US 12,230,886 B2
Low band antenna device
Sung-Mao Liao, Taipei (TW); and Chien-Ming Hsu, Taipei (TW)
Assigned to ASUSTEK COMPUTER INC., Taipei (TW)
Filed by ASUSTeK COMPUTER INC., Taipei (TW)
Filed on Nov. 7, 2022, as Appl. No. 17/981,607.
Claims priority of application No. 111125976 (TW), filed on Jul. 11, 2022.
Prior Publication US 2024/0014575 A1, Jan. 11, 2024
Int. Cl. H01Q 21/30 (2006.01); H01Q 1/24 (2006.01)
CPC H01Q 21/30 (2013.01) [H01Q 1/243 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A low band antenna device, arranged on a folding screen electronic device, wherein the folding screen electronic device comprises a first casing and a second casing that are foldable, and the low band antenna device comprises:
a first antenna, located on the first casing;
a second antenna, located on the first casing and kept separated from the first antenna;
a third antenna, located on the second casing, and corresponding to the second antenna;
a fourth antenna, located on the second casing and kept separated from the third antenna, wherein the fourth antenna corresponds to the first antenna,
wherein when the folding screen electronic device is in an open mode, the first antenna, the second antenna, the third antenna, and the fourth antenna all maintain a normal working state; and when the folding screen electronic device is in a close mode, one of the first antenna and the fourth antenna and one of the second antenna and the third antenna maintain the normal working state, and the remaining antennas are in a detuned and disabled state;
a first matching circuit, connected to the first antenna;
a first detuning circuit, connected to the first matching circuit;
a second matching circuit, connected to the second antenna;
a second detuning circuit, connected to the second matching circuit;
a third matching circuit, connected to the third antenna;
a third detuning circuit, connected to the third matching circuit;
a fourth matching circuit, connected to the fourth antenna;
a fourth detuning circuit, connected to the fourth matching circuit; and
a switch circuit, connected to the first matching circuit, the first detuning circuit, the second matching circuit, the second detuning circuit, the third matching circuit, the third detuning circuit, the fourth matching circuit, and the fourth detuning circuit, wherein when the folding screen electronic device is in the close mode, through switching of the switch circuit, the first detuning circuit or the fourth detuning circuit and the second detuning circuit or the third detuning circuit receive a disabled signal, so that the remaining first antenna or the remaining fourth antenna and the remaining second antenna or the remaining third antenna are in the detuned and disabled state.