Intelligent terminal

Abstract

The invention provides an intelligent terminal which comprises a middle frame and an antenna assembly, the middle frame comprises a top edge part, a bottom edge part, a first side edge part and a second side edge part, and the first side edge part and the second side edge part are oppositely arranged and connected between the top edge part and the bottom edge part. Each of the first side edge part and the second side edge part comprises a first avoiding area close to the top edge part, a second avoiding area close to the bottom edge part and a mounting area located between the first avoiding area and the second avoiding area, and the mounting area is located between the first avoiding area and the second avoiding area in the length direction of the intelligent terminal. The length of the first avoiding area and the length of the second avoiding area are both larger than a preset value; the antenna assembly is arranged in at least one of the mounting area of the first side edge part and the mounting area of the second side edge part, and the antenna assembly comprises a low-frequency antenna. The technical problem that the communication performance of low-frequency signals is poor when a user holds the intelligent terminal in a horizontal screen mode due to the fact that the antenna position arrangement in the intelligent terminal is not reasonable enough is solved.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to an intelligent terminal. Background Art

[0002] In modern intelligent terminal devices, such as mobile phones, antenna design is a complex and crucial part because it directly affects the communication performance of intelligent terminals in various usage scenarios. Therefore, it is necessary to ensure good antenna performance for users in different usage scenarios (such as being idle, held in one hand, making a call, playing a game, etc.).

[0003] In some solutions, intelligent terminals are usually equipped with multiple antennas to support different frequency bands and communication standards to meet users' diverse communication needs. During the conception and implementation of this application, it is found that in some intelligent terminals, there are at least the following problems: the antenna position layout in the intelligent terminal is not reasonable enough, resulting in poor communication performance of low-frequency signals when the user holds the intelligent terminal horizontally, affecting the usage experience.

[0004] Therefore, how to improve the low-frequency signal performance in the scenario where the user holds the intelligent terminal horizontally is an urgent problem to be solved currently.

[0005] The foregoing description is to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0006] In view of the above technical problems, this application provides an intelligent terminal to solve the technical problem that the antenna position layout in the intelligent terminal is not reasonable enough, resulting in poor communication performance of low-frequency signals when the user holds the intelligent terminal horizontally.

[0007] This application provides an intelligent terminal, including:

[0008] A middle frame, the middle frame includes a top edge portion, a bottom edge portion, and a first side edge portion and a second side edge portion that are oppositely arranged and connected between the top edge portion and the bottom edge portion. The first side edge portion and the second side edge portion each include a first avoidance area close to the top edge portion, a second avoidance area close to the bottom edge portion, and an installation area located between the first avoidance area and the second avoidance area. Along the length direction of the intelligent terminal, the lengths of the first avoidance area and the second avoidance area are both greater than a preset value;

[0009] An antenna assembly, the antenna assembly is disposed in at least one of the installation areas of the first side edge portion and the installation area of the second side edge portion, and the antenna assembly includes a low-frequency antenna.

[0010] An intelligent terminal provided by the present application. Since both the first side portion and the second side portion include a first avoidance area, a second avoidance area, and an installation area located between the first avoidance area and the second avoidance area, considering that when the intelligent terminal is in a landscape application scenario, such as when playing games, the first avoidance area and the second avoidance area are easily blocked by the user's hands. By arranging the antenna assembly in the installation area, when the antenna assembly receives and radiates signals, it can well avoid the blocking effect of the user's hands, prevent the signal of the antenna from being affected by the user's hands, and improve the performance of the intelligent terminal in landscape application scenarios such as games. The antenna assembly includes a low-frequency antenna, so that when using the intelligent terminal in a landscape application scenario, it ensures that the low-frequency signal has good strength and stability to improve the user experience.

[0011] In a possible implementation manner, the antenna assembly further includes: a WIFI antenna and a medium-high frequency antenna. The WIFI antenna and the medium-high frequency antenna are formed in the installation area of the first side portion. The WIFI antenna and the medium-high frequency antenna are arranged along the length direction of the first side portion, and a first gap is formed therebetween.

[0012] In a possible implementation manner, a second gap is formed between one of the WIFI antenna and the medium-high frequency antenna and the first avoidance area of the first side portion, and a third gap is formed between the other of the WIFI antenna and the medium-high frequency antenna and the second avoidance area of the first side portion.

[0013] In a possible implementation manner, the WIFI antenna includes a first radiation branch. The first radiation branch is formed in the installation area of the first side portion, and one end of the first radiation branch is connected to a first feed source;

[0014] The operating frequency band of the WIFI antenna includes the WiFi 2.4G band and the WiFi 5G band.

[0015] In a possible implementation manner, the intelligent terminal further includes a WIFI adjustment circuit. The WIFI adjustment circuit includes a capacitor connected in series with the first feed source and the first radiation branch. The WIFI adjustment circuit is used to adjust the resonant frequency of the WIFI antenna so that the WIFI antenna realizes a working mode of 1 / 4 to 3 / 4 wavelength.

[0016] In a possible implementation manner, the medium-high frequency antenna includes a second radiation branch and a third radiation branch. The second radiation branch and the third radiation branch are both formed in the installation area of the first side portion. A fourth gap is formed between the second radiation branch and the third radiation branch, and the second radiation branch and the third radiation branch are coupled and connected through the fourth gap;

[0017] One of the second radiation stub and the third radiation stub is connected with a second feeder, one of the second radiation stub and the third radiation stub is connected with a tuning unit, and the ends of the second radiation stub and the third radiation stub far from the fourth slot are both grounded.

[0018] In a possible implementation manner, the low-frequency antenna is disposed in the installation area of the second side portion. The low-frequency antenna includes a fourth radiation stub, and the installation area of the second side portion constitutes the fourth radiation stub. One end of the fourth radiation stub is connected with a third feeder.

[0019] In a possible implementation manner, there is a fifth slot between the low-frequency antenna and the first avoidance area of the second side portion, and there is a sixth slot between the low-frequency antenna and the second avoidance area of the second side portion. The low-frequency antenna is used to support the transmission and / or reception of low-frequency signals.

[0020] In a possible implementation manner, the intelligent terminal further includes a low-frequency adjustment circuit. The low-frequency adjustment circuit includes a capacitor connected in series with the third feeder and the fourth radiation stub. The low-frequency adjustment circuit is used to adjust the resonant frequency of the low-frequency antenna so that the low-frequency antenna realizes a working mode of 1 / 4 to 1 / 2 wavelength.

[0021] In a possible implementation manner, along the length direction of the first side portion, the length L1 of the first avoidance area is: L1≥33mm;

[0022] The length L2 of the second avoidance area is: L2≥33mm.

[0023] The present application provides an intelligent terminal. The antenna assembly is disposed in at least one of the installation area of the first side portion and the installation area of the second side portion. In the landscape screen scenario, the WIFI antenna, the medium-high frequency antenna or the low-frequency antenna is not affected by being held by hand, which improves the overall communication performance of the intelligent terminal in the landscape screen scenario, such as the game scenario.

[0024] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by an intelligent terminal provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0025] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0026] Figure 1 Schematic structural diagram of the intelligent terminal provided for the embodiment of this application;

[0027] Figure 2 Another schematic structural diagram of the intelligent terminal provided for the embodiment of this application;

[0028] Figure 3 Schematic structural diagram of the intelligent terminal used in the landscape screen scenario provided for the embodiment of this application;

[0029] Figure 4 Schematic diagram of the return loss of the medium and high frequency antenna in the intelligent terminal provided for the embodiment of this application;

[0030] Figure 5 Schematic hardware structure diagram of the mobile terminal provided for the embodiment of this application.

[0031] Explanation of reference numerals:

[0032] 10 - Middle frame; 11 - Top edge part; 12 - Bottom edge part; 13 - First side edge part; 14 - Second side edge part; 15 - First avoidance area; 16 - Second avoidance area; 17 - Installation area; 18 - Accommodation cavity; 181 - First circuit board; 182 - Second circuit board;

[0033] 20 - Antenna assembly; 21 - WIFI antenna; 211 - First feeder; 212 - First radiation branch; 22 - Medium and high frequency antenna; 221 - Second feeder; 222 - Second radiation branch; 223 - Third radiation branch; 224 - Tuning unit; 225 - First grounding part; 23 - Low frequency antenna; 231 - Third feeder; 232 - Fourth radiation branch; 233 - Second grounding part; 24 - Main antenna;

[0034] 31 - First gap; 32 - Second gap; 33 - Third gap; 34 - Fourth gap; 35 - Fifth gap; 36 - Sixth gap;

[0035] 40 - First button;

[0036] 500 - Mobile terminal; 501 - Radio frequency unit; 502 - WiFi module; 503 - Audio output unit; 504 - A / V input unit; 5041 - Graphics processor; 5042 - Microphone; 505 - Sensor; 506 - Display unit; 5061 - Display panel; 507 - User input unit; 5071 - Touch panel; 5072 - Other input devices; 508 - Interface unit; 509 - Memory; 510 - Processor; 511 - Power supply.

[0037] The realization of the purpose of this application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Through the above-mentioned accompanying drawings, the specific embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0038] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, components, features, and elements with the same name in different embodiments of this application may have the same meaning or different meanings, and their specific meanings need to be determined based on their explanations in the specific embodiments or further in combination with the context of the specific embodiments.

[0040] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this document, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining". Furthermore, as used in this document, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the above-mentioned features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or", "and / or", "including at least one of the following" and the like used in this application may be interpreted inclusively, or mean any one or any combination. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C", and again, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C". An exception to this definition will occur only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0041] It should be understood that although the steps in the flowcharts in the embodiments of this application are shown sequentially according to the indication of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this document, the execution of these steps has no strict order limit and can be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and their execution order is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0042] Depending on the context, the words "if", "when" as used herein may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0043] It should be understood that the specific embodiments described herein are merely for explaining the present application and are not used to limit the present application.

[0044] In the following description, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of explaining the present application, and they have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0045] The intelligent terminal can be implemented in various forms. For example, the intelligent terminal described in the present application may include intelligent terminals such as mobile phones, tablet computers, laptop computers, palmtop computers, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0046] In modern wireless communication devices, supporting multi-band operation is very important to meet the requirements of different communication standards and applications. Among them, the WiFi antenna refers to a wireless signal (Wireless Fidelity, abbreviated as WIFI) antenna, which usually operates in the 2.4 GHz and 5 GHz frequency bands. The 2.4 GHz frequency band has better penetration ability and coverage, while the 5 GHz frequency band supports higher data transmission rates and less interference.

[0047] Low-frequency antennas are usually used for lower wireless frequency bands, such as 700 MHz, 800 MHz, 900 MHz, etc. These frequency bands are common in 2G, 3G, and 4G (Long Term Evolution, abbreviated as LTE) networks, especially in frequency bands such as B8 900 MHz. In some intelligent terminals, such as mobile phones, in the landscape screen usage scenario, such as in a game scenario, the performance of low-frequency signals is poor, affecting the usage effect.

[0048] In view of this, an intelligent terminal provided by the present application sets a first avoidance area, a second avoidance area, and an installation area located between the first avoidance area and the second avoidance area on both the first side portion and the second side portion. Considering that in the landscape screen application scenario of the intelligent terminal, such as when playing a game, the first avoidance area and the second avoidance area are easily blocked by the user's both hands. By arranging the antenna assembly in the installation area, when the antenna assembly receives and radiates signals, it can well avoid the blocking effect of the user's both hands, preventing the signal of the antenna from being affected by the user's both hands, and improving the performance of the intelligent terminal in landscape screen application scenarios such as games. The antenna assembly includes a low-frequency antenna, so that when using the intelligent terminal in the landscape screen application scenario, it ensures that the low-frequency signal has good strength and stability, thereby improving the user experience.

[0049] The following describes an intelligent terminal provided by an embodiment of the present application with reference to the accompanying drawings.

[0050] Refer to Figure 1 and Figure 2 As shown, the present application provides an intelligent terminal, including: a middle frame 10 and an antenna assembly 20. The middle frame 10 includes a top edge portion 11, a bottom edge portion 12, and a first side edge portion 13 and a second side edge portion 14 that are oppositely arranged and connected between the top edge portion 11 and the bottom edge portion 12. Both the first side edge portion 13 and the second side edge portion 14 include a first avoidance area 15 close to the top edge portion 11, a second avoidance area 16 close to the bottom edge portion 12, and an installation area 17 located between the first avoidance area 15 and the second avoidance area 16. Along the length direction of the intelligent terminal, the lengths of both the first avoidance area 15 and the second avoidance area 16 are greater than a preset value.

[0051] The antenna assembly 20 is disposed in at least one of the installation areas 17 of the first side edge portion 13 and the installation area 17 of the second side edge portion 14, and the antenna assembly 20 includes a low-frequency antenna 23.

[0052] For the intelligent terminal provided by the present application, since both the first side edge portion 13 and the second side edge portion 14 include a first avoidance area 15, a second avoidance area 16, and an installation area 17 located between the first avoidance area 15 and the second avoidance area 16, considering that in the landscape application scenario of the intelligent terminal, such as when playing games, the first avoidance area 15 and the second avoidance area 16 are easily blocked by the user's both hands. By disposing the antenna assembly 20 in the installation area 17, when the antenna assembly 20 receives and radiates signals, it can well avoid the blocking effect of the user's both hands, prevent the signals of the antenna from being affected by the user's both hands, and improve the performance of the intelligent terminal in landscape application scenarios such as games. The antenna assembly 20 includes a low-frequency antenna 23, so that when using the intelligent terminal in the landscape application scenario, it ensures that the low-frequency signal has good strength and stability to improve the user experience.

[0053] The present application provides an intelligent terminal, the middle frame 10 is rectangular, the top edge portion 11 and the bottom edge portion 12 are arranged in parallel, and the first side edge portion 13 and the second side edge portion 14 are arranged in parallel.

[0054] In a possible implementation manner, the antenna assembly 20 further includes: a WIFI antenna 21 and a medium-high frequency antenna 22. The WIFI antenna 21 and the medium-high frequency antenna 22 are formed in the installation area 17 of the first side edge portion 13. The WIFI antenna 21 and the medium-high frequency antenna 22 are arranged along the length direction of the first side edge portion 13, and a first gap 31 is formed therebetween. The length direction of the first side edge portion 13 refers to Figure 1 the direction indicated by the arrow Y in

[0055] The existence of the first gap 31 enables the WIFI antenna 21 and the medium-high frequency antenna 22 to be relatively independent of each other, and their respective antenna performances will not be affected by each other, which can effectively reduce electromagnetic interference between different frequency bands. For example, the WiFi antenna can focus on the performance of the 2.4GHz and 5GHz bands, while the medium-high frequency antenna 22 can be used for the frequency bands of the cellular network to support the frequency bands of 3G, 4G LTE, and 5G networks. Users can obtain a more stable WiFi connection and a more reliable cellular network connection when using the smart terminal, which can not only provide a larger coverage range but also support a higher data transmission rate, improving the usage experience.

[0056] The existence of the first gap 31 can also improve the electromagnetic environment around the WIFI antenna 21 and the medium-high frequency antenna 22, making the signal propagation smoother and increasing the signal strength and coverage range.

[0057] The medium-high frequency antenna 22 refers to an antenna operating in the medium-high band (MHB) range of 1.75GHz to 2.75GHz. The medium-high frequency antenna 22 is used to process intermediate frequency (usually in the range of 300MHz to 3GHz) and high frequency (usually in the range of 3GHz to 30GHz) signals in wireless communication.

[0058] In a possible implementation, a second gap 32 is formed between one of the WIFI antenna 21 and the medium-high frequency antenna 22 and the first avoidance area 15 of the first side portion 13, and a third gap 33 is formed between the other of the WIFI antenna 21 and the medium-high frequency antenna 22 and the second avoidance area 16 of the first side portion 13.

[0059] In a possible implementation, relative to the WIFI antenna 21, the medium-high frequency antenna 22 is closer to the second avoidance area 16; a second gap 32 is formed between the WIFI antenna 21 and the first avoidance area 15 of the first side portion 13; and a third gap 33 is formed between the medium-high frequency antenna 22 and the second avoidance area 16 of the first side portion 13.

[0060] Since metals or other conductive materials may have an adverse effect on the electromagnetic field of the antenna, resulting in signal attenuation or distortion, in this application, the second gap 32 serves to physically isolate the material of the WIFI antenna 21 from the first avoidance area 15, effectively preventing the first avoidance area 15 of the first side portion 13 from interfering with the WIFI antenna 21 and achieving a more stable and fast WIFI signal connection. The third gap 33 serves to physically isolate the material of the medium-high frequency antenna 22 from the second avoidance area 16, effectively preventing the second avoidance area 16 of the first side portion 13 from interfering with the medium-high frequency antenna 22 and ensuring the signal strength.

[0061] In a possible implementation not shown in another figure, the mid - high - frequency antenna 22 is farther from the second avoidance area 16 relative to the WIFI antenna 21; a second gap 32 is formed between the mid - high - frequency antenna 22 and the first avoidance area 15 of the first side portion 13; a third gap 33 is formed between the WIFI antenna 21 and the second avoidance area 16 of the first side portion 13.

[0062] In a possible implementation, the form of the WIFI antenna 21 is a long monopole antenna.

[0063] In a possible implementation, the WIFI antenna 21 includes a first radiation branch 212 formed in the installation area 17 of the first side portion 13, and one end of the first radiation branch 212 is connected to a first feed source 211. The function of the first feed source 211 is to provide radio - frequency signal input for the WIFI antenna 21. The position of the first feed source 211 is crucial for the performance of the WIFI antenna 21, affecting the impedance matching and radiation efficiency of the WIFI antenna 21, and thus affecting the signal strength and stability.

[0064] The first radiation branch 212 is used to effectively transmit and receive wireless signals. Formed in the installation area 17 of the first side portion 13, the first radiation branch 212 helps to optimize the space utilization of the smart terminal and the signal coverage of the WIFI antenna 21.

[0065] The operating frequency band of the WIFI antenna 21 includes the WiFi 2.4G band and the WiFi 5G band. This multi - band support enables the smart terminal to work under different WiFi standards, providing higher data transfer rates and broader compatibility. The 2.4GHz band is usually used for longer - distance communication, while the 5GHz band provides higher bandwidth and faster speed, suitable for high - density data transmission.

[0066] In a possible implementation, the length of the first radiation branch 212 is 27mm - 30mm. For example, the length of the first radiation branch 212 is 27mm, 28mm or 30mm.

[0067] In a possible implementation, the smart terminal further includes a WIFI adjustment circuit. The WIFI adjustment circuit includes a capacitor in series with the first feed source 211 and the first radiation branch 212. The WIFI adjustment circuit is used to adjust the resonant frequency of the WIFI antenna 21 so that the WIFI antenna 21 realizes a working mode of 1 / 4 - 3 / 4 wavelength. The WIFI adjustment circuit can compensate for the physical length deficiency of the first radiation branch 212 to enable it to work effectively at the target frequency. The function of the capacitor in the WIFI adjustment circuit is to adjust the electrical characteristics of the WIFI antenna 21 to help achieve better impedance matching and radiation efficiency.

[0068] The WiFi 2.4G band operates in a 1 / 4-wavelength mode, which is suitable for compact designs because the physical length of the antenna is shorter. The WiFi 5G band operates in a 3 / 4-wavelength mode to provide higher gain and better radiation efficiency, facilitating higher data rates and more stable communication.

[0069] In a possible implementation, the smart terminal further includes a first circuit board 181. The first feed source 211 can be disposed on the first circuit board 181, and the first feed source 211 is electrically connected to one end of the first radiation branch 212. For example, the first feed source 211 is electrically connected to the end of the first radiation branch 212 close to the second gap 32. The first feed source 211 can also be electrically connected to the end of the first radiation branch 212 far from the second gap 32 to input a feeding signal to the WIFI antenna 21.

[0070] One end of the first radiation branch 212 is provided with a first feeding point. The first feed source 211 is electrically connected to the first feeding point, and the first feed source 211 feeds current into the WIFI antenna 21 through the first feeding point. The first feeding point can be electrically connected to the first radiation branch 212 by means of a metal shrapnel or welding connection. The first feeding point feeds electricity to the first radiation branch 212 so that the signal is transmitted to the first radiation branch 212 and radiated outward through the first radiation branch 212.

[0071] In a possible implementation, the first circuit board 181 can be a circuit board inside the smart terminal.

[0072] In a possible implementation, the smart terminal further includes a first button 40. The first button 40 can be, for example, a power on / off button, and the position of the first button 40 can be corresponding to the position of the WIFI antenna 21.

[0073] In a possible implementation, the mid-high frequency antenna 22 includes a second radiation branch 222 and a third radiation branch 223. Both the second radiation branch 222 and the third radiation branch 223 are formed in the installation area 17 of the first side portion 13, which helps to optimize the space utilization and signal coverage of the mid-high frequency antenna 22.

[0074] In a possible implementation, a fourth gap 34 is formed between the second radiation branch 222 and the third radiation branch 223. The second radiation branch and the third radiation branch are coupled and connected through the fourth gap 34. Such a coupled connection realized through the fourth gap 34 allows energy exchange and interaction between the second radiation branch and the third radiation branch, which helps to enhance the bandwidth and radiation efficiency of the antenna.

[0075] The fourth gap 34 formed between the second radiation stub 222 and the third radiation stub 223 is equivalent to a series capacitor, making the medium and high frequency antenna 22 as a whole a coupled antenna. The size of the fourth gap 34 can be flexibly selected according to the usage requirements.

[0076] In a possible implementation manner, one of the second radiation stub 222 and the third radiation stub 223 is connected to a second feed source 221, one of the second radiation stub 222 and the third radiation stub 223 is connected to a tuning unit 224, and the ends of the second radiation stub 222 and the third radiation stub 223 away from the fourth gap 34 are both grounded. The grounding setting helps to stabilize the electrical characteristics of the medium and high frequency antenna 22, reduce unnecessary radiation losses and interference. The grounding can also provide a reference potential to help maintain the radiation pattern and efficiency of the antenna.

[0077] In a possible implementation manner, the intelligent terminal further includes a second circuit board 182. The second circuit board 182 can be located on the side of the first side portion 13 facing the second side portion 14. The second feed source 221 can be disposed on the second circuit board 182. The second feed source 221 can be electrically connected to one end of the second radiation stub 222 close to the fourth gap 34, or the second feed source 221 is electrically connected to one end of the third radiation stub 223 away from the fourth gap 34.

[0078] In a possible implementation manner, one end of the second radiation stub 222 close to the fourth gap 34 has a second feeding point. The second feed source 221 is electrically connected to the second feeding point, and the second feed source 221 feeds current into the medium and high frequency antenna 22 through the second feeding point. The end of the second radiation stub 222 away from the fourth gap 34 is grounded. Thus, one end of the second radiation stub 222 is fed with electricity and the other end is grounded, enabling normal radiation and communication. The second radiation stub 222 becomes the radiation stub of the intermediate frequency antenna, and the third radiation stub 223 becomes the radiation stub of the high frequency antenna. Such a structure allows for more precise impedance matching and higher radiation efficiency because each radiation stub can be adjusted according to its specific frequency requirements.

[0079] In a possible implementation manner, the second feeding point can be electrically connected to the second radiation stub 222 by means of a metal shrapnel or welding connection. The second feeding point feeds electricity to the second radiation stub 222 so that the signal is transmitted to the second radiation stub 222 and radiated outward through the second radiation stub 222.

[0080] In another possible implementation, one end of the third radiation stub 223 close to the fourth slot 34 has a third feeding point, the second feeder 221 is electrically connected to the third feeding point, the second feeder 221 feeds current into the medium-high frequency antenna 22 through the third feeding point, the third radiation stub 223 becomes the radiation stub of the intermediate frequency antenna, and the second radiation stub 222 becomes the radiation stub of the high frequency antenna.

[0081] In a possible implementation, the second radiation stub 222 is electrically connected to a first grounding portion 225, and the first grounding portion 225 is electrically connected to a grounding point on the second circuit board 182, so that the end of the second radiation stub 222 far from the fourth slot 34 is grounded.

[0082] In a possible implementation, the third radiation stub 223 is electrically connected to a second grounding portion 233, and the second grounding portion 233 is electrically connected to a grounding point on the second circuit board 182, so that the end of the third radiation stub 223 far from the fourth slot 34 is grounded.

[0083] In a possible implementation, the medium-high frequency antenna 22 further includes a tuning unit 224, the tuning unit 224 is electrically connected to the third radiation stub 223, and the tuning unit 224 is configured to adjust the frequency of the medium-high frequency antenna 22. Through tuning, the medium-high frequency antenna 22 can maintain better impedance matching and radiation efficiency under different operating conditions, can also optimize the radiation performance of the antenna, reduce reflection loss, and improve the strength and quality of the signal.

[0084] In a possible implementation, the second radiation stub 222 is connected to a second feeder 221, the length of the second radiation stub 222 is 18 mm to 20 mm, the length of the third radiation stub 223 is 12 mm to 14 mm, and the antenna can be effectively adjusted through the tuning unit 224 so that the radiation mode of the second radiation stub 222 is a low-frequency signal and the radiation mode of the third radiation stub 223 is a high-frequency signal.

[0085] In a possible implementation, the length of the second radiation stub 222 is 18 mm, 19 mm or 20 mm, and the length of the third radiation stub 223 is 12 mm, 13 mm or 14 mm.

[0086] In a possible implementation, there is a fifth slot 35 between the low-frequency antenna 23 and the first avoidance area 15 of the second side portion 14, and there is a sixth slot 36 between the low-frequency antenna 23 and the second avoidance area 16 of the second side portion 14. The low-frequency antenna 23 is used to support the transmission and / or reception of low-frequency signals.

[0087] The fifth slit 35 serves to physically isolate the low-frequency antenna 23 from the first avoidance area 15 of the second side portion 14, isolating the material in the first avoidance area 15 of the second side portion 14 from electromagnetic interference caused by the low-frequency antenna 23 and ensuring the performance of the low-frequency antenna 23.

[0088] The sixth slit 36 serves to physically isolate the low-frequency antenna 23 from the second avoidance area 16 of the second side portion 14, isolating the material in the first avoidance area 15 of the second side portion 14 from electromagnetic interference caused by the low-frequency antenna 23 and ensuring the performance of the low-frequency antenna 23.

[0089] In a possible implementation manner, the low-frequency antenna 23 is a long monopole antenna.

[0090] In a possible implementation manner, the low-frequency antenna 23 is disposed in the installation area 17 of the second side portion 14. The low-frequency antenna 23 includes a fourth radiation branch 232, and the installation area 17 of the second side portion 14 constitutes the fourth radiation branch 232. One end of the fourth radiation branch 232 is connected to a third feed source 231.

[0091] The low-frequency antenna 23 is disposed in the installation area 17 of the second side portion 14, which can optimize the size and shape of the low-frequency antenna 23, thereby improving its radiation efficiency and performance.

[0092] In a possible implementation manner, the length of the fourth radiation branch 232 is 80 mm to 90 mm. For example, the length of the fourth radiation branch 232 is 80 mm, 85 mm or 90 mm.

[0093] In a possible implementation manner, the intelligent terminal further includes a low-frequency adjustment circuit. The low-frequency adjustment circuit includes a capacitor connected in series with the third feed source 231 and the fourth radiation branch 232. The low-frequency adjustment circuit is used to adjust the resonant frequency of the low-frequency antenna 23 so that the low-frequency antenna 23 realizes a working mode of 1 / 4 to 1 / 2 wavelength. The capacitor in the low-frequency adjustment circuit can be used to adjust the resonant frequency of the low-frequency antenna 23. By changing the capacitance value, the electrical length of the low-frequency antenna 23 is changed, thereby adjusting the resonant frequency of the low-frequency antenna 23.

[0094] When the low-frequency antenna 23 realizes the 1 / 4 wavelength working mode, the physical length of the low-frequency antenna 23 is one-fourth of the working wavelength. The low-frequency adjustment circuit can help compensate for the shortage of the physical length of the low-frequency antenna 23, enabling the low-frequency antenna 23 to work effectively at the target frequency. When the low-frequency antenna 23 realizes the 1 / 2 wavelength working mode, the physical length of the low-frequency antenna 23 is half of the working wavelength. The low-frequency adjustment circuit can optimize the radiation efficiency and bandwidth of the low-frequency antenna 23.

[0095] In a possible implementation manner, along the length direction of the first side portion 13, the length L1 of the first avoidance area 15 is: L1 ≥ 33 mm; the length L2 of the second avoidance area 16 is: L2 ≥ 33 mm. This ensures that the positions of the installation areas 17 of both the first side portion 13 and the second side portion 14 can well avoid the positions where the user holds the device in the landscape mode, thereby reducing the influence of the user's hand holding the smart terminal on the antenna performance.

[0096] In a possible implementation manner, along the length direction of the first side portion 13, the length L1 of the first avoidance area 15 can be, for example, 33 mm, 34 mm, 35 mm, or 40 mm, etc., and the length L2 of the second avoidance area 16 can be, for example, 33 mm, 34 mm, 35 mm, or 40 mm, etc.

[0097] In a possible implementation manner, the middle frame 10 can be made of a metal material. The middle frame 10 can also be a frame structure formed by combining metal and plastic, with an accommodation cavity 18 enclosed inside. In the case where the middle frame 10 is a frame structure formed by combining metal and plastic, the metal part of the middle frame 10 can be used to set the radiation branches of the antenna, such as the first radiation branch section 212 for setting the WIFI antenna 21, the second radiation branch section 222 and the third radiation branch section 223 of the medium and high frequency antenna 22, and the fourth radiation branch section 232 of the low frequency antenna 23.

[0098] In a possible implementation manner, the smart terminal further includes a display screen, a main board, a battery, a battery cover, etc. The display screen, the middle frame, and the battery cover are sequentially covered and connected. The display screen and the main board can be carried on opposite sides of the middle frame.

[0099] In a possible implementation manner, the display screen is a flexible screen, that is, a flexible display screen, for displaying images. Exemplarily, the flexible screen can be an Organic Light-Emitting Diode (OLED) display screen, an Active-Matrix Organic Light-Emitting Diode (AMOLED) display screen, a Mini Organic Light-Emitting Diode display screen, a Micro Organic Light-Emitting Diode display screen, a Micro Organic Light-Emitting Diode display screen, a Quantum Dot Light Emitting Diodes (QLED) display screen.

[0100] The present application provides an intelligent terminal. To ensure the signal strength and signal stability of the intelligent terminal when used in the vertical screen scenario, the intelligent terminal further includes a main antenna 24. The main antenna 24 can be the first avoidance area 15 provided on the first side portion 13, and / or the second avoidance area 16 of the first side portion 13, and / or the first avoidance area 15 of the second side portion 14, and / or the second avoidance area 16 of the second side portion 14, and / or the top side portion 11, and / or the bottom side portion 12. The main antenna 24 can include multiple antennas, such as a main WIFI antenna, a main medium-high frequency antenna, and a main low-frequency antenna, which are respectively used to work when the intelligent terminal is in the vertical screen state, to replace the above-mentioned WIFI antenna 21, medium-high frequency antenna 22, or low-frequency antenna 23, so as to ensure the use effect of the intelligent terminal.

[0101] Reference Figure 3 As shown, the present application provides an intelligent terminal. The antenna assembly 20 is disposed in at least one of the installation areas 17 on the first side portion 13 and the installation areas 17 on the second side portion 14. In the horizontal screen scenario, the WIFI antenna 21, medium-high frequency antenna 22, or low-frequency antenna 23 is not affected by being held by hand, improving the overall communication performance of the intelligent terminal in the horizontal screen scenario, such as the game scenario.

[0102] The following are the performance of the game hand imitation and actual measurement. Figure 4 It is a schematic diagram of the return loss of the medium-high frequency antenna 22 of the intelligent terminal. The abscissa is the frequency, with the unit of GHz, and the ordinate is the return loss, with the unit of dB. Figure 4 In it, the solid line C is the return loss diagram of the intelligent terminal in free space, and the solid line D is the return loss diagram of the intelligent terminal in the horizontal screen hand-held scenario. The dotted line A is the working efficiency of the medium-high frequency antenna 22 in the horizontal screen hand-held scenario, and the dotted line B is the working efficiency of the medium-high frequency antenna 22 in free space. The position points 1 and 2 correspond to the intermediate frequency signals, and the maximum difference in their performance attenuation is less than 2 dB. The position points 3 and 4 correspond to the high-frequency signals, and the maximum difference in their performance attenuation is less than 2 dB, indicating that for an intelligent terminal provided by the present application, when used in the horizontal screen hand-held scenario, the performance of the medium-high frequency antenna 22 meets the requirements for wireless communication use.

[0103] In addition, the Total Radiated Power (TRP) is one of the important indicators of the antenna performance of wireless devices. TRP measures the total power radiated by the antenna in all directions in free space, reflecting the overall radiation efficiency of the antenna. By actually detecting the signals of the intelligent terminal in the horizontal screen hand-held scenario and in free space, calculating the attenuation of the signals, the detection results are shown in Table 1 below:

[0104] Table 1

[0105]

[0106] Among them, the B1 frequency band generally refers to the 2100 MHz frequency band, which is widely used in 3G and 4G LTE networks; the B3 frequency band generally refers to the 1800 MHz frequency band, which is also used in 3G and 4G LTE networks and is widely used in global LTE FDD networks; the B8 frequency band generally refers to the 900 MHz frequency band, which is widely used in 2G GSM networks and in some regions for 3G and 4G LTE networks; the B40 frequency band generally refers to the 2300 MHz frequency band, which is mainly used in TD-LTE networks; the B41 frequency band generally refers to the 2500 MHz frequency band, which is also used in TD-LTE networks to provide higher data transmission rates. WIFI2.4G refers to the 2.4 GHz frequency band, which is widely used in WiFi networks, and WIFI5G refers to the 5 GHz frequency band, which supports higher data transmission rates.

[0107] As can be seen from Table 1, the performance attenuation of the intermediate frequency bands B1 and B3 is within 2 dB; the performance attenuation of the low-frequency band B8 is within 2 dB, and for the high frequencies B40 and B41, their performance attenuation is within 2 dB, and the performance attenuation of WIFI 2.4G and WIFI5G is within 2 dB. Controlling the performance attenuation within 2 dB means that the smart terminal can maintain efficient signal transmission on each supported frequency band, ensuring the reliability of the smart terminal in various usage scenarios.

[0108] In the following description, a mobile terminal will be taken as an example for illustration. Those skilled in the art will understand that, except for components specifically for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminals.

[0109] Please refer to Figure 5 shown, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application. The mobile terminal 500 may include: an RF (Radio Frequency) unit 501, a WiFi module 502, an audio output unit 503, an A / V (audio / video) input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, a processor 510, and a power supply 511, etc. Those skilled in the art can understand that Figure 5 the mobile terminal structure shown in

[0110] does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 5 Next, each component of the mobile terminal will be specifically introduced:

[0111] The radio frequency unit 501 can be used for receiving and transmitting information or signals during a call. Optionally, after receiving the downlink information of the base station, it is sent to the processor 510 for processing. Additionally, the uplink data is sent to the base station. Generally, the radio frequency unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc. In addition, the radio frequency unit 501 can also communicate with the network and other devices via wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), and 5G, etc.

[0112] WiFi belongs to short-distance wireless transmission technology. The mobile terminal can help users send and receive emails, browse the web, and access streaming media, etc. through the WiFi module 502. It provides users with wireless broadband Internet access. Although Figure 5 the WiFi module 502 is shown, it can be understood that it is not an essential component of the mobile terminal and can be omitted entirely within the scope of not changing the essence of the application as needed.

[0113] The audio output unit 503 can convert the audio data received by the radio frequency unit 501 or the WiFi module 502 or stored in the memory 509 into an audio signal and output it as sound when the mobile terminal 500 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 503 can also provide an audio output related to the specific functions executed by the mobile terminal 500 (such as a call signal reception sound, a message reception sound, etc.). The audio output unit 503 can include a speaker, a buzzer, etc.

[0114] The A / V input unit 504 is used to receive audio or video signals. The A / V input unit 504 may include a Graphics Processing Unit (GPU) 5041 and a microphone 5042. The GPU 5041 processes the image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames can be displayed on the display unit 506. The image frames processed by the GPU 5041 can be stored in the memory 509 (or other storage media) or transmitted via the radio frequency unit 501 or the WiFi module 502. The microphone 5042 can receive sounds (audio data) via the microphone 5042 in operation modes such as a phone call mode, a recording mode, a voice recognition mode, etc., and can process such sounds into audio data. The processed audio (voice) data can be output in a format that can be transmitted to a mobile communication base station via the radio frequency unit 501 in the case of the phone call mode. The microphone 5042 can implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) the noise or interference generated during the reception and transmission of audio signals.

[0115] The mobile terminal 500 further includes at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 5061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 5061 and / or the backlight when the mobile terminal 500 is moved to the ear. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary, and can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as a pedometer, tapping), etc.; as for other sensors that the mobile phone can also be configured with, such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., they will not be elaborated here.

[0116] The display unit 506 is used to display the information input by the user or the information provided to the user. The display unit 506 may include a display panel 5061, and the display panel 5061 can be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), etc.

[0117] The user input unit 507 can be used to receive input numeric or character information and generate key signal inputs related to the user settings and function control of the mobile terminal. Optionally, the user input unit 507 may include a touch panel 5071 and other input devices 5072. The touch panel 5071, also known as a touch screen, can collect touch operations of the user thereon or nearby (such as operations of the user using a finger, a stylus, or any suitable object or accessory on or near the touch panel 5071), and drive corresponding connection devices according to a preset program. The touch panel 5071 can include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the touch orientation of the user, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 510, and can receive and execute commands sent by the processor 510. In addition, the touch panel 5071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 5071, the user input unit 507 may further include other input devices 5072. Optionally, the other input devices 5072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, etc., and specific details are not limited here.

[0118] Optionally, the touch panel 5071 may cover the display panel 5061. After the touch panel 5071 detects a touch operation thereon or nearby, it transmits the operation to the processor 510 to determine the type of the touch event. Subsequently, the processor 510 provides corresponding visual output on the display panel 5061 according to the type of the touch event. Although in Figure 5 the touch panel 5071 and the display panel 5061 are implemented as two independent components to realize the input and output functions of the mobile terminal, in some embodiments, the touch panel 5071 and the display panel 5061 can be integrated to realize the input and output functions of the mobile terminal, and specific details are not limited here.

[0119] The interface unit 508 serves as an interface through which at least one external device can be connected to the mobile terminal 500. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headset port, and so on. The interface unit 508 can be used to receive inputs from external devices (such as data information, power, etc.) and transmit the received inputs to one or at least one element within the mobile terminal 500 or can be used to transmit data between the mobile terminal 500 and external devices.

[0120] The memory 509 can be used to store software programs and various data. The memory 509 mainly includes a program storage area and a data storage area. Optionally, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory 509 can include high-speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0121] The processor 510 is the control center of the mobile terminal, connecting various parts of the entire mobile terminal through various interfaces and circuits. By running or executing software programs and / or modules stored in the memory 509, and calling data stored in the memory 509, it executes various functions of the mobile terminal and processes data, thereby monitoring the mobile terminal as a whole. The processor 510 can include one or at least one processing unit; preferably, the processor 510 can integrate an application processor and a modem processor. Optionally, the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 510.

[0122] The mobile terminal 500 can also include a power supply 511 (such as a battery) for powering each component. Preferably, the power supply 511 can be logically connected to the processor 510 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system.

[0123] Although Figure 5 not shown, the mobile terminal 500 can also include a Bluetooth module, etc., which will not be elaborated here.

[0124] The technical features of the technical solution of this application can be combined arbitrarily. For the sake of simplicity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered to be within the scope recorded in this application.

[0125] The above are only the preferred embodiments of this application, and do not limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of this application by the same token.

Claims

1. An intelligent terminal, characterized in that, Comprising: A middle frame (10), the middle frame (10) includes a top edge portion (11), a bottom edge portion (12), and a first side edge portion (13) and a second side edge portion (14) which are oppositely arranged and connected between the top edge portion (11) and the bottom edge portion (12). Both the first side edge portion (13) and the second side edge portion (14) include a first avoidance area (15) close to the top edge portion (11), a second avoidance area (16) close to the bottom edge portion (12), and an installation area (17) located between the first avoidance area (15) and the second avoidance area (16). Along the length direction of the intelligent terminal, the lengths of both the first avoidance area (15) and the second avoidance area (16) are greater than a preset value; An antenna assembly (20), the antenna assembly (20) is disposed in at least one of the installation areas (17) of the first side edge portion (13) and the installation areas (17) of the second side edge portion (14), and the antenna assembly (20) includes a low-frequency antenna (23).

2. The intelligent terminal according to claim 1, wherein The antenna assembly (20) further includes: a WIFI antenna (21) and a medium-high frequency antenna (22). The WIFI antenna (21) and the medium-high frequency antenna (22) are formed in the installation area (17) of the first side edge portion (13). The WIFI antenna (21) and the medium-high frequency antenna (22) are arranged along the length direction of the first side edge portion (13), and a first gap (31) is formed therebetween.

3. The intelligent terminal according to claim 2, characterized in that, A second gap (32) is formed between one of the WIFI antenna (21) and the medium-high frequency antenna (22) and the first avoidance area (15) of the first side edge portion (13), and a third gap (33) is formed between the other of the WIFI antenna (21) and the medium-high frequency antenna (22) and the second avoidance area (16) of the first side edge portion (13).

4. The smart terminal according to claim 2, wherein The WIFI antenna (21) includes a first radiation branch (212), the first radiation branch (212) is formed in the installation area (17) of the first side edge portion (13), and one end of the first radiation branch (212) is connected with a first feed source (211); The operating frequency band of the WIFI antenna (21) includes the WiFi 2.4G frequency band and the WiFi 5G frequency band.

5. The smart terminal according to claim 4, wherein It further includes a WIFI adjustment circuit. The WIFI adjustment circuit includes a capacitor connected in series with the first feed source (211) and the first radiation branch (212). The WIFI adjustment circuit is used to adjust the resonant frequency of the WIFI antenna (21) so that the WIFI antenna (21) realizes a working mode of 1 / 4 to 3 / 4 wavelength.

6. The intelligent terminal according to claim 2, wherein The medium and high frequency antenna (22) includes a second radiation branch (222) and a third radiation branch (223). Both the second radiation branch (222) and the third radiation branch (223) are formed in the installation area (17) of the first side portion (13). A fourth gap (34) is formed between the second radiation branch (222) and the third radiation branch (223). The second radiation branch and the third radiation branch are coupled and connected through the fourth gap (34). One of the second radiation branch (222) and the third radiation branch (223) is connected to a second feeder (221). One of the second radiation branch (222) and the third radiation branch (223) is connected to a tuning unit (224). The ends of the second radiation branch (222) and the third radiation branch (223) far from the fourth gap (34) are grounded.

7. The intelligent terminal according to any one of claims 1-6, characterized in that, The low frequency antenna (23) is disposed in the installation area (17) of the second side portion (14). The low frequency antenna (23) includes a fourth radiation branch (232). The installation area (17) of the second side portion (14) constitutes the fourth radiation branch (232). One end of the fourth radiation branch (232) is connected to a third feeder (231).

8. The intelligent terminal according to claim 7, characterized in that, There is a fifth gap (35) between the low frequency antenna (23) and the first avoidance area (15) of the second side portion (14). There is a sixth gap (36) between the low frequency antenna (23) and the second avoidance area (16) of the second side portion (14). The low frequency antenna (23) is used to support the transmission and / or reception of low frequency signals.

9. The intelligent terminal according to claim 7, wherein It further includes a low frequency adjustment circuit. The low frequency adjustment circuit includes a capacitor connected in series with the third feeder (231) and the fourth radiation branch (232). The low frequency adjustment circuit is used to adjust the resonant frequency of the low frequency antenna (23) so that the low frequency antenna (23) realizes a working mode of 1 / 4 to 1 / 2 wavelength.

10. The intelligent terminal according to any one of claims 1-6, characterized in that, Along the length direction of the first side portion (13), the length L1 of the first avoidance area (15) is: L1≥33mm; The length L2 of the second avoidance area (16) is: L2≥33mm.

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