US 12,451,909 B1
Inter-band carrier aggregation circuit
Xiaofei Fan, Jiaxing (CN); Xuexiao Jin, Jiaxing (CN); Dejin Zhu, Jiaxing (CN); Daijun Liu, Jiaxing (CN); Wei Zhang, Jiaxing (CN); and Shenglei Xiao, Jiaxing (CN)
Assigned to Tiantong Ruihong Technology Co., Ltd., Jiaxing (CN)
Filed by Tiantong Ruihong Technology Co., Ltd., Jiaxing (CN)
Filed on Jan. 17, 2025, as Appl. No. 19/027,203.
Claims priority of application No. 202410773428.3 (CN), filed on Jun. 17, 2024.
Int. Cl. H04B 1/52 (2015.01); H04B 1/00 (2006.01)
CPC H04B 1/0078 (2013.01) [H04B 1/0057 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An inter-band carrier aggregation circuit, comprising a radio frequency transceiver, a power amplifier module, a signal filtering module, an antenna switch and an antenna, wherein,
the power amplifier module is connected in series between the radio frequency transceiver and the signal filtering module, and the power amplifier module is configured to perform an amplification processing on a carrier aggregation signal output by the radio frequency transceiver to obtain an aggregate amplified signal, wherein the carrier aggregation signal comprises signals of at least two different frequency bands; and
the signal filtering module is connected in series between the power amplifier module and the antenna switch, the antenna switch is connected to the antenna, the signal filtering module comprises at least one multiplexer integrated by at least two single-frequency-band duplexers or filters, a multiplexer of the at least one multiplexer comprises a transmitting end, a receiving end, and an antenna end, and the signal filtering module is configured to filter the aggregate amplified signal and transmit carrier aggregation signal obtained by filtering to the antenna through the antenna switch;
wherein in a case where the carrier aggregation signal comprises two mid-frequency signals, the inter-band carrier aggregation circuit is configured to implement a carrier aggregation between the mid-frequency signals;
the power amplifier module comprises a first power amplifier and a first amplifier switch, and the signal filtering module comprises a first quadruplexer and a second quadruplexer; and
a first end of the first power amplifier is connected to the radio frequency transceiver, a second end of the first power amplifier is connected to a movable end of the first amplifier switch, a first fixed end of the first amplifier switch is connected to a transmitting end of the first quadruplexer, and a second fixed end of the first amplifier switch is connected to a transmitting end of the second quadruplexer.