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.

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 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.

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.

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 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.

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.