a receptacle is provided with: a receptacle main body, which is formed of an insulating resin, and which is provided with a fitting protruding section that protrudes from a plug-side front end surface portion of a main body section, said fitting protruding section being to be inserted into a fitting recessed section opened in the front surface of a plug; and a plurality of receptacle contacts, each of which has a contact section thereof exposed on a fitting protruding section surface portion on one side, said contact section being disposed in the connecting direction. On the plug-side front end surface portion of the fitting protruding section, a plug-reinforcing section formed by covering the plug-side front end surface with a reinforcing plate section formed of a metal plate, and an insulating protecting section, which is formed by exposing the plug-side front end surface of the fitting protruding section corresponding to the position of a desired receptacle contact, are formed. Consequently, deformation and damages of the fitting protruding section are eliminated when the plug is diagonally inserted into the receptacle, the connector is applicable to various kinds of plugs, and short-circuits due to having a plug contact in contact with the metallic reinforcing member can be eliminated.

The invention discloses a tilted elliptical monopole broadband circular polarized antenna, which comprises a dielectric substrate, a back surface of the dielectric substrate is printed with a floor with an arc edge, a front surface of the dielectric substrate is printed with a bent feeder and an elliptical monopole, the elliptical monopole is connected with the bent feeder and the connection point of which is close to one side edge of the dielectric substrate, and the elliptical monopole is inclined to the vertical center line of the dielectric substrate. The circular polarized antenna has the advantages of simple structure, easy manufacture, wide band, small size and easy adjustment.

The invention provides a tuning assembly and an NFC device. The tuning assembly comprises a control module and a compensation module. The compensation module comprises at least two compensation units; the compensation units are used for being connected to an antenna matching circuit of the NFC device in parallel; and the control module controls the opening and closing states of the at least two compensation units according to a preset logic so as to adjust the impedance of a combination of the antenna matching circuit and the compensation module. According to the configuration, the control module can adjust the impedance of the combination of the antenna matching circuit and the compensation modules in real time by controlling the opening and closing states of the at least two compensation modules, so that antenna detuning caused by various reasons can be compensated, and the communication performance of the NFC device is ensured.

The invention provides a touch panel, comprising a plurality of first electrodes, a plurality of second electrodes, and a dielectric layer arranged between the first electrodes and the second electrodes, wherein the first electrodes and the second electrodes are intersected to form a plurality of interlaced areas. Each second electrode is at least provided with a plurality of open holes corresponding to each interlaced area, and the open holes expose part of the first electrodes.

The invention relates to a foldable mobile terminal, an antenna control method and a readable storage medium. The foldable mobile terminal foldable mobile terminal comprises a first screen module and a second screen module; the foldable mobile terminal further comprises an antenna module; the antenna module is arranged on the first screen module; and the antenna module comprises an antenna and a matching circuit. According to the foldable mobile terminal, the tuning parameter of the antenna is adjusted through the matching circuit according to the working state information of the foldable mobile terminal, so that the impedance corresponding to the antenna can be adjusted, and therefore on the premise that the performance of the antenna is guaranteed, the number of antennas is reduced, the antenna space is saved, and the influence of an antenna clearance area on a mainboard swing piece is reduced.

Provided is an optical waveguide element module which suppresses reflection of a modulation signal and attenuation of a modulation signal, even when an impedance of a modulation electrode of an optical waveguide element and an impedance of a transmission line for inputting the modulation signal from the external of the optical waveguide element are different from each other. The optical waveguide element module is provided with an optical waveguide element, which has a substrate (1) composed of a material having electro-optical effects, an optical waveguide (2) formed on the substrate, and a modulation electrode (3) which modules optical waves propagating in the optical waveguide; a connector (8), wherein an external signal line which inputs the modulation signal to the modulation electrode is connected to the modulation electrode; and a relay line which connects the connector and the modulation electrode and is formed on a relay substrate (7). Impedance of the relay line changes stepwise or continuously, and reflection of the modulation signal in the optical waveguide element module is suppressed.

The invention provides a magnetic resonance type isolator, which can realize miniaturization and adjust input and output. The magnetic resonance type isolator includes a ferrite (10); a connection conductor (15) that is arranged on the ferrite and includes first, second and third ports (P1, P2, P3); a permanent magnet that applies a direct current magnetic field to the ferrite (10); a capacitor (C1) (or an inductor) that defines a first reactance element; and a capacitor (C2) (or an inductor) that defines a second reactance element. A main line arranged between the first port (P1) and the second port (P2) of the connection conductor (15) does not resonate, an end portion of a sub-line that branches off from the main line serves as the third port (P3), and a wave reflected from the sub-line is modulated so that its phase is shifted by 90 DEG or about 90 DEG at an intersection of the connection conductor (15). One of the capacitors (C1) is connected to the third port and the other capacitor (C2) is connected between the first port and the second port.

The invention discloses an RFID ultra-high frequency Inlay applied in 860-960 MHz, comprising an RFID chip, an inductor coil, a bent body A, a radiator A, a bent body B, a radiator B and a PET substrate. The Inlay of the invention has high sensitivity in the frequency range of 860MHz to 960MHz for the industries of logistics, clothing, footwear, pharmaceuticals and the like. -13dbm - -16dbm, and arelatively long reading distance of 7m to 10m, strong anti-jamming ability to surrounding environment and material, Can be easily packaged as labels, hangtag and other forms of carrier, suitable forlogistics, clothing, footwear, pharmaceuticals and other large-scale applications, but also for label size miniaturization requirements of the industry, in the same peripheral size products have goodperformance (sensitivity and read distance).

The invention discloses an antenna tuner which structurally comprises an antenna device, a wiring terminal, a fixed sheet, a protective shell, a signal adjusting terminal and a circuit groove box. When a device is used, a frequency raiser mechanism is arranged. In the working process of the antenna tuner, for a surrounding-variable environment, when the frequency of a transmitter is changed, the impedance between the transmitter and the antenna is not matched, the radiation power is reduced, the operation is troublesome, fine adjustment is difficult to perform, the frequent mismatch of the antenna is caused, and the structure of the antenna cannot be frequently changed, the above problems are solved by the invention, the equipment is matched with a bearing frame through a linkage swing rod; the limitation of a traditional antenna fixing mode is broken through, meanwhile, an auxiliary supporting scheme is provided for signals of an antenna mast, the coverage points of the frequency raiser can be flexibly increased through signal strips, the impedance between the transmitter and the antenna is effectively adjusted, and the signal feedback is efficiently matched and more convenient.

The invention discloses a voltage-reduction regulation circuit. The voltage-reduction regulation circuit comprises a switch tube, a feedback module and a regulation module. The first end of the switchtube is used as an input voltage end, the second end of the switch tube is used as an output voltage end, the first end of the feedback module is connected with the second end of the switch tube, thesecond end of the feedback module is connected with the first end of the regulation module, and the second end of the regulation module is connected with the driving end of the switch tube. Accordingto the voltage-reduction regulation circuit, the output voltage is processed by the feedback module to obtain the feedback voltage so as to realize effective control when the output voltage is too high or too low, and the voltage at the driving end of the switch tube is adjusted by the feedback voltage and the quasi-level voltage so as to adjust the impedance of the switch tube so as to realize voltage-reduction adjustment of any pressure difference, and the voltage-reduction regulation circuit has the advantages of simple structure, high reliability, good stability and the like.

The invention provides an electric connector and a terminal thereof. The electric connector includes an insulation body and the terminal; the insulation body is provided with a fixation hole; and thefixation hole is provided with a first inner side wall and a second inner side wall opposite to the first inner side wall. The terminal includes a contact portion, a fixation portion and a connectionportion, the contact portion and the connection portion separately extend from the fixation portion and are exposed to the insulation body, the fixation portion is provided with a first side surface and a second side surface opposite to the first side surface, the fixation portion is provided with a through hole, the fixation portion is fixed in the fixation hole, the through hole is located in the fixation hole, the first side surface orients to the first inner side wall and is separated from the first inner side wall by first spacing, and the second side surface orients to the second inner side wall and is spaced apart from the second inner side wall by second spacing. The structural design makes impedance of the electric connector easy to adjust, and helps to reduce the cost and time course of development of the electric connector.

The invention relates to a monopole antenna for an embedded system. The monopole antenna is integrated on a circuit substrate of the embedded system. The invention includes a feed-in wire which is arranged on the circuit substrate and is used for transmitting an feed-in signal, a trapezoid radiation component which is arranged on the circuit substrate and is connected with the feed-in wire for radiating a RF signal corresponding to the feed-in signal, and a grounding component which is arranged surround the trapezoid radiation component so as to provide a grounding route of the feed-in signal.

The invention discloses a multi-band tunable broadband wave absorber based on AFSS. From left to right, it includes a first layer of active frequency selective surface, a first layer of foam layer, a second layer of active frequency selective surface, and a second layer of active frequency selective surface. Two layers of foam layer and metal backboard layer; the present invention adopts a double-layer active frequency selective surface, which can realize target frequency band multi-band broadband tunable absorbing compared with single-layer frequency selective surface. 2) The active frequency selective surface metal unit in the present invention adopts a unit composed of two arrows in opposite directions up and down, and there is a gap between the arrow parts of two adjacent units, and a diode is welded between the gaps to connect, through The analysis of the surface current of the absorber structure shows that the surface current is mainly distributed on the metal unit sheet, and the surface current is collected at the top of the arrow in the double arrow structure, and the diodes loaded in the gaps at the top of the arrow reduce the incident electromagnetic wave through ohmic loss. The energy is converted into heat energy, which increases the loss of electromagnetic waves, thereby expanding the absorption bandwidth of the absorber.

The invention discloses a wafer supporting seat, which comprises a supporting disc, a first connecting part and a second connecting part, the shaft is provided with a top end and a second connecting part located at the top end, and the second connecting part is detachably connected with the first connecting part, so that the top end of the shaft is detachably connected to the bottom of the supporting disc; and the insulating medium sheet is clamped between the first connecting part of the supporting disc and the second connecting part of the shaft, so that a capacitor in the electrode loop is formed. In addition, the invention also discloses a process cavity.

The invention relates to the technical field of communication, particularly to a multi-frequency antenna and communication equipment comprising the same. The multi-frequency antenna comprises a dielectric substrate, wherein a grounding plate is arranged on the surface of one side of the dielectric substrate, a high-frequency radiation unit and a low-frequency radiation unit are arranged on the surface of the other side of the dielectric substrate, the high-frequency radiation unit comprises a circular first resonance body and a plurality of rectangular grooves formed in the first resonance body, and the low-frequency radiation unit comprises disturbance branches connected to the edge of the first resonance body and a conductor used for connecting the two disturbance branches. According tothe multi-frequency antenna, the impedance of the antenna can be adjusted by forming the rectangular groove in the circular first resonance body so as to form the high-frequency part of the antenna, and the disturbance branches are connected together by using the conductor structure so as to form the low-frequency part of the antenna, so that the coverage of multiple frequency bands is realized, and the overall structure of the product is flat-plate-shaped so as to achieve the small occupied space.

The invention discloses an electrical connector, comprising: an insulating body, having a butt joint surface, a slot recessed from the butt joint face, and two side walls located on both sides of the slot, forming a bottom surface of the slot in the recess direction of the slot, One of the side walls is provided with at least one grounding receiving groove and at least one signal receiving groove; a plurality of terminals are arranged on at least one side wall, and the terminals have contact parts protruding into the slots, and the plurality of terminals include at least one signal terminal and at least one grounding Terminals, signal terminals are correspondingly stored in the signal storage slot, ground terminals are correspondingly stored in the ground storage slot; the insulating plug is installed in the insulating body, and the same side of the insulating plug is provided with a first part corresponding to the signal storage slot and corresponding to the ground storage slot. The second part, the first part is accommodated in the signal receiving groove and is closer to the mating surface than the second part and the bottom surface of the groove. In this way, the dielectric constant around the signal terminals can be increased, and the impedance of the signal terminals can be adjusted, which is beneficial to the transmission of high-frequency signals.

The invention discloses a voltage-reduction regulation circuit. The voltage-reduction regulation circuit comprises a switch tube, a feedback module and a regulation module. The first end of the switchtube is used as an input voltage end, the second end of the switch tube is used as an output voltage end, the first end of the feedback module is connected with the second end of the switch tube, thesecond end of the feedback module is connected with the first end of the regulation module, and the second end of the regulation module is connected with the driving end of the switch tube. Accordingto the voltage-reduction regulation circuit, the output voltage is processed by the feedback module to obtain the feedback voltage so as to realize effective control when the output voltage is too high or too low, and the voltage at the driving end of the switch tube is adjusted by the feedback voltage and the quasi-level voltage so as to adjust the impedance of the switch tube so as to realize voltage-reduction adjustment of any pressure difference, and the voltage-reduction regulation circuit has the advantages of simple structure, high reliability, good stability and the like.

The invention provides an electric connector and a terminal thereof. The electric connector includes an insulation body and the terminal; the insulation body is provided with a fixation hole; and thefixation hole is provided with a first inner side wall and a second inner side wall opposite to the first inner side wall. The terminal includes a contact portion, a fixation portion and a connectionportion, the contact portion and the connection portion separately extend from the fixation portion and are exposed to the insulation body, the fixation portion is provided with a first side surface and a second side surface opposite to the first side surface, the fixation portion is provided with a through hole, the fixation portion is fixed in the fixation hole, the through hole is located in the fixation hole, the first side surface orients to the first inner side wall and is separated from the first inner side wall by first spacing, and the second side surface orients to the second inner side wall and is spaced apart from the second inner side wall by second spacing. The structural design makes impedance of the electric connector easy to adjust, and helps to reduce the cost and time course of development of the electric connector.

The invention provides an implementation method and device for finely and rapidly adjusting impedance of a transformer, and relates to the technical field of power systems and electronics. The device for finely and rapidly adjusting the impedance of the transformer comprises a control system and a transmission mechanism, and the transmission mechanism comprises a servo motor, a movable ferromagnetic shunt, a limiting guide rod and a transmission belt wheel. According to the implementation method and device for finely and rapidly adjusting the impedance of the transformer, the impedance value of the analog transformer can be set through a human-computer interface, a PLC automatically drives a servo motor according to preset programming, and the impedance value of the analog transformer can be accurately adjusted. And the lap joint area of the movable ferromagnetic shunt and the main iron core of the analog transformer is adjusted, and calculation and verification are automatically completed, so that the impedance of the analog transformer is finely and quickly adjusted to reach a set value, the adjustment accuracy is high, and time is saved.

Disclosed is a connector wherein a receptacle is provided with: a receptacle main body, which is formed of an insulating resin, and which is provided with a fitting protruding section that protrudes from a plug-side front end surface portion of a main body section, said fitting protruding section being to be inserted into a fitting recessed section opened in the front surface of a plug; and a plurality of receptacle contacts, each of which has a contact section thereof exposed on a fitting protruding section surface portion on one side, said contact section being disposed in the connecting direction. On the plug-side front end surface portion of the fitting protruding section, a plug-reinforcing section formed by covering the plug-side front end surface with a reinforcing plate section formed of a metal plate, and an insulating protecting section, which is formed by exposing the plug-side front end surface of the fitting protruding section corresponding to the position of a desired receptacle contact, are formed. Consequently, deformation and damages of the fitting protruding section are eliminated when the plug is diagonally inserted into the receptacle, the connector is applicable to various kinds of plugs, and short-circuits due to having a plug contact in contact with the metallic reinforcing member can be eliminated.

An embodiment of the invention discloses an electromagnetic voltage-regulator with a single-phase voltage regulating mechanism. The single-phase voltage regulating mechanism is one of an A-phase voltage regulating mechanism, a B-phase voltage regulating mechanism and a C-phase voltage regulating mechanism which are the same in structure, and comprises a first iron core, a second iron core, a first induction winding, a first high-voltage winding, a second sending winding, a second high-voltage winding, a third induction winding, a third high-voltage winding, a fourth induction winding and a fourth high-voltage winding. The first iron core and the second iron core are in parallel mutually, the first induction winding, the first high-voltage winding, the second induction winding and the second high-voltage winding are wound on the first iron core, and the third induction winding, the third high-voltage winding, the fourth induction winding and the fourth high-voltage winding are wound on the second iron core. The electromagnetic voltage-regulator has the advantages of safety, high reliability and low cost.

A coaxial cable connector which improves pressing strength on coaxial cables and regualtes the impedance of the coaxial cables includes: a terminal, a shell supporting the terminal, and an outer conductor shell covers at least one parts of both the shell and the coaxial cable. The outer conductor shell has at least one concave part and at least one convex part in a plane that is basically orthorhombic to the coaxial cable, a contact surface with the coaxial cable, and / or the contact surface in the axial direction of the coaxial cable.

The invention is directed to the field of dye sensitization solar energy cell production technology and particularly relates to a vacuum automatic packaging method used for a dye sensitization solar energy cell. According to the method, a screen printing method is adopted to prepare a TiO2 film, automatic gluing equipment is employed to form a required figure and a procuring is carried out, electrolyte is dripped into the figure formed by the packaging glue with an automatic dripping apparatus, leveling and stitching are carried out in a vacuum atmosphere and finally the packaging process of the cell is completed. The invention is characterized by simple technology, high controllability on technological parameter, short packaging time, good packaging reliability and high yield. The thickness of the cell and the amount of electrolyte are controlled through doping a cushion in the liquid state glue and the working electrode and the counter electrode are separated. The invention can be used for the packaging of a high efficiency large acreage dye sensitization solar energy cell.

An embodiment of the invention discloses an electromagnetic voltage-regulator with a single-phase voltage regulating mechanism. The single-phase voltage regulating mechanism is one of an A-phase voltage regulating mechanism, a B-phase voltage regulating mechanism and a C-phase voltage regulating mechanism which are the same in structure, and comprises a first iron core, a second iron core, a first induction winding, a first high-voltage winding, a second sending winding, a second high-voltage winding, a third induction winding, a third high-voltage winding, a fourth induction winding and a fourth high-voltage winding. The first iron core and the second iron core are in parallel mutually, the first induction winding, the first high-voltage winding, the second induction winding and the second high-voltage winding are wound on the first iron core, and the third induction winding, the third high-voltage winding, the fourth induction winding and the fourth high-voltage winding are wound on the second iron core. The electromagnetic voltage-regulator has the advantages of safety, high reliability and low cost.