US 11,056,770 B2
Multi-antenna system and electronic device thereof
Saou-Wen Su, Taipei (TW); and Wei-Hsuan Chang, Taipei (TW)
Assigned to ASUSTEK COMPUTER INC., Taipei (TW)
Filed by ASUSTeK COMPUTER INC., Taipei (TW)
Filed on Dec. 10, 2019, as Appl. No. 16/708,593.
Claims priority of application No. 107146012 (TW), filed on Dec. 19, 2018.
Prior Publication US 2020/0203808 A1, Jun. 25, 2020
Int. Cl. H01Q 1/38 (2006.01); H01Q 1/24 (2006.01); H01Q 9/04 (2006.01); H01Q 9/42 (2006.01); H01Q 5/378 (2015.01)
CPC H01Q 1/243 (2013.01) [H01Q 1/38 (2013.01); H01Q 5/378 (2015.01); H01Q 9/0421 (2013.01); H01Q 9/42 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A multi-antenna system, comprising a high-frequency operating frequency and a low-frequency operating frequency, wherein the multi-antenna system comprises:
a conductive plane, comprising four adjacent sides;
a main antenna unit, disposed on one of the four sides;
a first secondary antenna unit, disposed on one of the four sides and apart from the main antenna unit by a spacing, wherein the spacing is greater than 0.5 times a wavelength of the low-frequency operating frequency;
a second secondary antenna unit, disposed on one of the four sides except the side on which the main antenna unit is disposed;
a switching circuit, disposed on the conductive plane and selectively electrically connected to the first secondary antenna unit or the second secondary antenna unit; and
a wireless communications module, disposed on the conductive plane and electrically connected to the switching circuit and the main antenna unit, wherein
when the switching circuit is electrically connected to the first secondary antenna unit, the main antenna unit and the first secondary antenna unit constitute a first antenna combination; when the switching circuit is electrically connected to the second secondary antenna unit, the main antenna unit and the second secondary antenna unit constitute a second antenna combination; and when a radio frequency signal is fed to the second antenna combination, a polarization direction of a radiation pattern generated by the second secondary antenna unit is orthogonal to a polarization direction of a radiation pattern generated by the main antenna unit.