WO2018145451A1

WO2018145451A1 - Mobile terminal and antenna thereof

Info

Publication number: WO2018145451A1
Application number: PCT/CN2017/100838
Authority: WO
Inventors: 郁小民; 郑小飞
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-02-08
Filing date: 2017-09-07
Publication date: 2018-08-16
Also published as: CN108400425B; CN108400425A

Abstract

Disclosed is an antenna of a mobile terminal, comprising N segments of metal frames of the mobile terminal, a metal ground layer, a feed circuit, and a frequency switching device, the N is an integer greater than or equal to 1; at least one of the N segments of metal frames is used for accessing the feed circuit by means of a feed point, the metal frame accessing the feed circuit serves as a radiator of the antenna, and the radiator radiates electromagnetic wave to make the antenna send and receive signals; the metal ground layer is provided in a shell of the mobile terminal; the frequency switching device is used for controlling different segments of metal frames to access the feed circuit so that the antenna words at different frequencies. Also disclosed is a mobile terminal provided with the antenna.

Description

Mobile terminal and antenna thereof

Technical field

The present invention relates to terminal communication technologies, and in particular, to a mobile terminal and an antenna thereof.

Background technique

In order to make the appearance of mobile terminals such as mobile phones more fashionable and more comfortable, the existing mobile phones are increasingly using metal materials to make mobile phone casings. However, when a metal case is used to make a mobile phone case, the metal case blocks the transmission and reception of the signal of the mobile phone antenna, thereby causing the signal of the mobile phone to deteriorate.

In order to solve this problem, the mobile phone antenna is currently designed by the following method: the metal frame of the mobile phone is used as a part of the radiator of the mobile phone, and combined with the brackets inside the mobile phone to form a mobile phone antenna.

In the process of implementing the above technical solution, the inventor has found that at least the following problems exist in the prior art: in order to enable the mobile phone antenna to work in different frequency bands when designing the mobile phone antenna, the bracket wire inside the mobile phone sometimes needs to be in contact with the metal frame. At this time, because the contact position of the bracket wire and the metal frame is limited by other structures of the mobile phone, the design of the mobile phone antenna is difficult; in addition, the antenna of the mobile phone needs to be routed through the bracket, which will occupy a large space of the mobile phone, resulting in other structures in the mobile phone. Design is difficult.

Summary of the invention

In view of this, embodiments of the present invention are directed to providing a mobile terminal and an antenna thereof, which can make the design of the mobile terminal antenna and the design of the internal structure of the mobile terminal easier.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

An embodiment of the present invention provides an antenna of a mobile terminal, where the antenna includes an N-segment metal frame, a metal ground layer, a feeding circuit, and a frequency switching device of the mobile terminal, where N is an integer greater than or equal to 1;

At least one metal frame of the N-section metal frame is disposed to be connected to the feeding circuit through a feeding point, and a metal frame of the feeding circuit is used as a radiator of the antenna, and the radiator radiates electromagnetic waves. Making the antenna transmit and receive signals;

The metal formation is disposed in the mobile terminal housing;

The frequency switching device is configured to control different metal frames of the segment to access the feeding circuit to operate the antenna at different frequencies.

Optionally, the frequency switching device is M single-pole multi-throw switches, and M is an integer greater than or equal to 1.

Optionally, the N is 5, the M is 2, and the single-pole multi-throw switch is a single-pole 4-throw switch; the antenna includes a 5-segment metal frame and two single-pole 4-throw switches;

The 5-segment metal frame includes a first side frame, a first corner frame, a bottom end frame, a second corner frame, and a second side frame. The first side frame is disposed on a side of the long side of the mobile terminal. The second side frame is disposed on a side of the other long side of the mobile terminal, the bottom end frame is disposed at a bottom end of the mobile terminal, and the first corner frame is disposed on the first side frame and the Between the bottom end frames, the second corner frame is disposed between the second side frame and the bottom end frame;

The antenna further includes a first empty pin and a second empty pin, the two single-pole 4-throw switches including a first single-pole 4-throw switch and a second single-pole 4-throw switch; one end of the first single-pole 4-throw switch Connected to the bottom end frame, the other end of the first single-pole 4-throw switch is switched between the first side frame, the first corner frame, the metal ground layer or the first empty pin, The antenna is operated in different frequency bands; one end of the second single-pole 4-throw switch is connected to the bottom end frame, and the other end of the second single-pole 4-throw switch is in the second side frame, the first Switching between the two corner frames, the metal formation or the second empty pin causes the antenna to operate in different frequency bands.

Optionally, the feeding point is disposed on the bottom end frame.

Optionally, the N-section metal frame has a symmetrical structure.

Optionally, when the M is an even number, the M single-pole multi-throw switches are disposed at a symmetric position of the mobile terminal.

Optionally, the metal formation is a magnesium aluminum alloy material.

The embodiment of the present invention further provides a mobile terminal, where the mobile terminal is provided with an antenna of any mobile terminal provided by the implementation of the present invention.

In the mobile terminal and the antenna provided by the embodiment of the present invention, the radiator of the antenna is a multi-segment metal frame of the mobile terminal, and no radiator is disposed inside the mobile terminal, so that the antenna transceiver signal is no longer shielded by the mobile terminal casing and other The effect is improved, and the ability of the antenna to transmit and receive signals is improved. Moreover, when the radiator of the antenna is a multi-section metal frame of the mobile terminal, space is also saved inside the casing of the mobile terminal, which makes the design of other structures of the mobile terminal more convenient. In addition, the mobile terminal antenna provided by the embodiment of the present invention adjusts the operating frequency of the antenna through M single-pole multi-throw switches, without requiring other circuit settings, reducing the setting of the circuit in the mobile terminal; likewise, moving The interior of the terminal housing saves space, making the design of other structures of the mobile terminal more convenient; moreover, the operation frequency of the antenna can be adjusted only by the M single-pole multi-throw switch, so the operation process of adjusting the frequency band is convenient.

DRAWINGS

FIG. 1 is a schematic diagram of an antenna of a mobile terminal according to an embodiment of the present disclosure;

2 is an enlarged schematic view of the lower end of FIG. 1 according to an embodiment of the present invention;

3A is a schematic diagram of return loss of an antenna of a mobile terminal according to an embodiment of the present invention;

FIG. 3B is a schematic diagram of return loss of an antenna of another mobile terminal according to an embodiment of the present disclosure;

FIG. 3C is a schematic diagram of return loss of an antenna of another mobile terminal according to an embodiment of the present invention; FIG.

3D is a schematic diagram of return loss of an antenna of another mobile terminal according to an embodiment of the present invention;

FIG. 3E is a schematic diagram of return loss of an antenna of another mobile terminal according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

In the embodiment of the present invention, the mobile terminal can be implemented in various forms. For example, the terminals described in the present invention may include, for example, mobile phones, smart phones, notebook computers, digital broadcast receivers, personal digital assistants (PDAs), tablet computers (PADs), portable multimedia players (PMPs), navigation devices, and the like. Mobile terminals and fixed terminals such as digital TVs, desktop computers, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, those skilled in the art will appreciate that configurations in accordance with embodiments of the present invention can be applied to fixed type terminals in addition to components that are specifically for mobile purposes.

Embodiment 1

An embodiment of the present invention provides an antenna of a mobile terminal. As shown in FIG. 1 , the antenna of the mobile terminal includes: an N-section metal frame 100 of the mobile terminal, a metal formation 200, a feeding circuit (not shown in FIG. 1 ), and Frequency switching device 400.

The metal ground layer 200 has a rectangular plate-like structure and is disposed in the mobile terminal housing as a grounding of the antenna. Optionally, the size of the metal formation 200 is the same as the area of the mobile terminal, and is disposed in the middle of the mobile terminal housing; where the area of the metal formation 200 refers to the area of the rectangle, and the area of the mobile terminal may be the area of the screen.

Optionally, the metal formation 200 is any metal material that can conduct electricity. For example, the metal formation 200 is a magnesium aluminum alloy material. The thickness of the metal formation 200 may be 0.4-0.6 mm, and the thickness of the metal formation 200 may be set according to the specific structure of the mobile terminal. When the space inside the mobile terminal is large, the thickness of the metal formation 200 is thick, for example, 0.6 mm. When the space inside the mobile terminal is small, the thickness of the metal formation 200 is thin, for example, 0.4 mm.

The at least one metal frame of the N-section metal frame 100 is connected to the feeding circuit through the feeding point 301. Here, the feeding point 301 can be disposed on at least one metal frame of the access feeding circuit; The metal frame of the circuit acts as a radiator of the antenna; the current in the feeding circuit flows into the radiator through the feeding point 301, and the current in the body generates electromagnetic waves; the radiator radiates electricity Magnetic waves cause the antenna to send and receive signals. Where N is an integer greater than or equal to 1.

The frequency switching device 400 is configured to control different sections of the metal frame to access the feeding circuit, so that the antenna operates in different frequency bands.

The feeding circuit can be disposed on the main board of the mobile terminal, and other related contents of the feeding circuit are not specifically described.

Further, referring to FIG. 1 or FIG. 2, the N-section metal frame 100 and the frequency switching device 400 are further introduced:

For the N-segment metal frame 100, it can be seen from the above that when different metal frames are connected to the feeding circuit, the antenna operates in different frequency bands. Exemplarily, when N is 5, the antenna includes a 5-segment metal frame, and as shown in FIG. 1 or FIG. 2, the 5-segment metal frame is a first side frame 101, a first corner frame 102, and a bottom end frame 103, respectively. a second corner frame 104 and a second side frame 105; the first side frame 101 is disposed on one side of the long side of the mobile terminal, the second side frame 105 is disposed on one side of the other long side of the mobile terminal, and the bottom end frame 103 is disposed on The first corner frame 102 is disposed between the first side frame 101 and the bottom end frame 103, and the second corner frame 104 is disposed between the second side frame 105 and the bottom end frame 103.

Exemplarily, when only the bottom end frame 103 is inserted into the feeding circuit, the antenna operates in the first frequency band, for example, 990 MHz; when the bottom end frame 103 and the first side frame 101 are simultaneously connected to the feeding circuit The antenna operates in the second frequency band, for example 2.25 GHz.

In addition, it should be noted that when the antenna includes a 5-segment metal frame, the first side frame 101 and the second side frame 105 are used to lengthen the radiator of the antenna, so that the length of the radiator of the antenna can be long or short, and thus The antenna is operated in more frequency bands to optimize the antenna.

In addition, each working frequency band of the antenna may correspond to one antenna type. For example, when the antenna operates at 1575 MHz, the antenna type is a Global Positioning System (GPS) antenna; when the antenna operates at 2.4 GHz, the antenna The type is a wireless fidelity (WIFI, WIreless-FIdelity) antenna.

Further, a gap is formed between the N-section metal frames, and the gap can be filled by a non-metal material of the mobile phone case. Alternatively, the slit may have a size of 0.5-2.0 mm. The size of the gap is also The determination may be made according to the actual situation of the mobile terminal, such as the structure size of the mobile terminal itself, and the like.

Optionally, when the mobile terminal is a mobile phone, the feeding point 301 can be disposed on the bottom end frame 103, and the bottom end frame 103 is the main radiator of the antenna, that is, the radiator for talking.

In addition, when the side frames of the mobile terminal are not all used as the radiator of the antenna, the frame that is not used as the antenna radiator may be a metal frame or a non-metallic frame. For example, in the frame of the mobile terminal shown in FIG. 1, only the bottom frame of the two sides is the radiator of the antenna, and the top frame is not the radiator of the antenna; the top frame (the top frame has three frames) can be electrically conductive. The metal material may also be a non-metal material that does not have electrical conductivity.

Optionally, the N-segment metal frame 100 has a symmetrical structure. Exemplarily, referring to FIG. 1, the five-segment metal frame in FIG. 1 is symmetrical with respect to a line passing through the center of gravity of the mobile terminal and the vertical bottom end frame 103.

Optionally, the N-section metal frame 100 is made of an aluminum alloy material.

For the frequency switching device 400, optionally, the frequency switching device 400 is M single-pole multi-throw switches, and M is an integer greater than or equal to 1.

Illustratively, the antenna includes two single-pole, four-throw switches, that is, M is two, and the single-pole multi-throw switch is a single-pole, four-throw switch. The two single-pole four-throw switches are a first single-pole 4-throw switch 401 and a second single-pole 4-throw switch 402, respectively. In addition, the antenna further includes a first empty pin 106 and a second empty pin 107 (which may be a blank portion in FIG. 2, ie, nothing is connected to the empty one).

Further, the two single-pole 4-throw switches adjust the operating frequency band of the antenna by the following method: one end 401a of the first single-pole 4-throw switch 401 is connected with the bottom end frame 103 (as shown in FIG. 2), and the first single-pole 4-throw switch 401 The other end 401b switches between the first side frame 101, the first corner frame 102, the metal formation 200 or the first empty pin 106 to operate the antenna in different frequency bands; for example, the other end of the first single-pole 4-throw switch 401 When the 401b is connected to the metal formation 200, only the bottom end frame 103 is connected to the feeding circuit, and the operating frequency of the antenna is 990 MHz; when the other end 401b of the first single-pole 4-throw switch 401 is connected to the first side frame 101, The first side frame 101 is also connected to the feeding circuit except that the bottom end frame 103 is connected to the feeding circuit. At this time, the working frequency of the antenna is 2.25 GHz. Similarly, one end 402a and the bottom end frame 103 of the second single-pole 4-throw switch 402 The other end 402b of the second single-pole 4-throw switch 402 is switched between the second side frame 105, the second corner frame 104, the metal ground layer 200 or the second empty pin 107, and the antenna can also be operated in different frequency bands. .

In addition, the positions of the first empty pin 106 and the second empty pin 107 are set as follows: the first empty pin 106 and the second empty pin 107 are disposed in the vicinity of the M single-pole multi-throw switches, and M are guaranteed. The other end of the single-pole multi-throw switch can be connected to the first empty pin 106 and the second empty pin 107; or, the other end of the M single-pole multi-throw switch can be directly thrown out.

Further, since the frequency switching device 400 includes two single-pole, four-throw switches, and each of the switches can have four different connection methods, there are a total of 16 different connection methods. For convenience of description, the connection positions (the first side frame 101, the first corner frame 102, the metal ground layer 200, and the first empty pin 106) of the other end 401b of the first single-pole 4-throw switch 401 and the respective metal frames are sequentially recorded. Is a1, a2, a3, and a4; a connection position with the other metal frame of the second single-pole 4-throw switch 402 (the second side frame 105, the second corner frame 104, the metal ground layer 200, and the second empty pin) 107) are sequentially recorded as b1, b2, b3, and b4, respectively. Then 16 different connection methods include: (a1, b1), (a1, b2), (a1, b3), (a1, b4), (a2, b1), (a2, b2), (a2, b3) ), (a2, b4), (a3, b1), (a3, b2), (a3, b3), (a3, b4), (a4, b1), (a4, b2), (a4, b3), (a4, b4).

It can be seen from the above that, when the value of N is large, that is, the antenna includes more metal frames, the metal frame is more connected to the single-pole multi-throw switch; when the value of N is smaller, the antenna includes fewer metal frames. The metal frame is less connected to the single-pole multi-throw switch. Therefore, the value of N can be set according to the actual situation of the working frequency band of the antenna required by the mobile terminal. When the working frequency band of the antenna required by the mobile terminal is large, the value of N is larger; when the working frequency band of the antenna required by the mobile terminal is higher When there is little time, the value of N is small to ensure that the frequency band included in the antenna satisfies the use of the mobile terminal.

It should be noted that when the first single-pole 4-throw switch 401 or the second single-pole 4-throw switch 402 is connected to the metal formation 200, the antenna includes a feeding point and at least one grounding point, that is, the antenna is a planar inverted-F antenna at this time. (PIFA, Planar Inverted F-shaped Antenna). When the first single When either end of the knife 4 throw switch 401 or the second single pole 4 throw switch 402 is not connected to the metal formation 200, the antenna includes only one feed point, and does not include a ground point, that is, the antenna is a monopole antenna. The working principle of the planar inverted F antenna and the monopole antenna is not described in the prior art.

Optionally, still referring to FIG. 1 or FIG. 2, when M is an even number, the M single-pole multi-throw switches are disposed at a symmetrical position of the mobile terminal. For example, in FIG. 1 and FIG. 2, the antenna includes two single-pole multi-throw switches, and the two single-pole multi-throw switches pass the center of gravity of the mobile terminal and the linear symmetry of the vertical bottom end frame 103

It should be noted that the frequency switching device 400 can also be other numbers of single-pole multi-throw switches, and can be set to 1 to 4, and 1 or 2 are generally set in practical applications. When the frequency switching device 400 includes a plurality of single-pole multi-throw switches, the frequency switching device 400 can adjust a connection manner of more metal frames to the frequency switching device 400, so that the antenna includes more different numbers and shapes of radiators. The different shapes described herein mainly mean that the length of the antenna radiator is different, so that the antenna includes more working frequency bands; when the frequency switching device 400 includes fewer single-pole multi-throw switches, the frequency switching device 400 can adjust less. The metal frame is connected to the frequency switching device 400, so that the antenna includes fewer and different shapes of radiators, and thus the antenna has a smaller operating frequency band. Therefore, the number of single-pole multi-throw switches included in the frequency switching device 400 is determined by the actual situation of the antenna required by the mobile terminal. When the mobile terminal requires an antenna with a large operating frequency band, the frequency switching device 400 includes a larger number of single-pole multi-throwing devices. Switch; when the mobile terminal requires an antenna with a lower operating frequency band, the frequency switching device 400 includes a smaller number of single-pole multi-throw switches. Exemplarily, when the mobile terminal requires an antenna of 10 working frequency bands, the frequency switching device 400 includes three single-pole multi-throw switches; when the mobile terminal requires four working frequency bands, the corresponding frequency switching device 400 includes a single knife. Multi-throw switch.

It should also be noted that the frequency switching device 400 can also be M multi-tool multi-throw switches. For example, the frequency switching device 400 can also be a double pole double throw switch. Optionally, the double pole double throw switch is installed at a position where the first single pole 4 throw switch 401 is installed. Of course, the double pole double throw switch can also be installed at the position of the second single pole 4 throw switch 402. At this time, the double-pole double-throw switch includes three connecting ends, which are respectively a first connecting end, a second connecting end (the first end with a throwing knife) and a third connecting end (the second with a throwing knife) end).

Exemplarily, the indicator in FIG. 1 or FIG. 2 is taken as an example. At this time, the first connection end of the double-pole double-throw switch is connected to the bottom end frame 103, and the second connection end is connected to the metal ground layer 200, and the third connection end is connected. The first side frame 101 is connected to form a planar inverted F antenna. Of course, a monopole antenna can also be constructed. The connection method is as follows: the first connection end is still connected to the bottom end frame 103, the second connection end is connected to the first side frame 101, and the third connection end is connected to the first empty pin 106. Of course, when the frequency switching device 400 is a double-pole double-throw switch, there are other connection methods, which will not be described in detail here.

In addition, referring to FIG. 3A-3E, the embodiment of the present invention also provides a return loss diagram corresponding to five connection modes when N is 5 and the frequency switching device 400 is two single-pole 4-throw switches. The five connection modes are (a3, b3), (a1, b3), (a3, b1), (a2, b2), and (a2, b1). As shown in FIG. 3A, when the connection mode is (a3, b3), the operating frequency of the antenna includes 850 megahertz, 1.85 GHz and 2.25 GHz; as shown in FIG. 3B, when the connection mode is (a1, b3) When the antenna operates at a frequency of 2.1 GHz; as shown in FIG. 3C, when the connection mode is (a3, b1), the operating frequency of the antenna is 2.42 GHz; as shown in FIG. 3D, when the connection mode is (a2, In b2), the operating frequency of the antenna is 990 MHz; as shown in Fig. 3E, when the connection mode is (a2, b1), the operating frequency of the antenna is 2.65 GHz.

In addition, it should be noted that other metal frames of the mobile terminal can also be used as part of the antenna radiator, and different antennas are designed in combination with other structures. For example, the bottom end frame and the top end frame of the mobile terminal can also be used as a part of the antenna radiator, and the laser direct forming (LDS) technology is used to route the line and the bottom end frame and the top border on the rear shell of the mobile terminal. Contact can also be used as a radiator for the antenna to design the desired antenna. It is also possible to design other different antennas, which will not be described in detail here.

In summary, in the antenna of the mobile terminal provided by the embodiment of the present invention, the radiator of the antenna is a multi-segment metal frame of the mobile terminal, and no radiator is disposed inside the mobile terminal, so that the antenna transceiver signal is no longer affected by the mobile terminal. The shielding of the outer casing and other effects, thereby improving the ability of the antenna to transmit and receive signals; and, when the radiator of the antenna is a multi-section metal frame of the mobile terminal, space is also saved inside the casing of the mobile terminal, which makes the design of other structures of the mobile terminal more convenient. . In addition, the mobile terminal antenna provided by the embodiment of the present invention adjusts the operating frequency of the antenna by using M single-pole multi-throw switches, without requiring other circuit settings, and reducing the number of the mobile terminal. The circuit arrangement also saves space inside the housing of the mobile terminal, which makes the design of other structures of the mobile terminal more convenient; and only needs to switch the operating frequency of the antenna through M single-pole multi-throw switches, so the frequency band is adjusted. The operation process is convenient.

Embodiment 2

The embodiment of the invention further provides a mobile terminal, and the mobile terminal is provided with any one of the antennas shown in the first embodiment.

It should be noted that all the content of the antennas involved in the embodiment of the mobile terminal can be described in detail in the first embodiment of the method, and details are not described herein.

In summary, in the antenna of the mobile terminal provided by the embodiment of the present invention, the radiator of the antenna is a multi-segment metal frame of the mobile terminal, and no radiator is disposed inside the mobile terminal, so that the antenna transceiver signal is no longer affected by the mobile terminal. The shielding of the outer casing and other effects, thereby improving the ability of the antenna to transmit and receive signals; and, when the radiator of the antenna is a multi-section metal frame of the mobile terminal, space is also saved inside the casing of the mobile terminal, which makes the design of other structures of the mobile terminal more convenient. . In addition, the mobile terminal antenna provided by the embodiment of the present invention adjusts the operating frequency of the antenna through M single-pole multi-throw switches, without requiring other circuit settings, reducing the setting of the circuit in the mobile terminal; likewise, moving The interior of the terminal housing saves space, making the design of other structures of the mobile terminal more convenient; moreover, the operation frequency of the antenna can be adjusted only by the M single-pole multi-throw switch, so the operation process of adjusting the frequency band is convenient.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to general purpose computers, dedicated computing a processor, an embedded processor, or a processor of another programmable data processing device to produce a machine such that instructions executed by a processor of a computer or other programmable data processing device are generated for implementing a process or processes in a flowchart And/or a block diagram of a device in a box or a plurality of functions specified in a plurality of blocks.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Industrial applicability

Claims

An antenna of a mobile terminal, the antenna includes an N-segment metal frame of a mobile terminal, a metal ground layer, a feeding circuit, and a frequency switching device, wherein the N is an integer greater than or equal to 1;

At least one metal frame of the N-section metal frame is disposed to be connected to the feeding circuit through a feeding point, and a metal frame of the feeding circuit is used as a radiator of the antenna, and the radiator radiates electromagnetic waves. Making the antenna transmit and receive signals;

The metal formation is disposed in the mobile terminal housing;

The frequency switching device is configured to control different metal frames of the segment to access the feeding circuit to operate the antenna at different frequencies.
The antenna according to claim 1, wherein said frequency switching means is M single-pole multi-throw switches, and M is an integer greater than or equal to 1.
The antenna according to claim 2, wherein said N is 5, said M is 2, said single-pole multi-throw switch is a single-pole 4-throw switch; said antenna comprises a 5-segment metal frame and 2 single-pole 4-throw switch;

The 5-segment metal frame includes a first side frame, a first corner frame, a bottom end frame, a second corner frame, and a second side frame. The first side frame is disposed on a side of the long side of the mobile terminal. The second side frame is disposed on a side of the other long side of the mobile terminal, the bottom end frame is disposed at a bottom end of the mobile terminal, and the first corner frame is disposed on the first side frame and the Between the bottom end frames, the second corner frame is disposed between the second side frame and the bottom end frame;

The antenna further includes a first empty pin and a second empty pin, the two single-pole 4-throw switches including a first single-pole 4-throw switch and a second single-pole 4-throw switch; one end of the first single-pole 4-throw switch Connected to the bottom end frame, the other end of the first single-pole 4-throw switch is at the first side frame, the first corner frame, the metal ground layer or the first empty pin Switching between the antennas to operate in different frequency bands; one end of the second single-pole 4-throw switch is connected to the bottom end frame, and the other end of the second single-pole 4-throw switch is on the second side frame And switching between the second corner frame, the metal formation or the second empty pin to operate the antenna in different frequency bands.
The antenna of claim 3, wherein the feed point is disposed at the bottom end frame.
The antenna according to claim 1, wherein the N-segment metal frame has a symmetrical structure.
The antenna according to claim 1, wherein said M single-pole multi-throw switches are disposed at symmetrical positions of said mobile terminal when said M is an even number.
The antenna of claim 1 wherein said metal formation is a magnesium aluminum alloy material.
A mobile terminal provided with the antenna according to any one of claims 1 to 7.