WO2020133522A1 - Transmission line module, antenna module and mobile terminal - Google Patents

Abstract

The present invention provides a transmission line module, an antenna module and a mobile terminal. The transmission line module is applied to the antenna module, the antenna module comprising a radio frequency front-end and a radiator. The transmission line module comprises a body, a transmission line integrated on the body and used for transmitting a signal, and a circuit connected to the transmission line; the body comprises a first end portion and a second end portion, the first end portion being electrically connected to the radio frequency front-end, and the second end portion being electrically connected to the radiator, the circuit being provided at the second end portion and being electrically connected to the first end portion and the second end portion by means of the transmission line. According to the transmission line module, the antenna module and the mobile terminal of the present invention, the antenna module does not need to be provided on the main board of the mobile terminal, saving the space of the main board.

Description

Transmission line module, antenna module and mobile terminal 【Technical field】

The invention relates to the technical field of antennas, in particular to a transmission line module, an antenna module and a mobile terminal.

【Background technique】

With the development of technology, mobile mobile terminals have become an indispensable part of life. At the same time, in order to meet the requirements for the network speed of mobile mobile terminals, the network has also developed from 3G network to 4G network, or even about 5G network, which greatly improves the speed of Internet access. But at the same time, faster network speeds require higher antenna performance for mobile terminals. Most of the existing antennas are installed on the main board of the mobile terminal, which is limited by the components on the main board, the position where the antenna can be installed is greatly reduced, and the performance of the antenna is limited.

Therefore, it is necessary to provide a new technical solution to solve the above defects.

[Invention content]

The purpose of the present invention is to provide a transmission line module, an antenna module and a mobile terminal to solve the problem that the antenna occupies the space of the main board.

A transmission line module is applied to an antenna module. The antenna module includes a radio frequency front end and a radiator. The transmission line module includes a body and a transmission line integrated with the body for transmitting signals and connected to the transmission line A circuit, the body includes a first end and a second end; the first end is used to electrically connect a radio frequency front end, the second end is used to electrically connect the radiator, and the circuit is provided The second end is electrically connected to the first end and the second end through the transmission line.

Preferably, the body is a flexible body, and the body is a flexible body, and the flexible body is made of LCP or MPI material.

Preferably, there are multiple second ends, and each second end is provided with a circuit.

The invention also provides an antenna module. The antenna module includes a metal frame and a transmission line module. The metal frame is formed with a radiator. The transmission line module includes a body and an integrated body for transmitting signals. The transmission line and the circuit connected to the transmission line, the body includes a first end and a second end; the first end is used to electrically connect the RF front end of the RF transceiver device, the second end is used To electrically connect the radiator, the circuit is disposed at the second end and electrically connected to the first end and the second end through the transmission line. Preferably, the metal frame includes a non-conductive isolation portion and a ground portion spaced apart from the isolation portion, and the radiator is formed between the isolation portion and the ground portion.

Preferably, the metal frame is provided with an opening in the partition, and the opening is filled with an insulating material to form the partition.

Preferably, the number of the radiators is plural, the number of the second end antennas is the same as the number of the radiators, and each second end is provided with a circuit.

Preferably, the antenna module includes two adjacent radiators, and the isolation portion corresponding to one of the radiators is away from the other radiator.

Preferably, the body is a flexible body, and the flexible body is made of LCP or MPI material.

The invention also provides a mobile terminal. The mobile terminal includes a radio frequency front end, and the mobile terminal further includes any of the antenna modules described above.

The beneficial effect of the present invention is that the transmission line module of the antenna module provided by the present invention integrates a plurality of transmission lines and a plurality of circuits, and the radiator of the antenna module is arranged in the metal frame, and there is no need to install the antenna module on the mobile terminal. The main board saves the main board space, and has the advantages of low loss, good transmission performance, and high radiation efficiency.

[Description of the drawings]

1 is a schematic structural diagram of a mobile terminal provided by the present invention;

2 is a schematic diagram of an antenna module of a mobile terminal provided by the present invention;

Figure 3 is a partial enlarged view of part A in Figure 2;

4 is a partial enlarged view of part B in FIG. 2;

FIG. 5 is an S-parameter curve diagram of the reflection coefficient of the input end of the transmission line module according to an embodiment of the present invention;

6 is a graph showing the S-parameter curve of the transmission coefficient of the transmission line of the transmission line module provided by the embodiment of the present invention;

7 is a graph of S-parameter curves of a first radiator and a second radiator provided by an embodiment of the present invention;

FIG. 8 is an efficiency curve diagram of a first radiator and a second radiator provided by an embodiment of the present invention;

9 is a graph of S-parameter curves of a third radiator and a fourth radiator provided by an embodiment of the present invention;

FIG. 10 is an efficiency curve diagram of a third radiator and a fourth radiator provided by an embodiment of the present invention.

【detailed description】

The present invention will be further described below with reference to the drawings and embodiments.

Referring to FIGS. 1 and 2, the mobile terminal 100 includes a housing 400, an RF front end 300 housed in the housing 400, and an antenna module 200 electrically connected to the RF front end 300. The antenna module 200 includes a transmission line module 1, a circuit 12 provided on the transmission line module 1, and a metal frame 2. The radiator 21 is formed on the metal frame 2. The transmission line module 1 is electrically connected between the radio frequency front end 300 and the radiator 21 for processing signals and transmitting signals. The RF front-end 300 is mainly used to process RF signals, including power amplifiers, antenna switches, filters, duplexers, or low-noise amplifiers. In this embodiment, since the transmission line module 1 is provided with the circuit 12, only the first end 111 and the second end 112 need to be connected to the RF front end 300 and the radiator 21 to form an electrical conduction to receive and send RF signals. There is no need to separately design the transmission line module circuit and the circuit, so that the design and assembly of the antenna module 200 or the mobile terminal 100 to which the transmission line module 1 is applied is simpler.

Referring to FIG. 2 in combination, the transmission line module 1 includes a body 11 and a transmission line 120 and a circuit 12 integrated in the body 11. The flexible body 11 forms a first end 111 and a second end 112. The circuit 12 is disposed on the second end 112. The first end 111 is used for electrical connection with the RF front end 300, and the second end 112 is joined to the radiator 21, so that the circuit 12 is electrically connected between the RF front end 300 and the radiator 21 through the flexible body 11. The body 11 is a flexible body. Preferably, the body 11 is made of LCP or MPI material. Since the transmission line module 1 uses LCP or MPI materials, the shape can be adjusted.

In this embodiment, there are one first end 111, four radiators 21, correspondingly four second ends 112, and four circuits 12.

Please refer to FIG. 2 and FIG. 4. Correspondingly, the transmission line 120 includes a first transmission line 121, a second transmission line 122, a third transmission line 123 and a fourth transmission line 123. The first transmission line 121, the second transmission line 122, the third transmission line 123, and the fourth transmission line 124 respectively form corresponding input terminals a1, a2, a3, a4 at the first end 111, and form output terminals at the corresponding second end 112 . The first transmission line 121, the second transmission line 122, the third transmission line 123, and the fourth transmission line 124 are respectively electrically connected to the circuits 12 provided at the four second ends 112 one by one, so that the circuits 12 are correspondingly connected to the four Each radiator 21 forms 4 independent lines.

In other feasible embodiments, the first end 111 may also be multiple, and the number of the second end 112 may be arbitrarily set according to actual needs. In the present embodiment, the second end 112 is engaged with the radiator 21. In other feasible embodiments, the transmission line module 1 and the radiator 21 may not need to be directly joined, and may be electrically connected to the radiator 21 through a conductive sheet or other means.

In this embodiment, the transmission line module 1 forms the transmission line 120 between the RF front end 300 and the radiator 21 in the body 11 to avoid interference with other lines and to make the internal lines of the mobile terminal 100 more concise. In addition, the transmission line module 1 can be adjusted. Applying the transmission line module 1 to the mobile terminal 100 or the antenna module 200 can make the layout of the radiator more flexible.

Please refer to FIG. 2 and FIG. 3 together. The metal frame 2 is a rectangular frame. The metal frame 2 is provided with a non-conductive partition 211 and a ground 212 spaced apart from the partition 211. The metal frame 2 forms the radiator 21 at a position between the isolation portion 211 and the ground portion 212. The isolation portion 211 is used to intercept the metal frame 2 to prevent the metal frame 21 from shielding the signal from electromagnetic signals. The isolation portion 211 is obtained by conducting conductive treatment at a corresponding position of the metal frame 2. In some feasible embodiments, an opening is opened at a corresponding position of the metal frame 2, and an insulating material is filled in the opening to form the isolation portion 211. The insulating material is plastic, rubber and other insulating materials.

The operating frequency band of the antenna module 100 is affected by the size of the radiator 21, that is, the interval between the isolation portion 211 and the ground portion 212 may affect the operating frequency band. Therefore, when designing the antenna module 200, the interval between the isolation portion 211 and the ground portion 212 can be determined according to the requirements of the operating frequency band of the antenna module 200. In this embodiment, the antenna module covers 3.4-3.6 GHz and 4.8-5.0 GHz operating frequency bands.

In this embodiment, the radiator 21 includes a first radiator 213, a second radiator 214, a third radiator 215, and a third radiator 216, and each radiator 21 has a second port 112 correspondingly connected thereto. The four radiators 21 are distributed on the first frame 221 and the second frame 222 opposite to the metal frame 2. The first frame 221 includes a first radiator 213 and a second radiator 214, and the second frame 222 includes a third radiator 215 and a fourth radiator 216. Every two radiators 21 arranged on the same frame are arranged adjacently, and the isolation portion 211 corresponding to one radiator 21 is away from the other radiator 21. Understandably, when the number of radiators 21 changes, the number of second ports 112 also changes accordingly, and the position of the radiator 21 may also change. It can be understood that, in this embodiment, the antenna module 200 constitutes a 4×4 MIMO antenna, which improves the signal transmission and reception rate. In other embodiments, the metal frame 2 can also be set to eight radiators 21 according to actual needs, and the transmission line module 1 is provided with eight second ports 112 to form an 8×8 MIMO antenna.

Referring again to FIG. 1, the mobile terminal 100 is provided with a clearance area 312 at a position opposite to the radiator 21, and no components such as metal components, batteries, oscillators, and shields are provided in the clearance area 312 to further reduce the antenna The signal sent and received by the module 200 receives interference. In this embodiment, the clearance area 312 is a long and narrow slit, and its length is the same as the length of the radiator 21. The length of the radiator 21 is the distance between the isolation portion 211 and the ground portion 212 corresponding to the isolation portion.

FIG. 5 is an S-parameter curve diagram of the reflection coefficient of the input end of the transmission line module 1 according to an embodiment of the present invention, reflecting the reflection coefficients of each transmission line of the transmission line 120 from the input end. Where: S1 corresponds to the reflection coefficient of the input terminal a1 of the first transmission line 121; S2 corresponds to the reflection coefficient of the input terminal a2 of the second transmission line 122; S3 corresponds to the reflection coefficient of the input terminal a3 of the third transmission line 123; and S4 corresponds to the fourth transmission line The reflection coefficient of the input terminal a4 of 124.

FIG. 6 is an S-parameter curve diagram of the transmission coefficient of the transmission line 120 of the transmission line module according to an embodiment of the present invention, which reflects the transmission coefficient of each transmission line of the transmission line 120 from the input end to the output end. Among them: S11 corresponds to the transmission coefficient of the first transmission line 121 from the input terminal a1 to the output terminal; S12 corresponds to the transmission coefficient of the second transmission line 122 from the input terminal a2 to the output terminal; S13 corresponds to the transmission coefficient of the third transmission line 123 from the input terminal a3 to the output terminal; S14 corresponds to the transmission coefficient of the fourth transmission line 124 from the input terminal a4 to the output terminal.

The performance of the transmission line module 1 provided by the embodiment of the present invention is shown in FIGS. 5-6. The transmission line module has a low insertion loss in the range of 3.3-5 GHz and can provide good transmission performance.

7 is a graph of S-parameter curves of the first radiator 213 and the second radiator 214 provided by an embodiment of the present invention, reflecting the reflection coefficients of the first radiator 213 and the second radiator 214, and the first radiator 213 and The isolation between the second radiators 214. Where: S3 corresponds to the reflection coefficient of the first radiator 213; S4 corresponds to the reflection coefficient of the second radiator 214; S34 corresponds to the isolation between the first radiator 213 and the second radiator 214. It can be seen that the antenna module 200 provided by the embodiment of the present invention has better isolation.

FIG. 8 is an efficiency curve diagram of the first radiator 213 and the second radiator 214 provided by the embodiment of the present invention, reflecting the radiation efficiency of the first radiator 213 and the second radiator 214. S31 and S41 correspond to the radiation efficiency of the first radiator 213 and the second radiator 214, respectively. It can be seen that the antenna module 200 provided by the embodiment of the present invention has better radiation efficiency.

9 is an S-parameter curve diagram of the third radiator 215 and the fourth radiator 216 provided by the embodiment of the present invention, reflecting the reflection coefficients of the third radiator 215 and the fourth radiator 216, and the third radiator 215 and The isolation between the fourth radiators 216. Where: S5 corresponds to the reflection coefficient of the third radiator 215; S6 corresponds to the reflection coefficient of the fourth radiator 216; S56 corresponds to the isolation between the third radiator 215 and the fourth radiator 216. It can be seen that the antenna module 200 provided by the embodiment of the present invention has better isolation.

FIG. 10 is an efficiency curve diagram of the third radiator 215 and the fourth radiator 216 provided by the embodiment of the present invention, and reflects the radiation efficiency of the third radiator 215 and the fourth radiator 216. Among them, S51 and S61 correspond to the radiation efficiency of the third radiator 215 and the fourth radiator 216, respectively. It can be seen that the antenna module 200 provided by the embodiment of the present invention has better radiation efficiency.

The present invention provides a transmission line module 1, an antenna module 200, and a mobile terminal 100. The transmission line module 1 integrates multiple transmission lines 120 and multiple circuits 12, and the radiator 21 is disposed on the metal frame 2. Therefore, the antenna module There is no need to install it on the motherboard, saving the internal space of the motherboard, and more components can be added to increase the functions of the mobile terminal. In addition, the radiator 21 of the antenna module 200 can be directly electrically connected to the RF front end 300 through the transmission line module 1, which is more convenient in the design process of the antenna module 200. In addition, the antenna module 200 is provided with a radiator 21 on the metal frame 2. Since the transmission line module 1 is flexible, the shape can be adjusted so that the position of the radiator 21 on the metal frame 2 is more flexible, which makes the antenna module 200 more flexible. Design is easier.

The above are only the embodiments of the present invention. It should be pointed out that those of ordinary skill in the art can make improvements without departing from the inventive concept of the present invention, but these belong to the present invention. Scope of protection.

Claims (10)

1. A transmission line module is applied to an antenna module. The antenna module includes a radio frequency front end and a radiator. The transmission line module includes a body and a transmission line integrated with the body for transmitting signals and For the circuit connected by the transmission line, the body includes a first end and a second end; the first end is used to electrically connect a radio frequency front end, and the second end is used to electrically connect the radiator The circuit is disposed at the second end and electrically connected to the first end and the second end through the transmission line.
2. The transmission line module according to claim 1, wherein the body is a flexible body, and the flexible body is made of LCP or MPI material.
3. The transmission line module according to claim 1, wherein there are a plurality of second ends, and each second end is provided with a circuit.
4. An antenna module, characterized in that the antenna module includes a metal frame and a transmission line module, the metal frame is formed with a radiator; the transmission line module includes a body and an integrated body for transmitting signals Transmission line and a circuit connected to the transmission line, the body includes a first end and a second end; the first end is used to electrically connect a radio frequency front end, and the second end is used to electrically connect In the radiator, the circuit is provided at the second end and electrically connected to the first end and the second end through the transmission line.
5. The antenna module according to claim 4, wherein the metal frame includes a non-conductive isolation portion and a ground portion spaced apart from the isolation portion, and the isolation portion is formed between the isolation portion and the ground portion述 Radiator.
6. The antenna module according to claim 5, wherein the metal frame is provided with an opening in the isolation portion, and the opening is filled with an insulating material to form the isolation portion.
7. The antenna module according to claim 6, wherein the number of the radiators is plural, the number of the second end antennas is the same as the number of the radiators, and each second end is separately Set up a circuit.
8. The antenna module according to claim 7, wherein the antenna module includes two adjacent radiators, and the isolation portion corresponding to one of the radiators is away from the other Radiator.
9. The antenna module according to claim 8, wherein the body is a flexible body, and the flexible body is made of LCP or MPI material.
10. A mobile terminal, the mobile terminal includes a radio frequency front end, characterized in that it includes the antenna module according to any one of claims 4-9.

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