CN210958363U

CN210958363U - Radio frequency system for realizing multiple CA combinations

Info

Publication number: CN210958363U
Application number: CN202020037532.3U
Authority: CN
Inventors: 王斌坚; 王新
Original assignee: Shenzhen Qikai Electronic Co ltd
Current assignee: Shenzhen Qikai Electronic Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-07-07
Anticipated expiration: 2030-01-08

Abstract

The utility model discloses a radio frequency system for realizing various CA combinations, relating to the technical field of communication; the MIMO antenna system comprises a Phase II radio frequency module, a coupling separation module, a secondary level switch separation module and an MIMO antenna array; the Phase II radio frequency module comprises a Phase II radio frequency device body, a radio frequency combiner and a first radio frequency switch module connected with the radio frequency combiner; the coupling separation module comprises a second radio frequency switch module; the secondary stage switch separation module comprises a radio frequency coupler and a third radio frequency switch module connected with the radio frequency coupler, and the Phase II radio frequency module and the secondary stage switch separation module are both connected with the MIMO antenna array; the utility model has the advantages that: the radio frequency system realizes the design of various CA radio frequency schemes by the link construction of a Phase II radio frequency device body, a radio frequency combiner, a radio frequency switch and a radio frequency coupler.

Description

Radio frequency system for realizing multiple CA combinations

Technical Field

The utility model relates to the field of communication technology, more specifically the utility model relates to a radio frequency system for realizing multiple CA combination.

Background

Before the current mobile communication 5G networking technology completely advances to SA, the 4G CA technology still has a very large practical space, and compared with the traditional 4G communication, the CA can expand the transmission bandwidth of a communication system and further improve the transmission rate of information.

Most of the traditional CA radio frequency schemes are realized based on a Phase III architecture, but Phase III radio frequency devices mostly depend on European and American mainstream device suppliers, supply is limited, and meanwhile, the cost is high; the combination of CAs realized based on Phase II traditional architecture is relatively limited, which results in that domestic Phase II rf device suppliers have no place to use, and the stock accumulation falls into the technical application dilemma.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a radio frequency system for realizing multiple CA combination, this radio frequency system passes through Phase II radio frequency module, coupling separation module, secondary level switch separation module and the cooperation of MIMO antenna array, realizes the design of the radio frequency system of multiple CA combination.

The utility model provides a technical scheme that its technical problem adopted is: in a radio frequency system for implementing multiple CA combinations, the improvement comprising: the MIMO antenna system comprises a Phase II radio frequency module, a coupling separation module, a secondary level switch separation module and an MIMO antenna array;

the Phase II radio frequency module comprises a Phase II radio frequency device body, a radio frequency combiner and a first radio frequency switch module connected with the radio frequency combiner;

the coupling separation module comprises a second radio frequency switch module;

the secondary stage switch separation module comprises a radio frequency coupler and a third radio frequency switch module connected with the radio frequency coupler, and the Phase II radio frequency module and the secondary stage switch separation module are both connected with the MIMO antenna array.

In the above structure, the first rf switch module is a single-pole double-throw switch module, the rf combiner and the single-pole double-throw switch module are used to implement an LTE diversity downlink receive link, and the rf combiner cooperates with the single-pole double-throw switch module to implement various interband downlink CA combinations of LTE frequency bands B8+ B41, B39+ B41, B3+ B41, and B1+ B3.

In the above structure, the second rf switch module is a double-pole double-throw switch module, and the power detection coupling loop cascade between the Phase II rf module and the secondary switch separation module is separated to improve co-channel interference introduced by higher harmonics caused by the power detection loop cascade, and improve throughput performance of multiple interband downlink CA combinations.

In the structure, the third radio frequency switch module is a single-pole multi-throw switch module, is used for separating different frequency bands of LTE, is combined with the Phase II radio frequency device body, and is used for realizing an LTE master set downlink, and through controlling the single-pole multi-throw switch module, multiple inter-band downlink CA combinations between different frequency bands in LTE are realized.

In the above structure, the Phase II radio frequency module and the secondary stage switch separation module are connected to the MIMO antenna array to complete various inter-band downlink CA combinations between different frequency bands.

The utility model has the advantages that: the method comprises the following steps of constructing a radio frequency link by using a Phase II radio frequency device body, a radio frequency combiner, a radio frequency switch, a radio frequency coupler and the like, and realizing downlink carrier aggregation among frequency bands with wider intervals, such as radio frequency Double Middle Band, High Band + Middle Band and Low Band + High Band; the advantages of this scheme are: on one hand, different frequency bands can be arbitrarily split or combined by utilizing the Phase II module and the secondary level switch separation module, so that the flexibility of frequency band combination can be increased, the debugging difficulty of the antenna at the whole machine end is reduced, the design cost is reduced, the purpose of realizing various CA combinations is achieved, and the core competitiveness of a product is increased.

Drawings

Fig. 1 is a system block diagram of a radio frequency system for implementing multiple CA combinations according to the present invention.

Fig. 2 is a circuit diagram of a radio frequency combiner and a first radio frequency switch module of a radio frequency system for implementing multiple CA combinations according to the present invention.

Fig. 3 is a circuit diagram of a second rf switch module of the rf system for implementing multiple CA combinations according to the present invention.

Fig. 4 to fig. 5 are circuit diagrams of a third rf switch module of the rf system for implementing multiple CA combinations according to the present invention.

Fig. 6 to 7 are circuit diagrams of MIMO antenna connections of a radio frequency system for implementing multiple CA combinations according to the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

The utility model discloses a radio frequency system for realizing multiple CA combination, this system realizes multiple CA combination radio frequency scheme design through material nimble lectotypes such as Phase II radio frequency device body, radio frequency combiner, radio frequency switch, radio frequency coupler, wherein CA be Carrier Aggregation (Carrier Aggregation) for short for.

Referring to fig. 1 to 7, the radio frequency system includes a Phase II radio frequency module 10, a coupling separation module 20, a secondary stage switch separation module 30, and a MIMO antenna array 40; the Phase II radio frequency module 10 includes a Phase II radio frequency device body, a radio frequency combiner 101, and a first radio frequency switch module 102 connected to the radio frequency combiner 101; the coupling and decoupling module 20 includes a second rf switch module 201; the secondary stage switch separation module 30 includes a radio frequency coupler 301 and a third radio frequency switch module 302 connected to the radio frequency coupler 301, and the Phase II radio frequency module 10 and the secondary stage switch separation module 30 are both connected to the MIMO antenna array 40. In this embodiment, a Phase II radio frequency device body, a radio frequency combiner 101, a radio frequency switch, a radio frequency coupler 301, and the like are used to construct a radio frequency link, so as to implement downlink carrier aggregation between frequency bands with relatively wide intervals, such as radio frequency double Band, High Band + Middle Band, and Low Band + High Band.

As shown in fig. 2, the first rf switch module 102 is a single-pole double-throw switch module, the rf combiner 101 and the single-pole double-throw switch module are used to implement an LTE diversity downlink receiving link, and the rf combiner 101 cooperates with the single-pole double-throw switch module to implement various interband downlink CA combinations of LTE intermediate frequency bands B8+ B41, B39+ B41, B3+ B41, and B1+ B3. Further, the radio frequency combiner includes a chip U2317, in this embodiment, the model of the chip U2317 is ACX, TP2520-a081926CAT/LF, the first radio frequency switch module 102 includes a chip U2316, in this embodiment, the model of the chip U2316 is maxscan, MXD 8626C;

as shown in fig. 3, the second rf switch module 201 is a double-pole double-throw switch module; the double-pole double-throw switch module is applied to cascade of power detection coupling loops between the separation Phase I module 10 and the secondary switch separation module 30, and the circuit network is applied to detect the power at the port of the radio frequency antenna in real time, so as to dynamically adjust the power of the radio frequency power amplifier module in real time. When the radio frequency power amplifier module works in a certain frequency band of middle and low frequencies, the RFI1 is communicated with the RFO 2; when the radio frequency power amplifier module works in a certain high-frequency band, the RFI2 is communicated with the RFO2, so that the accurate detection and dynamic power adjustment of a radio frequency system are ensured when the radio frequency power amplifier module works in the corresponding frequency band. In addition, the switch can separate direct cascade connection when the radio frequency coupler 301 builds a power detection coupling loop, so that the increased isolation can obviously improve the same frequency interference introduced by higher harmonics caused by cascade connection of the power detection loop, and improve the throughput performance of various interband downlink CA combinations. In this embodiment, the second rf switch module 201 includes a chip U2209, and specifically, the model of the chip 2209 is maxsblend, MXD 8546C.

As shown in fig. 4 and 5, the point a in fig. 4 is electrically connected to the point B in fig. 5, and the circuit constructed by the rf coupler 301 and the third rf switch module 302 is applied to an LTE high frequency transmitting circuit, wherein the LTE high frequency includes frequency bands B40, B41, and B7. As shown in fig. 4 to 7, a radio frequency front-end system constructed based on a Phase II radio frequency device body, a radio frequency combiner, a radio frequency switch, a radio frequency coupler, and the like can implement transmission and reception of signals of different arbitrary frequency bands in the radio frequency system. The separation of the medium-Low frequency antenna (ANT1) and the High-frequency antenna (ANT9) enables signals of different arbitrary frequency bands to be coupled at a spatial antenna port simultaneously, so as to realize downlink carrier aggregation between frequency bands with wider intervals, such as Double Middle Band, High Band + Middle Band, and Low Band + High Band, at the receiving end of the LTE master set. The secondary switch separation module comprises a chip U2212, a chip U2221 and a chip U2210, wherein the U2212 is ACX in model number, and BF1608-L2R3 NDAT/LF; the specific model of the chip U2221 is Maxscan, MXD 8680; the specific model of the chip U2210 is ACX, CP1608-25Q 0822T/LF.

The system adopts a method different from the traditional Phase III radio frequency architecture to realize downlink CA, utilizes a Phase II radio frequency device body, a radio frequency combiner, a radio frequency switch, a radio frequency coupler and the like to build a radio frequency link, and realizes downlink carrier aggregation among frequency bands with wider intervals, such as radio frequency Double Middle Band, High Band + Middle Band and Low Band + High Band; the advantages of this scheme are: on one hand, the flexibility of the radio frequency coupler and the radio frequency switch is utilized to split the radio frequency coupler and the radio frequency switch into any frequency band combination, so that a plurality of different CA combinations are realized; and on the other hand, the combination of multiple frequency bands can reduce the debugging difficulty of the antenna at the whole machine end and increase the core competitiveness of the product. Of course, the scheme has the advantages of reducing the dependence on main device manufacturers in Europe and America and ensuring that the supply chain materials of domestic devices occupy certain initiative in technical type selection.

The above embodiments of the present invention are described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.

Claims

1. A radio frequency system for implementing multiple CA combinations, characterized by: the MIMO antenna system comprises a Phase II radio frequency module, a coupling separation module, a secondary level switch separation module and an MIMO antenna array;

2. The radio frequency system of claim 1, wherein the radio frequency system is further configured to: the first radio frequency switch module is a single-pole double-throw switch module, the radio frequency combiner and the single-pole double-throw switch module are used for realizing an LTE diversity downlink receiving link, and the radio frequency combiner is matched with the single-pole double-throw switch module to realize various interband downlink CA combinations of LTE intermediate frequency bands B8+ B41, B39+ B41, B3+ B41 and B1+ B3.

3. A radio frequency system for implementing multiple CA combinations according to claim 2, wherein: the second radio frequency switch module is a double-pole double-throw switch module, and the power detection coupling loop cascade between the Phase II radio frequency module and the secondary level switch separation module is separated, so that the co-frequency interference caused by higher harmonics caused by the power detection loop cascade is improved, and the throughput performance of various interband downlink CA combinations is improved.

4. A radio frequency system for implementing multiple CA combinations according to claim 2, wherein: the third radio frequency switch module is a single-pole multi-throw switch module, is used for separating different frequency bands of LTE, is combined with the Phase II radio frequency device body, is used for realizing an LTE main set downlink, and realizes various interband downlink CA combinations among different frequency bands in the LTE through controlling the single-pole multi-throw switch module.

5. The radio frequency system of claim 1, wherein the radio frequency system is further configured to: the Phase II radio frequency module and the secondary level switch separation module are connected with the MIMO antenna array to complete various interband downlink CA combinations among different frequency bands.