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公开(公告)号：US12206177B2
公开(公告)日：2025-01-21
申请号：US17978255
申请日：2022-11-01
Inventor： Jung Hoon Oh , Jang Yeol Kim , Jae Ho Lee , Hyun Joon Lee , In Kui Cho
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.
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公开(公告)号：US11782107B2
公开(公告)日：2023-10-10
申请号：US17538288
申请日：2021-11-30
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
CPC classification number: 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.
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公开(公告)号：US11804874B2
公开(公告)日：2023-10-31
申请号：US17734286
申请日：2022-05-02
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
CPC classification number: H04B5/0031 , H04B5/0081 , H04B5/0087
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.
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