公开(公告)号：US20250096845A1

公开(公告)日：2025-03-20

申请号：US18889309

申请日：2024-09-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kye Seok YOON ,  In Kui CHO ,  Jung Hoon OH ,  Jang Yeol KIM ,  Hyun Joon LEE

IPC: H04B5/24 ,  H04B1/00 ,  H04B5/43

Abstract: A system for performing magnetic field communication is disclosed. According to one embodiment of the present disclosure, a system for performing magnetic field communication may include a first current mode power supply having a voltage and one or more inductors connected thereto; a power amplifier connected to the first current mode power supply; a first matching impedance unit including a first capacitor connected to the power amplifier; and a first magnetic field antenna including a coil and a resistor connected in parallel with the first matching impedance unit.

公开(公告)号：US20220360295A1

公开(公告)日：2022-11-10

申请号：US17734286

申请日：2022-05-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： In Kui CHO ,  Jang Yeol KIM ,  Jung Hoon OH ,  Jae Woo LEE ,  Jae Ho LEE ,  Hyun Joon LEE ,  Sang Won KIM ,  Seong Min KIM ,  Jung Ick MOON ,  Woo Jin BYUN ,  Je Hoon YUN

IPC: H04B5/00

Abstract: An antenna device for magnetic field communication may include: a first coil; a second coil; a third coil; a first capacitor connected to a 1-1 terminal of the first coil; a second capacitor connected to a 2-1 terminal of the second coil; a third capacitor connected to a 3-1 terminal of the third coil; and an input port including a first input terminal connected to a 1-2 terminal of the first coil, a 2-2 terminal of the second coil, and a 3-2 terminal of the third coil, and a second input terminal connected to the first capacitor, the second capacitor, and the third capacitor.

公开(公告)号：US20220179017A1

公开(公告)日：2022-06-09

申请号：US17538288

申请日：2021-11-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Joon LEE ,  Jang Yeol KIM ,  Jae Woo LEE ,  In Kui CHO ,  Sang Won KIM ,  Seong Min KIM ,  Jung Ick MOON ,  Je Hoon YUN ,  Dong Won JANG

IPC: G01R33/26

Abstract: An atomic magnetometer, which operates in a communication system using a magnetic signal in a very low frequency (VLF) band, may comprise: a vapor cell comprising one or more alkaline metal atoms; a pump light source configured to provide circularly polarized pump beams to the vapor cell; an irradiation light source configured to provide linearly polarized irradiation beams to the vapor cell; a magnetic signal detecting unit configured to detect a magnetic signal by measuring a polarization rotation angle from the linearly polarized irradiation beam passing through the vapor cell; and a bias magnetic field control unit configured to control a bias magnetic field applied to the vapor cell.

公开(公告)号：US20240120658A1

公开(公告)日：2024-04-11

申请号：US18377009

申请日：2023-10-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： In Kui CHO ,  Jang Yeol KIM ,  Jung Hoon OH ,  Hyun Joon LEE

IPC: H01Q15/00 ,  H01Q7/00

CPC classification number: H01Q15/0013 ,  H01Q7/00 ,  H01Q15/006

Abstract: An exemplary embodiment provides a signal receiver device capable of detecting a radio communication signal with a high signal-to-noise ratio while internally canceling an environmental noise. A signal receiver device according to an exemplary embodiment includes a first signal detection element; and a second signal detection element electrically connected to the first signal detection element and provided with a blocking member for attenuating a communication signal among received RF signals. The signal receiver device is configured to output a difference between a first detection signal detected by the first signal detection element and a second detection signal detected by the second signal detection element as a detected receive signal.

公开(公告)号：US20230135487A1

公开(公告)日：2023-05-04

申请号：US17978255

申请日：2022-11-01

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Hoon OH ,  Jang Yeol KIM ,  Jae Ho LEE ,  Hyun Joon LEE ,  In Kui CHO

IPC: H01Q21/24 ,  H01Q15/24

Abstract: An operation method of a first communication node may comprise: receiving one or more polarized radio signals transmitted from a second communication node included in the communication system through one or more receive polarized antennas included in the first communication node; performing a receive polarized antenna alignment state adjustment operation so that a detection result for a magnitude of an electric field excited by the one or more polarized radio signals is maximized; and receiving a first polarized signal transmitted from the second communication node through at least part of the one or more receive polarized antennas based on a result of the receive polarized antenna alignment state adjustment operation.