725results about How to "Improve communication distance" patented technology

In a wireless IC tag, metallic antennas are deposited as thin films on the front and back surfaces of a spacer, made of a heat-resistant glass epoxy material having a desired dielectric constant, to form a first antenna and a second antenna. An IC chip is mounted in the center of the first antenna. The second antenna functions as an auxiliary antenna for resonating to a desired frequency of a transmission radio wave of the first antenna to strengthen the intensity of the radio wave. Accordingly, even when the IC tag is mounted to a cable or the like, the tag can be mounted in the interior of the enclosure of the cable and thus the radio wave intensity of the first antenna can be prevented from being weakened by a metallic member in the cable.

The present invention provides a power supply circuit provided with a battery as a power source for supplying power to an RFID, and the battery of the power supply circuit is charged with a wireless signal. Then, a switching circuit is provided in the power supply circuit that supplies power to a signal control circuit which transmits and receives individual information to and from the outside to intermittently control supply of power to the signal control circuit by a signal from a low-frequency signal generation circuit.

An antenna apparatus used in a wireless communication medium or a wireless communication medium processing apparatus constructed by a constitution of including a magnetic member in which a magnetic ceramic powder is used as a major component thereof and which is provided with flexibility, an antenna formed at a surface or inside of the magnetic member, and a matching circuit of the antenna formed at the surface or the inside of the magnetic member.

The present invention provides a battery as a power supply for supplying power in the RFID, and another antenna for charging the battery, in addition to an antenna which transmits and receives individual information to and from outside as a means for supplying power to the battery.

To provide a semiconductor device including an RFID which can transmit and receive individual information without checking of the remaining charge of a battery or a replacing operation of the battery in accordance with deterioration over time of the battery for driving, and can maintain an excellent state for transmission and reception of individual information even when power of a radio wave or an electromagnetic wave from outside is insufficient. A battery (also described as a secondary battery) is provided as a power supply for supplying power to the RFID. Then, when power which is obtained from a signal received from outside is larger than predetermined power, its surplus power is stored in the battery; and when the power which is obtained from the signal received from outside is smaller than the predetermined power, power which is obtained from the battery is used for the power for driving.

An object is to provide a semiconductor device including an RFID which can transmit/receive individual information without a change of a battery accompanied by deterioration over time of the battery as a drive power source, and to which driving power can be supplied to keep a favorable transmission/reception state of the individual information even when an external electromagnetic wave is not sufficient. The semiconductor device includes a signal processing circuit, a first antenna circuit and a second antenna circuit operationally connected to the signal processing circuit, and a battery operationally connected to the signal processing circuit, in which the first antenna circuit transmits/receives a signal for transmitting data stored in the signal processing circuit; the second antenna circuit receives a signal for charging the battery; and a signal received by the first antenna circuit and a signal received by the second antenna circuit have different wavelengths.

A high-frequency micro-strip line for transmitting a high-frequency wave for a wireless LAN system has a layered structure where, on a ground layer made of a conductive material, a dielectric layer made of a dielectric material and a signal line made of a conductive material are successively laid. The high-frequency micro-strip line further includes a patch antenna comprising a dielectric plate made of a dielectric material and a patch made of a conductive material, which are successively laid into a layered structure, the patch antenna being electrically connected to the signal line. A wireless-communication RF signal transmission device capable of being applied to such a line is also provided.

It is an object of the present invention to reduce the cost of a wireless chip, further, to reduce the cost of a wireless chip by enabling the mass production of a wireless chip, and furthermore, to provide a downsized and lightweight wireless chip. A wireless chip in which a thin film integrated circuit peeled from a glass substrate or a quartz substrate is formed between a first base material and a second base material is provided according to the invention. As compared with a wireless chip formed from a silicon substrate, the wireless chip according to the invention realizes downsizing, thinness, and lightweight. The thin film integrated circuit included in the wireless chip according to the invention at least has an n-type thin film transistor having an LDD (Lightly Doped Drain) structure, a p-type thin film transistor having a single drain structure, and a conductive layer functioning as an antenna.

The present invention relates to a collision prevention method for a RFID system and a RFID system to minimize the collision of response signals by using sector antennas and controlling the power. The present invention comprises the steps of: separating plural tags in a space by setting up plural number of sector antennas; setting up the output stages of the power of each sector antenna to be increased in plural sequential stages; and reading a tag belonging to the output range by selecting a first sector antenna and transmitting minimum power among the set up stages. The present invention considerably reduce the collision probability of response signals of tags by dividing the tags in a space when a reader reads or writes tag information. The present invention also minimizes the time consumed to read/write tags and improves the communication distance and capacity.

The present invention provides an antenna with low resistance and a semiconductor device having an antenna whose communication distance is improved. A fluid containing conductive particles is applied over an object. After curing the fluid containing the conductive particles, the fluid is irradiated with a laser to form an antenna. As a method for applying the fluid containing the conductive particles, screen printing, spin coating, dipping, or a droplet discharging method is used. Further, a solid laser having a wavelength of 1 nm or more and 380 nm or less is used as the laser.

An antenna device includes a casing including a metal casing portion and a feed coil. The metal casing portion includes a main surface, a side surface connected to the main surfaces, and a notch portion located in the side surface. The feed coil is disposed inside the casing to be coupled with the metal casing portion by a magnetic field, and includes a winding central portion forming a coil opening portion. The feed coil is disposed near the notch portion, with the coil opening portion directed to a region including the notch portion.

An interactive smart nails and network information systems, its features is that it is formed by at least by a group of interactive intelligent nails, multifunctional vehicle card / box structure, an interactive smart nails with the appropriate spacing emplaced on the road , road side road or parking place, multifunctional vehicle card / box placed in vehicles, interactive smart nail through its embedded between the wired or wireless data communication devices direct or indirect data communication connectivity, interactive Intelligence nails passing through or near their vehicles at the multi-purpose vehicle card / box and through their respective embedded wireless data communication devices can be single / two-way information and communication. This invention has a variety of functions, high level of intelligence information, reliable performance, lower system costs, the advantages of easy installation, and system maintenance and expansion easy, round-the-clock weather conditions in the application.

The invention discloses a method for shaping distributed array aerial beams on the basis of channel calibration, which comprises building a 'virtual' aerial cluster and adopting master-salve structures between each node in the cluster, emitting reference signals to all slave nodes by a master node simultaneously according to preset transceiving time slots, utilizing phase-locked loops to phase-lock received reference signals after each slave node receives the reference signals, then, sending baseband reference signals which are outputted by each phase-locked loop back to the master node in turn through a feedback mode, calculating out corresponding correction factors according to signals which are returned back from each slave node by the master node and storing, broadcasting in a data mode after obtaining the correction factors of each slave node and abstracting each correction factor from data broadcast by each slave node, finally, utilizing obtained correction factor to phase-correct signals which will be sent after estimating and complementing each slave node according to the reference signals which are sent by a receiving key station by each slave node, superimposing in-phase after all signals which are sent by the slave nodes reach the key station, and forming beams on the key station direction.

A smart card having an extended communication distance includes a card body, at least one chip and at least one antenna attached to the chip, wherein the chip and the antenna are embedded in the card body. The smart card is characterized in that the antenna is provided with at least one metal core.

An object is to reduce power consumption of an analog-digital converter circuit. An analog potential obtained in a sensor or the like is held in a sample-and-hold circuit including a transistor with an extremely low off-state current. In the sample-and-hold circuit, the analog potential is held in a node which is able to hold a charge by turning off the transistor. Then, power supply to a buffer circuit or the like included in the sample-and-hold circuit is stopped to reduce power consumption. In a structure where a potential is held in each node, power consumption can be further reduced when a transistor with an extremely low off-state current is connected to a node holding a potential of a comparator, a successive approximation register, a digital-analog converter circuit, or the like, and power supply to these circuits is stopped.

A light source apparatus is provided with a light scattering region 5 containing light scattering particles 6 disposed in a part of a region extending from a semiconductor light-emitting laser chip 1 to an external space. An asymmetry factor g of the light scattering particles 6 and a transport optical depth <n> of the light scattering region 5 are set so that their product g.<n> satisfies a following condition:

2≦g·<n>≦40

The light source apparatus is of small-size and low-cost and can ensure safety of human eyes as well as obtain a high optical output.