CN108808212B

CN108808212B - Antenna system and mobile terminal

Info

Publication number: CN108808212B
Application number: CN201810605720.9A
Authority: CN
Inventors: 贾玉虎
Original assignee: Oppo Chongqing Intelligent Technology Co Ltd
Current assignee: Oppo Chongqing Intelligent Technology Co Ltd
Priority date: 2018-06-13
Filing date: 2018-06-13
Publication date: 2021-02-02
Anticipated expiration: 2038-06-13
Also published as: CN108808212A

Abstract

The present application relates to an antenna system and a mobile terminal having the same, the antenna system including: the conductive frame is provided with a polygonal structure and comprises a first side and a second side which are not parallel to each other. The isolation between any two adjacent antennas is larger than a set threshold, wherein at least one antenna is arranged on the first edge, and at least one antenna is arranged on the second edge. And the antenna control circuit is respectively connected with each antenna and used for detecting the signal intensity of each antenna and controlling any antenna to form a radio frequency link according to the signal intensity so as to enable the antenna to be in a receiving and transmitting state. According to the antenna system and the mobile terminal, the antennas are arranged on the two sides which are not parallel to each other, so that the situation that a plurality of antennas are shielded simultaneously is avoided, and the communication quality of the terminal is guaranteed.

Description

Antenna system and mobile terminal

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to an antenna system and a mobile terminal.

Background

An antenna system on a mobile terminal is used to implement wireless communication functions of the mobile terminal. If the antenna system is shielded or covered, the communication performance of the mobile terminal is greatly affected. Along with the expansion of the functions of the mobile terminal, the way of holding the mobile terminal by a user is more and more diversified, which causes the antenna to be easily covered, and further influences the communication performance.

In some usage scenarios, for example, when playing games or watching videos, a user often operates a mobile phone by holding the top end and the bottom end of the mobile terminal with both hands, so that antenna portions disposed at the top end and the bottom end of the mobile terminal are completely covered by the hands of the user, resulting in poor antenna signals and affecting user experience.

Disclosure of Invention

The embodiment of the application provides an antenna system and a mobile terminal, which can solve the problem that the communication performance is affected because an antenna is easily covered.

An antenna system, comprising:

the conductive frame is provided with a polygonal structure and comprises a first side and a second side which are not parallel to each other;

the isolation between any two adjacent antennas is larger than a set threshold, wherein at least one antenna is arranged on the first edge, and at least one antenna is arranged on the second edge;

and the antenna control circuit is respectively connected with each antenna and used for detecting the signal intensity of each antenna and controlling any antenna to form a radio frequency link according to the signal intensity so as to enable the antenna to be in a receiving and transmitting state.

A mobile terminal includes an antenna.

According to the antenna system and the mobile terminal, the antennas are arranged on the two sides which are not parallel to each other, so that the situation that a plurality of antennas are shielded simultaneously is avoided, and the communication quality of the terminal is guaranteed. For example, when the mobile terminal is in the landscape mode, the user usually holds the head and the tail of the mobile terminal with both hands, and although some antennas are shielded, other antennas are not shielded, the antenna signals can still be normally received and transmitted, thereby ensuring the communication quality of the mobile terminal.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of an antenna system in one embodiment;

fig. 2 is a circuit diagram of an antenna system in one embodiment;

FIG. 3 is a circuit diagram of an antenna system having at least four antennas in one embodiment;

fig. 4 is a circuit diagram of an embodiment of an antenna system with a ground terminal;

fig. 5 is a circuit diagram of an antenna system with a spreading circuit in one embodiment;

fig. 6 is a circuit connection diagram of an antenna system with a spreading circuit in one embodiment;

fig. 7 is a block diagram of a partial structure of a mobile phone 900 related to a mobile terminal according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first edge can be referred to as a second edge, and similarly, a second edge can be referred to as a first edge, without departing from the scope of the present application. Both the first edge and the second edge are edges on the conductive bezel, but they are not the same edge.

Fig. 1 is a schematic diagram of an antenna system in one embodiment. As shown in fig. 1, an antenna system according to the present embodiment includes:

the conductive bezel 120 has a polygonal structure, and the conductive bezel 120 includes a first side 122 and a second side 124 that are not parallel to each other.

And at least two antennas (142, 144), wherein the distance between any two adjacent antennas is larger than a set threshold, at least one antenna 142 is arranged on the first edge 122, and at least one antenna 144 is arranged on the second edge 124.

And an antenna control circuit 160, connected to each antenna (e.g., the antennas 142 and 144), for detecting the signal strength of each antenna, and controlling any antenna to form a radio frequency link according to the signal strength, so that the antenna is in a transceiving state.

The conductive frame 120 has a polygonal structure, wherein the shape of the conductive frame 120 generally changes with the shape of the mobile terminal 100, and the conductive frame 120 may be a square frame (e.g., a metal frame on a smart watch), a hexagonal frame, or other polygonal structures besides a rectangular frame. On the other hand, the material of the conductive bezel 120 may include a material having a conductive function, such as metal, conductive plastic, conductive rubber, and conductive ceramic.

The number of antennas is not limited. For example, the number of antennas may be two, i.e., the antenna 142 and the antenna 144, respectively, and the antenna 142 and the antenna 144 represent antennas disposed on two sides that are not parallel to each other, respectively. It is understood that a plurality of antennas 142 may be disposed on the first side 122, and only a serious interference between the plurality of antennas 142 is required. Similarly, a plurality of antennas 142 may be disposed on the second side 124.

The isolation between the antennas is: the ratio of the signal transmitted by one antenna to the signal received by the other antenna to the transmitted antenna signal. The greater the isolation between the antennas, the lower the degree of mutual interference between the antennas. The size of the set threshold can be selected according to actual conditions. The isolation between the

antennas

142 and 144 is greater than the set threshold, which may be that the isolation between the

antennas

142 and 144 is greater than the set threshold in the full frequency band. For example, if the threshold is set to-10 dB, the isolation between the antenna 142 and the antenna 144 in the low and middle frequency bands can reach more than-10 dB. On the other hand, the isolation between the antenna 142 and the antenna 144 is greater than the set threshold, and the isolation between the antenna 142 and the antenna 144 in the specific frequency band may also be greater than the set threshold. For example, if the threshold value is set to be-22 dB, the isolation between the antenna 142 and the antenna 144 in the high band, the low band, or the 3.1 GHz to 5 GHz band reaches-22 dB.

The antenna 142 is disposed on the first side 122, that is, a feeding point in the antenna 142 is electrically connected to the first side 122, and the first side 122 made of a conductive material constitutes a part of a radiation portion of the antenna 142. Similarly, the antenna 144 is disposed on the second side 124, that is, the feeding point in the antenna 144 is electrically connected to the second side 124, and the second side 124 made of conductive material forms a part of the radiation portion of the antenna 144.

Antennas

142 and 144 may each comprise at least one of a loop antenna, an inverted-F antenna, a strip antenna, a planar inverted-F antenna, or a micro-slot antenna. On the other hand, the

antennas

142 and 144 include at least one of a wifi antenna, a mobile cellular antenna, a GPS antenna, a bluetooth antenna, and an NFC antenna.

It should be noted that the antenna system in this embodiment may be configured on a mobile terminal, and the back plate of the mobile terminal may be made of plastic, glass, ceramic, metal, or a combination of the above materials. If the mobile terminal uses a metal backplane, the metal material in the clearance areas of the

antennas

142 and 144 may be replaced with other dielectric materials such as plastic and glass in consideration of the signal shielding problem of the metal backplane. The metal material in the clearance areas of the

antennas

142 and 144 may be separated from other metal materials on the backplane, for example, a gap may be formed between the metal materials, and a dielectric material may be injected into the gap to prevent electrical connection between the metal materials and thus prevent the metal backplane from shielding the antenna signal.

The antenna control circuit 160 may be a part of a radio frequency chip in an antenna system, and a radio frequency module is generally disposed in the antenna system, and a specific circuit structure is configured in the radio frequency module to detect the signal strength of each antenna and control the on/off of a radio frequency link of the antenna according to the signal strength. The radio frequency modules produced by different manufacturers are different, and the circuit structures for detecting the strength of the antenna and controlling the on-off of the radio frequency link in the radio frequency modules are also different. The circuit configuration is not particularly limited in this embodiment. The rf chip with the antenna control circuit 160 includes, but is not limited to, cellcept X505G NR chip (5G commercial chip), QCA61 6164A (WIFI chip), WTR3925 (2G, 3G, and 4G chips).

The antenna system in the embodiment has the advantages that the antennas are arranged on the two sides which are not parallel to each other, so that the situation that a plurality of antennas are shielded simultaneously is avoided, and the communication quality of the terminal is guaranteed. For example, when the mobile terminal (mobile phone) is in the landscape mode, the user usually holds the head and the tail of the mobile terminal with both hands, and at this time, although the signal of the antenna 144 is shielded, the antenna 142 is not shielded, and the antenna signal can still be normally received and transmitted, thereby ensuring the communication quality of the mobile terminal.

Fig. 2 is a circuit diagram of an antenna system in one embodiment. As shown in fig. 2, the antenna control circuit 160 includes:

and a detection circuit 162 connected to each antenna (142, 144) for detecting the signal strength of each antenna.

And the control circuit 164 is connected to the detection circuit 162, and is configured to receive the detection result of the detection circuit 162 and output a switching signal.

And a switch 166 connected to the control circuit 164 and each of the antennas (142, 144), respectively, for receiving the switching signal, and connecting to any one of the antennas according to the switching signal to form a radio frequency link, so that the antenna is in a transceiving state.

The detection circuit 162 may be provided with a voltage or current detection element, such as a hall sensor, a voltage detection chip, or the like. Because the antenna 142 and the antenna 144 can convert the received antenna signal into an electrical signal, the strength of each electrical signal is detected by the detection circuit, and the purpose of detecting the strength of the antenna signal can be achieved.

A comparator and a logic control device may be disposed in the control circuit 162 to output corresponding switching signals according to different detection results. For example, the control circuit 164 may receive the electrical signal generated by the detection circuit 162 (as a detection result, the electrical signal may represent the strength of the antenna signal), and through cooperation of the comparator and the logic device, when the magnitude of the current or voltage of the electrical signal is too low, the control circuit 162 outputs a high level (or a low level); when the magnitude of the current or voltage of the electrical signal is normal, the control circuit 162 outputs a low level (or a high level). The high-low level signal can be used as a switching signal.

The switches 166 include, but are not limited to, DPDT switch, 3P3T switch, 4P4T switch. The change-over switch can flexibly change the relative positions of the movable contact and the fixed contact of the switch according to the received change-over signal. For example, the switch 166 is a DPDT switch having a pair of movable contacts and two pairs of stationary contacts, a first pair of stationary contacts connected to the antenna 142 and a second pair of stationary contacts connected to the antenna 144. If a high level signal is received, the movable contact in the DPDT switch contacts the first pair of stationary contacts, and at this time, the antenna 142 may be in a transceiving state, and the antenna 144 is not in a transceiving state. If a low level signal is received, the movable contact in the DPDT switch is turned to contact the second pair of stationary contacts, and the antenna 144 is in a transceiving state (i.e., capable of transmitting or receiving electromagnetic waves) and the antenna 142 is not in a transceiving state (i.e., incapable of transmitting or receiving electromagnetic waves).

The antenna system in this embodiment realizes the function of controlling the receiving and transmitting states of the antenna according to the signal strength of each antenna by the circuit composed of the detection circuit 162, the control circuit 164 and the switch 166, and the adopted circuit components are simple and easy to implement.

Fig. 3 is a circuit diagram of an antenna system having at least four antennas in one embodiment. As shown in fig. 3, the conductive bezel 120 further includes a third side 126 parallel to the first side 122, and a fourth side 128 parallel to the second side 124, wherein at least one antenna 146 is disposed on the third side 126 and at least one antenna 148 is disposed on the fourth side 128.

Wherein the antenna 146 is arranged on the third side 126, i.e. the feeding point inside the antenna 146 is electrically connected to the third side 126, and the third side 126, which is made of a conductive material, constitutes a part of the radiating portion of the antenna 146. Similarly, the antenna 148 is disposed on the fourth side 128, that is, the feeding point in the antenna 148 is electrically connected to the fourth side 128, and the fourth side 128 made of a conductive material constitutes a part of the radiation portion of the antenna 148. Antenna 146 and antenna 148 may each include at least one of a loop antenna, an inverted-F antenna, a strip antenna, a planar inverted-F antenna, or a micro-slot antenna. On the other hand,

antennas

146 and 148 may each include at least one of a wifi antenna, a mobile cellular antenna, a GPS antenna, a bluetooth antenna, and an NFC antenna.

The number of antennas 146 is not limited, and a plurality of antennas 146 may be disposed on the third side 126, so long as severe interference between the plurality of antennas 146 is avoided. Similarly, a plurality of antennas 148 may be disposed on the fourth side 128. Moreover, the isolation among the antenna 142, the antenna 144, the antenna 146, and the antenna 148 is required to be greater than a predetermined threshold.

The antenna system in this embodiment further increases the setting position of the antenna, and the antennas are respectively arranged on four edges of the conductive frame 120, so that the multiple antennas are further prevented from being shielded simultaneously, and the communication quality of the antenna system is ensured.

Referring back to fig. 1, in one embodiment, a MIMO chip (not shown) is also included, connected to each

antenna

142, 144, for providing multiple-input multiple-output (MIMO) channels for the antennas.

The MIMO (Multiple-Input Multiple-Output) technology is to use Multiple transmitting antennas and Multiple receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the Multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. The multi-antenna multi-transmission multi-reception mobile communication system can fully utilize space resources, realizes multi-transmission and multi-reception through a plurality of antennas, can improve the system channel capacity by times under the condition of not increasing frequency spectrum resources and antenna transmitting power, shows obvious advantages, and is regarded as the core technology of next generation mobile communication.

The MIMO technology may specifically be 2 × 2MIMO technology, and then both the antenna 142 and the antenna 144 may transmit and receive electromagnetic wave signals. At this time, the rf chip may provide two uplink signal paths and two downlink signal paths for the antenna 142 and the antenna 144 to ensure the implementation of the 2 × 2MIMO technology.

The MIMO technology may also be 4 x 4MIMO technology, and referring back to fig. 3, the antenna 142, the antenna 144, the antenna 146, and the antenna 148 may all transmit and receive electromagnetic wave signals. At this time, the rf chip may provide 4 uplink signal paths and four downlink signal paths for the antenna 144, the antenna 146, and the antenna 148, so as to ensure that the four antennas can transmit and receive signals simultaneously.

In the antenna system in this embodiment, the MIMO channel is provided for at least two antennas, so that the system channel capacity is improved by multiple times without increasing the spectrum resources and the antenna transmission power.

In one embodiment, the antenna further includes a ground terminal connected to the conductive frame, a connection point formed by the connection of the ground terminal and the conductive frame is a first connection point, the connection point formed by the connection of the feed point of each antenna and the conductive frame is a second connection point, and the first connection point is located between any two adjacent second connection points. As shown in fig. 4, the ground terminal 420 is connected to the conductive frame 120, a connection point formed by the connection of the ground terminal 420 and the conductive frame 120 is a first connection point 442, a connection point formed by the connection of the feed point 440 of the antenna 142 and the conductive frame 120 is a second connection point 444, a connection point formed by the connection of the feed point 460 of the antenna 144 and the conductive frame 120 is a second connection point 464, and the first connection point 442 is located between the second connection point 444 and the second connection point 464.

The number of the antennas is not limited, and other antennas may be included besides the

antennas

142 and 144, and the other antennas are disposed on any one edge of the conductive frame. The feed point of the antenna can be used for current signals transmitted by the radio frequency chip, and then the current signals are converted into electromagnetic wave signals by the antenna to be transmitted. The feed point of the antenna can also be used for transmitting an electrical signal converted from an electromagnetic wave signal to the radio frequency chip.

It should be noted that, as the number of antennas increases, although it is possible to avoid shielding multiple antennas at the same time, the decrease in the distance between the antennas will result in increasingly poor isolation. Considering that the isolation between the antennas needs to be greater than the set first threshold, this will result in a limitation in the increase in the number of antennas. The antenna system in this embodiment achieves the effect of reducing the isolation between the antennas by setting the ground terminal between each antenna, so that more antennas can be set on the conductive frame 120, thereby preventing the antennas from being shielded simultaneously and ensuring the communication quality of the antenna system.

Fig. 5 is a circuit diagram of an antenna system with a spreading circuit in one embodiment. As shown in fig. 5, the antenna system further includes a spreading circuit 520, one end of the spreading circuit 520 is connected to the first contact 442, the other end of the spreading circuit 520 is connected to the ground 420, and the spreading circuit 520 is configured to extend the resonant frequency band of the antenna (142, 144) by adjusting the capacitance parameter and the inductance parameter of the spreading circuit.

The spread spectrum circuit 520 may include various capacitors, inductors, etc., and the parameters of the capacitors or inductors of the spread spectrum circuit 520 may be adjusted by changing the capacitance and/or inductance values and by changing the connection manner of the capacitors and/or inductors in the circuit. Since the frequency spreading circuit 520 is located on both the first conductive loop formed by the feed point 440, the contact 444, the contact 442 and the ground terminal 420 and the second conductive loop formed by the feed point 460, the contact 464, the contact 442 and the ground terminal 420, LC oscillation characteristics of the first conductive loop and the second conductive loop can be changed simultaneously by changing capacitance or inductance parameters of the frequency spreading module, thereby expanding the resonant frequency bands of the antenna 142 and the antenna 144.

It should be noted that, because the ground terminal 420 is added between the antenna 142 and the antenna 144, it is difficult to adjust the resonant frequency band of the antenna to a low frequency band by only adjusting the capacitance and inductance characteristics inside the antenna 142 and the antenna 144. In the antenna of this embodiment, the spreading circuit 520 is disposed between the ground terminal 420 and the contact 442, so that the resonant frequency band of the antenna is advantageously extended to a low frequency band, and the low frequency bandwidth of the antenna is ensured. The low band bandwidth may range from 800MHz to 960 MHz.

Fig. 6 is a circuit diagram of an antenna system with a spreading circuit in one embodiment. As shown in fig. 6, the spread spectrum circuit 520 includes a spread spectrum switch 522, and a capacitor C1 connected to the spread spectrum switch 522, wherein the capacitor C1 is controlled by the spread spectrum switch 522 to be connected between the first node 442 and the ground terminal 420, so as to adjust the capacitance parameter of the spread spectrum circuit 520.

In one embodiment, the spectrum spreading circuit 520 includes a spectrum spreading switch 522, and an inductor L1 connected to the spectrum spreading switch 522, and the inductor L1 is controlled by the spectrum spreading switch to be connected between the first node 442 and the ground terminal 420, so as to adjust an inductance parameter of the spectrum spreading circuit 520.

In one embodiment, the capacitor includes a capacitor C1 and a capacitor C2, and the inductor includes an inductor L1 and an inductor L2. The illustrated switch 522 includes a single pole, four throw switch 522 that may be switched by a logic control or voltage current signal. The capacitor C1, the capacitor C2, the inductor L1, and the inductor L2 correspond to four paths in the single-pole four-throw switch 522, respectively, and any one of the capacitor C1, the capacitor C2, the inductor L1, and the inductor L2 can be selectively connected to the spread spectrum circuit 520 by switching the single-pole four-throw switch 222, so as to adjust the parameters of the capacitor and the inductor of the spread spectrum circuit 520. The number of the first capacitors may be multiple, and the number of the first inductors may also be multiple. With the change of the capacitance and inductance, the switch 522 can be replaced by a single-pole multi-throw switch such as a single-pole three-throw switch or a single-pole four-throw switch.

The antenna in this embodiment is matched with the capacitor and the inductor by the switch 522, so that the parameters of the capacitor and the inductor of the spread spectrum circuit 520 are adjusted in a simple and reliable manner, and the resonant frequency bands of the antenna 142 and the antenna 144 are further expanded.

Fig. 7 is a block diagram of a partial structure of a mobile phone 900 related to a mobile terminal according to an embodiment of the present invention. Referring to fig. 7, a handset 900 includes: antenna system 910, memory 920, input unit 930, display unit 940, sensor 950, audio circuitry 960, wireless fidelity (WIFI) module 970, processor 980, and power supply 990. Those skilled in the art will appreciate that the handset configuration shown in fig. 7 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The antenna system 910 may be used for receiving and transmitting information or receiving and transmitting signals during a call, and may receive downlink information of a base station and then process the received downlink information to the processor 980. The uplink data may also be transmitted to the base station. The memory 920 may be used to store software programs and modules, and the processor 980 may execute various functional applications and data processing of the mobile phone by operating the software programs and modules stored in the memory 920. The memory 920 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as an application program for a sound playing function, an application program for an image playing function, and the like), and the like. The data storage area may store data (such as audio data, an address book, etc.) created according to the use of the mobile phone, and the like. Further, the memory 920 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 930 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone 900. In one embodiment, the input unit 930 may include a touch panel 931 and other input devices 932. The touch panel 931, which may also be referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 931 (e.g., a user operating the touch panel 931 or near the touch panel 931 by using a finger, a stylus, or any other suitable object or accessory), and drive the corresponding connection device according to a preset program. In one embodiment, the touch panel 931 may include two parts of a touch measurement device and a touch controller. The touch measuring device measures the touch direction of a user, measures signals brought by touch operation and transmits the signals to the touch controller. The touch controller receives touch information from the touch measurement device, converts it to touch point coordinates, sends it to the processor 980, and can receive and execute commands from the processor 980. In addition, the touch panel 931 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 930 may include other input devices 932 in addition to the touch panel 931. In one embodiment, other input devices 932 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), and the like.

The display unit 940 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 940 may include a display panel 941. In one embodiment, the Display panel 941 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. In one embodiment, the touch panel 931 may overlay the display panel 941, and when the touch panel 931 measures a touch operation on or near the touch panel 931, the touch operation is transmitted to the processor 980 to determine the type of touch event, and then the processor 980 provides a corresponding visual output on the display panel 941 according to the type of touch event. Although in fig. 7, the touch panel 931 and the display panel 941 are two independent components to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 931 and the display panel 941 may be integrated to implement the input and output functions of the mobile phone.

Cell phone 900 may also include at least one sensor 950, such as a light sensor, motion sensor, and other sensors. In one embodiment, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 941 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 941 and/or backlight when the mobile phone is moved to the ear. The motion sensor can comprise an acceleration sensor, the acceleration sensor can measure the magnitude of acceleration in each direction, the magnitude and the direction of gravity can be measured when the mobile phone is static, and the motion sensor can be used for identifying the application of the gesture of the mobile phone (such as horizontal and vertical screen switching), vibration identification related functions (such as pedometer and knocking) and the like. The mobile phone may be provided with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor.

Audio circuitry 960, speaker 961 and microphone 962 may provide an audio interface between a user and a cell phone. The audio circuit 960 may transmit the electrical signal converted from the received audio data to the speaker 961, and convert the electrical signal into an audio signal for output by the speaker 961. On the other hand, the microphone 962 converts the collected sound signal into an electrical signal, converts the electrical signal into audio data after being received by the audio circuit 960, and then outputs the audio data to the processor 980 for processing, and then the audio data can be transmitted to another mobile phone through the RF circuit 910, or the audio data can be output to the memory 920 for subsequent processing.

WIFI belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send electronic mails, browse webpages, access streaming media and the like through the WIFI module 970, and provides wireless broadband internet access for the user. Although fig. 7 shows WIFI module 970, it can be understood that the antenna system includes a radiation segment in the WIFI frequency band, that is, the second radiation segment can implement signal transceiving in the WIFI frequency band, so that WIFI module 970 does not belong to an essential component of mobile phone 900, and can be omitted as needed.

The processor 980 is a control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 920 and calling data stored in the memory 920, thereby integrally monitoring the mobile phone. In one embodiment, processor 980 may include one or more processing units. In one embodiment, the processor 980 may integrate an application processor and a modem processor, wherein the application processor primarily handles operating systems, user interfaces, applications, and the like; the modem processor handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 980.

The handset 900 also includes a power supply 990 (e.g., a battery) for supplying power to various components, which may preferably be logically connected to the processor 980 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.

In one embodiment, the cell phone 900 may also include a camera, a bluetooth module, and the like.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An antenna system, comprising:

the conductive frame comprises a first side, a second side, a third side and a fourth side, wherein the first side and the second side are not parallel to each other, the third side is parallel to the first side, and the fourth side is parallel to the second side;

at least four antennas, wherein the isolation between any two adjacent antennas is greater than a set threshold, the isolation is a ratio of a signal received by another antenna when one antenna transmits an antenna signal to the antenna signal, at least one of the antennas is disposed on the first edge, at least one of the antennas is disposed on the second edge, at least one of the antennas is disposed on the third edge, at least one of the antennas is disposed on the fourth edge, and the first edge, the second edge, the third edge and the fourth edge of the conductive frame form a part of each of the antenna radiation portions;

the antenna control circuit is respectively connected with each antenna and used for detecting the signal intensity of each antenna and controlling any one antenna to form a radio frequency link according to the signal intensity so as to enable the antenna to be in a transceiving state;

a MIMO chip connected to each of the antennas for providing a multiple-input multiple-output (MIMO) channel for the antennas.

2. The antenna system of claim 1, wherein the antenna control circuit comprises:

the detection circuit is respectively connected with each antenna and used for detecting the signal intensity of each antenna;

the control circuit is connected with the detection circuit and used for receiving the detection result of the detection circuit and outputting a switching signal;

and the change-over switch is respectively connected with the control circuit and each antenna and used for receiving the switching signal and connecting with any antenna according to the switching signal to form a radio frequency link so as to enable the antenna to be in a receiving and transmitting state.

3. The antenna system of claim 1, wherein the antenna comprises at least one of a wifi antenna, a mobile cellular antenna, a GPS antenna, a bluetooth antenna, an NFC antenna.

4. The antenna system of claim 1, further comprising a ground terminal connected to the conductive frame, wherein a connection point formed by the connection of the ground terminal to the conductive frame is a first connection point, and each connection point formed by the connection of the antenna feed point to the conductive frame is a second connection point, and the first connection point is located between any two adjacent second connection points.

5. The antenna system of claim 4, further comprising a spread spectrum circuit, one end of the spread spectrum circuit being connected to the first contact, the other end of the spread spectrum circuit being connected to the ground, the spread spectrum circuit being configured to expand a resonant frequency band of the antenna by adjusting a capacitance parameter and an inductance parameter of the spread spectrum circuit.

6. The antenna system of claim 5, wherein the spreading circuit comprises a spreading switch and a capacitor connected to the spreading switch; and the capacitor is controlled to be connected between the first contact and the ground terminal through the spread spectrum switch so as to adjust the capacitance parameter of the spread spectrum circuit.

7. The antenna system of claim 5, wherein the spread spectrum circuit comprises a spread spectrum switch, and an inductor connected to the spread spectrum switch, wherein the inductor is controlled by the spread spectrum switch to be connected between the first connection point and a ground terminal so as to adjust an inductance parameter of the spread spectrum circuit.

8. A mobile terminal, characterized in that it comprises an antenna system according to any of claims 1 to 7.