US 11,916,309 B2
Apparatus and method for transmitting and receiving magnetic field signals in magnetic field communication system
Jaewoo Lee, Daejeon (KR); In Kui Cho, Daejeon (KR); Sang-Won Kim, Daejeon (KR); Seong-Min Kim, Daejeon (KR); Ho Jin Lee, Daejeon (KR); Jang Yeol Kim, Daejeon (KR); Jung Ick Moon, Daejeon (KR); Woo Cheon Park, Daejeon (KR); Je Hoon Yun, Daejeon (KR); Hyunjoon Lee, Busan (KR); and Dong Won Jang, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Dec. 15, 2020, as Appl. No. 17/122,218.
Claims priority of application No. 10-2019-0170751 (KR), filed on Dec. 19, 2019.
Prior Publication US 2021/0194133 A1, Jun. 24, 2021
Int. Cl. H01Q 7/00 (2006.01); G01R 33/36 (2006.01); H04B 5/00 (2006.01); H01Q 1/24 (2006.01)
CPC H01Q 7/005 (2013.01) [G01R 33/3692 (2013.01); H04B 5/0025 (2013.01); H01Q 1/243 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A magnetic field transceiver in a magnetic field communication system, the magnetic field transceiver comprising:
a controller configured to generate communication signals;
matching units configured to receive the communication signals, the matching units respectively corresponding to different matching frequencies; and
loop antennas configured to convert communication signals according to the different matching frequencies into magnetic transmission signals in a form of magnetic field energy and to transmit the magnetic transmission signals, the loop antennas being respectively connected to the matching units, wherein each of the loop antennas has a number of turns equal to: number of turns needed to generate a desired magnetic field/number of loop antennas,
wherein the matching units comprising a first matching unit, a second matching unit and an N matching unit,
wherein the loop antennas are horizontally arranged based on a direction in which another magnetic field transceiver is located, and
wherein the magnetic transmission signals are signals in the form of magnetic field energy which is transmitted to the other magnetic field transceiver by sequentially passing through the loop antenna connected to the first matching unit to the loop antenna connected to the second matching unit to the loop antenna connected to the N matching unit.