63 results about "Parasitic structure" patented technology

The invention provides a radial element structure of a broadband bipolarized antenna, which comprises a surface radiation unit, a medium plate, a feeding support and a reflecting plate; the surface radiation unit comprises array arms of semi-wave arrays; the feeding support is positioned between the medium plate and the reflecting plate; the invention also comprises a parasitic structure which is arranged at the bottom end of the array arm of the surface radiation unit to allow two adjacent array arms to be in capacitive joint; and the surface radiation unit and the parasitic structure are adhered on two sides of the medium plate respectively. The radial element structure can improve the balance of the arrays, effectively improves the crossed polarization property and strengthens the directivity of radiation in the direction of +/-60 degrees; and the radial element structure improves the back wave loss and the isolation degree of the arrays. The radial element structure has a more stable and reliable structure and is easier to be rapidly assembled and welded as an independent part.

A multi-frequency antenna for receiving a first frequency and second frequency signals comprises a grounding element, a first conductive member, a first radiation member, and a second radiation member. The first conductive member connects to the grounding element. The first radiation member and the second radiation member connect to the first conductive member separately. The multi-frequency antenna further comprises a parasitic structure. The parasitic structure structurally encircles the second radiation member and the encirclement is a partial encirclement. Moreover, the parasitic structure connects to the grounding element.

A patch antenna receives circularly polarized RF signals from a satellite. The antenna includes a radiating element. A plurality of feed lines feed the radiating element at a plurality of feed points. The feed points are spaced apart to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. The antenna may include a plurality of parasitic structures. The feed point spacing and/or the parasitic structures tilt the radiating beam away from an axis perpendicular to the radiating element. Thus, the patch antenna provides excellent RF signal reception from satellites at low elevation angles.

The invention discloses a bidirectional ESD protection structure embedded with a low-trigger voltage PNP structure, which is used for ESD protection devices on IC chips; region, the first P+ bridge, the second P+ implant region, the second P+ bridge, the third P+ implant region, the second N+ implant region, a metal anode, a metal cathode and several field oxygen isolation regions. Under the action of high-voltage ESD pulses, on the one hand, it forms a parasitic SCR current protection path through the first P+ injection region, the first N well, P well, the second N well, and the second N+ injection region, which can increase the failure current of the device , Enhance the ESD robustness of the device. On the other hand, the parasitic PNP structure composed of the first P+ injection region, the first N well, the first P+ bridge, the P well, and the second P+ injection region is used to increase the sustain voltage of the device and enhance the anti-latch-up capability of the device. The ESD protection device has a symmetrical structure, which can realize a bidirectional ESD protection function and reduce the occupied layout area.

The invention provides a middle distance flat-plate wireless power transmission system based on magnetic resonance coupling. A complanation structure is adopted by the wireless power transmission system, and the system can be processed through a plate-making mode of a printed circuit board. Coil coplanar design is further adopted by the system, by placing an exciting coil (102) and a transmitting terminal resonance coil (101) on the same side of a dielectric substrate, meanwhile, by placing a loading coil and a receiving terminal resonance coil on the same side of the dielectric substrate, a bottom layer of the printed circuit board can be used for adding adjustable electronic parts and components, matching a circuit and rectifying a voltage regulator circuit, and the integration level of the system is improved. A parasitism structure is further adopted by the system, by utilizing a parasitic coil to the resonance coils, the coupling intensity among magnetic coupling resonance coils is strengthened, the transmission efficiency is improved, and the transmission distance is increased. The invention further provides a design and application scheme of a point-to-multipoint wireless power transmission system, and the wireless charging and electricity supplying to multiple consumer electronics, communication equipment and LED lighting equipment are achieved simultaneously.

The present disclosure relates to non-planar ESD protection devices. The present disclosure provides a device structure and method of fabricating the structure that is essentially immune to latch-up and possess high ESD robustness and reliability. In an aspect, the present disclosure provides a mixed silicidation and selective epitaxy (epi) FinFET processes for latch-up immunity together with ESD robustness, thereby allowing achievement of ESD efficient parasitic structures together with latch-up immune and reliable functional devices. The present disclosure provides a dual silicidation scheme where ESD protection element(s) have fins that are partially silicided, and functional devices have fins that are fully silicided. The present disclosure also provides a hybrid contact and junction profile scheme where ESD protection element(s) have fins that are partially silicided with or without deep junctions depending on their application, and functional devices have fins that are fully silicided with the silicide edge crossing the junction. On the other hand, a dual Epi scheme is implemented such that ESD protection elements have fins with Epi contact, and functional devices have fins that are fully silicided without Epi (raised S/D) contact.

The invention discloses an integrated substrate chamber millimeter wave array antenna. The antenna comprises an antenna array, a power division module and an external switching module, wherein the external switching module is used for leading electromagnetic waves from metal waveguide to the power division module, the electromagnetic waves are divided by the power division module into multiple paths of electromagnetic waves for output, the electromagnetic waves enter into an integrated substrate chamber of an antenna unit, high-order mode resonance is generated in the integrated substrate chamber through expanding a radiation aperture of the integrated substrate chamber, gain of the millimeter wave array antenna is improved, high-order mode field distribution of the electromagnetic waves in the integrated substrate chamber is adjusted through a parasitic structure, so the high-order mode radiation direction of the electromagnetic waves in the integrated substrate chamber is turned to be in a normal direction of the integrated substrate chamber, and normal operation of the antenna array is realized, moreover, the parasitic structure employs an I-like metal sheet, current length of the metal sheet can be improved, and bandwidth of the antenna array is enhanced.

The invention discloses a branch loading and parasitic structure loading-based small-size base station antenna unit. The branch loading and parasitic structure loading-based small-size base station antenna unit comprises a radiation patch, angular metal structures, a parasitic ring structure, a microstrip feeder, a coaxial feeder, short-circuit metal, a reflection plate, three different dielectricplates and a feeding floor, wherein the four angular metal structures are respectively arranged at tail ends of four dipole arms, the parasitic ring structure is arranged right below the radiation patch, and the reflection plate comprises a horizontal structure and metal baffle plates around the horizontal structure. By loading the angular metal posts at the tail ends of the dipole arms and loading the metal ring structure below the radiation patch, the size of the radiation patch is reduced by 25%, the impedance matching is good, and the radiation performance is stable; and with a structurethat the feeding floor and the reflection plate are separated, the antenna is flexible to assemble, and the antenna is suitable for mass production. The antenna can be applied to a base station antenna array under a limited space size condition.

The invention discloses an ESD protection device capable of modulating a trigger voltage and a preparation method thereof. One or more tunneling diodes are formed in the device. An avalanche diode isreplaced by a Zener diode on a parasitic structure, and the avalanche breakdown is replaced by tunneling breakdown on the breakdown principle, so that an electrical breakdown point of a parasitic SCRis changed, the trigger voltage is effectively reduced, and the trigger voltage is modulated according to the change of the structure. Meanwhile, the invention discloses a preparation method of the ESD protection device capable of modulating the trigger voltage, and the preparation method is used for preparing the ESD protection device capable of modulating the trigger voltage. The ESD protectiondevice formed by modulating the trigger voltage and capable of modulating the trigger voltage can meet the requirement of an ESD protection window under the FinFET technology, and it is guaranteed that the trigger voltage is lower than the damage voltage of a protected unit.

An integrated circuit preventing latchup. In the integrated circuit, an internal circuit is disposed in a substrate and has a parasitic SCR structure. At least one ESD protection circuit and active area are disposed on the substrate and coupled to a pad. A first current shunting diode has an anode coupled to the pad and a cathode coupled to a first voltage source. A second current shunting diode has a cathode coupled to the pad and an anode coupled to a second voltage source. Minority-carriers guard rings surround the first current shunting diode and the second shunting diode. Distance between the first and second current shunting diodes and the internal circuit, the active area and the ESD protection circuit exceed 80 μm.

The invention discloses a low-profile low-cross-polarization dual-polarization electromagnetic dipole antenna, and belongs to the technical field of mobile communication base station antennas. The antenna comprises two pairs of electric dipoles, two pairs of magnetic dipoles, a feed structure, a metal column and a metal reflecting plate, the electric dipole comprises two horizontal metal patches and four vertical metal patches; the magnetic dipole is a rectangular metal patch, and an included angle between the magnetic dipole and the metal reflecting plate is 60 degrees; the feed structure comprises a pair of orthogonally placed inverted L-shaped feed structures and two SMA joints, and each inverted L-shaped feed structure is divided into four parts which are connected in sequence; and the metal column is positioned between the metal reflecting plate and the vertical metal patch. According to the antenna, the low profile is kept, and meanwhile, the cross polarization ratio in a +/-60-degree sector is increased through the coupling effect of the parasitic structure, and the half-power beam width is stabilized; and the vertical metal patch which is bent downwards and the metal column structure are introduced, so that good impedance matching in a frequency band can be realized only by performing simple parameter optimization.

The invention discloses an earth plate slot radiation n-type parasitic structure multi-frequency planar monopole antenna, comprising: a square dielectric substrate; a monopole rectangular radiation arm disposed on the upper surface of the square dielectric substrate; an n-type metal parasitic structure disposed on the upper surface of the square dielectric substrate; and a metal earth plate disposed on the lower surface of the square dielectric substrate. The monopole rectangular radiation arm is a rectangular metal patch. The axis of the monopole rectangular radiation arm in parallel to a long arm passes through the center of the upper surface of the square dielectric substrate. A short side of the monopole rectangular radiation arm coincides with a first side of the upper surface of thesquare dielectric substrate, and the centers of two edges coincide with each other to serve as a feed port of the earth plate slot radiation n-type parasitic structure multi-frequency planar monopoleantenna. Two groups of rectangular slot structures are etched symmetrically on the metal earth plate. The earth plate slot radiation n-type parasitic structure multi-frequency planar monopole antennasolves the technical problems that the antenna of an existing wireless mobile communication system has a single operating frequency and thus leads to an increase in system complexity and a decrease inreliability.

The invention discloses a novel millimeter-wave low-profile planar differential double-helix antenna. The antenna consists of three parts: a first part has a feed structure, the differential feed is realized through strip lines located at two sides of the front bottom of the same dielectric plate, and the two sides of the front bottom are completely symmetrical; a second part is of a planar helixstructure, one end of the helix is connected with the strip line, and the other end axially extends, the planar helix is formed by connecting metal strips printed on the front surface and the bottom surface of the dielectric plate with the metalized via holes in a staggered manner and is of a double-helix structure, the diameter of the helix is gradually increased, and the structures of the frontsurface and the bottom surface of the dielectric plate are in 180-degree rotational symmetry; and a third part is of a parasitic structure and is composed of a metallized via hole and metal strips printed on the two sides of the front bottom of the dielectric plate. The parasitic unit is disposed around the helix. The antenna has the advantages of being low in profile, wide in bandwidth, stable incircular polarization gain, good in radiation directivity, simple in structure, easy to process and the like, and has a good application prospect in the 5G millimeter wave frequency band.

The invention discloses a high-isolation multi-input multi-output antenna based on parasitic structures. The high-isolation multi-input multi-output antenna comprises an array element cell; the arrayelement cell comprises two antenna elements which adopt the same structure and are back on to each other, each of the antenna elements comprises a substrate and a ground plate arranged at the lower part on the back surface of the substrate, the substrate and the ground plate are of an integrated structure, and a first parasitic structure and a second parasitic structure are arranged on the back surface of the substrate; a first F-shaped structure and a second F-shaped structure are arranged on the front surface of the substrate; the first parasitic structure and the second parasitic structureare symmetrically arranged about a center line of the substrate, and the first F-shaped structure and the second F-shaped structure are symmetrically arranged about the center line of the substrate; the first parasitic structure and the second parasitic structure from a low-frequency radiation unit and a reflection unit of the antenna element. With the adoption of the invention, the isolation of the antenna is improved.

The invention belongs to the technical field of small mobile antennas, and discloses an MGAA unit-based ultra-low profile double-frequency single-layer small mobile antenna, which comprises a dielectric substrate, a metal floor, an MGAA unit, a rectangular parasitic microstrip and a coaxial feeder, the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the dielectric substrate, and the metal floor is attached to the lower side of the dielectric substrate; the MGAA unit is funnel-shaped and is located at the middle position of the dielectric substrate, and the center position of the MGAA unit is connected with an inner conductor of the coaxial feeder line for feeding so as to radiate low-frequency linearly polarized electromagnetic waves; the rectangular parasitic micro-strips are located on the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linearly polarized waves. According to the invention, the MGAA unit is introduced into the dual-frequency design of the mobile communication equipment to solve the problems of miniaturization, high profile and multiband characteristic of the antenna, and the dual-frequency work of the antenna is realized by adding the parasitic structure.

The embodiment of the invention provides an antenna structure and an antenna array. The antenna structure comprises a first antenna assembly, and the first antenna assembly comprises a first three-dimensional antenna with one end grounded or connected with a reference potential, a single antenna port connected with the other end of the first three-dimensional antenna and a first parasitic structure arranged adjacent to the first three-dimensional antenna. In the antenna structure, the first three-dimensional antenna is only connected with a single antenna port, so that the number of ports required by the antenna can be reduced, that is, power consumption is reduced from the antenna dimension, heat is reduced, and stable overall antenna performance is maintained; meanwhile, a first parasitic structure is arranged adjacent to the first three-dimensional antenna. Therefore, the first antenna assembly can cover multi-frequency and broadband wavebands, such as the multi-frequency and broadband 5G millimeter wavebands, so that the user experience and the comprehensive competitiveness of the product can be remarkably improved.

The invention relates to a high-gain long-distance ultrahigh-frequency vehicle-mounted RFID tag antenna. The antenna consists of a metal patch and a flexible thin layer, wherein the metal patch comprises a tree-shaped branch, a rectangular ring, a parasitic structure, and a closed structure. The tag antenna comprises is low in profile, is small in size and is deformable. The tag antenna can be disposed at different positions of a vehicle, such as a windscreen, a vehicle transom window, and a vehicle chassis. The tag antenna not only meets an RFID engineering standard (S<11> is less than -3dB) within the complete ultrahigh-frequency RFID wave band (860MHz-960MHz), but also meets an RFID engineering excellent index (S<11> is less than -10dB) within a wider band width (886MHz-931MHz). The gain of the tag antenna reaches 12.8 dBi, the gain of a right front side of vehicle running reaches 6.5 dBi, and the maximum reading distance can reach 40 meters or more. The tag antenna is high in flexibility, and is high in universality. The tag antenna especially meets the requirements of all-weather operation in a vehicle management system, and is wide in application range.