Dual-antenna radio frequencyfront-end module

A radio frequency front-end, dual-antenna technology, applied in the field of dual-antenna radio frequency front-end modules, to achieve the effect of increasing output power

CN109257064AInactive Publication Date: 2019-01-22TIANJIN JINHANG COMP TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of data link wireless communication, in particular to a dual-antenna radio frequency front-end module based on the principle structure of the internal dual-antenna working mode of a full-duplex radio frequency front-end. In this module, the output power of the upper and lower antennas at a certain frequency point is controlled by phase shifter, and thetransmit power is synthesized by phase shifter. All the frequency points covered by the upper and lower antennas are distinguished by two different groups of cavity filters in the form of high and lowbands. The filters in high and low bands have a high degree of suppression and can achieve full-duplex operation. In the receiving part of the high-power limiter can ensure that in the antenna port open state, when the high-power signal is totally reflected, the receiving circuit can be protected, and the high-power signal is reflected to the load port. The limiter is used to prevent high power signals from entering the receive link and to protect the receive channel components.
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Description

technical field

[0001] The invention belongs to the technical field of data link wireless communication, and specifically relates to a dual-antenna radio-frequency front-end module based on the principle structure of a full-duplex radio-frequency front-end internal dual-antenna working mode. Background technique

[0002] In the data link wireless communication link, the RF front-end module, as an essential component, plays a pivotal role. In the design process of the RF front-end module, the dual-antenna working mode is also quite common. Generally, the mode of switching between two antennas is used to realize it. Of course, there is also a working mode in which dual antennas radiate and receive signals at the same time. According to the difference between half-duplex communication and full-duplex communication, the circuit design method of the RF front-end module is also different. The half-duplex communication mode is time-sharing for sending and receiving information, a...

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Embodiment Construction

[0022] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] This embodiment proposes a dual-antenna RF front-end module, the circuit principle of which is as follows image 3 shown. The RF front-end module includes a power divider 1, a phase shifter 2, a booster amplifier 3, a final amplifier 4, an isolator 5, a high-power bridge 6, a circulator 7, a cavity filter 8, an antenna 9, and a limiter 10. Low noise amplifier 11 and temperature compensation attenuator 12.

[0024] The radio frequency front-end module mainly includes two signals of branch 1 and branch 2, and the two signals are coupled into different branches at the high-power bridge 6 . The RF signal of the input branch 1 enters two different amplifying circuits through the power divider 1, and the phase of eac...