Amotech Co., Ltd.

Amosense Co., Ltd

Kyunghyun Ryu

Hyungil Baek

Jaeil Park

Chanwoo Lee

Seho Lee

Semin Oh

Hoeyoung Hwang

Jeonggeun Heo

Jungryul Kim

Yonggil Jo

Seongjae Ahn

Hyunjoo Park

Hanju Do

Wonsan Na

Kiljae Jang

Seungyeob Yi

Hongdae Jung

Yunsik Seo

Haewoon Cheon

Wonjin Seok

Jaemin Kim

Jiwoong Jeong

Disclosed is a shield can for operating as an antenna while blocking electromagnetic waves by defining a radiation region resonating in one or more frequency bands according to the formation of slots. The disclosed shield can arranged on a printed circuit board to cover electronic components mounted on the printed circuit board comprises: a first slit formed in the shield can to divide the shield can into a first inner region and a first outer region spaced from the first inner region; a shielding region, which is the first outer region divided by means of the first slit; and a first radiation region which is the first inner region divided by means of the first slit.

Shield can having antenna function

Provided is a wireless ear module having a UWB antenna to easily obtain location information of a wireless ear module case and ear modules. The wireless ear module comprises: ear modules for receiving and playing a sound source signal from an electronic device; and a case comprising an upper housing and a lower housing which are rotatably coupled, and for storing the ear modules. The ear modules and/or the case transmit a location positioning signal, and the location positioning signal is a signal for sensing the distance and direction from the electronic device to the ear modules or the case.

Wireless earphones

Disclosed is a smart tracker for communicating with a parent terminal by Bluetooth communication and communicating with the parent terminal by ultra-wideband communication during positioning. The disclosed smart tracker comprises: a first housing; a second housing coupled to the first housing to form an inner space; a circuit board arranged in the inner space formed by the first housing and the second housing; a buzzer mounted on the lower surface of the circuit board; a battery mounted on a surface of the circuit board; a first antenna arranged on the upper surface of the circuit board and spaced from the areas on which the buzzer and the battery are mounted; and a second antenna arranged on the upper surface of the circuit board and spaced from the areas on which the buzzer and the battery are mounted and from the first antenna.

Smart tracker

Presented is a position-measuring device using UWB antenna, the position-measuring device distinguishing measurement targets positioned indoors from measurement targets positioned outdoors on the basis of UWB signals received from a plurality of UWB antennas. The presented position-measuring device includes: a first UWB antenna; a second UWB antenna; a third UWB antenna; a signal processing module which outputs a signal received from the first UWB antenna and a UWB signal received from at least one among the second UWB antenna and the third UWB antenna; and a position-measuring module which measures the position of the measurement target on the basis of the UWB signals output from the signal processing module.

Position-measuring device using UWB antenna

An antenna module is proposed in which a slit and a through-hole for grounding are additionally formed in a single radiator such that the antenna module resonates in two frequency bands or expands the bandwidth around a reference resonant frequency. The proposed antenna module includes a radiator having a first slit, and the radiator is divided into a first region and a second region with respect to the first slit, wherein a plurality of first through-holes and a second slit are formed in the first region, a second through-hole is formed in the second region, and a power feeding pattern is connected to a region between the first slit and the second slit in the first region.

Antenna module

In a system for testing antenna performance, antenna performance is tested by reflecting the loss of a cable used in the antenna performance test. The system for testing antenna performance includes a tester having a test port, the test port being connected, via a cable, to an antenna that communicates with a terminal to be tested, in a shield box, when a test mode is set, wherein the tester outputs a test signal to the test port, receives a response signal corresponding to the test signal via the test port, and obtains a value, as a communication performance measurement value, by adding a calibration value to a reception signal strength of the response signal.

System for testing antenna performance

A method for providing a location tracking service on the basis of context-aware information of a location tracker, according to the present invention, transmits a signal while changing a communication method by classify a situation as an emergency situation and a normal state which is a non-emergency situation according to the context-aware information of the location tracker, such that it is possible to use power consumption reduced by a low-power communication method in the normal state, and in case of the emergency situation, to safely handle the emergency situation through a sufficient power communication method.

Method for providing location tracking service on basis of context-aware information of location tracker

A transmitting and receiving antenna system of an LPWAN repeater, according to the present invention, comprise: a first antenna and a second antenna that become a transmitting antenna according to a use's setting; a switch coupled to each of the first antenna and the second antenna; a third antenna for reception; an RF receiving end connected to the third antenna for reception; and a control unit for controlling the RF transmitting end and the RF receiving end through switching of the switch, wherein the first antenna is a dipole antenna having multiple directionalities, the second antenna is a directional patch antenna for transmitting signals in one orientational direction, and the third antenna includes an omni-directional antenna.

Transmitting and receiving antenna system of LPWAN repeater and control method thereof

The present invention is to perform position estimation in relation to a vehicle and a key module by using an ultra-wideband (UWB) and, specifically, relates to a method and system for precise position estimation for a vehicle, whereby position can be estimated, with effects minimized that result from the type of the vehicle and the quality of exterior metal of the vehicle. The method for precise position estimation for a vehicle over a UWB comprises the steps of: receiving, by an LIN transceiver, a position estimation-related signal delivered from an internal part of a vehicle, and transmitting the signal to a UWB transceiver to start the position estimation; the control unit measuring a predetermined number of times reception signal delays occurring in relation to a UWB tag, while turning on or off the switch of each of M antennas at predetermined time intervals; determining antennas at which the value of a corresponding reception signal delay measured the predetermined number of times is lower than a preset threshold; measuring the distances between the determined antennas and the distances between each of the antennas and the UWB tag; determining position angles with respect to the UWB tag by using a two-way ranging (TWR) positioning method on the basis of the distances between the antennas and the distances between each of the antennas and the UWB tag; measuring the distances between the UWB tag and UWB anchors measured using a triangulation method according to the M anchors and UWB tag; and estimating the position of the UWB tag on the basis of the position angles with respect to the UWB tag and the distances between the N UWB anchors and the UWB tag.

Method and system for precise position estimation for vehicle over UWB

A portable terminal cover fastened to a portable terminal not including a UWB module comprises: a first antenna driven by receiving wireless power through a wireless power transmission with a portable terminal; a second antenna, which is driven by the wireless power supplied from the first antenna so as to measure and receive the location and distance data for an object within a communication range; a third antenna, which is operated by the wireless power supplied from the first antenna so as to transmit the location and distance data, having been measured by the second antenna, to the portable terminal; and a control unit for controlling the first, second and third antennas.

Portable terminal cover for supporting UWB communication

A method for providing a low-power IoT communication-based geo-fence service on the basis of context awareness information of a position tracking device can comprise the steps of: allowing a context analysis engine of a position tracking device to measure context awareness information, obtained from peripheral sensors capable of receiving signals from the surroundings, such as a user's heart rate, body temperature, and movement state; determining whether a situation is emergency or ordinary on the basis of the context awareness information measured by the context analysis engine of the position tracking device; transmitting an emergency message and a measured position value to a server by using low-power IoT communication when the situation is determined to be emergency; after transmitting the emergency message, selecting a module capable of stably tracking a position from among a global positioning system (GPS), wireless fidelity (Wi-Fi) sniffing, Bluetooth low energy (BLE), and ultrawide band (UWB) modules of the position tracking device for position tracking; measuring mobile position information of a position tracking device user by using the selected position tracking module; checking whether the measured mobile position information, and the context awareness information, obtained from the peripheral sensors capable of receiving signals from the surroundings, such as the user's heart rate and body temperature can be transmitted by being converted through real-time communication; transmitting the context awareness information to the server at a frequent transmission cycle and at a data rate higher than that of ordinary times through real-time communication, if transmission through real-time communication is possible; receiving an emergency cancellation message from a server manager on the basis of the mobile position information and the context awareness information; and receiving the emergency cancellation message, and then transmitting, to the server, the context awareness information, obtained from the peripheral sensors capable of receiving signals from surroundings of the position tracking device user, such as the heart rate, body temperature and movement state, by converting the context awareness information through low-power IoT communication at a reduced transmission cycle and at a data rate lower than that of an emergency.

Method for providing low-power IoT communication-based geo-fence service on basis of context awareness information of position tracking device

A method capable of providing a low power geofence service according to the present invention comprises the steps of: detecting a reference Vrect value for estimating an indoor/outdoor position from a solar charger of a position tracker; determining whether the solar charging module (solar charger) of the position tracker is in a charging or non-charging situation, on the basis of the detected Vrect value; if it is determined that the solar charging module of the position tracker is in the charging situation, determining that the position of the position tracker is outdoors and acquiring position tracking data by using a global positioning system (GPS) module; if it is determined that the solar charger of the position tracker is in the non-charging situation, determining that the position of the position tracker is indoors or in a shaded area, and acquiring position tracking data by using one among Bluetooth low energy (BLEs), wireless fidelity (Wi-Fi), and ultra-wide band (UWB) modules other than the GPS module; and transmitting the acquired position tracking data to a server by using a low power communication scheme.

Growing community of inventors

Seoul, South Korea

Kyunghyun Ryu