US 12,218,433 B2
Communication apparatus for vehicle and control method therefor
Jin Ho Yoon, Seoul (KR); Seung Hyun Yang, Seoul (KR); and Tae Sup Choi, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/758,368
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Dec. 31, 2020, PCT No. PCT/KR2020/019469
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2021/137649, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 10-2020-0000444 (KR), filed on Jan. 2, 2020.
Prior Publication US 2023/0027539 A1, Jan. 26, 2023
Int. Cl. H01Q 3/24 (2006.01); H01Q 1/32 (2006.01); H04B 1/04 (2006.01); H04B 7/06 (2006.01)
CPC H01Q 3/24 (2013.01) [H01Q 1/32 (2013.01); H04B 1/0483 (2013.01); H04B 7/0691 (2013.01); H04B 2001/0433 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A communication apparatus for a vehicle, comprising:
an antenna unit including a first antenna and a plurality of second antennas;
a first switch circuit configured to switch between a first path to the first antenna and a second path to one of the plurality of second antennas;
a second switch circuit configured to switch the second path to one of the plurality of second antennas, and connected to the first switch circuit;
a length adjustment unit disposed on the second path, and configured to adjust a resonance length of the connected second antenna; and
a communication control unit configured to generate a switching signal for controlling the first switch circuit and the second switch circuit to be connected to a second antenna from the plurality of second antennas according to a status of the first antenna,
wherein when the first antenna does not operate normally, the communication control unit is configured to:
detect levels of received signals by sequentially connecting with each of the plurality of second antennas,
compare the levels of the received signals of the connected second antennas,
select the connected second antenna corresponding to a highest level of the received signal,
generate the switching signal for adjusting the resonance length of the selected second antenna, and
connect the selected second antenna and circuit by the generated switching signal.