54results about How to "Good communication characteristics" patented technology

The present invention intends to prevent the communication distance from becoming shorter with a reduction in size of a coil antenna to the chip size and with a consequent decrease of an induced voltage. According to the present invention there is provided a semiconductor chip having a coil antenna and a circuit surface and adapted to transmit and receive signals by radio to and from an external device. The semiconductor chip has a configuration for increasing an electromagnetic coupling coefficient between the coil antenna and the external device. According to a concrete example thereof, a magnetic material is disposed, the coil antenna is formed by a stacked structure comprising plural conductor layers and insulating layers superimposed one on another, or the coil antenna is disposed outside an external form of a circuit of the semiconductor chip.

An excitation hole is provided inside a dielectric block and, on the outer surface of the dielectric block, an input-output terminal electrically connected to an inner conductor inside the excitation hole is formed at one end portion of the excitation hole. A grounding-electrode-free portion is provided on the surface opposite to an input-output electrode of a mounting substrate with which the input-output terminal makes contact. Thus, the electric field strengths in upward and downward directions toward an outer conductor of the dielectric block from the excitation hole are balanced to suppress spurious TE-mode signals, etc.

The invention discloses a method for manufacturing an insulated gate bipolar transistor (IGBT) device. The method sequentially comprises an ion injection step of forming a p type heavily doped collecting region on the back side of a silicon wafer, a partial or whole annealing step and a step of depositing surface metal on the front side of the silicon wafer; and after the p type heavily doped collecting region is formed on the back side of the silicon wafer, a layer of silicon dioxide is deposited on the back side of the p type heavily doped collecting region. The method has the advantages that the temperature limitation of the p type ion annealing on the back side of the silicon wafer is eliminated, and high activity rate is easy to obtain. Simultaneously, the p type impurity distribution in the p type heavily doped collecting region can be optimized. On one hand, the ohmic contact with back metal is easy to form, on the other hand, the emission efficiency of a precision navigation processor (PNP) is favorably controlled, and the alternating current characteristic of the IGBT device is improved.

Disclosed are a method of and system for creating a load balanced spatial partitioning of a structured, diffusing system of particles with pairwise interactions that is scalable to a very large number of nodes and has favorable communications characteristics including well defined bounds on the number of hops and the number of nodes to which a particle's position must be sent. To deal with structural imbalance, we can assign a weight corresponding to the computational cost for a particular pair interaction of particles or locally clustered groups of particles to simulation space at the midpoint of the distance between the particles or centers of the clusters. We then carry out a spatial partitioning of the simulation volume using a k-d tree or optimal recursive bisection (ORB) to divide the volume into sections that have approximately equal total weights. To deal with local degradation of the load balance caused by changes in the distribution of particles from that used to determine the original spatial decomposition one can assign the actual computation of the pair interaction between two particles to any node that has the positions of both particles.

The invention discloses an interference and noise elimination method and device. The method comprises the following steps of: extracting a pilot frequency sequence received by a user from a receiving signal, and obtaining an interference and noise spatial characteristic matrix according to the extracted receiving pilot frequency sequence and a local sending pilot frequency sequence; determining an interference and noise relative ratio according to the interference and noise spatial characteristic matrix; and carrying out comparison on the determined interference and noise relative ratio and the predetermined threshold, selecting a corresponding equalization algorithm to carry out equalization according to a comparative result, and eliminating the interference and noise. According to the technical scheme provided by the invention, the problem of deteriorated system performances due to adopting an equalization method in a robust mode because of the unknown magnitude of interference in a communication system is solved, thereby improving the communication characteristics of cell edge users, and farthest improving the throughput of cell centre users.

A wireless IC tag which has an electrically insulative substrate, an antenna circuit provided on the surface of the substrate and an IC chip connected to the antenna circuit, wherein the antenna circuit is formed of solder and the IC chip is connected to the antenna circuit via the solder, and

A wireless IC tag comprising an electrically insulative substrate, an antenna circuit provided on the surface of the substrate, an IC chip connected to the antenna circuit, and a jumper wire connected to the antenna circuit,

• • wherein the antenna circuit is formed of a solder,
  • the jumper wire is insulatively coated with a resin composition that evaporates, decomposes, or melts at a temperature not higher than a soldering temperature, and

the jumper wire is located on the same side of the substrate where the antenna circuit is provided

Provided is a wireless communication apparatus which prevents deterioration of communication characteristics because of a transmission weight of a greatest common factor and enhances the communication characteristics of feedback MIMO. A wireless communication apparatus having a plurality of antennas includes a reception unit for obtaining channel state information of channels of signals received from another wireless communication apparatus, a channel state information calculation unit for calculating an average value of the channel state information, selecting channels having the channel state information equal to or higher than a threshold based on the average value and calculating representative channel state information of the predetermined frequency band overall from the channel state information of the selected channels, a transmission weight selection unit for selecting a transmission weight based on the representative channel state information, and a transmission unit for transmitting identification information of the transmission weight to the another wireless communication apparatus.

Techniques are disclosed for creating a load balanced spatial partitioning of a structured, diffusing system of particles. An exemplary method includes steps of determining a subset of a set of nodes within a given portion of the coordinate system intersected by a surface defined by points having a given distance from the surface of the given node; and mirroring the determined subset to at least another portion of the coordinate system.

A wireless communication device that includes a first electrode connected to a first terminal electrode of an RFIC element and a second electrode connected to a second terminal electrode of the RFIC element. Moreover, the first electrode has a longitudinal direction and a lateral direction and has a first portion connected to the first terminal electrode and a second portion that faces the first portion and the second electrode. The first portion has an extended portion that extends in the longitudinal direction beyond a connection point between the second electrode and the second terminal electrode.

In a wireless IC device, a columnar body includes a metal body with an insulating film. A loop-shaped antenna conductor is provided on an upper surface of the columnar body via an insulating pedestal. The loop surface of the antenna conductor is parallel or substantially parallel to the upper surface of the columnar body. On the lower surface of a RFIC element, two terminal electrodes are provided. The RFIC element is mounted on the antenna conductor such that the two terminal electrodes are connected to both ends of the antenna conductor, respectively. One end of the connecting conductor is connected to the vicinity of one end of the antenna conductor, and the other end of the connecting conductor is connected to the upper surface of the columnar body.

The invention provides a partially filled pipe detection circuit of an electromagnetic flowmeter. The partially filled pipe detection circuit comprises a CPU drive signal waveform transforming circuit, a first-grade passive lowpass filtering circuit, a differential signal amplification circuit, an active power filter circuit, and an absolute value transforming circuit. One end of the CPU drive signal waveform transforming circuit acquires high-frequency pulse signals, and the other end is connected with the first-grade passive lowpass filtering circuit. The first-grade passive lowpass filtering circuit is connected with the differential signal amplification circuit. A voltage follower circuit in the active power filter circuit is connected with a second-order active high-pass filtering circuit. The differential amplification circuit is also connected with the voltage follower circuit. The second-order active high-pass filtering circuit is connected with the absolute value transforming circuit. The absolute value transforming circuit outputs detection signals. A [pi] type filter circuit formed by a RC is used in the input end of a differential operational amplifier, and the [pi] type filter circuit can effectively filter spike noise caused by liquid flow when pipes are partially filled, so as to reduce interference. The partially filled pipe detection circuit is advantaged by real-time online monitoring, fast response speed, relatively good noise inhibiting ability, stable and reliable detection performance.

In this mobile device, at least either the selection antenna module or the selection circuit module is so formed as to be incapable of being mounted on the mobile device body when the selection antenna module and the selection circuit module are not matched to each other, and both the selection antenna module and the selection circuit module are so formed as to be capable of being mounted on the mobile device body when the selection antenna module and the selection circuit module are matched to each other.

Provided is an antenna device that enables the realization of both good communication characteristics and good mechanical strength and that has a structure that is favourable to both small size and low profiling. The antenna device, which communicates information by coupling the electromagnetic fields between a pair of opposing electrodes by using a prescribed communication wavelength, comprises a coupling electrode (17) that is formed on a dielectric substrate (11) and that becomes communicable by electromagnetic coupling with an electrode of another antenna device. The coupling electrode (17) has a line (12) that is half the length of the communication wavelength and is formed on the dielectric substrate (11), and a ground (13) that opposes the line center (12a) of the line (12) and the surface direction of the dielectric substrate (11) and that is electrically connected to the line (12). The coupling electrode electromagnetically couples with an electrode of another antenna device disposed on an extended line connecting the line center (12a) and the ground (13).