104results about How to "Increase electrical length" patented technology

An atomizer and an electronic cigarette are provided. The atomizer includes: an atomizer cartridge; a liquid storage area arranged inside the atomizer cartridge; an electric heating element coiled spirally to form a plate-shape structure; and a first liquid guide cloth. The first liquid guide cloth is arranged covering an opening of the liquid storage area, and the electric heating element is laid on a side of the first liquid guide cloth away from the liquid storage area. With the first liquid guide cloth, the quantity of the cigarette liquid transferred to the electric heating element is ensured to be equable. The electric heating element is arranged along the transverse direction of the atomizer, thereby avoiding conventional problems of non-uniform smoke volume and burning-out of the liquid storage cotton due to gravity or vibration of the spiral coils.

The invention relates to an internal multiband antenna intended for small-sized radio devices, and a radio device with such an antenna. The basic structure of the antenna is a two-band PIFA. A parasitic element (230) is added to it inside the outline of the radiating plane (220) of the PIFA, e.g. in the space (229) between the conductor branches (221, 222) of the radiating plane. The parasitic element extends close to the feeding point (FP) of the antenna, from which place it is connected to the ground plane of the antenna with its own short-circuit conductor (235). The structure is dimensioned so that the resonance frequency based on the parasitic element comes close to the one resonance frequency of the PIFA, thus widening the corresponding operating band, or a separate third operating band is formed for the antenna with the parasitic element. Because the parasitic element is located in the central area of the radiating plane and not in its peripheral area, the radio device user's hand does not significantly impair the matching of the antenna on an operating band which has been formed by the parasitic element. In addition, when the resonance frequency based on the parasitic element is on the upper operating band, the matching of the antenna also improves on the lower operating band.

An electrical interconnection system with high speed, differential electrical connectors. The connector is assembled from wafers each containing a column of conductive elements, some of which form differential pairs. Skew control is provided for at least some of the pairs by providing a profile on an edge of the shorter signal conductor of the pair. The profile may contain multiple curved segments that effectively lengthen the signal conductor without significantly impacting its impedance. For connectors in which ground conductors are included between adjacent pairs of signal conductors, patterned segments of varying parameters may be included on edges of the signal conductors and ground conductors to equalize electrical lengths of all edges in a set of edges for which there is common mode or differential mode coupling as a signal propagates along each pair. Such features for skew control may be used in combination with other skew control features. The features used may vary depending on the location of the pair within the column.

The invention relates to a multiband antenna structure suitable for mobile stations in particular. The radiating elements of the antenna include not only a helix (210) but also the joining piece (220) that attaches the helix to the apparatus. The helix is shaped such that the distance between its conductor turns varies. The electrical length of the joining piece is increased e.g. by means of a conductive projection (226) that remains within the covering of the apparatus. By suitably dimensioning the parts, at least five of the resonances that the helix and joining piece have together and separately are arranged at useful points on the frequency scale. The structure according to the invention is despite the several bands simple and relatively low in production costs.

The present invention relates to an antenna arrangement, an adaptive system comprising such arrangement, a portable electronic device comprising such arrangement or adaptive system, a method of manufacturing such an arrangement, and a computer-readable storage medium encoded with instructions for performing such method. The antenna arrangement can comprise at least one antenna element (110) configured to supply a current, at least one ground plane element (120) configured to conduct the current, and at least one magnetic element (130) configured to influence at least a part of the current in order to modify an electrical length of the at least one ground plane element (120). It enables to increase the electrical length of a terminal chassis, which may increase the operation bandwidth of the antenna-chassis combination. This effect can be further increased when combining at least one slot and at least one magnetic element covering the same at least partially.

An antenna structure includes a capacitance-rendering portion located between an open end portion of a feed radiation electrode and a ground portion. A switch for changing the capacitance between the open end portion of the feed radiation electrode and the ground portion rendered by the capacitance-rendering portion is provided. When the capacitance between the open end portion of the feed radiation electrode and the ground portion is increased by the capacitance-rendering portion, a resonant frequency in the fundamental frequency band, caused by the antenna operation of the feed radiation electrode, is reduced corresponding to the increased amount of the capacitance. When the capacitance between the open end portion of the feed radiation electrode and the ground portion is decreased by the changing operation of the capacitance-rendering portion, the resonant frequency in the fundamental frequency band is increased corresponding to the decreased amount of the capacitance.

A wireless IC device includes a wireless IC chip, a coupling electrode, and a radiation plate. The coupling electrode includes coupling portions arranged to be coupled to the wireless IC chip and a pair of opposing ends. The pair of opposing ends are capacitively coupled to each other and oppose the radiation plate to be coupled to the radiation plate. The wireless IC chip uses the radiation plate as an antenna to transmit and receive signals having certain frequencies to and from an RFID system.

The invention discloses a base station antenna that is applied to an international mobile telecommunication-advanced (IMT-Advanced) system of a fourth generation wireless mobile communication system. The antenna unit employs a mode of multi-layer microstrip paster antenna and a basic structure of the antenna comprises a metal reflecting plate, a microstrip feeding layer, two radiating layers and a plurality of nylon insulating columns. The greatest innovation of the invention lies in an ultrabroad band characteristic of the antenna; a novel arrowhead coupling feeding groove and a double-layer radiation patch are employed; and a bandwidth can reach 49.5% on the condition that a standing-wave ratio is less than 1.5. On the basis of a reasonable design of a reflecting plate, a half-power lobe width of the antenna is a value caused by adding 6 degrees to 65 degrees or by subtracting 6 degrees from 65 degrees in a whole working frequency band range; and a convergence degree of a wave beam of the antenna has a good performance. According to the invention, a corner feeding mode is employed to carry out feeding and a dual polarization with plus / minus 45 degrees is realized on the condition that it is avoided that a radiation patch is rotated by 45 degrees, so that it is beneficial to reduce a whole length of an antenna array after arrangement of the array. On the basis of the basic structure that is based on the technical scheme of the invention, other concrete embodiments of the invention can be constructed only by reasonably changing a size of a radiation patch, a shape of a slotted floor and spaces between all layers.

The invention relates to an internal multiband antenna intended for small-sized radio devices, and a radio device with such an antenna. The basic structure of the antenna is a two-band PIFA. A parasitic element (230) is added to it inside the outline of the radiating plane (220) of the PIFA, e.g. in the space (229) between the conductor branches (221, 222) of the radiating plane. The parasitic element extends close to the feeding point (FP) of the antenna, from which place it is connected to the ground plane of the antenna with its own short-circuit conductor (235). The structure is dimensioned so that the resonance frequency based on the parasitic element comes close to the one resonance frequency of the PIFA, thus widening the corresponding operating band, or a separate third operating band is formed for the antenna with the parasitic element. Because the parasitic element is located in the central area of the radiating plane and not in its peripheral area, the radio device user's hand does not significantly impair the matching of the antenna on an operating band which has been formed by the parasitic element. In addition, when the resonance frequency based on the parasitic element is on the upper operating band, the matching of the antenna also improves on the lower operating band.

In an antenna structure in which a base is mounted in a ground region on a circuit board, the base having formed thereon a driven radiating electrode and a parasitic radiating electrode, the parasitic radiating electrode causing multiple resonance at least in a harmonic resonant frequency band of the driven radiating electrode, capacitance loading means for loading a capacitance to a harmonic-mode zero voltage region of the driven radiating electrode is provided. The capacitance loading means is electrically connected to a ground electrode in the ground region on the circuit board via a grounding conduction path and switching means. By switching the switching means ON / OFF, capacitance loading by the capacitance loading means to the harmonic-mode zero voltage region of the driven radiating electrode is switched ON / OFF to switch a base resonant frequency in a base resonant frequency band of the driven radiating electrode.

The invention discloses an ultra wide band four-tape circularly polarized antenna which comprises a metal floor (1), a dielectric substrate (2), a radiation patch (3), a feed branch node (4), a matching branch node (5) and a micro strip line feed source (6), wherein the radiation patch (3), the feed branch node (4) and the matching branch node (5) are printed on the positive surface of the dielectric substrate (2) and are electrically connected with the micro strip line feed source (6) as well as are of a shaft symmetric shaft; a T type groove (7) is etched on the metal floor (1) which is used as a radiation reflection plate of the radiation patch (3); the center of the radiation patch (3) is etched with a polarized hole (8), the edge of the polarized hole (8) is provided with two mutually orthorhombic gaps (9) and (10), an intersection point of the two gaps is coincident with the center point of the polarized hole (8); and the micro strip line feed source (6) is placed on the edge of the dielectric substrate (2). The invention can realize that wide band four-tape circularly polarization characteristic with a wide polarization band, and can be applied to satellite communication.

An emergency lighting arrangement preferably includes plural emergency light units connected to an on-board power supply network of an aircraft, and plural emergency current sources that each include at least one capacitor. Each emergency light unit includes an emergency light emitting element and a control unit that automatically connects the capacitor of the emergency current source to the emergency light emitting element upon the failure of the on-board power supply network. Preferably, the emergency current source including the capacitor is integrated into the emergency light unit. The emergency light unit may further include normal operation light emitting elements selectively connected by the control unit to the on-board power supply network. The control unit switches between normal operation of the normal light emitting elements and charging of the capacitor, and emergency operation in which the capacitor discharges through the emergency light emitting element.

The invention provides a small sized navigation reception antenna comprising an antenna unit, a feeding plate, feeding probes, a grounding probe and an RF cable. The antenna unit comprises a bottom dielectric substrate, a middle prepreg and a top layer dielectric substrate which are closely arranged in sequence. The bottom dielectric substrate is a double-sided copper-clad board, and the upper electromagnetic band-gap structure array comprises a plurality of metal patches arranged in an array. The top dielectric substrate is a one-sided copper clad plate, and the upper layer mounted radiation patch is composed of a central main radiation patch and four parasitic radiation patches on the edge. The feeding plate is located below the antenna unit, and the two are welded together by means of two feeding probes and five grounding probes. The antenna of the invention has a reduced size without compromising the gain and the bandwidth, and can fully meet the requirements of various kinds of satellite guidance terminals.

An antenna arrangement including a first antenna element connected to a first feed point and having a first electrical length; a second antenna element connected to a second feed point, different to the first feed point, and including: a first portion which extends from the second feed point and has a second electrical length, similar to the first electrical length, which enables the first portion to electromagnetically couple with the first antenna element, and a second portion which extends from the second feed point and has a third electrical length, different to the first electrical length of the first antenna element and to the second electrical length of the first portion.

In a feeding radiation electrode of a surface mount antenna, a series inductance component such as a meander pattern is formed locally in a maximum resonance current part in a high-order mode (second-order mode) so as to locally form a series inductance component therein thereby making the maximum resonance current part have a greater electrical length per unit physical length than the other parts. This makes it possible to control the difference between the resonance frequency in a fundamental mode and the resonance frequency in the high-order mode over a large range. Furthermore, it is possible to vary the resonance frequency in the second-order mode independently of the resonance frequency in the fundamental mode by varying the number of lines or the line-to-line distance of the meander pattern thereby varying the value of the series inductance component. Thus, it is possible to easily and efficiently design a surface mount antenna having a frequency characteristic which satisfies requirements needed in multi-band applications without having to change the basic design.

The invention discloses a broadband high-isolation dual polarization antenna and a radiating unit of the broadband high-isolation dual polarization antenna. The radiating unit comprises a reflecting plate, a first feed part, a second feed part, a first radiating body, a second radiating body and four supporting parts. The first radiating body and the second radiating body are composed of diagonal radiating bodies. The four radiating bodies are respectively fixed on the four supporting parts which are fixed on the reflecting plate. Tops of the first feed part and the second feet part are crossed in an orthogonality mode and a height difference exists. The first feed part is a feed structure of the first radiating body and the second feed part is a feed structure of the second radiating body. A cross-shaped seam is formed among the four radiating bodies. A rectangle-shaped branch knot which is longer than the radiating body and faces the rim direction of an outer side of the radiating body is arranged in the middle of each radiating body face. A branch knot is arranged at the rim of the outer side of each radiating body. The dual polarization antenna radiating unit and an antenna array composed of the dual polarization antenna radiating unit have the advantages of being high in isolation , high in radiation characteristic, wide in frequency band and the like.

The invention discloses a multi-band MIMO terminal antenna based on a ground radiation mode. The antenna comprises a dielectric substrate, a metal ground and a plurality of antenna units; the plurality of antenna units are arranged on the edge of the dielectric substrate, and the metal ground is paved on other positions; the adjacent antenna units are arranged in a mirror symmetry mode, and the antennas is fed by a coaxial feeder line; each antenna unit comprises a first radiation metal strip and a second radiation metal strip, wherein the first radiation metal strip and the second radiation metal strip extend from a feed opening; the second radiation metal strip is embedded in the first radiation metal strip; and the radiation branch root parts of the first and the second radiation metalstrips are connected with the metal ground through capacitors C1 and C2. By virtue of the nesting structure of the metal strips, the multi-band mode of the ground antenna is achieved, and the space utilization rate of the antenna is improved; and meanwhile, the capacitors are connected in parallel between the multi-layer nesting structure and the metal ground, so that the electric length of the antenna is prolonged, and the physical size of the antenna is reduced.

Provided is a small monopole antenna having a loop feeder. The small monopole antenna having a loop feeder includes: a loop element forming a loop along a predetermined plane and having a loop feeder at the center thereof; a non-feeding type monopole antenna element including one end connected to a wire of the loop element and other end connected to a ground unit by being bended at the center of the loop element; a ground unit for grounding other end of the non-feeding type monopole antenna; and a first connecting unit for connecting the non-feeding type monopole antenna to an external device for feeding the loop feeder of the loop element through the non-feeding type monopole antenna.

The invention provides a 2.5D braided structure-based dual-band small-sized frequency selection surface, and aims to improve the miniaturization effect of the dual-band small-sized frequency selectionsurface. The frequency selection surface comprises M*N passive resonant units, wherein each passive resonant unit consists of a dielectric plate, a first metal patch printed on the upper surface of the dielectric plate, a second metal patch printed on the lower surface of the dielectric plate and metalized via holes; the first metal patch consists of a regular hexagonal patch and six rotary and symmetrical first stripe groups; the second metal patch consists of six rotary and symmetrical second stripe groups; each stripe in the second stripe group is positioned in a gap in the corresponding position in the lower surface of each stripe in the first stripe group; the stripes in the first metal patch and the second metal patch are connected through the metalized via holes which run through the dielectric plate to form the 2.5D braided structure. The equivalent electrical dimensions of the passive resonant units on the dual-band small-sized frequency selection surface are reduced, so thatthe dual-band small-sized frequency selection surface can be used for the fields of communication and radar.

This invention relates to a super-wide band plane single pole antenna including: a radiation element, an earth plate, a coaxial feed port, in which, the radiation element is vertical to the earth plate and connected with the coaxial feed port and composed of a trapezia and a circle with a top, which is inner-tangential with the trapezia to form a smooth transition unit.

The invention discloses a substrate integrated cavity millimeter wave antenna, and the antenna comprises a substrate integrated cavity and a parasitic unit. The substrate integrated cavity is used for receiving an electromagnetic wave and enabling the electromagnetic wave to generate higher-mode resonance in the cavity. The parasitic unit is used for adjusting the higher-mode field distribution, and enabling the radiation direction of the higher mode in the cavity to be changed to the normal direction of the substrate integrated cavity. Through enlarging the radiation area of the cavity and introducing the higher mode, the direction of the higher mode is not the normal direction of the substrate integrated cavity, and the higher-mode field distribution is adjusted through the parasitic unit, thereby enabling the antenna to work normally. Because the radiation area is enlarged, the gain of the antenna is also improved.