US 11,870,484 B2
Wireless communication system having dual-band coexistence architecture
Chen-Mao Rao, Hsinchu (TW); Li-Yuan Chang, Hsinchu (TW); and Yu-Fang Chang, Hsinchu (TW)
Assigned to WISTRON NEWEB CORPORATION, Hsinchu (TW)
Filed by WISTRON NEWEB CORPORATION, Hsinchu (TW)
Filed on Oct. 25, 2021, as Appl. No. 17/509,108.
Claims priority of application No. 110123236 (TW), filed on Jun. 25, 2021.
Prior Publication US 2022/0416836 A1, Dec. 29, 2022
Int. Cl. H04B 1/52 (2015.01); H04B 1/401 (2015.01); H04W 72/0453 (2023.01)
CPC H04B 1/52 (2013.01) [H04B 1/401 (2013.01); H04W 72/0453 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A wireless communication system having a dual-band coexistence architecture, comprising:
a processing circuit;
a first transceiver connected to the processing circuit;
a first front-end module connected to the first transceiver;
a first switch circuit connected to the first front-end module and the processing circuit;
a first filter connected the first switch circuit and having a first pass band;
a second filter connected the first switch circuit and having a second pass band, wherein the first pass band has a lower frequency range than the second pass band, the first pass band and the second pass band are adjacent to jointly cover a first frequency band, and the first switch circuit is controlled by the processing circuit to connect the first front-end module to the first filter or the second filter;
a second switch circuit connected to the first filter, the second filter, and the processing circuit;
a first antenna connected to the second switch circuit, wherein the second switch circuit is controlled by the processing circuit to connect the first antenna to the first filter or the second filter;
a second transceiver connected to the processing circuit;
a second front-end module connected to the second transceiver;
a third switch circuit connected to the second front-end module and the processing circuit;
a third filter connected to the third switch circuit and having a third pass band;
a fourth filter connected to the third switch circuit and having a fourth pass band, wherein the third pass band has a lower frequency range than the fourth pass band, the third pass band is adjacent to the fourth pass band to jointly cover a second frequency band, the second frequency band has a higher frequency range than the first frequency band, and the third switch circuit is controlled by the processing circuit to connect the second front-end module to the third filter or the fourth filter;
a fourth switch circuit connected to the third filter, the fourth filter, and the processing circuit; and
a second antenna connected to the fourth switch circuit, wherein the fourth switch circuit is controlled by the processing circuit to connect the second antenna to the third filter or the fourth filter;
wherein there is a band gap between the first frequency band and the second frequency band, the second filter has a first out-of-band attenuation value at a junction of the band gap and the second frequency band, and the third filter has a second out-of-band attenuation value at a junction of the band gap and the first frequency band;
wherein the processing circuit is configured to execute a channel selection procedure, including:
confirming a designated channel used for communication with user equipment and a designated frequency band corresponding to the designated channel; and
controlling the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit to select one of the first pass band, the second pass band, the third pass band, and the fourth pass band according to the designated frequency band.