CN207052767U - Antenna circuit, coupling module and Wireless Telecom Equipment for antenna conversion - Google Patents

Abstract

The present application discloses an antenna circuit, a coupling module for antenna conversion, and a wireless communication device; the antenna circuit includes: an antenna, a coupling module, and at least two communication modules; the coupling module is electrically connected to at least two communication modules, and can Signal transmission is realized with the antenna, so that the at least two communication modules can share the antenna at the same time, and the at least two communication modules do not interfere with each other when sharing the antenna at the same time.

Description

Antenna circuit, coupling module for antenna conversion and wireless communication equipment

technical field

The utility model relates to the communication field, in particular to an antenna circuit, a coupling module for antenna conversion and wireless communication equipment.

Background technique

The commonly used forms of built-in antennas of general wireless communication equipment are roughly divided into the following three types: IFA (Inverted-F Antenna, inverted F antenna) (for example, PIFA (Planar Inverted-F Antenna, planar inverted F antenna)), LOOP (loop) antenna , monopole antenna; the communication module that needs to use the antenna includes the second generation mobile communication technology (2G), the third generation mobile communication technology (3G), the fourth generation mobile communication technology (4G) or the fifth generation mobile communication technology ( 5G) wireless communication module, GPS (Global Positioning System, global positioning system) module, WIFI (Wireless-Fidelity) module, FM (Frequency Modulation, frequency modulation) module, NFC (Near Field Communication, near field communication) module, etc.

At present, while wireless communication devices are pursuing miniaturization and thinness, there are more and more frequency bands for wireless communication, higher and higher requirements for uplink and downlink rates, and higher and higher requirements for GPS positioning. WIFI frequency bands and The throughput requirements are getting higher and higher, FM still has a strong demand in many international markets, and NFC is more and more widely used. In order to meet various antenna communication requirements required by the market, more antenna requirements need to be implemented in the same wireless communication device. At present, independent antennas need to be configured for each antenna requirement, resulting in a large number of antennas and occupying space. With the development of thinner and lighter wireless communication devices, it is becoming more and more difficult to use more antennas in wireless communication devices of limited size and space to meet various communication requirements.

Utility model content

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

Embodiments of the present application provide an antenna circuit, a coupling module used for antenna conversion, and a wireless communication device, which can enable multiple communication modules to share an antenna at the same time.

An embodiment of the present application provides an antenna circuit, including: an antenna, a coupling module, and at least two communication modules; the coupling module is electrically connected to the at least two communication modules, and can realize signal transmission with the antenna, so that the The at least two communication modules can share the antenna at the same time, and the at least two communication modules do not interfere with each other when sharing the antenna at the same time.

In an exemplary embodiment, the coupling module may include: at least two communication module front-end circuits coupled to each other, one communication module front-end circuit is electrically connected to one communication module, and can realize signal transmission with the antenna.

In an exemplary embodiment, the front-end circuits of the at least two communication modules may be coupled through spatial coupling, or through electrical coupling, or through electrical direct connection plus isolation.

In an exemplary embodiment, the coupling module may include a front-end circuit of a first communication module and a front-end circuit of a second communication module; the at least two communication modules may include a first communication module and a second communication module; the first The communication module is electrically connected to the front-end circuit of the first communication module, and the second communication module is electrically connected to the front-end circuit of the second communication module; the first communication module uses the front-end circuit of the first communication module to utilize the The antenna performs signal transmission; the second communication module uses the antenna to perform signal transmission through the front-end circuit of the second communication module.

In an exemplary embodiment, the front-end circuit of the first communication module may include an inductor, and the front-end circuit of the first communication module may be coupled to the front-end circuit of the second communication module through spatial coupling.

In an exemplary embodiment, the front-end circuit of the second communication module forms a loop with the antenna, and the inductor is arranged at an end of the front-end circuit of the second communication module, at the center of the loop, In order to realize signal transmission between the front-end circuit of the first communication module and the antenna.

In an exemplary embodiment, the at least two communication modules may include: an FM module and an NFC module, and the at least two communication modules may share the antenna through the coupling module to meet low-frequency and low-power communication requirements.

The embodiment of the present application also provides a coupling module for antenna conversion, which is used to electrically connect at least two communication modules, and can realize signal transmission with the antenna. The coupling module includes: at least two communication module front ends coupled to each other circuit, the front-end circuit of a communication module is electrically connected to a communication module, and can realize signal transmission with the antenna, so that the at least two communication modules can share the antenna at the same time, and the at least two communication modules can share the antenna at the same time. The above antennas will not interfere with each other.

In an exemplary embodiment, the front-end circuits of the at least two communication modules may be coupled through spatial coupling, or through electrical coupling, or through electrical direct connection plus isolation.

In an exemplary embodiment, the coupling module may include a front-end circuit of a first communication module and a front-end circuit of a second communication module; the at least two communication modules may include a first communication module and a second communication module; the first The communication module is electrically connected to the front-end circuit of the first communication module, and the second communication module is electrically connected to the front-end circuit of the second communication module; the first communication module uses the front-end circuit of the first communication module to utilize the The antenna performs signal transmission; the second communication module uses the antenna to perform signal transmission through the front-end circuit of the second communication module.

In an exemplary embodiment, the front-end circuit of the first communication module may include an inductor, and the front-end circuit of the first communication module may be coupled to the front-end circuit of the second communication module through spatial coupling.

In an exemplary embodiment, the front-end circuit of the second communication module forms a loop with the antenna, and the inductor is arranged at an end of the front-end circuit of the second communication module, at the center of the loop, In order to realize signal transmission between the front-end circuit of the first communication module and the antenna.

In an exemplary embodiment, the first communication module may be an FM module, the second communication module may be an NFC module, and the first communication module and the second communication module may share all information through the coupling module. The above-mentioned antenna realizes the communication requirement of low frequency and low power.

An embodiment of the present application further provides a wireless communication device, including the above-mentioned antenna circuit.

In the embodiment of the present application, a coupling module is provided between the antenna and at least two communication modules, and at least two communication modules share one antenna at the same time through the coupling module, and at least two communication modules do not interfere with each other when sharing one antenna at the same time. Therefore, it is possible to use a small number of antennas in the same wireless communication device to realize the communication requirements of more antennas, which meets the requirement for the same wireless communication device to realize the communication requirements of more antennas. Moreover, the hardware solution of the present application is mature, reliable and low in cost.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

FIG. 1 is a schematic diagram of an antenna circuit provided in an embodiment of the present application;

FIG. 2 is an example diagram of an antenna circuit provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of two communication modules sharing one antenna at the same time provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of an antenna circuit according to Embodiment 1 of the present application;

FIG. 5 is a schematic diagram of physical realization of Embodiment 1 of the present application;

FIG. 6 is a schematic diagram of antenna debugging in Embodiment 1 of the present application;

FIG. 7 is a schematic diagram of antenna debugging in Embodiment 2 of the present application;

FIG. 8 is a schematic diagram of an antenna circuit according to Embodiment 2 of the present application.

detailed description

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the embodiments described below are only used to illustrate and explain the present application, and are not intended to limit the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

As shown in Figure 1, the embodiment of the present application provides an antenna circuit, including: an antenna 101, at least two communication modules A1, A2, ..., Ai, and a coupling module 102, the coupling module 102 is electrically connected to at least two communication modules A1 , A2, ..., Ai, and can realize signal transmission with the antenna 101, so that at least two communication modules A1, A2, ..., Ai can share the antenna 101 at the same time, and at least two communication modules A1, A2, ..., Ai can simultaneously There is no mutual interference when the antenna 101 is shared. Among them, i is a positive integer. In other words, the coupling module enables at least two communication modules to use one antenna to simultaneously transmit and receive signals or information, and avoid mutual interference between these communication modules.

It should be noted that "electrical connection" in this application may refer to physical connection between objects through wires, circuits, and the like.

An embodiment of the present application provides an antenna circuit. By designing a coupling module between multiple communication modules and an antenna, multiple communication modules can share the antenna at the same time without interfering with each other, thereby solving the problem of simultaneous work when multiple communication modules are required. , the wireless communication device cannot provide enough antenna paths.

Wherein, as shown in FIG. 2, the coupling module 102 may include: at least two mutually coupled communication module front-end circuits B1, B2, ..., Bi, wherein, i is a positive integer, and one communication module front-end circuit is electrically connected to one communication module , and can realize signal transmission with the antenna 101. In Fig. 2, the front-end circuit B1 of the communication module is electrically connected to the communication module A1, and can realize signal transmission with the antenna 101; the front-end circuit B2 of the communication module is electrically connected to the communication module A2, and can realize signal transmission with the antenna 101; the front-end of the communication module The circuit Bi is electrically connected to the communication module Ai, and can realize signal transmission with the antenna 101 . Wherein, the communication module front-end circuits B1, B2 and Bi are coupled to each other.

Wherein, the coupling between the front-end circuits of at least two communication modules may be realized through spatial coupling, or through electrical coupling, or through electrical direct connection plus isolation. For example, when the front-end circuits of at least two communication modules are coupled through spatial coupling, the signal transmission in the form of electromagnetic field can be realized through the spatial placement between the front-end circuits of the communication modules, so that the front-end circuits of each communication module can be obtained from the antenna. The transmitted information or signal, and realizes the signal or information transmission through the antenna. Wherein, when the front-end circuits of at least two communication modules are electrically coupled, they can be connected by using inductive devices, capacitive devices, a combination of inductive-capacitive devices, or integrated circuits rich in the aforementioned three circuit characteristics. When the front-end circuits of at least two communication modules are coupled through electrical direct connection and isolation, they can be connected by inductance, capacitance, resistance or a combination of the three, or an integrated circuit rich in the aforementioned features, and at the same time realize the isolation function.

In an exemplary embodiment, the coupling module may include a front-end circuit of a first communication module and a front-end circuit of a second communication module; at least two communication modules may include a first communication module and a second communication module; the first communication module is electrically connected to the second communication module A communication module front-end circuit, the second communication module is electrically connected to the second communication module front-end circuit; the first communication module uses the antenna to perform signal transmission through the first communication module front-end circuit; the second communication module uses the second communication module front-end circuit The antenna is used for signal transmission.

In an exemplary embodiment, the front-end circuit of the first communication module may include an inductor, and the front-end circuit of the first communication module is coupled to the front-end circuit of the second communication module through spatial coupling.

In an exemplary embodiment, the front-end circuit of the second communication module forms a loop with the antenna, and the inductor of the front-end circuit of the first communication module is arranged at the end of the front-end circuit of the second communication module, at the center of the loop , so as to realize signal transmission between the front-end circuit of the first communication module and the antenna.

In this embodiment, the antenna communication requirements of at least two communication modules can be the same or different; for example, they can be in the same frequency band, or they can be in different frequency bands; of. For example, the communication module can be a 2G wireless communication module, 3G wireless communication module, 4G wireless communication module or 5G wireless communication module, which is used to realize wireless communication functions in different frequency bands; the communication module can also be a GPS module, which is used to realize positioning functions, Or it may be a WIFI module for realizing the network access function, or it may be an FM module for realizing the radio listening function, or it may be an NFC module for realizing the short-distance wireless communication function and the like. However, the present application does not limit the types of communication modules.

In an exemplary embodiment, the at least two communication modules may include: an FM module and an NFC module, and the at least two communication modules share the antenna through a coupling module to meet low-frequency and low-power communication requirements.

The embodiment of the present application also provides a coupling module for antenna conversion, which is used to electrically connect at least two communication modules, and can realize signal transmission with the antenna. The coupling module includes: at least two communication module front ends coupled to each other circuit, the front-end circuit of a communication module is electrically connected to a communication module, and can realize signal transmission with the antenna, so that the at least two communication modules can share the antenna at the same time, and the at least two communication modules can share the antenna at the same time. The above antennas will not interfere with each other.

Wherein, the coupling between the front-end circuits of at least two communication modules may be realized through spatial coupling, or through electrical coupling, or through electrical direct connection plus isolation.

In an exemplary embodiment, the coupling module may include a front-end circuit of a first communication module and a front-end circuit of a second communication module; at least two communication modules include a first communication module and a second communication module; the first communication module is electrically connected to the first The front-end circuit of the communication module, the second communication module is electrically connected to the front-end circuit of the second communication module; the first communication module uses the antenna for signal transmission through the front-end circuit of the first communication module; the second communication module utilizes the front-end circuit of the second communication module The antenna performs signal transmission.

In an exemplary embodiment, the front-end circuit of the first communication module may include an inductor, and the front-end circuit of the first communication module is coupled to the front-end circuit of the second communication module through spatial coupling. Wherein, the front-end circuit of the second communication module and the antenna form a loop, and the inductor in the front-end circuit of the first communication module can be arranged at the end of the front-end circuit of the second communication module, at the center of the loop, to realize the first communication module The front-end circuit utilizes the antenna for signal transmission.

In the following, the case where there are two communication requirements for one antenna is taken as an example to illustrate.

As shown in FIG. 3 , the antenna 301 can cover two frequency bands F1 and F2; two communication modules 302a and 302b are connected to the antenna 301 through front-end circuits 303a and 303b of the communication modules respectively. The communication module 302a can directly select the frequency band required by itself through matching, such as the frequency band F2. At this time, the communication module front-end circuit 303a of the communication module 302a is designed as a corresponding matching circuit; The front-end circuit 303a of the communication module is coupled to realize the simultaneous sharing of the antenna 301, so as to obtain the desired frequency band, such as the frequency band F1. In addition, the design of the front-end circuits 303a and 303b of the communication modules needs to consider the degree of isolation, so that the communication modules 302a and 302b do not interfere with each other when they share the antenna 301 at the same time. That is, when the communication module 302a uses the antenna 301 to send and receive information or signals, it does not affect the communication module 302b to use the antenna 301 to send and receive signals or information; when the communication module 302b uses the antenna 301 to send and receive information or signals, it does not affect the use of the communication module 302a The antenna 301 transmits and receives signals or information.

For example, when the antenna 301 is an independent antenna of the communication module 302a, and the communication module 302b itself does not have an independent antenna, and the antenna 301 needs to be borrowed, the front-end circuit 303b of the communication module 302b can be used as an antenna at the same time, similar to the function of an antenna. It is a front end that provides the communication module 302b with an antenna function. Correspondingly, the front-end circuit 303a of the communication module 302a is modified through a transceiver link to match the front-end circuit 303b of the communication module 302b. In this way, the communication modules 302a and 302b using the antenna 301 at the same time can receive and transmit signals or information at the same time, and meet the multi-channel communication requirements at the same time.

It should be noted that the above example uses two simultaneous working communication requirements as an example, but this application does not limit the number of communication requirements.

In addition, this application does not limit the characteristics of multiple communication requirements, which may be in the same frequency band or in different frequency bands; they may all be broadband, or they may be a mixture of various bandwidths.

The present application will be described in detail below through multiple embodiments.

Embodiment one

This embodiment describes the implementation of simultaneous use of low-frequency and low-power antennas.

As shown in Figure 4, the coupling module of this embodiment includes the following two parts of the circuit: one part is the front-end matching circuit of the communication module 402a (i.e. the original antenna module). On the basis of performance, it can match the coupling front-end circuit 403b of the communication module 402b (that is, borrow the antenna module) to realize the performance of the antenna module; the other part is the front-end circuit 403b of the communication module 402b, as a transceiver node, similar to the antenna function, the front-end The circuit is coupled with the front-end matching circuit of the original antenna module, and then the antenna 401 is used for sending and receiving.

In this embodiment, the above two parts of the circuit need to achieve coupling strength and isolation in specific hardware physical implementation and debugging. Among them, the coupling strength means that the efficiency of the final borrowed antenna module must meet the requirements; the isolation means that two communication modules must work simultaneously without interfering with each other.

FIG. 5 is a hardware physical implementation scheme of the circuit shown in FIG. 4 . As shown in Figure 4 and Figure 5, among them, borrowing the antenna module can use a Z-axis wound inductor as the front-end circuit, wherein the inductance of the Z-axis wound inductor, other inductors, capacitors, and resistors The parameters can be selected according to the debugging situation. The Z-axis winding inductor is designed at the end of the front-end circuit of the original antenna module (that is, the communication module 402a) to match the antenna, the center of the loop, that is, the position with strong field strength, and the Z-axis winding The inductor is coupled with the original loop to transmit and receive using the antenna module (ie, the communication module 402b). At the same time, the original antenna module can design an isolation matching circuit to prevent the two modules from interfering with each other.

In this embodiment, there is no physical connection relationship between the front-end circuit of the borrowed antenna module and the original antenna circuit, and the Z-axis winding inductor is set at a position with a strong field strength of the original loop, and the antenna 401 is used to carry out the process by means of an electromagnetic field. send and receive.

In this embodiment, the communication module 402a can be an FM module, and the communication module 402b can be an NFC module, or the communication module 402a can be an NFC module, and the communication module 402b can be an FM module; through the above design, it can be seen through actual debugging that the FM module and The NFC modules can work normally at the same time without affecting each other. Among them, as shown in FIG. 6 , the resonance of the antenna shared by the two communication requirements NFC and FM at the same time can meet the requirements.

Embodiment two

This embodiment illustrates the implementation of simultaneous use of antennas for low-frequency communication requirements and high-frequency communication requirements.

For an antenna, the ideal resonance corresponding to low frequency and high frequency can be shown in Figure 7.

As shown in Figure 8, the coupling module of this embodiment includes the following two parts of the circuit: a part is the front-end circuit 803a of the communication module 802a of the high-frequency communication requirement (that is, the antenna matching module of the high-frequency communication requirement), and this part of the circuit is redesigned , on the basis of satisfying its own performance, the front-end circuit 803b of the communication module 802b that can match the low-frequency communication requirements (ie, the coupling circuit module for low-frequency communication requirements), realizes the performance of borrowing the antenna module (ie, the communication module 802b); the other part is the low-frequency The front-end circuit 803b of the communication module 802b for communication needs, as a transceiver node for low-frequency communication needs, functions similarly to an antenna.

In this embodiment, the above-mentioned front-end circuits 803a and 803b can determine the parameters of each circuit element after actual debugging, so that low-frequency communication requirements and high-frequency communication requirements can share one antenna to work normally without affecting each other.

In addition, an embodiment of the present application further provides a wireless communication device, including the antenna circuit as described in the foregoing embodiments. For the description of the antenna circuit of this embodiment, reference may be made to the description of the foregoing embodiments, so details are not repeated here.

To sum up, in the embodiment of the present application, by setting a coupling module between the antenna and at least two communication modules, at least two communication modules share one antenna at the same time, and at least two communication modules do not interfere with each other when they share one antenna at the same time , so that a small number of antennas can be used in the same wireless communication device to achieve more antenna communication requirements, which meets the requirement for the same wireless communication device to achieve more antenna communication requirements. Moreover, the hardware solution of the present application is mature, reliable and low in cost.

The basic principles and main features of the present application and the advantages of the present application have been shown and described above. The present application is not limited by the above-mentioned embodiments, and what is described in the above-mentioned embodiments and description is only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, the present application will also have various changes and improvements. These changes All modifications and improvements are within the scope of the claimed application.

Claims (14)

1. A kind of 1. antenna circuit, it is characterised in that including：Antenna, coupling module and at least two communication modules；The coupling Module is electrically connected with least two communication module, and can realize that signal transmits with the antenna so that described at least two Individual communication module can share the antenna simultaneously, and at least two communication module when sharing the antenna at the same time mutually not Interference.
2. 2. antenna circuit according to claim 1, it is characterised in that the coupling module includes：At least two phase mutual coupling The communication module front-end circuit of conjunction, a communication module front-end circuit are electrically connected with a communication module, and can be with the day Line realizes that signal transmits.
3. 3. antenna circuit according to claim 2, it is characterised in that between at least two communication modules front-end circuit By spatial coupling realize couple, or, coupling is realized by electrical couplings mode, or, by electrically it is direct-connected add every Coupling is realized from mode.
4. 4. antenna circuit according to claim 2, it is characterised in that the coupling module includes first communication module front end Circuit and second communication module front-end circuit；At least two communication module includes first communication module and the second communication mould Block；The first communication module is electrically connected with the first communication module front-end circuit, and the second communication module is electrically connected with The second communication module front-end circuit；The first communication module passes through described in first communication module front-end circuit utilization Antenna carries out signal transmission；The second communication module is carried out by the second communication module front-end circuit using the antenna Signal transmits.
5. 5. antenna circuit according to claim 4, it is characterised in that the first communication module front-end circuit includes inductance Device, the first communication module front-end circuit realize coupling with the second communication module front-end circuit by spatial coupling Close.
6. 6. antenna circuit according to claim 5, it is characterised in that the second communication module front-end circuit and the day Line forms loop, and the inductor is arranged on the end of the second communication module front-end circuit, at the center of the loop Position, to realize that the first communication module front-end circuit carries out signal transmission with the antenna.
7. 7. antenna circuit according to claim 1, it is characterised in that at least two communication module includes：Frequency is adjusted FM modules and near-field communication NFC module processed, at least two communication module share the antenna reality by the coupling module The communication requirement of existing low frequency/small Power.
8. 8. a kind of coupling module for antenna conversion, it is characterised in that for being electrically connected with least two communication modules, and energy Enough and antenna realizes that signal transmits, and the coupling module includes：At least two communication module front-end circuits to intercouple, one Communication module front-end circuit be electrically connected with a communication module, and can be realized with the antenna signal transmit so that it is described extremely Few two communication modules can share the antenna simultaneously, and mutual when at least two communication module while the shared antenna Do not disturb.
9. 9. coupling module according to claim 8, it is characterised in that between at least two communication modules front-end circuit By spatial coupling realize couple, or, coupling is realized by electrical couplings mode, or, by electrically it is direct-connected add every Coupling is realized from mode.
10. 10. coupling module according to claim 8, it is characterised in that before the coupling module includes first communication module Terminal circuit and second communication module front-end circuit；At least two communication module includes first communication module and the second communication Module；The first communication module is electrically connected with the first communication module front-end circuit, and the second communication module electrically connects Connect the second communication module front-end circuit；The first communication module utilizes institute by the first communication module front-end circuit State antenna and carry out signal transmission；The second communication module is entered by the second communication module front-end circuit using the antenna Row signal transmits.
11. 11. coupling module according to claim 10, it is characterised in that the first communication module front-end circuit includes electricity Sensor, the first communication module front-end circuit realize coupling with the second communication module front-end circuit by spatial coupling Close.
12. 12. coupling module according to claim 11, it is characterised in that the second communication module front-end circuit with it is described Dwi hastasana is into loop, and the inductor is arranged on the end of the second communication module front-end circuit, in the loop Heart position, to realize that the first communication module front-end circuit carries out signal transmission with the antenna.
13. 13. coupling module according to claim 10, it is characterised in that the first communication module is frequency modulation(PFM) FM moulds Block, the second communication module are near-field communication NFC module, and the first communication module and the second communication module pass through institute State coupling module and share the communication requirement that the antenna realizes low frequency/small Power.
14. 14. a kind of Wireless Telecom Equipment, it is characterised in that including the antenna circuit as any one of claim 1 to 7.