128 results about "Parasitic element" patented technology

Based on a received signal y(t) received by a radiating element of an array antenna including the single radiating element and a plurality of parasitic elements, an adaptive controller calculates and sets a reactance value of a variable reactance element for directing a main beam of the array antenna in a direction of a desired wave and directing nulls in directions of interference waves so that a value of an objective function expressed by only the received signal y(t) becomes either one of the maximum and the minimum by using an iterative numerical solution of a nonlinear programming method.

An antenna comprising an IMD element, and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements.

An antenna comprising an IMD element, and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements.

A mobile wireless terminal includes a housing, a cover removably attached to the housing, and an antenna device disposed inside the housing. The antenna device includes a first antenna element that is disposed inside the housing and serves as a feed element, a plate that provides a ground plane for the first antenna element, and a second antenna element that is formed on one surface of the cover so as to face the first antenna element with the cover being attached to the housing and capacitively couple to the first antenna element and that serves as a parasitic element.

A multiband planar inverted F antenna (PIFA) can provide improved performance and operating efficiency, and utilizes a capacitive element configured to provide high efficiency operation, and a tuning area that allows the antenna to be tuned independently of the capacitive element. As a result of this feature, the antenna can be tuned to the desired operating frequencies, while allowing the capacitive element to remain configured for optimal operating efficiency. The antenna can be configured in a loop for effective utilization of a given volume and can therefore be relatively small in size and high efficiency. A capacitive loading section can be included to allow improved antenna efficiency and radiation. Additionally, tuning section can be provided to allow the antenna to be tuned without adjusting the capacitive loading section. To obtain operation at an additional frequency band, a parasitic element or a slot configuration can be included.

A subject of the present invention is to provide an antenna unit and a portable radio device capable of attaining a wider bandwidth and a lower SAR. In the present invention, an antenna element (12) that has an effective length corresponding to a half wavelength of a transmitting frequency and a parasitic element (13) that has an effective length corresponding to a half wavelength of a receiving frequency are provided, an antenna current is induced in the antenna element (12) at the transmitting frequency upon transmitting a radio wave in a predetermined transmitting frequency band, and another antenna current is induced in the parasitic element (13) by a spatial coupling between the antenna element (12) and the parasitic element (13) at the receiving frequency upon receiving the radio wave in a predetermined receiving frequency band, whereby peak points in an antenna current distribution are scattered into two points. Accordingly, a wider bandwidth can be obtained without addition of a matching circuit and also expansion of a parts packaging space on a board and reduction in the number of packaged parts can be achieved.

A MEMS planar antenna array is provided comprising a planar field of MEMSs. A lattice of parasitic elements can be formed by selectively connecting at least one MEMS in the field. An antenna active element is formed by selectively connecting MEMS in the field. Alternately, both the parasitic elements and the active elements are formed by connecting MEMS. The parasitic elements have a number, shape, length, distance from the active element, and position with respect to the active element that are formed in response to selectively connecting MEMS in the field. Further, a plurality of different parasitic element lattices can be formed in response to selectively connecting MEMS in the field. Likewise, the active element has a length, shape, and position that is formed in response to selectively connecting MEMS. Patch, monopole, and dipole antennas are among the antenna types that can be formed from the MEMS.

Provided is an antenna which has a small-sized planar constitution as can be easily mounted on a small-sized radio device and which can form a principal beam having a vertical polarization in directions of low and high elevation angles. On the surface of a substrate 11, slot elements 13A and 13B having a length of about one half wavelength are arranged in parallel at a predetermined distance d1, and a reflecting plate 14 is arranged at a predetermined distance h from the mounting face of the slot elements 13A and 13B. On the back of the substrate 11, parasitic elements 15A to 15D are made of a copper foil pattern and are arrayed to intersect the slot elements 13A and 13B at right angles. A switching element 16A is connected with the parasitic elements 15A and 15B, and a switching element 16B is connected with the parasitic elements 15C and 15D.

An adaptive controller for an ESPAR antenna randomly perturbs a bias voltage vector V(n) composed of elements of bias voltage values Vm by a random vector R(n) generated by a random number generator, compares an objective function value J(n) of a cross correlation coefficient for a bias voltage vector V(n) before the perturbation with an objective function value J(n+1) of a cross correlation coefficient for a bias voltage vector V(n+1) after the perturbation, and selects and sets the bias voltage Vm corresponding to that when the cross correlation coefficient increases before and after the perturbation. Then the adaptive controller repeats the random perturbation and setting from the bias voltage of respective varactor diodes. This leads to that it is not necessary to provide a long training sequence signal, and the control process can be executed with learning so that a performance can be improved every iteration for search.

The invention relates to a design method of a 3G (third-generation) antenna of a full-screen intelligent mobile phone and the corresponding antenna. The design method comprises the steps of arranging a high-frequency circuit and a low-frequency circuit of the antenna on a circuit board, wherein the high-frequency circuit and the low-frequency circuit are isolated through an isolating trough, and adjusting the length and the width of the isolating trough to control resonance between the high-frequency circuit and the low-frequency circuit; and arranging a feed point and a ground point, wherein the ground point is arranged on the external side of the feed point, i.e. close to the side of the circuit board; and after an arranged second isolating trough leads out high-frequency second resonance, adjusting the length or the thickness of the second isolating trough to adjust the low-frequency band of the antenna, so as to match with a radio-frequency power amplifier to realize high frequency and high sensitivity. The antenna designed by adopting the design method provided by the invention has the advantages that the volume is small, the performance is excellent and the problem that the low-frequency radiation power and the low-frequency receiving sensitivity of the antenna are decreased because a method of adding a parasitic element to increase bandwidth is adopted can be effectively avoided.

Computer-implemented techniques for verifying ESD device connectivity in an IC include the steps of: receiving an input dataset including layout parameters corresponding to the integrated circuit; identifying ESD devices based at least in part on the input dataset; extracting devices and parasitic elements in at least a portion of the integrated circuit based at least in part on the input dataset; generating a file including connectivity information and dimensional characteristics for extracted devices and parasitic elements associated with at least ESD protection circuitry in the integrated circuit; identifying at least one ESD test based on the identified ESD devices and on connectivity to the respective ESD devices; and performing a linear network analysis for each identified ESD test based at least in part on the netlist evaluated under ESD conditions, the identified ESD devices being removed from the network analysis, the network analysis being used to ensure that current densities through respective conductive connections included in the identified ESD test are less than or equal to a first prescribed threshold, and / or voltage drops associated with the respective conductive connections are less than or equal to a second prescribed threshold.

The method and apparatus described herein improves the impedance matching of a multi-band antenna (100). In particular, the multi-band antenna (100) comprises a radiating element (110) vertically displaced from an antenna ground plane (132) by feed and ground elements (116, 118), and a parasitic element (120) interposed between the feed and ground elements (116, 118). When the multi-band antenna (100) operates in the first frequency band, a selection circuit (140) connects the parasitic element (120) to the ground plane (132) to capacitively couple the ground element (118) to the feed element (116). However, when the multi-band antenna (100) operates in the second frequency band, the selection circuit (140) disables the capacitive coupling. By applying the capacitive coupling only when the multi-band antenna (100) operates in the first frequency band, the present invention improves the performance of the antenna (100) in the first frequency band without adversely affecting the performance of the antenna (100) in the second frequency band.

In a layout data forming step and a layout outputting step after a netlist is read, layout data is formed based on the netlist. In a path sorting step in parallel with these steps, a delay for each path is calculated based on the netlist to compare with a predetermined delay. Only a path having a delay exceeding the predetermined delay is output as a target path to an extraction path file. Then in a parasitic element extracting step, parasitic elements are extracted only from a graphic pattern included in the target path in the layout data while referencing the extraction path file.

An adjustable multi-band planar antenna especially applicable in mobile terminals. In the structure of the antenna, advantageously on a surface of a dielectric part, there is placed a conductive element (430) having a significant electromagnetic coupling to the radiating plane (422). The arrangement further comprises a filter (440) and a switch (SW) so that the parasitic conductive element at issue can be connected through the filter to a terminal element (TE) connected to the ground plane. That terminal element is pure short-circuit or a reactive element. An antenna's operation band, which is desired to be displaced, situates on pass band of the filter, and another operation band, which is desired not to be effected, situates in stop band of the filter. Controlling the switch causes the electric length of the antenna's part corresponding for example the upper operation band to change measured from the short-circuit point, in which case also the resonance frequency changes and the band is displaced. Only one operation band of the antenna is affected because on the other operation bands a high impedance is 'seen' from the parasitic element towards the ground, although the switch is closed.

An adaptive antenna apparatus includes two antenna elements and a parasitic element to which a variable reactance element is connected, and selects an adaptive control processing according to detected signal quality. A controller executes a first adaptive control processing for adaptively controlling respective received signals received by the respective antenna elements and outputting the respective received signals after the adaptive control as a combined received signal, and executes a second adaptive control processing for reactance controlling an element value of the variable reactance element. The controller executes the first adaptive control processing. The controller executes a communication processing when the detected signal quality is equal to or larger than a predetermined threshold. The controller executes the second adaptive control processing when the detected signal quality is not equal to or larger than the threshold.

An extremely thin embedded antenna for an armor-carrying vehicle utilizes a dipole driven element to the inside of the armor plate and a parasitically-driven dipole element on top of the armor plate, with the parasitic element providing appropriate forward gain and antenna matching characteristics such that there need be no aperturing of the armor plate in order to feed the antenna. In one embodiment, the bowtie antenna elements are elongated, extended or expanded by outboard antenna sections which are spaced from the distal ends of the corresponding bowties, with a meanderline choke bridging the gap between a bowtie element and its extended portion.

A supplemental antenna assembly is provided for use with an electronic device having an integral radio antenna, such as a wireless-enabled laptop computer, notebook computer, gaming device, personal digital assistant (PDA), or circuit card (e.g., a PCMCIA card) or other circuit assembly designed be used with such a device. The supplemental antenna assembly includes a parasitic element supported by a frame. The frame is configured to be attached to the housing of the portable device such that an inductive coupling is provided between the parasitic element and the integral radio antenna. The parasitic element may include, for example, an antenna and / or a coupling element, e.g., a coupling element configured to be connected to an external antenna.

The invention relates to an S-waveband communication-in-motion double-frequency circularly polarized micro-strip antenna and an array thereof. The micro-strip antenna includes a metal floor, a dielectric substrate, a radiation metal sheet, a parasitic metal sheet and a micro-strip feeder line, and the micro-strip antenna array includes a metal floor, a dielectric substrate, a radiation metal sheet, a parasitic metal sheet and a micro-strip feed network. The S-waveband double-frequency circularly polarized micro-strip antenna and the array thereof introduces the parasitic element on the basis of a traditional double-fed circularly polarized micro-strip antenna and an array thereof, thereby greatly expanding the working bandwidth, and enabling excellent impedance characteristic and radiation characteristic to be realized in a double-frequency-band range of uplink 1.98 to 2.01 GHz and downlink 2.17 to 2.20 GHz of an S waveband.

A loop antenna includes a parasitic element arranged at a position almost concentric to a loop element and having an opening portion smaller than the half perimeter of the loop element at a position opposite to the feeding point of the loop element.

An antenna device includes a ground electrode, a feed element, and a parasitic element. The ground electrode has a substantially non-square rectangular plane shape that includes a first side extending in a first direction and a second side extending in a second direction orthogonal to the first direction. The feed element has a substantially rectangular plane shape and is formed in such a way that each side of the feed element becomes parallel to the first direction or the second direction. The parasitic element is formed in such a manner as to face a side of the feed element parallel to the first side. The feed element is configured to radiate a first polarized wave that excites in the first direction and a second polarized wave that excites in the second direction. The length of the first side is longer than the length of the second side.

A feeding element is disposed on or in a first substrate. A second substrate overlies the feeding element. The second substrate is a flexible substrate including an extending portion extending outside the first substrate. A parasitic element coupled to the feeding element is disposed on or in the second substrate. A radiating electrode connected to the parasitic element is disposed on the extending portion of the second substrate.

A mobile device includes a metal mechanism element, a ground plane, a feeding element, a parasitic element, and a dielectric substrate. The metal mechanism element has a slot. The ground plane is coupled to the metal mechanism element. The feeding element is coupled to a signal source. The feeding element extends across the slot. The parasitic element is coupled to the ground plane. The parasitic element extends across the slot. The ground plane, the feeding element, and the parasitic element are disposed on the dielectric substrate. An antenna structure is formed by the feeding element, the parasitic element, and the slot of the metal mechanism element.

The embodiment relates to a packaging substrate and a semiconductor device, comprising an element unit comprising a semiconductor element; and a packaging substrate electrically connected to the element unit; and it applies a glass substrate as a core of the packaging substrate, thereby can significantly improve electrical properties such as a signal transmission rate by connecting the semiconductor element and a motherboard to be closer to each other so that electrical signals are transmitted through as short a path as possible. Therefore, it can significantly improve electrical properties such a signal transmission rate, substantially prevent generating of parasitic element, and simplify a process of treatment for an insulating layer, and thus provides a packaging substrate applicable to a high-speed circuit.

A patch antenna device configured to receive a radio communication signal includes a circuit board, a patch antenna, and a parasitic element. The circuit board has a signal processing circuit placed thereon. The patch antenna is stacked on the circuit board and has a quadrangular radiation element. The parasitic element is disposed above the patch antenna so as to improve antenna gain characteristics of the patch antenna and configured such that the length of the upper side of the parasitic element is shorter than the width in a plan view of the radiation element of the patch antenna and that the length between the upper and lower sides of the parasitic element is longer than the length between the upper and lower sides of the radiation element of the patch antenna.

The invention discloses a modeling method of an MOS device, and the method comprises the following steps: S01, constructing a model circuit of the MOS device, wherein the model circuit comprises an intrinsic transistor, a substrate parasitic resistor, a parasitic capacitor, a parasitic diode, a grid parasitic resistor inductance network, a source parasitic resistor inductance network and a drain parasitic resistor inductance network; S02, determining models and size parameters of an intrinsic transistor and a parasitic diode in the model circuit; S03, respectively determining parasitic elementvalues of the source parasitic resistance inductance network and the drain parasitic resistance inductance network by adopting an electromagnetic simulation method; S04, determining parasitic elementvalues of the substrate parasitic resistance, parasitic capacitance and grid parasitic resistance inductance network based on the test data; and S05, substituting the calculated parasitic element value into the model circuit. The model circuit comprises the parasitic resistance inductance network of each connection path, and the model is wider in application range and can be suitable for millimeter waves and other frequency bands.

An antenna includes a dielectric substrate, a radiating element, a parasitic element, and a ground conductor. The dielectric substrate has a plate-like shape having a top face and a back face opposite to each other. The radiating element is placed between the top face and the back face of the dielectric substrate and transmits and receives a radio frequency signal of a first frequency. The parasitic element is placed on the top face of the dielectric substrate and transmits and receives a radio frequency signal of a second frequency. The ground conductor is placed on the back face of the dielectric substrate. The second frequency is a lower frequency than the first frequency. The dielectric substrate has an electric field boundary plane that reflects a radio frequency signal of the second frequency at an intermediate position in a thickness direction orthogonal to the top face and the back face.