Amotech Co., Ltd.

Amosense Co., Ltd

Chanwoo Lee

Hyungil Baek

Kyunghyun Ryu

Jaeil Park

Seongjae Ahn

Seho Lee

Jeonggeun Heo

Hanju Do

Hoeyoung Hwang

Yonggil Jo

Jungryul Kim

Jongho Park

Haewoon Cheon

Wonjin Seok

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

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

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 repeater system for LPWAN according to the present invention is characterized by comprising: a first antenna and a second antenna which may be antennas for transmission or reception according to a user's selection; a switch which is coupled to each of the first antenna and the second antenna; an RF transmission end and an RF reception end which are connected to the first antenna and the second antenna through the switch; and a control unit for controlling the switching of the switch and for controlling the RF transmission end and the RF reception end, wherein the first antenna is a multi-directional dipole antenna, and the second antenna includes a directional antenna for receiving and transmitting signals in a single direction.

Repeater system for LPWAN and method for controlling same

Disclosed is herein an antenna performance tester including: a horizontal rotorrotatable about a shaft partto which a DUT holderis detachably coupled; and a vertical rotorto which a reference antenna holderis detachably fixed and which is spaced apart from a side surface of the DUT holder, is installed perpendicular to the horizontal rotor, and is rotatable about a virtual central point lying at the center. The antenna performance tester is advantageous in that: a reference antenna measures an RF while performing transmission and reception with respect to a DUT in all directions at a constant distance from the DUT; extension and replacement are possible depending on a frequency to be measured; and an influence of reflected waves is minimized at RF measurement, antenna performance can be simply tested in an anechoic chamber or even in a semi-anechoic chamber.

Growing community of inventors

Yongin-si, South Korea

Chanwoo Lee