53 results about "Parasitic element" patented technology

The present application relates to a kind of radiation elements, the radiation element includes: radiator, feed rod and parasitic element, the radiator is fed by the feed rod, wherein, the parasitic element includes conductive structure, the conductive structure includes serpentine conductive path, and coupling capacitance is formed between conductive structure and radiator, and wherein, the center frequency of the operating frequency band of the radiator is greater than the center frequency of the first operating frequency band of parasitic element.Radiation element according to some embodiments of the present application can at least reduce the coupling interference between each array, improve isolation performance.In addition, the radiation element according to some embodiments of the present application can also be used to reduce the size of radiation element itself, so that radiation element is more compact.In addition, the present application also relates to a kind of base station antennas.

This paper describes a multi-port planar antenna system with digital reconfigurability to adjust the beamdirection function of the system. A substrate is provided, and a grid of parasitic elements is printed on the surface of the substrate. One or more driving radiating elements, such as monopole antennas or dipole antennas, are printed on the substrate near the parasitic elements. Switching elements between adjacent parasitic elements are then configured to guide the radiation direction in a specific direction in the azimuth plane. The small form factor of this planar antenna system can be used in MIMO applications employed by fifth-generation (5G) devices such as mobile phones, Internet of Things (IoT) devices, and vehicles.

An electronic device may be provided with peripheral conductive housing structures, a rear wall, and a vent that includes a conductive cowling. The device may include an antenna having an antenna arm coupled to a positive antenna feed terminal and having a parasitic element. The parasitic element may be formed from a conductive trace that is layered onto the rear wall, that is indirectly fed by the antenna arm, and that overlaps a portion of the conductive cowling. The parasitic element may be shorted to a conductive bracket on the rear wall or may be separated from the bracket by a gap. If desired, the conductive cowling may form some or all of a parasitic element for the antenna. The conductive cowling may be indirectly fed by the conductive trace and / or may include an extension that is indirectly fed by the antenna arm.

A modal antenna assembly is provided. The modal antenna includes an antenna element comprising a curved conical portion and a top portion, the top portion comprising an undulating annular ring disposed on the curved conical portion. The modal antenna further includes a parasitic element positioned at least partially within a gap defined in the curved conical portion of the antenna element.

This invention provides a wideband airspace radiation device and a wideband anti-unmanned system. The wideband airspace radiation device includes a mounting plate; a first-band radiator is arranged at the center of the mounting surface to provide omnidirectional coverage of the first band; several parasitic elements are arranged circumferentially along the first-band radiator; the second-band radiator employs directional antenna elements, with at least two second-band radiators symmetrically arranged on both sides of the first-band radiator; wherein the parasitic elements are located between the first-band and second-band radiators, and the parasitic elements are used both to guide the electromagnetic field distribution of the first-band radiator and to reflect and guide the electromagnetic waves emitted by the second-band radiator; the several second-band radiators achieve omnidirectional coverage of the second band in a back-to-back configuration. The wideband airspace radiation device provided by this disclosure can eliminate the coverage blind spots of multi-band combined omnidirectional radiators, achieving effective protection of targets.

This invention discloses a high-efficiency power amplifier with extended harmonic modulation bandwidth and its modulation method. A harmonic control circuit unit is added to the input terminal of the final stage die of the power amplifier. The extended harmonic control unit includes a second harmonic modulation circuit and a first parasitic element of the power amplifier back hole. The second parasitic element of the source back hole of the final stage transistor participates in modulation. Considering the parasitic effect of the power amplifier and the back hole at the source of the die, the harmonic modulation bandwidth is further widened by adjusting the harmonic control circuit unit, which effectively improves the working efficiency of the amplifier.

The present disclosure refers to a radome assembly, wherein the radome assembly includes a radome and parasitic components for a radiating component, characterized in that the radome itself has a hollow structure, wherein at least one receiving compartment is formed through the hollow structure, wherein the parasitic components are arranged in the receiving compartment. In addition, the present disclosure also refers to a base station antenna including the radome assembly. (Fig. 2a)

Even when mounted on a dielectric panel, it reduces the non-uniformity of the radiation pattern compared to conventional methods. [Solution] The antenna device 1 comprises an antenna module 10 configured as a microstrip antenna including planar feeding elements 14, 16 and a ground conductor 12, and strip-shaped parasitic elements 22, 23. The parasitic elements 22, 23 have a length of 3 / 4 or more of the operating wavelength λ of the antenna device 1. At least a portion of the parasitic elements 22, 23 is at a distance of 1 / 4 to 3 / 4 of the operating wavelength λ of the antenna device 1 from the ground conductor 12.

A method and apparatus for verification of an integrated circuit are provided. The method comprises obtaining simulation results of a first netlist and a layout-extracted netlist comprising parasitic elements. These elements may include parasitic resistors, capacitors, lateral bipolar transistors, field-effect transistors, substrate or well resistances, thermal models, and mechanical stress distributions. Parasitic elements are selectively included in a second netlist based on estimated electrical disturbances derived from simulation data and on contextual factors such as node impedance, node sensitivity, circuit hierarchy, and mode of operation. The method further includes checking whether parasitic elements exceed maximum electrical ratings and enables selective extraction to reduce simulation complexity. The apparatus comprises systems and executable instructions for implementing the method, including parasitic selection, extraction, and rating verification.

This document describes a waveguide with radiation slots and parasitic elements for asymmetrical coverage. An apparatus may include a waveguide for providing asymmetrical coverage in an azimuth plane. The waveguide includes a hollow channel containing a dielectric and an array of radiation slots through a surface that is operably connected with the dielectric. The waveguide includes an array of parasitic elements positioned on or in the surface and offset from a longitudinal side of the array of radiation slots. The radiation slots and parasitic elements configure the described waveguide to focus an antenna radiation pattern that provides an asymmetrical coverage to focus on a particular portion within the antenna field-of-view.

The application discloses a P-waveband broadband characteristic planar dipole antenna and belongs to the technical field of decimeter wave radio frequency front-end devices. A pair of printed planar dipoles composed of a half-elliptical part and a rectangular part and respectively located on the upper and lower surfaces of a dielectric substrate form the main radiation structure of the antenna. A metal base is composed of a metal side wall and a metal ground back plate, the metal side wall plays a role of supporting the dielectric substrate and also plays a role of a parasitic element, the current of the dipole is coupled to the parasitic element metal side wall, the current is avoided from being concentrated in the center of the dipole patch, and therefore the impedance bandwidth of the antenna is improved. The antenna has good radiation performance at 0.4 GHz, 0.5 GHz, 0.6 GHz, 0.7 GHz and 0.8 GHz, and the antenna can be widely applied to P-waveband wireless communication systems with requirements of broadband, low profile and stable performance.

Competing tradeoffs of overall footprint, weight, and performance impact the design of antennas for many applications. However, those for compact portable devices or mobile platforms exploiting global navigation satellite systems these are further compounded by seeking good performance over a wide angular range. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact broadband antennas which offer a low vertical profile relative to that provided by the common filar element approaches for high precision applications. Accordingly, through a combination of a dipole, a parasitic element, and additional ground elements to a convention ground plane the inventors provide broadband high performance antenna designs with low profile and low overall footprint.

We provide an antenna device capable of handling radio waves across a wide frequency band. [Solution] The antenna device 1 comprises a ground section 3, an antenna 2, and a parasitic element 30. The antenna 2 comprises an element 11 (main body) facing the ground section 3 and having an open end, and a feed section 12 extending from the element 11 in the direction of the ground section 3 and having a feed point 12A. The parasitic element 30 has a first end positioned at a distance from the open end of the element 11 and is used to adjust the impedance of the antenna 10.

The invention discloses a patch mutual-coupling-removing antenna based on a full-wave-band resonator. The patch mutual-coupling-removing antenna comprises two upper-layer metal patches, a middle-layer metal patch, two layers of dielectric substrates, a bottom-layer metal grounding surface and two metal probes. The two upper-layer metal patches are of rectangular structures with the same size and are arranged on the upper surface of the upper-layer dielectric substrate side by side left and right; the middle-layer metal patch is positioned between the two layers of dielectric substrates; the bottom-layer metal ground plane is located on the lower surface of the lower-layer dielectric substrate, and the two metal probes are connected with the middle-layer metal patch; wherein the middle-layer metal patch forms a strip-shaped resonator. A constant-amplitude and anti-phase electric field exists between the upper-layer metal patch and the middle-layer band-shaped resonator, and the position of a feed port is regulated and controlled to enable the feed port to fall at a weak field region, so that port decoupling can be realized. And meanwhile, the band-shaped resonator only prolongs the propagation path in the vertical direction, so that the beam width of the antenna can be expanded without adding an additional parasitic unit, and the directional diagram of the antenna is not influenced.

A switching power conversion apparatus includes an input voltage source, an output load, a first switch connected to a switching node, and a second switch connected to the switching node. An inductive element has a magnetizing current connected to the switching node. The inductive element delivers energy via the first and second switches from the voltage source to the load during power conversion cycles. A capacitance connected to the switching node can resonate with the inductive element during a portion of the power conversion cycles to cause a parasitic oscillation. A first clamp subcircuit is across the inductive element and contains a unidirectional auxiliary switch to trap energy from the inductive element and store it into the storage capacitor and prevent parasitic oscillation. The auxiliary switch is complementary to the first switch. A current source discharges the storage capacitor and uses the energy in the switching power conversion apparatus.

The invention provides a small signal model of an InP-based HEMT (High Electron Mobility Transistor) device and a parameter extraction method of the small signal model. The model comprises a stray capacitor between gate and drain bonding pads, a stray capacitor between gate and source bonding pads, a stray capacitor between drain and source bonding pads, a gate stray resistor, a gate stray inductor, a drain stray resistor, a drain stray inductor, a capacitor between gate and drain electrodes, a capacitor between gate and source electrodes and a capacitor between drain and source electrodes. An intrinsic gate-source capacitor, an intrinsic gate-drain capacitor, an intrinsic drain-source capacitor, an inter-gate-drain leakage resistor, an inter-gate-source leakage resistor, an output resistor, an intrinsic channel resistor, an intrinsic transconductance and a delay factor are included. Aiming at the working frequency of a device in a millimeter wave band, an improved small signal model is established, distributed model establishment is carried out on parasitic capacitance between bonding pads and parasitic capacitance between tube cores, four auxiliary structures are combined, parameter extraction of parasitic elements such as the parasitic capacitance between the bonding pads and the parasitic capacitance between the tube cores is respectively carried out, and the reliability of the device is improved. Therefore, the precision of the millimeter wave band small signal model is improved.

Overall coverage area, weight, and performance tradeoffs affect the design of antennas for many applications. However, for small portable devices or mobile platforms using global navigation satellite systems, these devices are further combined by seeking good performance over a wide angular range. Thus, designers providing a wide variety of electrical devices and systems with compact broadband antennas that provide low vertical profile relative to the vertical profile provided by the common wire element approach for high precision applications would be beneficial. Thus, by combining a dipole, parasitic element, and an additional ground element to a conventional ground plane, the inventors provide a broadband high performance antenna design with low profile and low overall coverage area.

The invention discloses a directional diagram reconfigurable antenna based on liquid metal, and relates to the technical field of wireless communication and antennas. The antenna comprises a dielectric substrate lower layer printed with a microstrip feeder line, a dielectric substrate, a dielectric substrate upper layer printed with a slotted floor, and a PDMS plate loaded with a liquid metal flow channel, which are stacked from bottom to top. Wherein the micro-strip feeder line is matched with a square slot in the slotted floor to form a slot coupling feed structure serving as a main radiation source; a plurality of L-shaped runners which are symmetrically distributed around the center are arranged in the PDMS plate and are used for accommodating liquid metal (such as gallium-indium-tin alloy). By controlling the filling state of the liquid metal in the runners at different positions, the liquid metal serves as a parasitic element to be coupled with the main radiation slot, the current distribution and boundary conditions of an antenna near field are changed, and therefore flexible reconstruction of an antenna radiation pattern is achieved. The invention has the advantages of compact structure, low profile, low cost, easy integration and the like, and is suitable for the requirements of a modern communication system on beam forming.

An apparatus includes an eyeglass frame, a first antenna, a second antenna, and a parasitic element. The eyeglass frame can include at least one rim. The first antenna can be attached to the eyeglass frame. The second antenna can be attached to the eyeglass frame. The second antenna can be disposed on a first side of the at least one rim. The parasitic element can be attached to the eyeglass frame. The parasitic element can be on a second side of the at least one rim. The second side of the at least one rim can be opposite from the first side. A distance from the first antenna to the second antenna can be greater than a distance from the first antenna to the parasitic element. The distance from the first antenna to the second antenna can be greater than a distance from the second antenna to the parasitic element.

A technique is described where the switch and / or tunable control circuit for use with an active multi-mode antenna is positioned remote from the antenna structure itself for integration into host communication systems. Electrical delay and impedance characteristics are compensated for in the design and configuration of transmission lines or parasitic elements as the active multi-mode antenna structure is positioned in optimal locations such that significant electrical delay is introduced between the RF front-end circuit and multi-mode antenna. This technique can be implemented in designs where it is convenient to locate switches in a front-end module (FEM) and the FEM is located in vicinity to the transceiver.

A circularly polarized antenna includes an antenna unit and a feeding unit, and the antenna unit and the feeding unit are stacked up and down; the antenna unit includes a first antenna subunit arranged on a top layer of the first substrate, a parasitic element arranged in a middle layer of the first substrate, and a second antenna subunit arranged on a bottom layer of the first substrate; the feeding unit includes a coupling slot group, arranged on a top layer of the second substrate; a matching microstrip line group, arranged on a middle layer of the second substrate; a feeding line group, arranged on a bottom layer of the second substrate; a branch line coupler, arranged on a bottom layer of the second substrate, wherein the matching microstrip line group is electrically connected between the feeding line group and the branch line coupler through a hole group.

A transmission system includes a ground plane; a first antenna element which is separate from the ground plane and which is implemented as a strip comprising a feeding end configured to be coupled to a transceiver for feeding an RF signal to the first antenna element and a free end, wherein the strip comprises a first arm including the feeding end and a second arm extending at an angle from the first arm; and a second antenna element separate from the first antenna element, which is shorted to the ground plane so as to act as a parasitic element. The first and second antenna elements are located adjacent to each other at an end of the ground plane, wherein the second arm of the first antenna element points towards the second antenna element, and wherein the arrangement formed by the first and second antenna elements has no symmetry plane.

In one embodiment, a receiving coil includes a plurality of coil elements, wherein: at least one of the coil elements includes a loop coil and a modified dipole disposed inside the loop coil; and the modified dipole includes a main dipole configured to receive a radio-frequency “RF” signal and output a reception signal and a parasitic element that includes a split ring having a gap in part of a ring shape.

A reading apparatus includes an antenna element, a substrate including a ground plane and a communication circuit, and a housing. The housing has a plate-like shape having a length in a first direction that is shorter than a length in a second direction and a length in a third direction. The reading apparatus includes a parasitic element that is disposed apart from the substrate in the first direction and is disposed so as to overlap both of the antenna element and the ground plane when viewed in the first direction, the parasitic element resonating when the antenna element is excited. A length of the parasitic element in the second direction is shorter than ½ of a wavelength of an operation frequency that is used to transmit and receive the radio signal.

The application provides a simulation method, device, power line topology network, test circuit and storage medium. The method comprises: generating a power line topology network according to a power line layout, the power line topology network comprising a plurality of first layer metal lines arranged horizontally, a plurality of second layer metal lines arranged longitudinally, power supply sub-nodes and parasitic elements, the parasitic elements being located between two power supply sub-nodes, determining minimum voltages of power input nodes of each circuit module in a circuit corresponding to the power line topology network, the power input node being one of the power supply sub-nodes in each circuit module, and performing timing simulation according to the minimum voltages of the power input nodes of each circuit module and an integrated circuit post-simulation circuit netlist. Thus, the influence of the power line voltage drop on the timing parameters of the integrated circuit can be evaluated through normal timing simulation, and the simulation accuracy and simulation speed are improved.

An antenna device (100) for a vehicle includes an antenna case (101), an antenna base (102) forming an accommodation space together with the antenna case (101), a first antenna element (108) that is accommodated in the accommodation space and that at least transmits or receives a circularly polarized wave; a second antenna element (110) that is arranged close to the first antenna element (108) and that at least transmits or receives a linearly polarized wave; and at least one parasitic element (111), (112a), (112b), or (112c) serving as a reflector or a waveguide for the second antenna element (110).

Technologies directed to a customer terminal (CT) with an in-field calibration antenna using parasitic elements of a phased array antenna are described. Once deployed, the CT can establish a communication link with a satellite (SAT) in a satellite network. The CT can also calibrate the phased array antenna using the calibration antenna.

This invention discloses a rocket-borne, large-spacing, ultra-wideband conformal phased array antenna, belonging to the field of phased array antenna technology. The antenna includes a conformal metallic carrier for the rocket body, a metasurface layer, an antenna layer, a parasitic layer, a metal ground plane, and a fixing structure. The antenna layer consists of periodically arranged dual-polarized orthogonal active antenna elements, with vertically polarized elements arranged linearly along the axial direction and horizontally polarized elements conformally bent along the cylindrical side of the rocket body. The parasitic layer consists of correspondingly arranged passive parasitic elements, arranged in an orthogonal grid alternating with the active antenna elements. Reverse current is excited by setting short-circuit strips to suppress harmful common-mode resonance in the H-plane. This invention's antenna achieves nine harmonic bandwidths in both the horizontal and vertical polarization directions, and uses a conformal approach with the rocket body to achieve an array spacing of 0.7~0.9λ. H Wide-angle scanning with no raster lobe at ±60° azimuth plane.

An ultra-wideband (UWB) antenna includes a substrate having a first surface and a second surface. The UWB antenna includes a radiating patch at the first surface. The UWB antenna includes parasitic elements at the first surface adjacent the radiating patch and an antenna ground at the second surface. The UWB antenna includes shorting pins between the radiating patch and the antenna ground. The UWB antenna has a wide beam angle greater than 120°. The UWB antenna covers the UWB channel 9 and / or channel 10 frequency band(s).

A modal antenna assembly is provided. The modal antenna includes an antenna element comprising a curved conical portion and a top portion, the top portion comprising an undulating annular ring disposed on the curved conical portion. The modal antenna further includes a parasitic element positioned at least partially within a gap defined in the curved conical portion of the antenna element.