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A radio frequency front-end system

A radio frequency front-end and output-end technology, applied in the electronic field, can solve problems such as low integration, high cost, and large area, and achieve the effects of improving integration, reducing the number, and reducing manufacturing costs

Active Publication Date: 2020-09-11
GUANGZHOU HUIZHI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the development of miniaturization of mobile terminal products, the application environment puts forward higher requirements for the package size and integration of RF front-end chips. The existing RF front-end chip designs are as follows: figure 1 As shown, the RF front-end chip is composed of a power amplifier, a receiving filter network, a transmitting filter network and an antenna switch, which has the disadvantages of low integration, high cost and large area.

Method used

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  • A radio frequency front-end system
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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0048] In a half-duplex RF front-end system, signal transmission and reception are performed at different times, and the transmission and reception use the same or different operating frequencies. Both the signal transmission path and the signal reception path need filters to filter out unwanted signals. The transmit filter network is mainly used to suppress stray signals outside the transmit band; the receive filter network is mainly used to suppress strong interference signals outside the receive band to ensure the sensitivity of in-band signal reception. Due to the presence of nonlinear devices in the RF system, the main emission spurious signals are located at the harmonic frequency points of the operating frequency of the RF front-end system. Therefore, in some cases, onl...

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Abstract

The invention discloses a radio frequency front end system. The radio frequency front end system comprises a power amplifier, a trapped wave network, a receiving matching network, a receiving switch circuit and an antenna switch, wherein the input end of the power amplifier serves as a transmitting input end of the radio frequency front end system, and the output end of the power amplifier is connected with the antenna switch via the trapped wave network; the output end of the receiving matching network serves as a receiving output end of the radio frequency front end system, the input end ofthe receiving matching network is connected with one end of the receiving switch circuit, and the other end of the receiving switch circuit is connected with the antenna switch via the trapped wave network; and the receiving switch circuit is used for switching according to the receiving and transmitting state of the radio frequency front end system.

Description

technical field [0001] The invention relates to electronic technology, in particular to a radio frequency front-end system. Background technique [0002] At present, with the development of miniaturization of mobile terminal products, the application environment puts forward higher requirements for the package size and integration of RF front-end chips. The existing RF front-end chip designs are as follows: figure 1 As shown, the RF front-end chip is composed of a power amplifier, a receiving filter network, a transmitting filter network and an antenna switch, which has the disadvantages of low integration, high cost and large area. Contents of the invention [0003] In order to solve the above technical problems, the embodiment of the present invention expects to provide a radio frequency front-end system, which is used to improve the integration degree of the existing radio frequency front-end and realize the miniaturization of the radio frequency front-end. [0004] Te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/401
CPCH04B1/401
Inventor 彭振飞苏强奕江涛李阳李平金海鹏
Owner GUANGZHOU HUIZHI MICROELECTRONICS