Patent application number | Description | Published |
20090135077 | MULTI-BAND INTERNAL ANTENNA OF SYMMETRY STRUCTURE HAVING STUB - Provided is a multi-band internal antenna of a symmetry structure having stub, in which a size of the internal antenna can be reduced by stacking loop antennas, a broadband characteristic can be obtained in a high frequency band by connecting the stub to a top patch of the antenna, and a reduced SAR and an omni-directional radiation pattern can be obtained by configuring an antenna patch in a symmetry structure. The multi-band internal antenna includes: a top patch disposed in an upper portion of the antenna, the top patch being formed in a loop shape of which one end is opened; a stub connected to the top patch to expand a bandwidth of a high frequency band in an operating frequency of the antenna; a bottom patch connected to a ground part through a feeder part and a shorting part, the bottom patch being formed in a loop shape of which one end and another end are opened; a connecting part connecting the top patch to the bottom patch to transmit a signal from the bottom patch to the top patch; an intermediate part formed between the top patch and the bottom patch to a predetermined thickness; the feeder part for feeding power to the bottom patch; and the shorting part for grounding the bottom patch. The multi-band internal antenna is used in wireless communication fields. | 05-28-2009 |
20100019988 | FREQUENCY SELECTIVE SURFACE STRUCTURE FOR FILTERING OF SINGLE FREQUENCY BAND - There is provided provided a frequency selective surface (FSS) structure for filtering a single frequency band, including: a plurality of unit cells arranged at a predetermined distance, wherein each of the unit cells includes: a substrate; a circular loop formed on the substrate with a predetermined width and having at least one of meanderingly bent portions, wherein a filtering frequency band is controlled by a length of the circular loop, a width of the circular loop, a distance between the unit cells, and a thickness and dielectric constant of dielectric. | 01-28-2010 |
20110115581 | APPARATUS AND METHOD FOR IMPLEMENTING LEFT-HANDED TRANSMISSION LINE - An apparatus for implementing a left-handed transmission line includes: a substrate coated with a conductor and having a rectangular shape with a predefined size; a plurality of concave-convex lines disposed on a bottom surface of the substrate; two conductive vias disposed on a top surface of the substrate; a first bonding wire connecting top portions of a conductive line between the concave-convex lines connected between the first etching surface and the second etching surface; and a second bonding wire connecting bottom portions of a conductive line between the concave-convex lines connected between the first etching surface and the second etching surface. | 05-19-2011 |
20110128187 | SMALL ANTENNA USING SRR STRUCTURE IN WIRELESS COMMUNICATION SYSTEM AND METHOD FOR MANUFACTURING THE SAME - A small antenna using an SRR structure in a wireless communication system includes: a first radiation unit positioned over a dielectric substrate formed of a predetermined dielectric medium and having a predetermined ring shape; a feed unit positioned over the dielectric substrate and configured to feed a signal to the first radiation unit; a second radiation unit positioned under the dielectric substrate and having a predetermined ring shape; a via formed through the dielectric substrate to connect the first and second radiation units; a ground unit positioned under the dielectric substrate and configured to ground the first and second radiation units; and a metal line unit positioned under the dielectric substrate to connect the second radiation unit and the ground unit. The feed unit includes first and second capacitors which accomplish impedance matching when the signal is fed to the first radiation unit. | 06-02-2011 |
20110128201 | CIRCULARLY POLARIZED ANTENNA IN WIRELESS COMMUNICATION SYSTEM AND METHOD FOR MANUFACTURING THE SAME - A circularly polarized antenna in a wireless communication system includes: at least one feed antenna positioned at a predetermined point on at least one ground substrate; and a unit antenna having a plurality of conductive structures arranged in a predetermined identical direction on a superstrate positioned at a predetermined distance from above the feed antenna. The plurality of conductive structures and the unit antenna are configured to radiate circularly polarized waves, respectively, when the feed antenna radiates linearly polarized waves. | 06-02-2011 |
20110148736 | MULTI-INPUT MULTI-OUTPUT ANTENNA FOR IMPROVING ISOLATION - A multi-input multi-output (MIMO) antenna for improving isolation is provided. Split ring resonators (SRRs) are structurally arranged on the lower end of a ground surface between a plurality of antenna patterns spaced apart from each other. Accordingly, permeability of the SRRs has a negative value, which prevents current from flowing between antennas. Consequently, the isolation characteristic of the antennas is improved. | 06-23-2011 |
20110241798 | RESONATOR FOR COMMUNICATION SYSTEM AND FILTER USING THE SAME - Provided are a resonator and a filter performing a filtering operation by using the resonator. The filter includes a first resonation unit connected in series to an input terminal and having a first resonant frequency, a filtering unit connected in series to the first resonation unit to filter a signal inputted through the input terminal, a second resonation unit connected in series between the filtering unit and an output terminal and having a second resonant frequency, a first zero-order resonation unit connected in parallel to a connection terminal between the input terminal and the first resonation unit and having a first zero-order resonant frequency equal to the first resonant frequency, and a second zero-order resonation unit connected in parallel to a connection terminal between the output terminal and the second resonation unit and having a second zero-order resonant frequency equal to the second resonant frequency. | 10-06-2011 |
20110241966 | ANTENNA HOUSING FOR SUPRESSING BACKWARD RADIATION - An antenna housing includes a primary reflector attached to a PCB having a radiation device pattern formed on the PCB; and a secondary reflector positioned behind the primary reflector so as to maintain a predetermined distance from the primary reflector. | 10-06-2011 |
20110248793 | BAND-PASS FILTER BASED ON CRLH RESONATOR AND DUPLEXER USING THE SAME - A CRLH resonator-based band-pass filter includes at least two CRLH resonators. The resonators are connected by capacitive coupling. The resonators includes a microstrip line having input and output ports. The microstrip line includes a first interdigital line serial-connected to the input port, a second interdigital line serial-connected to the output port, a connection line connecting the first and second interdigital lines, and an inductor line parallel-connected to the connection line and provided with a grounded end. | 10-13-2011 |
20120162035 | ALL-IN-ONE MULTI-BAND ANTENNA FOR WIRELESS COMMUNICATION SYSTEM - An all-in-one multi-band antenna includes: a first antenna element configured to operate at a first frequency band, the first antenna element including a first ground, a first radiating part, and a first feed line and a first feed point through which a signal power is applied to the first radiating part; and a second antenna element configured to operate at a second frequency band, the second antenna element including a second ground, a second radiating part, and a second feed line and a second feed point through which a signal power is applied to the second radiating part, wherein the second radiating part is provided within a pseudo-cavity formed at a center portion of the first radiating part. | 06-28-2012 |
20120163727 | IMAGE RECONSTRUCTION APPARATUS AND METHOD FOR RECONSTRUCTING IMAGE OF MICROWAVE TOMOGRAPHY THEREOF - An image reconstruction apparatus includes: a transmission signal generation unit configured to generate a transmission signal in an image reconstruction region, in order to acquire an image reconstruction value; an electromagnetic wave measurement unit configured to measure electromagnetic waves by receiving the transmission signal; an image reconstruction unit configured to update a parameter by using a matrix of matched system of a Sinc-Gauss-shaped basis function which is allocated to each node of a reconstruction mesh in the image reconstruction region, and generate an image reconstruction value; and an optimization determination unit configured to determine whether the parameter of the image reconstruction unit is optimized or not, and output the image reconstruction value or cause the image reconstruction unit to repetitively perform the calculation, wherein the reconstruction mesh has a grid structure of which the size is larger than that of a forward mesh and equal to the image spatial resolution. | 06-28-2012 |
20130001421 | METHOD AND APPARATUS FOR ANALYZING SAMPLE USING TERAHERTZ WAVE - Disclosed are a method and an apparatus for analyzing a sample using terahertz waves. The method of analyzing a sample using terahertz waves includes: generating terahertz waves; simultaneously radiating two or more electromagnetic waves with different radiation angles, using the terahertz waves with a transmitting antenna; receiving the two or more electromagnetic waves transmitting the sample with a receiving antenna; and acquiring an analysis image of the sample by processing the received two or more electromagnetic waves In accordance with the present invention, it is possible to reduce the time taken to acquire an analysis image of a sample by simultaneously radiating terahertz waves with different radiation angels from one antenna. | 01-03-2013 |
20130003789 | WIRELESS COMMUNICATION METHOD AND APPARATUS USING ADAPTIVE TRANSMISSION POLARIZATION CONTROL - A wireless communication method and apparatus using adaptive transmission polarization control are provided. The wireless communication apparatus includes an orthogonal polarization antenna, a channel state estimator, and a transmission polarization state (TPS) selector. The orthogonal polarization antenna receives at least one reference signal. The channel state estimator estimates a wireless polarization channel on the basis of the reference signal. The TPS selector selects a TPS corresponding to the estimated wireless polarization channel from among a plurality of predefined TPSs, and feeds back the selected TPS information. Accordingly, the wireless communication apparatus feeds back information for polarization control using minimum uplink wireless resources, and maximizes a transmission capacity on the basis of the feedback information. | 01-03-2013 |
20130088331 | APPARATUS AND METHOD FOR RECOGNIZING LOCATION OF OBJECT IN LOCATION RECOGNITION SYSTEM - Disclosed are an apparatus and a method for recognizing a location of an object using radio frequency Identification (RFID). The method for recognizing a location of an object includes: activating tags located around radio frequency identification (RFID) tags by transmitting power to the RFID tags in a magnetic resonance type; transmitting a call signal for identifying a mobile tag attached to an object; receiving a tag identifier of the mobile tag corresponding to the call signal; receiving location information from fixed tags around the mobile tag; and recognizing the location of the mobile tag using the location information. | 04-11-2013 |
20130106671 | MULTI-FUNCTION FEED NETWORK AND ANTENNA IN COMMUNICATION SYSTEM | 05-02-2013 |
20130162474 | SIGNAL TRANSMITTING/RECEIVING APPARATUS AND METHOD FOR CONTROLLING POLARIZATION - Disclosed are signal transmitting apparatus and method capable of generating polarizations that can be controlled in real time by allocating weights to signals. A signal transmitting method for generating variable polarizations having any vector through a plurality of radiating elements vertical to each other includes: receiving an input signal and separating the input signal into a plurality of separated signals according to the number of radiating elements; and allocating weights for controlling vectors of the variable polarizations to each of the plurality of separated signals, wherein the vectors of the variable polarizations are represented by a vector sum of the plurality of separated signals allocated with weights. | 06-27-2013 |
20130267266 | METHOD OF COMMUNICATING BETWEEN BASE STATION AND TERMINAL BASED ON INTERFERENCE ALIGNMENT IN MULTI-CELL MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) INTERFERENCE CHANNEL AND METHOD AND APPARATUS OF COMMUNICATION USING INTERFERENCE ALIGNMENT AND BLOCK SUCCESSIVE INTERFERENCE PRE-CANCELLATION IN MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT INTERFERENCE CHANNEL - A communication method of a base station and a terminal based on interference alignment in a multi-cell multi-user multiple-input multiple-output (MIMO) interference channel and a method and apparatus of communication using interference alignment and block successive interference pre-cancellation in a multi-user MIMO interference channel. The base station may determine a precoding matrix to maximize a signal to interference and noise ratio (SINR) and a signal to leakage and noise ratio (SLNR) in the interference channel, and a terminal communicating with the base station may determine a decoding matrix to align interference. The transmitter including a multicell interference channel may calculate a rotation matrix for interference alignment, identify effective symbol vectors using the rotation matrix, and generate a transmit signal of a target transmitter to pre-cancel interference corresponding to a transmit signal of a neighboring transmitter. | 10-10-2013 |
20130336175 | METHOD AND APPARATUS FOR DUPLEX IN COGNITIVE RADIO COMMUNICATION SYSTEM - Provided is a method for duplex in a cognitive radio communication system, including: collecting radio environment information including information of usable radio resources; determining a duplex scheme for each radio resource based on the radio environment information; and allocating at least one of the radio resources to information to be transmitted and received, depending on characteristics of the information. | 12-19-2013 |
20130336180 | CARRIER AGGREGATION APPARATUS FOR EFFICIENTLY UTILIZING FREQUENCY RESOURCE OF LICENSE BAND AND SHAREABLE BANDS, AND OPERATION METHOD THEREOF - An exemplary embodiment provides a carrier aggregation apparatus including: a level assignment manager configured to perform management by classifying a license band allocated to a cognitive radio cell into a primary radio resource (PRR) level, and by classifying a shareable band obtained through a cognitive radio database or spectrum sensing into an auxiliary radio resource (ARR) level; a determiner configured to determine a quality of service (QoS) level of a communication service provided to the cognitive radio cell; and a service provider configured to allocate a frequency resource of the PRR level when the QoS level requires a first communication service, and to allocate a frequency resource of the ARR level when the QoS level requires a second communication service lower than the first communication service. | 12-19-2013 |
20140064402 | APPARATUS AND METHOD FOR MODULATION CLASSIFICATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus is used for modulation classification of unknown input signal in a wireless communication system. The apparatus includes a signal classification unit configured to classify the input signal into a PSK signal and an FSK signal and a modulation index decision unit configured to decide a modulation index for the PSK signal and the FSK signal classified by the signal classification unit. | 03-06-2014 |
20140169350 | APPARATUS AND METHOD FOR DETERMINING IDENTITY OF WIRELESS LAN SYSTEM - Disclosed are an apparatus and a method for determining an identity of a WLAN system occupying a channel, using information within a signal field or time synchronization between target channels. For this, the present invention includes a preamble detecting unit configured to detect a preamble in each channel; a channel information obtaining unit configured to obtain reference time information when the preamble is detected in each channel, or to obtain signal field information in each channel using the detected preamble; and an identity determining unit configured to determine an identity of a WLAN system occupying each channel by comparing the reference time information obtained in each channel, or by comparing the signal field information obtained in each channel. | 06-19-2014 |
20140172658 | VOLUME-RATE FOOD-WASTE DISPOSAL APPARATUS AND CHARGING APPARATUS FOR USE WITH THE SAME - A volume-rate food-waste disposal apparatus recognizes a user who discharges food-waste into the food-waste disposal apparatus to produce source information and weights the food-waste to produce weight information. The food-waste disposal apparatus receives an electrical power in a wireless manner and dries the food-waste using magnetic waves. The food-waste disposal apparatus transmits the source information and the source information to a charging server so that an on-line food-waste disposal fee per source is billed on a basis of a prefixed food-waste disposal fee per weight. | 06-19-2014 |
20140177546 | APPARATUS AND METHOD FOR AVOIDING INTERFERENCE BETWEEN ACCESS POINTS - The present invention relates to an apparatus and a method for avoiding signal interference between access points (APs) in a non-license band, and more particularly, an interference avoidance apparatus and method between access points (APs) that avoid interference based on whether an overlapping basic service set (OBSS) is present, whether an overlapping operation channel between adjacent APs is used, whether it is possible to select a non-overlapping operation channel between adjacent APs, and the like. | 06-26-2014 |
20140191914 | MULTI-CHANNEL ANTENNA DEVICE - A device includes a feeding circuitry, a basic mode radiator for forming a basic mode main beam pattern having one or two orthogonal polarizations based on first two orthogonal inputs received from the feeding circuitry, and a higher-order mode radiator for forming a higher-order mode conical beam pattern having one or two orthogonal polarizations based on second two orthogonal inputs received from the feeding circuitry. | 07-10-2014 |
20140198195 | TERAHERTZ HEALTH CHECKER - Provided is a terahertz health checker. The terahertz health checker includes a terahertz wave transmitter generating terahertz waves in a terahertz band, a lens outputting the terahertz waves and receiving terahertz waves reflected from the outputted terahertz waves, an imaging chip connected to the lens, detecting the received terahertz waves, and generating a digital image signal based on the detected terahertz waves, a readout circuit reading out the digital image signal, and a transceiver outputting the read-out digital image signal to the outside. | 07-17-2014 |
20140306776 | PLANAR RF CROSSOVER STRUCTURE WITH BROADBAND CHARACTERISTIC - An RF crossover structure includes a first and second independent transmission lines formed to cross with each other on a same surface of a dielectric substrate; first via-holes connected to the second transmission line so that the second transmission line is connected to a back surface from a front surface of the dielectric substrate and is connected again to the front surface of the dielectric substrate out of a crossing region at which the first and the second transmission lines are crossed. Further, the RF crossover structure includes CPW (Coplanar Waveguide) transmission lines used for a ground plane to improve a signal transmission property at the crossing region. | 10-16-2014 |