WO2013189325A1

WO2013189325A1 - Built-in antenna, mobile terminal of built-in antenna and communication method therefor

Info

Publication number: WO2013189325A1
Application number: PCT/CN2013/081107
Authority: WO
Inventors: 陈春雷
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-11-22
Filing date: 2013-08-08
Publication date: 2013-12-27
Also published as: CN103022637A; CN103022637B

Abstract

Disclosed is a built-in antenna, comprising: a high-frequency antenna running cable, a low-frequency antenna running cable, a feeding point, a grounding point, a feeding foot, a grounding foot, a feeding conduction band, and a grounding conduction band; wherein the high-frequency antenna running cable is connected to the low-frequency antenna running cable via the feeding point; the feeding point is connected to the feeding foot via the feeding conduction band, and the feeding foot is connected to a radio-frequency circuit of a mobile terminal; and the grounding point is connected to the grounding foot via the grounding conduction band, and the grounding foot is connected to a grounding terminal of the mobile terminal. Also disclosed at the same time is a mobile terminal of a built-in antenna and a communication method therefor. The present invention can be applied to take full advantage of the inner space of a mobile terminal to arrange an antenna while achieving a GPS function, a WLAN function and a mobile terminal communication function, thereby saving the space required by a built-in antenna.

Description

Mobile terminal with built-in antenna and built-in antenna and communication method thereof

The present invention relates to antenna technology in a mobile terminal, and in particular to a built-in antenna, a mobile terminal with built-in antenna, and a communication method thereof. Background technique

With the rapid development of mobile communication technologies and the widespread application of mobile communication systems, as a terminal product of mobile communication systems, mobile terminals are moving toward miniaturization, multi-modeling, and high performance.

For mobile terminal manufacturers, the RF (RF) part, the baseband part, and the Digital Signal Processor (DSP) part have achieved a high degree of integration so far. The miniaturization and cost reduction of mobile terminal devices. Only the antenna part, especially the antenna part of the mobile terminal, is slow in technology due to its performance and structural size affected by the structure of the mobile terminal, the size of the mobile device, the mounting position of the electronic components, and the performance of the material of the mobile terminal casing. At present, the integration of mobile terminal antennas is still low, and the price is also high, which restricts the further development of mobile terminal technology.

At present, mobile terminals generally use built-in antennas, mainly including Planar Inverted F Antenna (PIFA) and single-stage antenna. These built-in antennas are designed and manufactured in a two-dimensional plane, which results in an antenna that is too large for a small-sized mobile terminal that is very tight in size.

In addition, with the popularity of smart mobile terminals, mobile terminals need more antennas to receive Global Positioning System (GPS) signals, Wireless Local Area Networks (WLAN) signals, and multi-band multi-band Mobile terminal signals, so that current PIFA antennas and single-stage antennas are even less able to meet the needs of space design. begging. Summary of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a built-in antenna, which can save space required by the antenna, thereby reducing the size of the mobile terminal.

Another object of the embodiments of the present invention is to provide a mobile terminal with an antenna and a communication method thereof, which can implement multiple functions of GPS positioning, WLAN, and mobile terminal communication by using multiple built-in antennas.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

The embodiment of the present invention provides a built-in antenna, including: a high frequency antenna trace, a low frequency antenna trace, a feed point, a ground point, a feed pin, a ground pin, a feed conduction band, and a ground conduction band; among them,

The high frequency antenna trace and the low frequency antenna trace are connected by a feed point;

The feed point is connected to the feed pin through a feed conduction band, and the feed pin is connected to the RF circuit of the mobile terminal;

The grounding point is connected to the grounding pin through a grounding strap, and the grounding leg is connected to the grounding end of the mobile terminal.

In the above solution, the high frequency antenna trace has a linear cylindrical shape, one end is connected to the feed point, and the other end is clear;

The low frequency antenna trace has a linear cylindrical shape or a right-angled cylindrical shape, one end is connected to the feeding point, and the other end is clear;

Correspondingly, the high-frequency antenna trace and the low-frequency antenna trace are linear in a straight line, or the high-frequency antenna trace and the low-frequency antenna trace are generally at right angles.

An embodiment of the present invention provides a mobile terminal with an internal antenna, where the mobile terminal includes: one or more internal antennas, one or more radio frequency modules on a printed circuit board (PCB), and one ground terminal; The one or more built-in antennas are respectively located at a clearance of the PCB, and respectively maintain a certain distance from an edge of the adjacent PCB edge; the feed pins of the one or more built-in antennas are respectively connected to the input ends of the corresponding one or more RF modules; The grounding legs of more than one built-in antenna are connected to the grounding end;

The one or more radio frequency modules are configured to respectively receive radio frequency signals sent by the one or more internal antennas, and perform corresponding radio frequency processing on the radio frequency signals;

The ground terminal is located on the PCB and is configured to provide a PCB grounding point to the one or more internal antennas.

In the above solution, the internal antenna includes: a high frequency antenna trace, a low frequency antenna trace, a feed point, a ground point, a feed pin, a ground pin, a feed conduction band, and a ground conduction band;

In the above solution, the one or more built-in antennas include: a first antenna, a second antenna, and a third antenna; the one or more radio frequency modules include a first radio frequency module, a second radio frequency module, and a first radio frequency module;

The first antenna is configured to receive a GPS signal and transmit the GPS signal to the The first radio frequency module performs processing;

The second antenna is configured to receive a WLAN signal, and send the WLAN signal to the second radio frequency module for processing;

The third antenna is configured to receive a mobile terminal signal and send the mobile terminal signal to the third radio frequency module for processing.

In the above solution, the mobile terminal signal includes: a Global System of Mobile communication (GSM) signal, and a Wideband Code Division Multiple Access (WCDMA) signal.

The embodiment of the invention provides a communication method for a mobile terminal with an internal antenna, and more than one built-in antenna is disposed at a clearance of the mobile terminal PCB; the method further includes:

The one or more built-in antennas of the mobile terminal receive one or more electromagnetic wave signals, and one or more radio frequency modules of the mobile terminal respectively perform radio frequency processing on the received one or more electromagnetic wave signals.

In the above solution, the one or more built-in antennas are linear antennas or right-angle antennas, and respectively maintain a certain distance from the edge of the adjacent PCB edge; the feeding pins of the one or more built-in antennas respectively correspond to the corresponding one or more RF modules. The input end is connected; the grounding pins of the one or more built-in antennas are all connected to the ground end in the mobile terminal.

In the above solution, the electromagnetic wave signal includes: a GPS signal, a WLAN signal, and a mobile terminal signal;

The mobile terminal signal includes a GSM signal and a WCDMA signal.

The built-in antenna, the mobile terminal with the built-in antenna and the communication method thereof are provided in the embodiment of the present invention, and a metal rod antenna is disposed at a clearance around the PCB inside the mobile terminal, and the metal rod antenna may have a straight type and a right angle type, respectively, and the adjacent adjacent PCB The edge of the antenna is kept at a certain distance, and the metal rod antenna is connected to the radio frequency module of the PCB through the feed pin. Compared with the built-in antenna in the prior art, the built-in antenna in the embodiment of the invention greatly reduces the space occupied by the antenna; According to the actual situation For the purpose of use, a plurality of antennas can be flexibly arranged in the clearance around the PCB of the mobile terminal, and these antennas can be used to implement various functions such as a GPS positioning function, a WLAN function, and a mobile terminal communication function. DRAWINGS

1 is a schematic diagram of a linear antenna according to an embodiment of the present invention;

2 is a schematic diagram of a right angle antenna according to an embodiment of the present invention;

3 is a schematic diagram of a mobile terminal with an internal antenna according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a method for implementing communication by a mobile terminal with an antenna according to an embodiment of the present invention. detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in order Further, the detailed description of the embodiments of the present invention will be omitted if the detailed description of the known functions and structures will obscure the embodiments of the present invention. It is an object of the present invention to provide a more complete technical content to those of ordinary skill in the art. Therefore, in order to highlight the effects, the shape, size, and the like of the elements in the drawings may be exaggerated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a built-in antenna and a mobile terminal using the built-in antenna of the embodiment of the present invention and a communication method thereof will be described with reference to the accompanying drawings.

1 is a schematic diagram of a linear antenna according to an embodiment of the present invention. As shown in FIG. 1, the linear antenna includes: a high frequency antenna trace 11, a low frequency antenna trace 12, a high frequency antenna trace 11 and a low frequency antenna trace. 12 feeding point 13, grounding point 14, feeding leg 15, grounding leg 16, feeding conduction band 17 connecting feeding point 13 and feeding leg 15, grounding conduction band 18 connecting grounding point 14 and grounding leg 16; among them,

The high frequency antenna trace 11 has a linear cylindrical shape, one end is connected to the feeding point 13 and the other end is clear; Here, the length of the high frequency antenna trace 11 is L1, which is the length from the feed point 13 to the head end. The headroom means that no device or point is connected; since the length L1 satisfies the condition of the resonator, it should be four. One wavelength of the waveguide, for which L1 should satisfy:

Where λΐ is the wavelength of the operating frequency of the high-frequency antenna trace 11 and ε is the effective dielectric constant of the medium of the high-frequency antenna trace 11; here, the medium of the high-frequency antenna trace 11 may be copper, iron, or the like; The low frequency antenna trace 12 has the same shape and working principle as the high frequency antenna trace 11, and the low frequency antenna trace 12 and the high frequency antenna trace 11 have a linear cylindrical shape as a whole; the difference is: the low frequency antenna is taken Line 12 has a length of L2 and, according to resonator conditions, low frequency antenna routing

12 The wavelength of the working frequency λ2 is different from the wavelength of the operating frequency of the high-frequency antenna trace 11 λ ΐ ; Preferably, λ ΐ is the high-frequency wavelength, that is, the short-wave; λ 2 is the low-frequency wavelength, that is, the long-wave;

Here, the lengths of L1 and L2 can be adjusted according to the frequency and bandwidth of the designed antenna; the feeding point 13 is located at the connection portion of the high frequency antenna trace 11 and the low frequency antenna trace 12, and is fed through the feed conduction belt 17 The foot 15 is connected; wherein the feed conduction belt 17 is a through feed point

13 and a feed metallization hole of the feed pin 15;

The grounding point 14 is located near the feeding point 13 and is connected to the grounding leg 16 through the grounding guiding strip 18; wherein the grounding guiding strip 18 is a grounding metallized hole penetrating the grounding point 14 and the grounding leg 16; The electric pin 15 is connected to the radio frequency circuit of the mobile terminal and configured to transmit the receiving signal and the transmitting signal;

The grounding pin 16 is connected to the grounding end of the mobile terminal.

Preferably, the grounding leg 16 can be omitted according to the design requirements; correspondingly, the grounding point 14, the grounding conductor 18 can also be omitted.

2 is a schematic diagram of a right angle antenna according to an embodiment of the present invention. As shown in FIG. 2, the right angle antenna includes: a high frequency antenna trace 21, a low frequency antenna trace 22, a high frequency antenna trace 21, and a low frequency antenna trace. 22 feed point 23, ground point 24, feed pin 25, ground pin 26, connection feed Feeding strip 27 of point 23 and feed leg 25, grounding strap 28 connecting grounding point 24 and grounding leg 26;

The high frequency antenna trace 21 has a linear cylindrical shape, one end is connected to the feeding point 23, and the other end is clear;

Here, the length of the high frequency antenna trace 21 is L3, which is the length from the feed point 23 to the head end. The headroom means that no device or point is connected; since the length L3 satisfies the condition of the resonator, it should be four. One wavelength of the waveguide, for which L3 should satisfy:

Wherein, λ3 is the wavelength of the operating frequency of the high frequency antenna trace 21, and ε is the effective dielectric constant of the medium of the high frequency antenna trace 21; here, the medium of the high frequency antenna trace 21 may be copper, iron, or the like; The low frequency antenna trace 22 has the same working principle as the high frequency antenna trace 21, and the low frequency antenna trace 22 and the high frequency antenna trace 21 as a whole have a right angle cylindrical shape; the difference is: the low frequency antenna trace 22 It has a right-angled cylindrical shape, one end is connected to the feeding point, and the other end is clear, and the total length of both sides of the right angle is L4; and according to the resonator condition, the wavelength λ4 of the operating frequency of the low-frequency antenna trace 22 is different from the operating frequency of the high-frequency antenna trace 21 Wavelength λ3; Preferably, λ3 is a high frequency wavelength, that is, a short wave, and λ4 is a low frequency wavelength, that is, a long wave;

Here, the lengths of L3 and L4 can be adjusted according to the frequency and bandwidth of the designed antenna; the feeding point 23 is located at the connection portion of the high frequency antenna trace 21 and the low frequency antenna trace 22, through the feed conduction belt 27 and the feed The foot 25 is connected; wherein the feed conduction belt 27 is a through feed point

23 and a feed metallization hole of the feed pin 25;

The grounding point 24 is located near the feeding point 23 and is connected to the grounding leg 26 through the grounding strap 28; wherein the grounding strap 28 is a grounding metallized hole penetrating the grounding point 24 and the grounding leg 26; The electric foot 25 is connected to the radio frequency circuit of the mobile terminal and configured to transmit the receiving signal and the transmitting signal;

The grounding leg 26 is connected to the grounding end of the mobile terminal. Preferably, the grounding leg 26 can be omitted according to the design requirements; correspondingly, the grounding point 24 and the grounding wire 28 can also be omitted. FIG. 3 is a schematic diagram of a mobile terminal with an antenna according to an embodiment of the present invention. As shown in FIG. 3, the mobile terminal includes: one or more internal antennas, one or more RF modules 34 on the PCB, and one ground terminal 35;

The one or more built-in antennas are linear antennas or right-angle antennas, which are respectively located at the clearance of the PCB, and respectively maintain a certain distance from the edge of the adjacent PCB edge; here, the clearance refers to any of the upper edge regions of the PCB. The area of the electrical component; the certain distance may be a large separation of 4 to 10 mm;

The feed pins of the one or more built-in antennas are respectively connected to the input ends of the corresponding one or more RF modules 34; the ground pins of the one or more built-in antennas are all connected to the ground terminal 35.

The one or more radio frequency modules 34 are integrated on the PCB, and configured to respectively receive the radio frequency signals sent by the one or more internal antennas, and perform corresponding radio frequency processing on the radio frequency signals;

The grounding terminal 35 is located on the PCB and is configured to provide a PCB grounding point to the one or more internal antennas.

The built-in antenna and its corresponding radio frequency module can be respectively configured to implement a GPS positioning function, a WLAN function, and a mobile terminal communication function.

In this embodiment, the mobile terminal includes three built-in antennas: a first antenna 31, a second antenna 32, and a third antenna 33;

The mobile terminal further includes three radio frequency modules 34: a first radio frequency module RF1, a second radio frequency module RF2, and a third radio frequency module RF3. The RF1 is configured to receive the GPS signal sent by the first antenna 31, and the RF2 is configured to receive the second antenna 32. The WLAN signal, the RF3 is configured to receive the mobile terminal signal sent by the third antenna 33;

Specifically, the first antenna 31 is a linear antenna located at a clearance below the PCB and at a distance S1 from the lower edge of the PCB; wherein the length of the S1 is 4-10 mm, which may be according to the frequency and bandwidth of the designed antenna. Adjustment; Here, the first antenna 31 is configured to implement a GPS positioning function, and send the received GPS signal to the radio frequency module RF1 for radio frequency processing;

The second antenna 32 is a right angle antenna located at a clear space on the upper left side of the PCB, and the horizontal end and the vertical end of the antenna are respectively kept at a certain distance S2 from the horizontal edge above the PCB and the vertical edge on the left side; wherein, S2 The length of the antenna is 4-10 mm, which can be adjusted according to the frequency and bandwidth of the designed antenna. Here, the second antenna 32 is configured to implement a WLAN function, and sends the received WLAN signal to the radio frequency module RF2 for radio frequency processing;

The third antenna 33 is a right angle antenna located at a clear space on the upper right side of the PCB circuit board, and the horizontal end and the vertical end of the antenna are respectively kept at a certain distance from the horizontal edge and the vertical edge of the PCB circuit board S3; wherein, S3 The length is 4-10mm, which can be adjusted according to the frequency and bandwidth of the designed antenna;

Here, the third antenna 33 is configured to implement a mobile communication function, and send the received mobile terminal signal to the radio frequency module RF3 for radio frequency processing;

Here, the mobile terminal signal includes: a GSM frequency band signal, a WCDMA frequency band signal, and the like. Here, the positions of the first antenna 31, the second antenna 32, and the third antenna 33 may not be unique, and may be reversed according to layout requirements; that is, the positions of the first antenna 31, the second antenna 32, and the third antenna 33 It can be interchanged. As long as the length of the original antenna trace is constant, it can be arranged in a limited space around the PCB. For details, refer to the actual layout requirements.

Here, only three antennas are taken as an example. In practical applications, if there are fewer or more antennas, the layout can be performed in a similar manner as described above.

Here, when the antenna has no grounding pin according to design requirements, the one grounding terminal 35 may not provide a PCB grounding point to the internal antenna.

4 is a schematic flowchart of a communication method for implementing a mobile terminal with an antenna according to an embodiment of the present invention. As shown in FIG. 4, the method includes:

Step 401: Set more than one built-in antenna at the clearance of the mobile terminal PCB. The one or more built-in antennas are linear antennas or right-angle antennas, and respectively maintain a certain distance from an edge of an adjacent PCB edge, and the certain distance may be a distance of 4 to 10 mm; the feeding legs of the one or more built-in antennas And respectively connected to the input ends of the corresponding one or more radio frequency modules; the grounding pins of the one or more internal antennas are all connected to the ground end in the mobile terminal.

Step 402: The one or more internal antennas of the mobile terminal receive one or more electromagnetic wave signals, and one or more radio frequency modules of the mobile terminal respectively perform radio frequency processing on the received one or more electromagnetic wave signals.

Here, the mobile terminal is configured to receive different types of electromagnetic signals through different internal antennas; the electromagnetic wave signals include: a GPS signal, a WLAN signal, a mobile terminal signal, and the like; wherein the mobile terminal signal includes a GSM signal, a WCDMA signal, and the like.

Here, before the electromagnetic wave signal is subjected to radio frequency processing, if the signal strength received by the antenna is not ideal, the signal received by the antenna may be first passed through the antenna matching network to enhance the signal received by the antenna; wherein the antenna matching network may be The circuit is composed of a resistor and a capacitor; here, the mobile terminal includes more than one radio frequency processing module, and performs radio frequency processing on the GPS signal, the WLAN signal, and the mobile terminal signal sent by different built-in antennas.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

claims

1. A built-in antenna, the built-in antenna includes: high-frequency antenna wiring, low-frequency antenna wiring, feeding point, grounding point, feeding foot, grounding foot, feeding conductive strip, grounding conductive strip; wherein,

The high-frequency antenna wiring and the low-frequency antenna wiring are connected through a feed point;

The feed point is connected to the feed pin through the feed conductive strip, and the feed pin is connected to the radio frequency circuit of the mobile terminal;

The grounding point is connected to the grounding pin through a grounding conductive strip, and the grounding pin is connected to the grounding terminal of the mobile terminal.

2. The built-in antenna according to claim 1, wherein the high-frequency antenna wiring is in a straight cylindrical shape, with one end connected to the feed point and the other end clear;

The low-frequency antenna wiring is in a straight cylindrical shape or a right-angled cylindrical shape, with one end connected to the feed point and the other end clear;

Correspondingly, the high-frequency antenna traces and the low-frequency antenna traces are generally linear, or the high-frequency antenna traces and the low-frequency antenna traces are generally right-angled.

3. A mobile terminal with a built-in antenna, the mobile terminal includes: more than one built-in antenna, more than one radio frequency module located on the printed circuit board PCB, and a ground terminal; wherein,

The one or more built-in antennas are respectively located in the clear space of the PCB, and are kept at a certain distance from the edge of the adjacent PCB side; the feed pins of the one or more built-in antennas are respectively connected to the input terminals of the corresponding one or more radio frequency modules; so The ground pins of more than one of the above built-in antennas are connected to the ground terminal;

The one or more radio frequency modules are configured to respectively receive radio frequency signals sent by the one or more built-in antennas, and perform corresponding radio frequency processing on the radio frequency signals;

The ground terminal is located on the PCB and is configured to provide a PCB ground point for the one or more built-in antennas.

4. The mobile terminal according to claim 3, wherein the built-in antenna includes: high-frequency antenna wiring, low-frequency antenna wiring, feeding point, grounding point, feeding foot, grounding foot, feeding conductive strip, grounding conduction band; where,

The grounding point is connected to the grounding pin through a grounding conductive strip, and the grounding pin is connected to the grounding end of the mobile terminal.

5. The mobile terminal according to claim 4, wherein the high-frequency antenna wiring is in a straight cylindrical shape, one end is connected to the feed point, and the other end is clear;

6. The mobile terminal according to claim 3, 4 or 5, wherein the one or more built-in antennas include: a first antenna, a second antenna, and a third antenna; the one or more radio frequency modules include a first radio frequency module, the second radio frequency module, the first radio frequency module; where,

The first antenna is configured to receive a global positioning system GPS signal and send the GPS signal to the first radio frequency module for processing;

The second antenna is configured to receive a wireless local area network WLAN signal and send the WLAN signal to the second radio frequency module for processing;

7. The mobile terminal according to claim 6, wherein the mobile terminal signals include: Global System for Mobile Communications GSM signals and Wideband Code Division Multiple Access WCDMA signals.

8. A communication method for a mobile terminal with a built-in antenna, setting more than one built-in antenna in the clear space of the mobile terminal PCB; the method also includes:

The more than one built-in antenna of the mobile terminal receives more than one electromagnetic wave signal, and the more than one radio frequency module of the mobile terminal performs radio frequency processing on the received more than one electromagnetic wave signal respectively.

9. The method according to claim 8, wherein the one or more built-in antennas are linear antennas or right-angle antennas, each keeping a certain distance from the edge of the adjacent PCB side; the feeding pins of the one or more built-in antennas are respectively connected to the input terminals of one or more corresponding radio frequency modules; the ground pins of the one or more built-in antennas are connected to the ground terminals in the mobile terminal.

10. The method according to claim 8 or 9, wherein the electromagnetic wave signal includes:

GPS signal, WLAN signal, mobile terminal signal;

The mobile terminal signals include GSM signals and WCDMA signals.