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Radio frequency front-end frequency selection circuit and signal receiving method thereof

A technology of frequency selection circuit and radio frequency front-end, which is applied in electrical components, transmission systems, etc., can solve the problems of increasing the design difficulty of the front-end multiplexer, large equipment size, and increasing the size of the multiplexer, and achieve consistent processing. Good performance, improved production efficiency, flexible design effect

Active Publication Date: 2016-05-04
GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

These two solutions both focus on the RF front-end circuit architecture integrating multi-mode and multi-band transceivers in home micro base stations or handheld devices. With the increase of frequency bands, the difficulty of designing front-end multiplexers will gradually increase. The volume scale will also continue to increase with the expansion of the frequency band, so the volume of the equipment is relatively large

Method used

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  • Radio frequency front-end frequency selection circuit and signal receiving method thereof
  • Radio frequency front-end frequency selection circuit and signal receiving method thereof
  • Radio frequency front-end frequency selection circuit and signal receiving method thereof

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0032] The traditional RF front-end frequency selection circuit such as figure 1 As shown, the circuit uses a multiplexer + switch to achieve frequency selection. With the increase of the frequency selection network at the front end of the receiver, the volume of the circuit will become larger and larger, which is not conducive to integration and high cost.

[0033] The present invention proposes a radio frequency front-end frequency selection circuit based on a microstrip filter. Part, the following according to different applications, combined with figure 2 , 3 , 4 Explain the specific application of the above circuit.

[0034] see figure 2 , the circuit is suitable for time-sharing single-channel frequency selection. There is only one antenna in the circuit. The...

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Abstract

The invention discloses a radio frequency front-end frequency selection circuit and a signal receiving method thereof. The circuit comprises: an antenna used for coupling and receiving a radio frequency signal; a first multipath switch used for selecting the radio frequency signal to a microstrip filter of a corresponding frequency band; the microstrip filter used for filtering an out-of-band interference signal; a low noise amplifier used for amplifying the useful radio frequency signal; and a filter group used for filtering the amplified signal; a second multipath switch used for switching the radio frequency signal obtained by the filter group to a subsequent link of a receiver to be processed. The method comprises the steps that: the radio frequency signal is coupled to a radio frequency link by the antenna, the first multipath switch switches the radio frequency signal to the microstrip filter of the corresponding frequency band, the microstrip filter filters the out-of-band interference signal and amplifies and filters the useful signal for the second time, and finally the signal is switched to the subsequent link of the receiver to be processed. The radio frequency front-end frequency selection circuit disclosed by the invention has the advantages of miniaturization, integration and strong expansibility.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a radio frequency front-end frequency selection circuit and a signal receiving method thereof. The circuit can be applied to occasions where multi-frequency bands and multi-standard communication networks coexist and are applied simultaneously. Background technique [0002] With the rapid development of wireless mobile communication, communication networks of various standards have been rapidly applied and developed, and 2G, 3G and LTE protocol standards and their networks have also appeared and been applied one after another. At present, communication networks with multiple standards and different frequency bands coexist and apply simultaneously in the market. In order to meet the diversified needs of users, the receiver needs to support more and more multi-mode and multi-band application scenarios, which brings challenges to the design of the RF frequency selec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/18H04B1/44
CPCH04B1/18H04B1/44
Inventor 况佳
Owner GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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