System and method for implementing frequency band compatibility

Abstract

The invention discloses a system and a method for achieving frequency band compatibility. The system comprises a PCB and a frequency band compatible circuit, wherein the frequency band compatible circuit comprises a transceiver, a central processor, an antenna, an antenna switch, a first duplexer, a second duplexer, a single-pole double-throw switch and two short-circuit welding pads, wherein both ends of the transceiver are connected with two output ports of differential output signals of the single-pole double-throw switch, both ends of a first differential input end in the single-pole double-throw switch are connected with two output ends of the differential output signals of the single-pole double-throw switch separately through one of the independent short-circuit welding pads, two ports of the first differential input end in the single-pole double-throw switch are connected with the first duplexer, two ports of a second differential input end in the single-pole double-throw switch are connected with the second duplexer, output ends of the two duplexers are connected with the antenna through the antenna switch, and the central processor is connected with the single-pole double-throw switch. The system and the method achieve coexistence of two frequency bands truly, and ensure the RF performance.

Description

technical field [0001] The invention relates to a compatible method, in particular to a system and method for realizing frequency band compatibility. Background technique [0002] With the rapid development of modern communication technology, mobile communication has developed from the initial analog technology to the current 4G LTE era, with higher and higher data transmission rates, more and more adjustment systems and supported frequency bands. [0003] However, different countries or regions support different LTE frequency bands. The commonly used LTE frequency bands in Europe are band3, band7, and band20. The commonly used LTE frequency bands in South America are band4, band7, and band17. Some operators will use band28. Therefore, in order to meet the needs of different customers, frequency band compatibility becomes very necessary. However, the number of receiving ports at the transceiver end is limited, the PCB layout area is particularly tight, and the RF wiring is p...

AI Technical Summary

Problems solved by technology

Therefore, in order to meet the needs of different customers, frequency band compatibility becomes very necessary. However, the number of receiving ports at the transceiver end is limited, the PCB layout area is particularly tight, and the RF wiring is particularly prone to interference due to compatibility, making current frequency band compatibility difficult.

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