CN105703790A - Mobile terminal - Google Patents

Abstract

The invention discloses a mobile terminal, comprising: the device comprises a shell, a main board structure, a diversity receiving circuit and an NFC feed source. An accommodating space is defined in the shell, a metal frame is arranged on the peripheral wall of the accommodating space, and two first slits are arranged on the metal frame to define a first section which is insulated from other sections. The main board structure is arranged in the accommodating space, and a first clearance area through which magnetic lines of force can pass is defined between the main board structure and the first section. The diversity receiving circuit and the NFC feed are respectively connected with the first section. According to the mobile terminal disclosed by the invention, the radiating body of the diversity antenna is used for realizing NFC on the metal frame, so that the NFC antenna setting problem is solved, the antenna design cost and the antenna space are effectively reduced, the excessive segmentation on the metal frame is avoided, and the setting of the NFC antenna is ensured not to influence other antennas on the mobile terminal.

Description

mobile terminal

technical field

The present invention relates to the technical field of communication equipment, in particular to a mobile terminal.

Background technique

At present, most NFC (Near Field Communication, short-range wireless communication) antennas on mobile phones use a structure combining antenna coils and ferrite, and at the same time, the NFC antenna is attached to the battery rear case of the mobile phone. The cost of the antenna module of this structural solution is relatively high, and the overall thickness of the body is increased, which is not conducive to the thinner and thinner design of the body.

In the related art, the design scheme of connecting the NFC antenna line on the metal frame has also been proposed. Although the problem of setting up the NFC antenna has been solved, it is obviously impossible to only set the NFC antenna on terminal devices such as mobile phones, especially other antennas ( Such as GPS antenna, WiFi antenna) The necessity of setting is obviously better than that of NFC antenna. When there are too many antennas on the mobile phone and it is difficult to arrange them, manufacturers will still choose the traditional NFC solution combining coils and ferrite, and the problem of NFC antenna configuration has not yet been solved.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the present invention needs to propose a mobile terminal, and the arrangement of the NFC antenna on the mobile terminal can save space and cost.

The mobile terminal according to the embodiment of the present invention includes: a casing, a housing space is defined inside the casing, a metal frame is provided on the peripheral wall of the housing space, and two first slits are provided on the metal frame to A first section insulated from other sections is defined; a main board structure, the main board structure is arranged in the accommodation space, and a first section through which magnetic force lines can pass is defined between the main board structure and the first section. Clearance area; a diversity receiving circuit and an NFC feed, the diversity receiving circuit and the NFC feed are respectively connected to the first section.

According to the mobile terminal of the embodiment of the present invention, by connecting the diversity receiving circuit and the NFC feed source to the same section on the metal frame, the radiator of the diversity antenna is used on the metal frame to realize NFC, which not only solves the problem of NFC antenna setting, but also effectively reduces the antenna Design cost and antenna space, and avoid too many segments on the metal frame, and also ensure that the setting of the NFC antenna will not affect the setting of other antennas on the mobile terminal.

Specifically, the NFC feeder is connected to the first section through an NFC matching piece. NFC matching parts are used for impedance matching between the first section and the NFC feed source. Through debugging and optimizing the design, the purpose of efficiently receiving and processing NFC signals can be achieved, thereby improving the NFC signal receiving performance of the overall solution.

Specifically, the diversity receiving circuit is connected to the first section through a diversity receiving matching piece. Diversity receiving matching parts are used for impedance matching between the metal frame and the diversity receiving circuit. Through debugging and optimizing the design, the purpose of efficiently receiving and processing diversity antenna signals can be achieved.

In some embodiments, the mobile terminal further includes a GPS feed connected to the remaining segments. Therefore, the mobile terminal can also provide positioning and navigation services.

Optionally, the connection point between the GPS feed source and the remaining sections is located in the first clearance zone. The GPS antenna uses the first clear area for communication, which can reduce the area of the clear area, and the mobile terminal has a compact structure design.

In some embodiments, the mobile terminal further includes a WiFi feed connected to the remaining segments. Therefore, the mobile terminal can also network in a wireless fidelity connection within an effective range.

Optionally, the connection point between the WiFi feed source and the remaining sections is located in the first clear area. The WiFi antenna uses the first clear area for communication, which can reduce the area of the clear area, and the mobile terminal has a compact structure design.

In some embodiments, the main antenna feed of the mobile terminal is connected to the remaining segments.

Specifically, two second slits are provided on the remaining sections to define a second section insulated from each other and two intermediate sections, and the second section is located between the two intermediate sections. , a second clearance area through which magnetic force lines can pass is defined between the main board structure and the second section, and the main antenna feed is connected to the second section. The main antenna uses the second clear area for communication, which can ensure the signal propagation quality of the main antenna.

More specifically, the first section is located at the top of the mobile terminal, and the second section is located at the bottom of the mobile terminal. Thus, the main antenna signal and the diversity antenna signal can be guaranteed to the greatest extent.

Additional aspects and advantages of the invention 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 invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic diagram of a three-dimensional structure of a metal frame according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of a metal frame according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of an antenna distribution scheme of a mobile terminal according to an embodiment of the present invention.

Reference signs:

The mobile terminal 100, the accommodation space V,

Metal frame 1, first section 11, remaining sections 12, second section 121, middle section 122, first slit 101, second slit 102,

The first clearance zone v1, the second clearance zone v2,

Diversity receiving circuit 21, diversity receiving matching part 22,

NFC feed 31, NFC matching piece 32,

GPS feed 4, WiFi feed 5, main antenna feed 6.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes a mobile terminal 100 according to an embodiment of the present invention with reference to FIGS. 1-3 . The mobile terminal 100 may be a mobile electronic communication device such as a mobile phone or a tablet computer. For convenience of description, the mobile terminal 100 is used as a mobile phone for example.

The mobile terminal 100 according to the embodiment of the present invention includes: a casing (not shown in the figure), a main board structure (not shown in the figure), a diversity receiving circuit 21 and an NFC feed 31 .

A storage space V is defined inside the casing. As shown in FIG. 11 of the first section. That is, in the example of FIG. 1 , the two first slits 101 completely penetrate the metal frame 1 in the thickness direction of the mobile terminal 100 , and the part of the metal frame 1 between the two first slits 101 is the first segment 11 The part of the metal frame 1 except the first section 11 is called the rest section 12, and the first section 11 and the rest section 12 are completely disconnected and insulated from each other.

The main board structure is arranged in the accommodation space V, and a first clearance area v1 is defined between the main board structure and the first section 11 through which the magnetic lines of force can pass. The diversity receiving circuit 21 and the NFC feeder 31 are respectively connected to the first section 11 . In FIG. 2 , the main board structure is spaced apart from at least part of the first section 11 in the projection area A inside the metal frame 1 , and a first clearance area v1 is set in the space between the main board structure and the first section 11 .

Clearance zone refers to the area configured so that the magnetic field lines can pass through without being too much influence and obstruction. The external magnetic force lines penetrate the casing of the mobile terminal 100 through the clearance area, and the magnetic force lines form an induced current on the metal frame 1 , and the electromagnetic field generated by the induced current propagates to the card or card reader on the mobile terminal 100 for communication.

Wherein, the motherboard structure includes a circuit board of the mobile terminal 100, and the circuit board is arranged in the housing, and the circuit board will affect the passage of magnetic force lines, so the headroom needs to be set in the area between the metal frame and the circuit board. Of course, the main board structure may also include metal parts with conductive properties, etc., and the metal parts are arranged in the casing, and the metal parts will also affect the passage of the magnetic force lines.

The diversity receiving circuit 21 is connected to the first section 11, and the first section 11 is equivalent to the radiation conductor of the diversity antenna, that is, the first section 11 is used to receive the diversity antenna signal, and the diversity receiving circuit 21 is used to process the diversity antenna signal. The NFC feed 31 is connected to the first section 11, the first section 11 is equivalent to the radiation conductor of the NFC antenna, that is, the first section 11 is used to receive the NFC signal, and the NFC feed 31 is used to process the NFC signal to realize Near Field Communication. That is, the first section 11 serves not only as the radiation conductor of the diversity receiving circuit 21, but also as the radiation conductor of the NFC antenna.

Using the radiator of the diversity antenna on the metal frame 1 to realize NFC can not only successfully receive NFC signals, but also does not need to reserve structural design space inside the terminal device, which is beneficial to reduce the overall thickness of the mobile terminal 100, and does not need to add ferrite materials. Save material cost, effectively reduce antenna design cost and antenna space. Moreover, the NFC setting structure is flexible and changeable, which can improve the receiving sensitivity of the NFC antenna.

It should be noted that NFC (Near Field Communication, short-range wireless communication) is an extremely short-range radio frequency identification communication protocol technical standard. The NFC signal transmission range is small, but the transmission is fast and the energy efficiency is low. Setting the NFC communication function on the mobile terminal 100 can serve as an airport boarding verification, access control key, transportation card, credit card, payment card and other roles.

According to the mobile terminal 100 of the embodiment of the present invention, by connecting the diversity receiving circuit 21 and the NFC feed source 31 to the same section on the metal frame 1, the radiator of the diversity antenna on the metal frame 1 is used to realize NFC, which not only solves the problem of NFC antenna setting The problem is to effectively reduce the antenna design cost and antenna space, avoid too many segments on the metal frame 1 , and ensure that the setting of the NFC antenna will not affect the setting of other antennas on the mobile terminal 100 .

Specifically, as shown in FIG. 3 , the NFC feed 31 is connected to the first section 11 through an NFC matching piece 32 . The NFC matching part 32 is used for impedance matching between the first section 11 and the NFC feed 31 , and the purpose of efficiently receiving and processing NFC signals can be achieved through debugging and optimizing the design, thereby improving the NFC signal receiving performance of the overall solution.

Optionally, the NFC matching part 32 can be a matching circuit formed by connecting electronic components such as inductors, capacitors or resistors. The connection of the inductor can be used to connect the metal frame 1 to increase the inductance value of the NFC antenna, and the connection of the capacitor can be used to filter out high frequency interference signal. The NFC matching component 32 can adopt the circuit structure for matching NFC disclosed in the prior art, which is not specifically limited here.

Specifically, as shown in FIG. 3 , the diversity receiving circuit 21 is connected to the first section 11 through a diversity receiving matching part 22 . The diversity receiving matching part 22 is used for impedance matching between the metal frame 1 and the diversity receiving circuit 21 , and the purpose of efficiently receiving and processing diversity antenna signals can be achieved through debugging and optimizing the design.

Optionally, the diversity receiving matching component 22 may be a matching circuit formed by connecting electronic components such as inductors, capacitors, or resistors. The diversity receiving matching part 22 may adopt a circuit structure for matching diversity antennas disclosed in the prior art, which is not specifically limited here.

Of course, if the impedance characteristics of the NFC feed source 31 and the diversity receiving circuit 21 meet the requirements, corresponding matching parts may not be provided, which is not limited here.

In some embodiments, as shown in FIG. 3 , the mobile terminal 100 further includes a GPS feed 4 connected to the remaining segments 12 . The GPS feed 4 is connected to the remaining section 12, and the remaining section 12 of the metal frame 1 is used as the radiation conductor of the GPC antenna.

GPS (Global Positioning System, Global Positioning System) is a system that uses GPS positioning satellites to perform real-time positioning and navigation around the world, also known as the Global Positioning System. The GPS feed 4 is set on the mobile terminal 100, so that the mobile terminal 100 can also provide positioning and navigation services.

Optionally, the connection point between the GPS feed source 4 and the rest of the sections 12 is located in the first clearance zone v1, that is, the GPS signal magnetic force lines penetrate the casing of the mobile terminal 100 through the first clearance zone v1, and the magnetic force lines are in the remaining areas. An induced current is formed on segment 12 for communication. The GPS antenna utilizes the first clear area v1 for communication, which can reduce the area of the clear area, and the mobile terminal 100 has a compact structure.

In some embodiments, the mobile terminal 100 also includes a WiFi feed 5 connected to the remaining section 12 . Connect the WiFi feed 5 to the remaining section 12, and use the remaining section 12 of the metal frame 1 as the radiation conductor of the WiFi antenna.

WiFi (Wireless Fidelity, Wireless Fidelity) is a technology that connects terminals such as personal computers and handheld devices to each other in a wireless manner. The WiFi feeder 5 is set on the mobile terminal 100, so that the mobile terminal 100 can also network in a wireless fidelity connection within an effective range.

Optionally, the connection point between the WiFi feed source 5 and the rest of the sections 12 is located in the first clearance zone v1, that is, the magnetic force lines of the WiFi signal penetrate the casing of the mobile terminal 100 through the first clearance zone v1, and the magnetic force lines are in the rest of the area. An induced current is formed on segment 12 for communication. The WiFi antenna utilizes the first clear area v1 for communication, which can reduce the area of the clear area, and the mobile terminal 100 has a compact structure.

In some embodiments, the main antenna feed 6 of the mobile terminal 100 is connected to the remaining section 12 as shown in FIG. 3 . The main antenna feed 6 is connected to the remaining section 12, and the remaining section 12 of the metal frame 1 is used as the radiation conductor of the main antenna.

Specifically, as shown in FIGS. 1-3 , two second slits 102 are provided on the remaining sections 12 to define a second section 121 and two intermediate sections 122 that are insulated from each other. The second section 121 Located between the two middle sections 122 , a second clear area v2 is defined between the main board structure and the second section 121 through which the magnetic lines of force can pass, and the main antenna feed 6 is connected to the second section 121 .

That is to say, the main antenna signal magnetic force lines penetrate the casing of the mobile terminal 100 through the second clearance zone v2, and the magnetic force lines form an induced current on the second section 121 for communication, and the main antenna utilizes the second clearance zone v2 for communication, which can Ensure the signal propagation quality of the main antenna.

More specifically, as shown in FIG. 3 , the first section 11 is located at the top of the mobile terminal 100 , and the second section 121 is located at the bottom of the mobile terminal 100 . Since the human body is a conductor, when the mobile terminal 100 is held by a human hand, if a certain section of the metal frame 1 is in direct contact with the human hand, the corresponding antenna signal on this section will be affected.

According to people's usual holding habit, the human hand is usually held in the middle of the terminal. By arranging the first section 11 and the second section 121 at the top and bottom of the mobile terminal 100 respectively, the main antenna signal and the diversity antenna signal can be guaranteed to the greatest extent.

In a specific embodiment of the present invention, the metal frame 1 of the mobile terminal 100 is connected with the main antenna feed 6, the NFC feed 31, the GPS feed 4 and the WiFi feed 5, and the metal frame 1 is also connected with a diversity receiver Circuit 21.

The metal frame 1 is formed as a rectangular frame, and the metal frame 1 is divided into a first segment 11, a second segment 121 and two middle segments separated from each other by two first slits 101 and two second slits 102 122, wherein one middle section 122 is connected between one end of the first section 11 and one end of the second section 121, and another middle section 122 is connected between the other end of the first section 11 and the second section 121 between the other ends. The first clearance zone v1 is set between the first section 11, the upper ends of the two middle sections 122 and the mainboard structure, and the second clearance zone v2 is set between the second section 121, the lower ends of the two middle sections 122 and the mainboard structure. between structures.

Specifically, the slits of the mobile terminal 100 are filled with an insulating layer such as plastic parts to play the role of connecting each section of the metal frame 1, and at the same time ensure that the shape of the metal frame 1 forms a closed ring to ensure the sealing of the body and ensure that the body aesthetic appearance.

Diversity receiving circuit 21 , NFC feed 31 , GPS feed 4 and WiFi feed 5 are respectively located on the upper part of mobile terminal 100 , and main antenna feed 6 is located on the lower part of mobile terminal 100 . The NFC feed 31 is connected to the diversity receiving circuit 21 on the first section 11, the main antenna feed 6 is connected to the second section 121, the GPS feed 4 is connected to a middle section 122, and the WiFi feed 5 is connected to On another middle section 122 , the connection points of the GPS feed 4 and the WiFi feed 5 and the middle section 122 are respectively located in the first clearance zone v1 .

In FIG. 3 , the NFC feed 31 and the diversity receiving circuit 21 are connected to the left end of the first section 11 , and the right end of the first section 11 is grounded. The GPS feed 4 is located on the right side of the upper part of the mobile terminal 100 , and the WiFi feed 5 is located on the left side of the upper part of the mobile terminal 100 . Certainly, the antenna connection position and the grounding position on the first section 11 can be interchanged, and the connection positions of the GPS feed 4 and the WiFi feed 5 can also be interchanged.

Arranging the above-mentioned feed sources at the upper and lower ends of the mobile terminal 100 can avoid sharp deterioration of the antenna performance due to human hands when the mobile terminal 100 is in use.

In addition, if necessary, the GPS feed 4, the WiFi feed 5, and the main antenna feed 6 can also be connected to the metal frame 1 through corresponding matching pieces (not shown in the figure), so that the metal frame 1 and the Impedance matching between corresponding feed sources, through debugging and optimizing the design to efficiently receive and process antenna signals. The matching component can adopt the structure of the matching circuit disclosed in the prior art, which is not specifically limited here.

It can be understood that the structure of the above-mentioned antenna feed source, the structure of the diversity receiving circuit 21, and the specific principles of antenna signal propagation and signal processing are already in the prior art, and will not be repeated here.

In describing the present invention, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, are constructed and operate in a particular orientation and therefore are not to be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples" or "some examples" mean specific features described in connection with the embodiment or example, A structure, material or characteristic is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. a mobile terminal, it is characterised in that including:

Casing, limits accommodation space in described casing, the perisporium in described accommodation space is provided with metal edge frame, and described metal edge frame is provided with two first and cracks to limit the first section insulated with all the other sections；

Mainboard structure, described mainboard structure is located in described accommodation space, limits and be available for the first clearance zone that the magnetic line of force passes through between described mainboard structure and described first section；

Diversity reception circuit and NFC feed, described diversity reception circuit and described NFC feed are connected with described first section respectively。

2. mobile terminal according to claim 1, it is characterised in that described NFC feed is connected with described first section by NFC matching parts。

3. mobile terminal according to claim 1, it is characterised in that described diversity reception circuit is connected with described first section by diversity reception matching parts。

4. mobile terminal according to claim 1, it is characterised in that also include GPS feed, described GPS feed is connected on all the other sections described。

5. mobile terminal according to claim 4, it is characterised in that the junction point of described GPS feed and all the other sections described is positioned at described first clearance zone。

6. mobile terminal according to claim 1, it is characterised in that also include WiFi feed, described WiFi feed is connected on all the other sections described。

7. mobile terminal according to claim 6, it is characterised in that the junction point of described WiFi feed and all the other sections described is positioned at described first clearance zone。

8. mobile terminal according to claim 1, it is characterised in that the main antenna feed of described mobile terminal is connected on all the other sections described。

9. mobile terminal according to claim 8, it is characterized in that, all the other sections described are provided with two second the second sections cracking to limit mutually insulated and two centre portions, described second section is between said two centre portion, limiting between described mainboard structure and described second section and be available for the second clearance zone that the magnetic line of force passes through, described main antenna feed is connected with described second section。

10. mobile terminal according to claim 9, it is characterised in that described first section is positioned at the top of described mobile terminal, and described second section is positioned at the bottom of described mobile terminal。