48results about How to "Shorten electrical length" patented technology

A polyphase sequentially joined-segment coil of a rotary electric machine and a production method thereof are provided. The coil is made up of a plurality of conductor segments joined in series. Each of the conductor segments a head projecting from a stator core, a pair of legs, and a pair of ends projecting from the stator core. The heads are of two types: a large-sized head and a small-sized head extending inside the large-sized head. This structure permits the length of the conductor segments in an axial direction of the core to be decreased and improves cooling capability of the machine and coil losses.

A polyphase sequentially joined-segment coil of a rotary electric machine and a production method thereof are provided. The coil is made up of a plurality of conductor segments joined in series. Each of the conductor segments a head projecting from a stator core, a pair of legs, and a pair of ends projecting from the stator core. The heads are of two types: a large-sized head and a small-sized head extending inside the large-sized head. This structure permits the length of the conductor segments in an axial direction of the core to be decreased and improves cooling capability of the machine and coil losses.

A capacitive-power-feeding-type radiating electrode is provided on a dielectric substrate, and the dielectric substrate is provided in a non-ground region of a circuit board. In the non-ground region of the circuit board, a ground line electrically connecting the radiating electrode with a ground electrode of the circuit board is provided. The ground line is shaped so as to have at least one turnback portion. On the ground line, a resonant-frequency adjusting element is arranged so as to shortcut a portion of the ground line. The resonant-frequency adjusting element has a capacitance or inductance so as to adjust a resonant frequency of an antenna structure to a predetermined resonant frequency.

An apparatus including an antenna; a first part including a first ground plane portion; a second part including a second ground plane portion; a first electrical connection between the first part and the second part; and a second electrical connection between the first ground plane portion and the second ground plane portion that includes a reactive component.

A radiating conductor having first and second meandering portions and capacitive conductor portions is provided on a surface of a dielectric substrate perpendicularly provided on a grounding conductor plate. The first meandering portion and one of the capacitive conductor portions are locally opposed to each other to form a capacitive coupling portion. The first meandering portion receives high-frequency power through its bottom end. The second meandering portion is formed to have a smaller pitch than the first meandering portion, and continues to the upper end of the first meandering portion. One capacitive conductor portion formed on a front surface continues to the upper end of the second meandering portion, while the other capacitive conductor portion is formed on a back surface and connected with the former capacitive conductor portion via through holes.

An electrical connector includes a housing defining a front and a rear and a first group of contacts. The housing includes a rear base and a front mating tongue defining a first face and a second face opposite to the first face. The first group of contacts is held in the first face of the front mating tongue, the contacts include grounding contacts and signal contacts, each contact includes a retained portion retained in the housing, a contacting portion exposed upon the first face and a connecting leg. The contacting portions of the grounding contacts electrically connect with each other, the retained portions of the grounding contacts electrical connect with each other to reduce electrical length of the electrical connector.

An electric power tool, in particular an electric hammer, having a drive unit (11) contained in a housing (10), an impact mechanism (12), and a handle (13), including a cam (14) that is driven by the drive unit (11); the impact mechanism (12) has moving parts (15, 16).At least two of the moving parts (15, 16) are able to move inside a separate guide cylinder (17) that is stationary in relation to the moving parts (15, 16) and the cam (14).

An antenna includes a dielectric substrate disposed on a ground conductor and first and second radiating conductors containing meandering lines that are symmetrically disposed on a surface of the dielectric substrate and whose lower ends are connected at a junction. A third radiating conductor is disposed between the first radiating conductor and the second radiating conductor and extends in a straight line along the symmetry axis of both the radiating conductors. A capacitive conductor is disposed on the dielectric substrate and is substantially parallel to the ground conductor. The upper ends of the first, second and third radiating conductors are connected to the capacitive conductor. Power of a frequency supplied to the junction causes the first and second radiating conductors to resonate while power of a higher frequency causes the third radiating conductor to resonate.

A radio frequency amplifier circuit includes a transistor and an output-side matching circuit. The output-side matching circuit includes a first distributed constant line to which a radio frequency signal from the transistor is transmitted, a flat plate lead terminal transmitting the radio frequency signal from the first distributed constant line to an outside of the package, and a capacitive element having one electrode that is connected to the lead terminal and the other electrode that is grounded. A back surface of the lead terminal is joined to a resin substrate, and the capacitive element and the first distributed constant line are disposed adjacent to each other, with an alignment direction of the capacitive element and the first distributed constant line intersecting an alignment direction of the first distributed constant line and the lead terminal.

A small-sized optical transceiver module, wherein any stress attributable to the differences in coefficient of thermal expansion between a transmission section optical system, a receiving section optical system, and the components which integrate and fix them and the like is not applied therebetween, and which is not influenced by any stress at the time of attachment / detachment of the optical connector is disclosed. The optical transceiver module is one wherein the transmission section optical system 1 which comprises a laser diode and an optical fiber or an optical waveguide optically connected to the laser diode and of which the electric input terminal of the laser diode is a flexible cable, a receiving section optical system 2 which comprises a photo diode and an optical fiber or an optical waveguide optically connected to the photo diode and of which the electric output terminal of the photo diode is a flexible cable, and an optical I / O optical receptacle 3 are optically connected, mechanically integrated and fixed, and the two flexible cables are spatially spaced out and disposed.

An HF dipole antenna apparatus is provided which uses a coaxial cable for both a radiating element and a transmission line. Coiling the coaxial cable and adding a capacitive reactance to form a parallel resonant circuit with the coaxial cable coil achieves the transition between the radiation element and the transmission line. This antenna includes an upper radiating element. The addition of traps and parallel resonant circuits can be made to provide multi-frequency operation. An antenna coupling network can be added that provides appropriate reactance to allow both shortening the length of the dipole and provides a significantly wider range of operating frequencies.

A method and apparatus for a micromachine relay is provided. A pin controller comprises at least one spring pin designed to movably couple the pin controller to a device under test (DUT) to provide signals to the DUT. The pin controller further includes a micromachine relay coupled to the at least one spring pin to control the movement of the at least one spring pin and an integrated circuit for controlling the micromachine relay.

A communication system performs communication between a plurality of devices with different protocols in a vehicle. The communication system includes a plurality of GW units arranged in each of segments of the vehicle and capable of communicating with the plurality of devices with different protocols, and a trunk line connecting the segments with each other. Each of the GW units is connected to two or more devices with different protocols within the same segment, and includes a transmission determination unit and a transmission function unit. When a signal is input from the device being connected, the transmission determination unit determines a device or other gateway units to be a destination of transmission of information. The transmission function unit inputs information transmitted from the transmission determination unit of the other gateway units, and determines the device being a destination of transmission of the input information and transmits the information.

The invention discloses a signal transmission line, a duplexer, a multiplexer and communication equipment. The duplexer comprises an antenna, a transmitting filter, a receiving filter and an impedanceconverter, wherein the transmitting filter and the receiving filter are formed on the basis of acoustic resonators, and the impedance converter is the signal transmission line. The head end of a first metal signal line layer of the signal transmission line is connected with the antenna, and the tail end of the second metal signal line layer of the signal transmission line is connected with the antenna end of the receiving filter or the transmitting filter. According to the technical scheme, the signal transmission line has high characteristic impedance, impedance conversion is achieved in theduplexer design, meanwhile, the electrical length of the needed transmission line is shortened, the space occupied by the transmission line is reduced, and miniaturization design of devices is facilitated. In addition, an electromagnetic coupling path exists between the signal transmission line and a coupling unit in the receiving filter and / or the transmitting filter, and the out-of-band rejection characteristic and the isolation characteristic of the corresponding frequency band can be improved by adjusting the coupling mode and the coupling strength of the electromagnetic coupling path.

An aircraft landing gear comprising an axle (3) intended to receive a wheel (4) comprising a rim (6) mounted to rotate on the axle (3) by means of at least one rolling bearing (8). The rolling bearing (8) comprises an inner ring (11) mounted around the axle (3) and an outer ring (12) rotationally secured to the rim (6) of the wheel (4). The landing gear further comprising a measurement device (21) intended to perform measurements of at least one operating parameter of the landing gear. The measurement device (21) is incorporated in the rolling bearing (8) by being secured to one of the inner or outer rings of the rolling bearing (8).

The invention provides a watchband antenna for a wearable wireless system, including a watchband and a feed device arranged on the watchband. The watchband is made of a metallic material and is provided with at least one gap. The feed device includes a microstrip dielectric substrate, a metal ground disposed on the microstrip dielectric substrate, and a feed probe. The feed probe penetrates the metal ground and the microstrip dielectric substrate and is inserted into and connected in the gap in the watchband. The watchband antenna is easy to install, solid in structure, low in price, light in weight and small in size, and reduces the burden on users. With the watchband antenna structure, the antenna radiation is achieved, and the selection range of the wearable wireless system antenna is expanded.

An oscillator, a dielectric waveguide device and a transmitter incorporating the same, wherein a special temperature-compensating circuit provides a temperature-compensated device with reduced size and cost, and greater productivity. In the oscillator, a dielectric plate having a strip line of a specified length is arranged between conductive plates which enclose a Gunn diode. The oscillation output signal of the Gunn diode is extracted via the strip line. In addition, the sign of the dielectric-constant temperature coefficient of the dielectric plate is set such that changes in the oscillation frequency caused by changes in temperature of the Gunn diode are suppressed.

The invention discloses an electric connector, which comprises a body, a signal terminal and at least one grounding terminal, wherein the body is provided with a butting surface and sinks downward from the butting surface to form an inserting slot used for accommodating a butting element, the inserting slot is provided with a slot bottom surface, the body is provided with two side walls respectively located at two sides of the inserting slot, at least one side wall includes a first portion formed by insulation plastic and a second portion arranged on the first portion, the first portion is provided with a signal terminal hole, the second portion is made of conductive plastic and provided with a plurality of grounding terminal holes, the signal terminal hole and the grounding terminal holesare communicated with the inserting slot, and the grounding terminal holes at least partially exceed the slot bottom surface upward; the signal terminal is correspondingly accommodated in the signalterminal hole; the at least one grounding terminal is correspondingly accommodated in the at least one grounding terminal hole and connected with the second portion in a conductive manner; and both the signal terminal and the grounding terminal are provided with a contact portion, the contact portion protrudes into the inserting slot so as to be electrically connected with the butting element. Theelectrical length of the grounding terminal is changed through the second portion made of the conductive plastic to improve the high frequency performance.

The invention discloses a miniaturization coupler capable of adjusting coupling coefficients and belongs to the field of radio frequency couplers. The coupler comprises an upper layer micro belt structure, a middle layer medium base plate and lower layer grounding metal. The upper layer micro belt structure, the middle layer medium base plate and the lower layer grounding metal are up-down successively arranged. The upper layer micro belt structure comprises two mutually parallel first transmission lines and two mutually parallel second transmission lines and is symmetrical with respect to themiddle line of the two first transmission lines. The second transmission lines are arranged on two sides of the middle line of the first transmission lines. Two ends of each second transmission lineare vertically connected with the first transmission lines. Middle points of the second transmission lines are connected with one end of an adjustable electrical susceptance structure through isolation capacitors. According to the invention, the coupler is capable of adjusting coupling coefficients through the adjustable electrical susceptance structure, and by use of serially connected inductors,equivalent micro belt lines are formed, so the electrical length of the micro belt lines is reduced and the effect of achieving miniaturization is achieved.

A broadband bicone antenna supports frequency selective control of electrical length. Frequency selective control of the electrical length of an antenna can provide an antenna exhibiting two or more different electrical lengths where use of each length depends upon the operating frequencies of the signals. The electrical length of the bicone antenna may be reduced in response to higher operating frequencies. Such reduction in electrical length at higher frequencies can provide improved antenna radiation patterns for the antenna. Further, the electrical length of the bicone antenna may be increased in response to low frequency operation. Such increase in electrical length may improve VSWR performance at lower frequencies. Simultaneous operation of the bicone antenna at varied electrical lengths for varied frequency bands can provide improved broadband performance of the antenna.

A probe module includes a base adapted to be fixed to a tester, an engaging seat engaged with the base, a signal connector, an electrical signal transmitting member, and two probes located below the engaging seat. The engaging seat has an engaging opening and a first end surface. The signal connector is provided in the engaging opening, and has a signal conductive portion and a conductive ground. A signal wire and a ground layer of the electrical signal transmitting member are electrically connected to the signal conductive portion and the conductive ground, respectively. The probes are electrically connected to the signal wire and the ground layer, respectively. The probes extend out of a first extending reference plane of the first end surface. Alternatively, a reflector is used to reflect an image of the probes upward. Whereby, a length of the electrical signal transmitting member can be further shortened.

A stator for an electrical rotating machine includes a laminated core having coil bars and a winding head board resting on an end side of the laminated core and having a main body including a first dielectric material. Conductor tracks are connected to the coil bars and integrated into the winding head board. The winding head board has a region with a second dielectric material and / or a region with a third dielectric material, with the second dielectric material having a higher thermal conductivity than the first dielectric material. The region with the second dielectric material is arranged between a conductor track and the laminated core such that heat is transmittable between conductor track and laminated core via the second dielectric material. The third dielectric material has a higher dielectric strength than the first dielectric material, with the region with the third dielectric material arranged between at least two conductor tracks.

A dual broadband and multiband antenna system of reduced dimension is preferably an external antenna adapted for vehicles. The antenna system comprises first and second radiating elements and a common ground plane for the first and second radiating elements. The ground plane comprises at least three planes, wherein a first and a second planes are parallel to each other, and wherein a third plane is connected with the first and second planes and it is orthogonally arranged with respect to the first and second planes. The first and second planes extend from the third plane in opposite directions so as to define generally a Z shape in a cross-sectional view. The antenna system is preferably adapted to operate on the LTE communication network.

An electrical connector (100) for an electrical card includes an insulating housing (20) defining a receiving slot (220) for mating and a number of electrical contacts (60). Each of the electrical contacts has a securing portion for securing the contact in the housing, a contacting portion (66) extending into the receiving slot and a flexible connecting portion (64) connecting the securing portion and the contacting portion. The insulating housing forms a stop portion (226) flexibly biased by said connecting portion when said electrical card is not mated therein.

A broadband bicone antenna supports frequency selective control of electrical length. Frequency selective control of the electrical length of an antenna can provide an antenna exhibiting two or more different electrical lengths where use of each length depends upon the operating frequencies of the signals. The electrical length of the bicone antenna may be reduced in response to higher operating frequencies. Such reduction in electrical length at higher frequencies can provide improved antenna radiation patterns for the antenna. Further, the electrical length of the bicone antenna may be increased in response to low frequency operation. Such increase in electrical length may improve VSWR performance at lower frequencies. Simultaneous operation of the bicone antenna at varied electrical lengths for varied frequency bands can provide improved broadband performance of the antenna.

An electrical connector (100) for an electrical card includes an insulating housing (20) defining a receiving slot (220) for mating and a number of electrical contacts (60). Each of the electrical contacts has a securing portion for securing the contact in the housing, a contacting portion (66) extending into the receiving slot and a flexible connecting portion (64) connecting the securing portion and the contacting portion. The insulating housing forms a stop portion (226) flexibly biased by said connecting portion when said electrical card is not mated therein.