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Radio frequency circuit and interference suppression method

A radio frequency circuit and radio frequency front-end technology, applied in the radio frequency field, can solve the problems affecting the LTEB3 receiving performance, the main set receiving signal interference, etc., to achieve the effect of improving the receiving sensitivity, reducing the interference, and enhancing the interaction ability

Active Publication Date: 2016-07-13
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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Problems solved by technology

[0006] However, for figure 1 For the mobile terminal shown, if the frequencies of the LTEB1 frequency band and the LTEB3 frequency band are very close or are frequency bands with a multiplier relationship, a large part of the main set transmit signal of the LTEB1 frequency band will be fed back to the main set of the LTEB3 frequency band. Receive path , thus causing interference to the main set receiving signal in the LTEB3 frequency band, and finally affecting the LTEB3 receiving performance of the entire mobile terminal

Method used

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  • Radio frequency circuit and interference suppression method
  • Radio frequency circuit and interference suppression method

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Embodiment Construction

[0030] Various embodiments are now described with reference to the drawings, wherein like elements are designated with like reference numerals. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the described embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0031] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, the terms "first", "second" are limited to Two" features may explicitly or implicitly include one or more of these features. In the following embodiments, "first" and "second" are only used...

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Abstract

The embodiment of the invention provides a radio frequency circuit and an interference suppression method, and aims at suppressing interference of transmitting signals of one frequency band of a master set antenna on receiving signals of another frequency band at least. The radio frequency circuit comprises the master set antenna, a radio frequency front-end module, a first anti-phase attenuation module and a first circuit combining module. The master set antenna is configured to receive master set receiving signals of the first frequency band and transmit master set transmitting signals of the second frequency band. The first anti-phase attenuation module is used for receiving master set transmitting power detection signals of the second frequency band transmitted by the radio frequency front-end module and performing phase reversing and first attenuation processing on the master set transmitting power detection signals of the second frequency band so as to obtain first anti-phase attenuation signals. The first circuit combining module is used for receiving and combining the master set receiving signals of the first frequency band, the master set transmitting signals of the second frequency band and the first anti-phase attenuation signals so as to obtain first combining signals. The radio frequency circuit and the interference suppression method are suitable for the technical field of radio frequency.

Description

technical field [0001] The invention relates to the field of radio frequency technology, in particular to a radio frequency circuit and an interference suppression method. Background technique [0002] With the rapid development of long-term evolution (English full name: longtermevolution, English abbreviation: LTE) technology, more and more mobile terminals support carrier aggregation (English full name: carrier aggregation, English abbreviation: CA) function, and the supported frequency bands are also increasing. There are many, and the interference environment is more complicated. Especially in the case of carrier aggregation with close frequency or frequency multiplier relationship, the interference will be more obvious and the impact will be greater. [0003] for example, figure 1 It is a functional block diagram of a mobile terminal supporting LTEB1+B3 dual downlink carrier aggregation function. The mobile terminal uses two transceivers to realize the carrier aggreg...

Claims

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Application Information

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IPC IPC(8): H04B1/525H04B1/10
CPCH04B1/10H04B1/525
Inventor 高一伦王国涛赵科
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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