Antenna and intelligent terminal

Abstract

The invention provides an antenna and an intelligent terminal, and the antenna comprises a substrate which is made of a high dielectric constant material and is provided with parallel double lines; the antenna comprises two kinds of radiation dipoles, the number of the radiation dipoles is 2N, N is a natural number, each radiation dipole comprises a left radiation arm and a right radiation arm, and a winding part is arranged between the left radiation arm and the right radiation arm; the feeding point is arranged at the central position of the substrate and is positioned on the parallel double lines; the parallel double lines are provided with K output ports, K = 2N + 1, and the radiation dipoles are correspondingly and electrically connected to the output ports. According to the dual-frequency omnidirectional antenna, the technical problem that the omnidirectional radiation of 2.4 GHz and 5.5 GHz dual-frequency work is difficult to realize under the condition that the size of the cross section of the existing dual-frequency omnidirectional antenna is limited is solved.

Description

Technical Field

[0001] The present application relates to the technical field of wireless communication equipment, and in particular to an antenna and a smart terminal. Background Art

[0002] With the rapid development of mobile communication technology and the continuous upgrading of mobile communication networks, wireless transmission technology has been widely used in different fields. Wireless fidelity (Wi-Fi for short) has become the most widely used wireless transmission technology due to its high-speed transmission and convenient use.

[0003] Current smart terminals generally support the sixth-generation wireless network technology standard, namely the Wi-Fi 6 standard, which operates in two frequency bands: 2.4GHz and 5.5GHz. For most smart terminals, antennas need to have 360° omnidirectional radiation characteristics in the horizontal direction to ensure the stability of device transmission. In order to meet the needs of existing smart terminals for antenna multi-band operation and omnidirectional radiation capabilities, antenna design is crucial. However, current omnidirectional antennas have the following problems: single-frequency operation and large cross-sectional size, which limits the application of omnidirectional antennas in smart terminals.

[0004] Therefore, it is urgent to solve the problem that the dual-frequency omnidirectional antenna in the prior art is difficult to achieve omnidirectional radiation characteristics of dual-frequency operation at 2.4 GHz and 5.5 GHz when the cross-sectional size is limited.

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

[0006] In response to the above technical problems, the present application provides an antenna and a smart terminal to solve the problem that the current dual-band omnidirectional antenna is difficult to achieve omnidirectional radiation at 2.4 GHz and 5.5 GHz dual frequencies due to limited cross-sectional size.

[0007] In order to solve the above technical problems, the present application provides an antenna, comprising:

[0008] A substrate, wherein the substrate is made of a high dielectric constant material and is provided with parallel double lines;

[0009] Two radiating dipoles, the number of each radiating dipole is 2 N wherein N is a natural number, and each of the radiating dipoles comprises a left radiating arm and a right radiating arm, and a meandering portion is provided between the left radiating arm and the right radiating arm;

[0010] A feeding point, the feeding point is arranged at the center of the substrate and is located on the parallel double lines;

[0011] The parallel two-wire has K output ports, where K=2 N+1 , the radiating dipole is electrically connected to the output port.

[0012] The present invention provides an antenna, wherein a parallel double line is arranged on a substrate, and the parallel double line has K output ports, wherein K=2 N+1 , the radiating dipoles are electrically connected to the output ports to achieve equal amplitude and in-phase signal output; the radiating dipoles include a left radiating arm and a right radiating arm, through which the antenna satisfies the low-frequency signal radiation of 2.4GHz, and a winding portion is provided between the left radiating arm and the right radiating arm to achieve high-frequency impedance matching, so that the antenna satisfies the high-frequency omnidirectional radiation mode of 5.5GHz, and does not affect the performance of the low-frequency omnidirectional radiation mode, thereby achieving dual-frequency omnidirectional radiation, meeting the omnidirectional uniform radiation effect, and making the antenna have good directivity and gain characteristics. Since the substrate is made of high dielectric constant material, it helps to reduce the cross-sectional size of the antenna and improve its performance, and realize the miniaturization of the antenna, thereby solving the problem that the antenna in the prior art cannot provide dual-band omnidirectional radiation under space conditions with limited cross-sectional size.

[0013] In a possible implementation, the parallel double lines are rotationally symmetric with the center point of the substrate as the symmetry center, the substrate has a first surface and a second surface, the parallel double lines include an upper unit disposed on the first surface, and a lower unit disposed on the second surface, and the positions of the upper unit and the lower unit correspond to each other;

[0014] The upper unit and the lower unit each include 1st to N+1th line groups, the center position of the 1st line group corresponds to the center point of the substrate, and the center position of the N+1th line group is connected to the end of the Nth line group.

[0015] In a possible implementation, each of the line groups includes a first connection port and a second connection port spaced apart from each other.

[0016] The output port includes a first output port and a second output port, the first output port is composed of the first connection port of the upper unit and the first connection port of the lower unit, and the second output port is composed of the second connection port of the upper unit and the second connection port of the lower unit;

[0017] The first output port is connected to one type of the radiating dipole, and the second connection port is connected to another type of the radiating dipole.

[0018] In a possible implementation, the two radiation dipoles are respectively a first radiation dipole and a second radiation dipole;

[0019] When N=0, the first radiating dipole and the second radiating dipole adopt coaxial differential feeding;

[0020] When N>0, the first radiating dipole and the second radiating dipole adopt a one-point K parallel two-wire feeding network, where K=2 N+1 .

[0021] In a possible implementation, the left radiating arm and the right radiating arm both have a mounting slot, the substrate further has a protrusion, and the protrusion is correspondingly inserted into the mounting slot; and / or,

[0022] The lengths of the left radiating arm and the right radiating arm are consistent, and the lengths of the left radiating arm and the right radiating arm are both 1 / 4 times the wavelength of the low-frequency band signal radiated by the antenna.

[0023] In one possible implementation, when N>0:

[0024] The distance between two adjacent first radiating dipoles is the length of a single radiating dipole; and / or,

[0025] The distance between two adjacent second radiating dipoles is the length of a single radiating dipole.

[0026] In a possible implementation, the meandering portion includes:

[0027] A first meandering line, wherein a first end of the first meandering line is connected to the left radiation arm, and a second end of the first meandering line extends to a center position of the radiation dipole and is electrically connected to the upper unit and the lower unit;

[0028] A second meandering line, wherein a first end of the second meandering line is connected to the right radiation arm, and a second end of the second meandering line extends to the center position of the radiation dipole and is electrically connected to the upper unit and the lower unit.

[0029] In a possible implementation, the parallel double wires include a feeding hole disposed on the first surface and a feeding pad disposed on the second surface, and the feeding hole and the feeding pad are respectively used to connect the positive electrode and the negative electrode of the external feeding structure.

[0030] In one possible implementation, the antenna also includes a support plate, the support plate is made of a high dielectric constant material, the radiating dipole is arranged on the support plate, a through hole is opened in the support plate, and the first meandering line and the second meandering line are electrically connected to the upper unit and the lower unit through the through hole.

[0031] The present application also provides a smart terminal, including a smart terminal body and the above-mentioned antenna.

[0032] The antenna provided by the present invention can efficiently distribute input signals to multiple radiating dipoles, ensuring that the signals received by each radiating dipole have the same amplitude and phase. This step-by-step distribution structure not only improves the performance of the antenna, but also simplifies the manufacturing and debugging process of the antenna.

[0033] The present invention provides an antenna, which has an H-plane radiation pattern that is nearly circular when operating in two frequency bands while maintaining a small cross-section, and has a gain and an E-plane beam width that meet the application scenarios of smart terminals.

[0034] An antenna provided by the present invention can have a variety of deformation modes. For example, changing the material of the substrate can further change the size of the antenna, and changing the length of the left radiating arm and the right radiating arm of the radiating dipole and the size of the winding line can make the antenna work in other frequency bands, etc. All parameters in the present invention can be adjusted under the premise of achieving impedance matching and omnidirectional radiation in the horizontal plane, and at the same time, different requirements for antenna gain and beam width are required according to different application scenarios.

[0035] In an antenna provided by the present invention, the feeding network formed is arranged differently from the traditional power division network, and K output ports are alternately arranged on both sides of the substrate to achieve a small cross-section of the antenna array and good omnidirectional radiation capability.

[0036] In addition to the technical problems solved by the embodiments of the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by an antenna and a smart terminal provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0038] Figure 1 An exploded diagram of an antenna provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of a first radiating dipole of an antenna provided in an embodiment of the present application;

[0040] Figure 3A schematic diagram of the structure of a second radiating dipole of an antenna provided in an embodiment of the present application;

[0041] Figure 4 A schematic structural diagram of the first surface of a substrate of an antenna provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of the second surface of the substrate of the antenna provided in an embodiment of the present application;

[0043] Figure 6 An S-parameter diagram of the antenna provided in an embodiment of the present application;

[0044] Figure 7 A peak gain diagram of the antenna provided in the embodiment of the present application;

[0045] Figure 8 The H-plane radiation pattern of the antenna provided in the embodiment of the present application at 2.45 GHz;

[0046] Fig. 9 The E-plane radiation pattern of the antenna provided in the embodiment of the present application at 2.45 GHz;

[0047] Fig.10 The H-plane radiation pattern of the antenna provided in the embodiment of the present application at 5.5 GHz;

[0048] Fig.11 The E-plane radiation pattern of the antenna provided in the embodiment of the present application at 5.5 GHz;

[0049] Fig.12 A schematic diagram of the hardware structure of a mobile terminal provided in an embodiment of the present application.

[0050] Description of reference numerals:

[0051] 10-substrate; 11-first surface; 12-second surface; 13-feeding hole; 14-feeding pad; 15-protrusion;

[0052] 20-parallel double lines; 21-upper unit; 22-lower unit; 23-first connection port; 24-second connection port; 25-output port; 251-first output port; 252-second output port;

[0053] 30-radiating dipole; 31-first radiating dipole; 32-second radiating dipole;

[0054] 40-feeding point;

[0055] 51-left radiating arm; 52-right radiating arm; 53-meandering portion; 531-first meandering line; 532-second meandering line; 54-mounting slot; 55-first conductive portion; 56-second conductive portion;

[0056] 60-support plate; 61-through hole;

[0057] 500-mobile terminal; 501-radio 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.

[0058] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. 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 DESCRIPTION

[0059] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0060] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0061] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, 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 "at the time of" or "when" or "in response to determination". Furthermore, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising", "including" indicate that there are the above-mentioned features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following" etc. used in this application may be interpreted as inclusive, or mean any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”, and for another example, “A, B or C” or “A, B and / or C” means “any 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 only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0062] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0063] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0064] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0065] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0066] Current smart terminals such as mobile phones generally support the Wi-Fi 6 standard and operate in two frequency bands: 2.4G and 5.5GHz. At the same time, for most mobile terminals, the antenna needs to have a 360° omnidirectional radiation characteristic in the horizontal direction to ensure the stability of device transmission. The current dual-band omnidirectional antenna has the technical problem of being difficult to achieve the omnidirectional radiation characteristics of 2.4GHz and 5.5GHz dual-band operation due to the limited cross-sectional size.

[0067] The present invention provides an antenna, wherein a parallel double line is arranged on a substrate, wherein the parallel double line is rotationally symmetrical with the center point of the substrate as the symmetry center, and the parallel double line has K output ports, wherein K=2 N+1 The radiating dipoles are electrically connected to the output ports respectively to realize equal-amplitude and in-phase signal output; the radiating dipoles include a left radiating arm and a right radiating arm, and the antenna satisfies the low-frequency signal radiation of 2.4 GHz through the left radiating arm and the right radiating arm. A meandering portion is provided between the left radiating arm and the right radiating arm to realize high-frequency impedance matching, so that the antenna satisfies the high-frequency omnidirectional radiation mode of 5.5 GHz, and does not affect the performance of the low-frequency omnidirectional radiation mode, thereby realizing dual-frequency omnidirectional radiation and meeting the omnidirectional uniform radiation effect, so that the antenna has good directivity and gain characteristics.

[0068] An antenna and a smart terminal provided in an embodiment of the present application are described below with reference to the accompanying drawings.

[0069] refer to Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an antenna, comprising:

[0070] A substrate 10, the substrate 10 is made of a high dielectric constant material, and the substrate 10 is provided with parallel double lines 20;

[0071] Two types of radiating dipoles 30, the number of each type of radiating dipoles 30 is 2 N , wherein N is a natural number, and the radiating dipole 30 includes a left radiating arm 51 and a right radiating arm 52, and a meandering portion 53 is provided between the left radiating arm 51 and the right radiating arm 52;

[0072] A feeding point 40 , which is disposed at the center of the substrate 10 and is located on the parallel double lines 20 ;

[0073] The parallel double line 20 has K output ports 25 for realizing equal amplitude and same phase signal output, where K=2 N+1 , the radiating dipole 30 is electrically connected to the output port 25 .

[0074] The present invention provides an antenna, wherein a parallel double line 20 is arranged on a substrate 10, and the parallel double line 20 has K output ports 25, wherein K=2 N+1 The radiating dipole 30 is electrically connected to the output port 25 to realize equal-amplitude and in-phase signal output; the radiating dipole 30 includes a left radiating arm 51 and a right radiating arm 52, and the left radiating arm 51 and the right radiating arm 52 enable the antenna to meet the low-frequency signal radiation of 2.4 GHz. A winding portion 53 is provided between the left radiating arm 51 and the right radiating arm 52 to achieve high-frequency impedance matching, so that the antenna meets the high-frequency omnidirectional radiation mode of 5.5 GHz, and does not affect the performance of the low-frequency omnidirectional radiation mode, thereby realizing dual-frequency omnidirectional radiation and meeting the omnidirectional uniform radiation effect, so that the antenna has good directivity and gain characteristics.

[0075] In addition, since the substrate 10 is made of high dielectric constant material, it helps to reduce the cross-sectional size of the antenna and improve its performance, thereby miniaturizing the antenna volume, thereby solving the problem that the antenna in the prior art cannot provide dual-band omnidirectional radiation technology under space conditions with limited cross-sectional dimensions.

[0076] In one possible implementation, reference Figure 1 , Figure 2 and Figure 3 As shown, the length×width of the radiating dipole 30 is 42.7 mm×10 mm, so that the antenna can radiate a low-frequency signal of 2.4 GHz.

[0077] The parallel double lines 20 are rotationally symmetrical with the center point of the substrate 10 as the symmetry center. The number of various radiating dipoles 30 is 2 N Where N is a natural number, the parallel double line 20 has K output ports 25 for realizing equal amplitude and same phase signal output, where K=2 N+1 The radiating dipole 30 is electrically connected to the output port 25 , and the multiple output ports 25 can ensure that each radiating dipole 30 receives the same signal characteristics, thereby achieving optimized radiation performance.

[0078] For example, when N=0, the number of various radiating dipoles 30 is 1, and the parallel double wire 20 has 2 output ports 25, realizing equal amplitude and in-phase power distribution of one-to-two; when N=1, the number of various radiating dipoles 30 is 2, and the parallel double wire 20 has 4 output ports 25, realizing equal amplitude and in-phase power distribution of one-to-four; when N=2, the number of various radiating dipoles 30 is 4, and the parallel double wire 20 has 8 output ports 25, realizing equal amplitude and in-phase power distribution of one-to-eight, and so on, the antenna proposed by the present invention can adjust the number of equal amplitude and in-phase power distribution accordingly. According to the value of N, the parallel double wire feeding network is expanded accordingly.

[0079] refer to Figure 4 and Figure 5 As shown, this example is introduced by taking N=1, the parallel two-wire 20 has four output ports 25, and the one-to-four equal-amplitude and in-phase power distribution is implemented as an example.

[0080] refer to Figure 1 , Figure 2 and Figure 3 As shown, since the radiating dipoles 30 include a left radiating arm 51 and a right radiating arm 52, a meandering portion 53 is provided between the left radiating arm 51 and the right radiating arm 52, forming a structure with completely identical dimensions but mirror symmetry, the high-frequency omnidirectional radiation mode of the radiating dipole 30 is adjusted to impedance matching at 5.5 GHz through the meandering portion 53, while having almost no effect on the impedance matching of the low-frequency omnidirectional mode at 2.4 GHz and the omnidirectional radiation performance.

[0081] An antenna provided by the present invention realizes impedance matching and omnidirectional radiation in two frequency bands of 2.45 GHz and 5.5 GHz by setting a meandering portion 53 between a left radiating arm 51 and a right radiating arm 52 of a radiating dipole 30, and realizes a four-unit array by improving a power division network with a topological structure formed by a parallel double line 20.

[0082] In one possible implementation, reference Figure 4 and Figure 5 As shown, the parallel double wire 20 can be engraved on the surface of the substrate 10. The parallel double wire 20 is a metal wire, such as a copper wire, which realizes equal-amplitude and unidirectional signal radiation, and realizes a parallel double-wire power division network in the form of parallel double wires, that is, a network that separates power.

[0083] The substrate 10 is made of a high dielectric constant material. The substrate 10 may be a ceramic dielectric substrate, a mica dielectric substrate, or a polyimide polymer dielectric substrate. The selection of a high dielectric constant material helps to reduce the cross-sectional size of the antenna and improve its performance, thereby miniaturizing the antenna.

[0084] Generally, a high dielectric constant material is a material having a dielectric constant greater than 3.9.

[0085] The feed point 40 provides an input signal for the antenna. The feed point 40 is the entrance of the input signal, and the RF signal is transmitted to various parts of the antenna through the feed point 40. The feed point 40 is arranged at the center of the substrate 10 and is located on the parallel double wires 20, which helps to achieve symmetrical feeding and helps the antenna achieve uniform current distribution, thereby improving the radiation pattern and input impedance characteristics of the antenna.

[0086] refer to Figure 1 , Figure 2 and Figure 3 As shown, the present application adjusts the high-frequency omnidirectional radiation mode of the radiating dipole 30 to impedance matching at 5.5 GHz by setting a meandering portion 53 between the left radiating arm 51 and the right radiating arm 52, while not affecting the impedance matching and omnidirectional radiation performance of the low-frequency omnidirectional radiation mode at 2.4 GHz. This means that at a frequency of 5.5 GHz, the antenna can effectively radiate and receive signals, reduce reflections and losses, and the antenna can still maintain good performance at low frequencies, and will not cause performance degradation due to high-frequency optimization, so that the antenna provided by the present application can be used in devices that need to work in multiple frequency bands and require efficient radiation performance.

[0087] In one possible implementation, reference Figure 1 , Figure 4 and Figure 5 As shown, the substrate 10 has a first surface 11 and a second surface 12, and the parallel double line 20 includes an upper unit 21 arranged on the first surface 11, and a lower unit 22 arranged on the second surface 12, and the positions of the upper unit 21 and the lower unit 22 correspond; the upper unit 21 and the lower unit 22 both include 1st to N+1th line groups, the center position of the 1st line group corresponds to the center point of the substrate 10, and the center position of the N+1th line group is connected to the end of the Nth line group.

[0088] The upper unit 21 and the lower unit 22 form a two-stage parallel two-wire power division network, which is used to achieve one-to-four equal-amplitude and in-phase power distribution to achieve the feeding of the two first radiating dipoles 31 and the two second radiating dipoles 32. Through the design of the two-stage parallel two-wire power division network, the antenna can effectively distribute the input signal to multiple radiating dipoles 30, ensuring the equal-amplitude and in-phase output of the signal, and has important applications in wireless communication systems that require efficient power distribution and complex radiation patterns.

[0089] The substrate 10 is in the shape of a long strip, which is conducive to arranging the antenna provided by the present application inside a smart terminal, such as a mobile phone, to reduce the occupied space.

[0090] In the present application, by arranging parallel double lines 20 on two surfaces, namely the first surface 11 and the second surface 12, a complex circuit design is realized in a limited space, and the area of ​​the substrate 10 can be more effectively utilized to realize complex signal processing and radiation control functions.

[0091] The positions of the upper unit 21 and the lower unit 22 correspond, which means that the upper unit 21 and the lower unit 22 have the same geometric layout on different surfaces of the substrate 10, which helps to maintain the phase consistency and amplitude balance of the signal, thereby achieving equal amplitude and same phase power distribution.

[0092] Since the upper unit 21 and the lower unit 22 both include the 1st to N+1th level line groups, the center position of the 1st level line group corresponds to the center point of the substrate 10, and the center position of the N+1th level line group is connected to the end of the Nth level line group. This structure allows the signal to start from the center of the substrate and transmit outward step by step, which facilitates the signal to be distributed step by step, ensuring the effective transmission and distribution of the signal between each level, ensuring the transmission and distribution effect of the signal between different levels, reducing signal loss and improving the uniformity of signal distribution.

[0093] In one possible implementation, when N=0, the upper unit 21 and the lower unit 22 both include a level 1 line group, which is a first-level line group. The center position of the first-level line group corresponds to the center point of the substrate 10, and the two ends of the first-level line group are rotationally symmetric with the center point of the substrate 10 as the center of symmetry. When N=1, the upper unit 21 and the lower unit 22 both include the 1st to the 2nd level line groups, wherein the center position of the 1st level line group corresponds to the center point of the substrate 10, the two ends of the 1st level line group are rotationally symmetric with the center point of the substrate 10 as the center of symmetry, and the center position of the 2nd level line group is respectively connected to the end of the 1st level line group; by analogy, when N>1, since the upper unit 21 and the lower unit 22 both include the 1st to the N+1th level line groups, the center position of the 1st level line group corresponds to the center point of the substrate 10, the center position of the 2nd level line group is respectively connected to the end of the 1st level line group, the center position of the 3rd level line group is respectively connected to the end of the 2nd level line group, ... the center position of the N+1th level line group is connected to the end of the Nth level line group. In addition, since the two ends of each level line group are rotationally symmetric with the center point of the substrate 10 as the center of symmetry, the transmission and distribution effect of the signal between different levels is achieved, and the equal-amplitude and in-phase power distribution of the signal is achieved.

[0094] The antenna provided by the present invention can efficiently distribute the input signal to multiple radiating dipoles 30, ensuring that the signal received by each radiating dipole 30 has the same amplitude and phase. This step-by-step distribution structure not only improves the performance of the antenna, but also simplifies the manufacturing and debugging process of the antenna.

[0095] In a possible implementation, each level of the line group includes a first connection port 23 and a second connection port 24 that are spaced apart from each other;

[0096] refer to Figure 1 , Figure 4 and Figure 5 As shown, the output port 25 includes a first output port 251 and a second output port 252. The first output port 251 is composed of the first connection port 23 of the upper unit 21 and the first connection port 23 of the lower unit 22. The second output port 252 is composed of the second connection port 24 of the upper unit 21 and the second connection port 24 of the lower unit 22.

[0097] The first output port 251 is connected to one type of radiating dipole 30 , and the second connection port 24 is connected to another type of radiating dipole 30 .

[0098] Such a structure is used to realize a multi-band or multi-mode antenna system, in which different radiating dipoles 30 are connected through different output ports to achieve specific radiation characteristics or frequency responses, which can support different communication requirements or optimize different signal paths in the same system.

[0099] In a possible implementation, the two radiating dipoles 30 are respectively a first radiating dipole 31 and a second radiating dipole 32 , and both radiating dipoles 30 are mirror-symmetrical structures.

[0100] When N=0, the first radiating dipole 31 and the second radiating dipole 32 adopt coaxial differential feeding; this signal transmission line consists of two signal lines, and the phases of the differential signal on the two signal lines are opposite. The receiving end recovers the signal by comparing the voltage difference between the two signal lines. This feeding method is usually used to provide balanced signal transmission and reduce common mode interference. It is suitable for high-frequency applications and can achieve more stable and efficient signal transmission in complex electromagnetic environments.

[0101] When N>0, the first radiating dipole 31 and the second radiating dipole 32 adopt a one-point K parallel two-wire feeding network, where K=2 N+1 This transmission line consists of two parallel conductors, usually spaced a certain distance apart. The spacing between the conductors and the diameter of the conductors determine the characteristic impedance of the transmission line. This feeding method involves splitting the signal into K paths, which is used to achieve more complex radiation patterns or multi-channel signal transmission. K = 2 N+1 It indicates that the number of paths in the feeding network changes with the change of N.

[0102] Since the parallel two-line feeding network is rotationally symmetric with the center point of the substrate 10 as the symmetry center, its K output ports 25 realize K-channel signal outputs with equal amplitude and phase.

[0103] Because the electric and magnetic fields of the parallel two-wire are mainly concentrated in the space between the conductors, the parallel two-wire transmission line has low loss. In complex antenna systems, the parallel two-wire feeding network can be used to distribute signals to multiple antenna elements, or collect signals from multiple antenna elements to meet specific radiation patterns or frequency responses.

[0104] This application allows the feeding mode to be flexibly adjusted under different operating conditions according to N to optimize antenna performance or meet specific application requirements. By selecting a suitable feeding mode, better signal transmission efficiency and radiation characteristics can be achieved.

[0105] In one possible implementation, reference Figure 1 , Figure 3 and Figure 4 As shown, the left radiating arm 51 and the right radiating arm 52 both have a mounting groove 54, and the substrate 10 also has a protrusion 15, which is correspondingly plugged into the mounting groove 54; such a structure facilitates the left radiating arm 51 and the right radiating arm 52 to be plugged and assembled to the substrate 10 to ensure the stability of the connection and the effect of reliable installation.

[0106] In a possible implementation, the mounting slot 54 may be a through slot that passes through the radiating dipole 30 .

[0107] In a possible implementation, the mounting groove 54 may be a rectangular groove or an arc-shaped groove, and the shape of the protrusion 15 corresponds to the shape of the mounting groove 54, thereby improving the stability of the installation while ensuring smooth installation.

[0108] In a possible implementation, the mounting slot 54 may be located at a center position of the left radiating arm 51 and a center position of the right radiating arm 52 .

[0109] In a possible implementation, the protrusion 15 may be located at a side edge of the substrate 10 , so as to facilitate the protrusion 15 to be correspondingly inserted into the installation groove 54 .

[0110] In a possible implementation, the lengths of the left radiating arm 51 and the right radiating arm 52 are the same, and the lengths of the left radiating arm 51 and the right radiating arm 52 are both 1 / 4 times the wavelength of the low-frequency signal radiated by the antenna. In the present application, the low-frequency signal radiated by the antenna is a 2.4 GHz frequency band, and the corresponding signal wavelength is about 0.125 meters.

[0111] This design is used to achieve resonance of 1 / 4 wavelength, which helps to achieve good radiation efficiency and impedance matching effect at a specific frequency, reduce reflection loss, and ensure the effectiveness of radiating signals in low frequency bands. In addition, the quarter-wavelength antenna can effectively radiate and receive signals, improving the overall radiation efficiency of the antenna.

[0112] The lengths of the left radiating arm 51 and the right radiating arm 52 are consistent, which helps to ensure the consistency of the radiation characteristics of the antenna in all directions and reduce directivity deviation.

[0113] In a possible implementation, when N>0: the distance between two adjacent first radiating dipoles 31 is the length of a single radiating dipole 30; the distance between two adjacent second radiating dipoles 32 is the length of a single radiating dipole 30. The purpose is to achieve the same-direction excitation of K radiating dipoles.

[0114] In addition, appropriate spacing can reduce coupling and interference between adjacent radiating dipoles 30, optimize the performance of the overall antenna array, and can also be used to form an antenna array to achieve uniform spatial distribution of the radiating dipoles 30. This uniform distribution helps to form a consistent radiation pattern and improve the directivity and gain of the antenna.

[0115] In one possible implementation, reference Figure 1 , Figure 2 and Figure 3 As shown, the meandering portion 53 includes: a first meandering line 531 and a second meandering line 532, wherein the first end of the first meandering line 531 is connected to the left radiating arm 51, the second end of the first meandering line 531 extends to the center position of the radiating dipole 30, and is electrically connected to the upper unit 21 and the lower unit 22; the first end of the second meandering line 532 is connected to the right radiating arm 52, the second end of the second meandering line 532 extends to the center position of the radiating dipole 30, and is electrically connected to the upper unit 21 and the lower unit 22.

[0116] The first meandering line 531 and the second meandering line 532 are connected in a similar manner, which ensures the symmetry of the antenna and helps to achieve uniform radiation characteristics. The first meandering line 531 and the second meandering line 532 are rotationally symmetrical around the center position of the radiating dipole 30 .

[0117] In a possible implementation, the first meandering line 531 may be a bending line made of metal material.

[0118] In a possible implementation, the second meandering line 532 may be a bending line made of metal material.

[0119] In one possible implementation, the radiating dipole 30 has a first conductive portion 55 and a second conductive portion 56 at the center position, the second end of the first meandering line 531 is connected to the first conductive portion 55, the second end of the second meandering line 532 is connected to the second conductive portion 56, and the first conductive portion 55 and the second conductive portion 56 are both electrically connected to the upper unit 21 and the lower unit 22, so that the first meandering line 531 and the second meandering line 532 are both electrically connected to the upper unit 21 and the lower unit 22.

[0120] In one possible implementation, reference Figure 1 , Figure 4 and Figure 5 As shown, the parallel double line 20 includes a feeding hole 13 disposed on the first surface 11 and a feeding pad 14 disposed on the second surface 12, and the feeding hole 13 and the feeding pad 14 are respectively used to connect the positive electrode and the negative electrode of the external feeding structure. The design of the feeding hole 13 and the feeding pad 14 helps to improve the mechanical stability of the connection between the parallel double line 20 and the external feeding structure, and achieve efficient electrical connection and signal transmission effect.

[0121] The feeding hole 13 may be a through hole for connection through a wire or a pin, such as a through hole made of a metal material. The feeding hole 13 is usually used to connect the positive electrode of an external feeding structure to ensure the transmission of electrical signals.

[0122] The feed pad 14 provides a planar area for convenient welding and electrical connection. The feed pad 14 is usually used to connect the negative electrode of an external feed structure.

[0123] In the present application, the feeding hole 13 and the feeding pad 14 are respectively connected to the positive and negative electrodes of the external feeding structure, and the equal-amplitude and same-direction signal output of the K output ports of the feeding network is realized through an N+1-level parallel two-wire power division network.

[0124] In one possible implementation, reference Figure 1 , Figure 2 and Figure 3 As shown, the antenna also includes a support plate 60, which is made of a high dielectric constant material. The radiating dipole 30 is arranged on the support plate 60. A through hole 61 is opened in the support plate 60. The first meandering line 531 and the second meandering line 532 are electrically connected to the upper unit 21 and the lower unit 22 through the through hole 61.

[0125] In a possible implementation, the support plate 60 may be made of, for example, ceramic material, mica material, or polyimide polymer material.

[0126] The radiating dipole 30 may be attached to the supporting plate 60 to support the radiating dipole 30 , which is beneficial to the miniaturization of the antenna.

[0127] In a possible implementation, the number of through holes 61 may be two, for respectively allowing the first conductive portion 55 and the second conductive portion 56 to pass through, so that the first conductive portion 55 and the second conductive portion 56 are electrically connected to the upper unit 21 and the lower unit 22 .

[0128] In the present application, the two-layer parallel double-wire feeding network formed by the parallel double wires 20 has corresponding positions on the first surface 11 of the substrate 10 and the second surface 12 of the substrate 10 and has the same structural dimensions except for the feeding pads 14 and the feeding holes 13 .

[0129] Taking N=1, the parallel double line 20 has 4 output ports 25 to achieve one-to-four equal-amplitude and in-phase power distribution as an example, wherein the upper unit 21 and the lower unit 22 both include a first parallel double line segment, a second parallel double line segment, a third parallel double line segment and a fourth parallel double line segment connected in sequence from the left or right side to the center direction, wherein the first parallel double line segment and the third parallel double line segment have the same width, and the second parallel double line segment and the fourth parallel double line segment have the same width.

[0130] The present invention provides an antenna, which has an H-plane radiation pattern that is nearly circular when operating in two frequency bands while maintaining a small cross-section, and has a gain and an E-plane beam width that meet the application scenarios of smart terminals.

[0131] An antenna provided by the present invention can have a variety of deformation modes. For example, changing the material of the substrate 10 can further change the size of the antenna, and changing the length of the left radiating arm 51 and the right radiating arm 52 of the radiating dipole 30 and the size of the meandering portion 53 can make the antenna work in other frequency bands, etc. Various parameters in the present invention can be adjusted under the premise of achieving impedance matching and omnidirectional radiation in the horizontal plane, and at the same time according to different requirements for antenna gain and beam width in different application scenarios.

[0132] In an antenna provided by the present invention, the feeding network formed is arranged differently from the traditional power splitter network, and K output ports 25 are alternately arranged on both sides of the substrate 10 to achieve a small cross-section of the antenna array and good omnidirectional radiation capability.

[0133] Use simulation software (Computer Simulation Technology, referred to as CST) according to Figures 1 to 5 The antenna shown in the figure is simulated and verified. The materials of the feed hole 13, the feed pad 14, the upper unit 21, the lower unit 22, the left radiation arm 51, and the right radiation arm 52 are all copper. The materials of the substrate 10 and the support plate 60 are ceramics, whose dielectric constant is 6.15 and the loss tangent is 0.0025. The length × width × thickness of the substrate 10 is: 171.2mm × 9mm × 0.5mm. The length × width × thickness of the support plate 60 is: 43.1mm × 10.4mm × 0.5mm, the diameter of the feed hole 13 is 0.25mm, and the length × width × depth of the protrusion 15 and the mounting groove 54 is 15mm × 0.5mm × 0.5mm. The width of the first parallel double line segment and the third parallel double line segment is 0.7mm, the width of the second parallel double line segment and the fourth parallel double line segment is 0.25mm, and the length × width of the two radiating dipoles 30 is 42.7mm × 10mm.

[0134] Figures 6 to 11The simulation results of the proposed antenna embodiment are shown in Figure 2. Figure 6 As shown, the antenna operating bandwidth is 2.28~2.49GHz and 5.46~5.91GHz. Figure 7 As shown in the figure, the peak gain of the antenna in the working frequency band is 4.4~4.6dBi and 4.4~6.9dBi. Figure 8 As shown in the figure, the H-plane radiation of the antenna at 2.4GHz is circular, with a non-circularity of 0.4dB and a cross-polarization better than 23dB. The H-plane radiation pattern shows that the signal coverage and uniformity are good.

[0135] refer to Fig. 9 As shown, the 3dB beamwidth of the E-plane radiation of the antenna at 2.4GHz is 28.5°, and the cross-polarization is better than 20.3dB within the 3dB beam range. Fig.10 As shown, the H-plane radiation of the antenna at 5.5GHz is circular, the non-circularity is 0.6dB, and the cross-polarization is better than 18.3dB. Fig.11 As shown, the 3dB beamwidth of the antenna at 5.5GHz E-plane radiation is 15.2°, and the cross polarization is better than 21dB within the 3dB beam range. This shows that the antenna provided by the present application has good omnidirectional radiation characteristics at dual frequencies of 2.4GHz and 5.5GHz.

[0136] In the present application, the meandering portion 53 is used to adjust the high-frequency signal. The meandering portion 53 adjusts the high-frequency omnidirectional radiation mode of the radiating dipole 30 to impedance matching at 5.5 GHz, while not affecting the impedance matching and omnidirectional radiation performance of the low-frequency omnidirectional radiation mode at 2.4 GHz, thereby achieving matching and omnidirectional radiation of the radiating dipole 30 in two frequency bands.

[0137] In the present application, by arranging parallel double wires 20 on the substrate 10, the parallel double wires 20 form a parallel double wire power division network with a topological structure, which reduces the cross-sectional area without affecting the omnidirectional performance of the radiating antenna. It has the advantages of small cross-section, high gain, stable omnidirectional radiation performance, etc., so that the antenna provided in the present application has good prospects in application fields such as smart mobile terminals and smart devices.

[0138] The antenna provided in the present application is suitable for various wireless communication applications. By using a high dielectric constant material and a specific antenna geometry structure on the substrate 10, the antenna can achieve excellent antenna performance in a compact size.

[0139] The present application also provides a smart terminal, including a smart terminal body and the above-mentioned antenna.

[0140] Since the above antenna has the characteristics of small cross-section, dual-band and omnidirectional, it can meet the limited installation space requirements and communication requirements of the smart terminal body, and improve the communication effect of the smart terminal.

[0141] The smart terminal may be implemented in various forms. For example, the smart terminal described in this application may include smart terminals such as mobile phones, tablet computers, laptop computers, 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.

[0142] The following description will be made by taking a mobile terminal as an example, and those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the construction according to the embodiments of the present application can also be applied to fixed-type terminals.

[0143] Please refer to Fig.12 As shown, it 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. Those skilled in the art can understand that Fig.12 The structure of the mobile terminal shown in the figure does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0144] Combine the following Fig.12 The following is a detailed introduction to the various components of the mobile terminal:

[0145] The radio frequency unit 501 can be used to receive and send signals during information transmission or communication. Optionally, after receiving the downlink information of the base station, it is sent to the processor 510 for processing; in addition, 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 through wireless communication. The above-mentioned wireless communications 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.

[0146] WiFi is a short-range wireless transmission technology. The mobile terminal can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 502. It provides users with wireless broadband Internet access. Fig.12 A WiFi module 502 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the application.

[0147] The audio output unit 503 can convert the audio data received by the RF 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 talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 503 can also provide audio output related to a specific function performed by the mobile terminal 500 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 503 may include a speaker, a buzzer, etc.

[0148] The A / V input unit 504 is used to receive audio or video signals. The A / V input unit 504 may include a graphics processor (GPU) 5041 and a microphone 5042, and the graphics processor 5041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 506. The image frame processed by the graphics processor 5041 can be stored in the memory 509 (or other storage medium) or sent via the radio frequency unit 501 or the WiFi module 502. The microphone 5042 can receive sound (audio data) via the microphone 5042 in a telephone call mode, a recording mode, a voice recognition mode, and other operating modes, and can process such sound into audio data. The processed audio (voice) data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 501 in the case of a telephone call mode. The microphone 5042 can implement various types of noise elimination (or suppression) algorithms to eliminate (or suppress) noise or interference generated in the process of receiving and sending audio signals.

[0149] The mobile terminal 500 also 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 type 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. It 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 pedometer, tapping), etc.; as for other sensors that can also be configured on the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0150] The display unit 506 is used to display information input by the user or information provided to the user. The display unit 506 may include a display panel 5061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0151] The user input unit 507 can be used to receive input digital or character information, and to generate key signal input 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 the user's touch operation on or near it (such as the user's operation on the touch panel 5071 or near the touch panel 5071 using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection device according to a pre-set program. The touch panel 5071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch orientation, 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 the touch point coordinates, and then sends it to the processor 510, and can receive and execute the command sent by the processor 510. In addition, the touch panel 5071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 5071, the user input unit 507 may also 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, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.

[0152] Optionally, the touch panel 5071 may cover the display panel 5061. When the touch panel 5071 detects a touch operation on or near it, it transmits the information to the processor 510 to determine the type of the touch event. Then, the processor 510 provides a corresponding visual output on the display panel 5061 according to the type of the touch event. Fig.12 In the figure, the touch panel 5071 and the display panel 5061 are used as two independent components to realize the input and output functions of the mobile terminal. However, 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, which is not limited here.

[0153] 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 headphone port, etc. The interface unit 508 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or at least one element within the mobile terminal 500 or may be used to transmit data between the mobile terminal 500 and an external device.

[0154] The memory 509 can be used to store software programs and various data. The memory 509 can mainly include a program storage area and a data storage area. Optionally, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 509 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0155] The processor 510 is the control center of the mobile terminal. It uses various interfaces and lines to connect various parts of the entire mobile terminal. It executes various functions of the mobile terminal and processes data by running or executing software programs and / or modules stored in the memory 509, and calling data stored in the memory 509, so as to monitor the mobile terminal as a whole. The processor 510 may include one or at least one processing unit; preferably, the processor 510 may integrate an application processor and a modem processor. Optionally, the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 510.

[0156] The mobile terminal 500 may also include a power supply 511 (such as a battery) for supplying power to various components. Preferably, the power supply 511 may be logically connected to the processor 510 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system.

[0157] although Fig.12 Not shown, the mobile terminal 500 may also include a Bluetooth module, etc., which will not be described in detail here.

[0158] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0159] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An antenna, characterized in that: include: A substrate (10), wherein the substrate (10) is made of a high dielectric constant material and is provided with parallel double lines (20); Two types of radiating dipoles (30), the number of each type of radiating dipoles (30) is 2 N wherein N is a natural number, the radiating dipoles (30) each comprise a left radiating arm (51) and a right radiating arm (52), and a meandering portion (53) is provided between the left radiating arm (51) and the right radiating arm (52); A feeding point (40), the feeding point (40) being arranged at a central position of the substrate (10) and located on the parallel double lines (20); The parallel double line (20) has K output ports (25), where K=2 N+1 , the radiating dipole (30) is electrically connected to the output port (25) accordingly.

2. The antenna according to claim 1, characterized in that The parallel double lines (20) are rotationally symmetrical with the center point of the substrate (10) as the symmetry center, the substrate (10) has a first surface (11) and a second surface (12), the parallel double lines (20) include an upper layer unit (21) arranged on the first surface (11), and a lower layer unit (22) arranged on the second surface (12), and the positions of the upper layer unit (21) and the lower layer unit (22) correspond to each other; The upper unit (21) and the lower unit (22) both include 1st to N+1th line groups, the center position of the 1st line group corresponds to the center point of the substrate (10), and the center position of the N+1th line group is connected to the end of the Nth line group.

3. The antenna according to claim 2, characterized in that: Each level of the line group comprises a first connection port (23) and a second connection port (24) which are arranged at intervals from each other. The output port (25) comprises a first output port (251) and a second output port (252), the first output port (251) being composed of the first connection port (23) of the upper unit (21) and the first connection port (23) of the lower unit (22), and the second output port (252) being composed of the second connection port (24) of the upper unit (21) and the second connection port (24) of the lower unit (22); The first output port (251) is connected to one type of the radiating dipole (30), and the second connection port (24) is connected to another type of the radiating dipole (30).

4. The antenna according to any one of claims 1 to 3, characterized in that: The two types of radiating dipoles (30) are respectively a first radiating dipole (31) and a second radiating dipole (32); When N=0, the first radiating dipole (31) and the second radiating dipole (32) adopt coaxial differential feeding; When N>0, the first radiating dipole (31) and the second radiating dipole (32) adopt a one-point K parallel two-wire feeding network, where K=2 N+1 .

5. The antenna according to any one of claims 1 to 3, characterized in that: The left radiating arm (51) and the right radiating arm (52) both have a mounting groove (54), the substrate (10) further has a protrusion (15), and the protrusion (15) is correspondingly inserted into the mounting groove (54); and / or, The lengths of the left radiation arm (51) and the right radiation arm (52) are consistent, and the lengths of the left radiation arm (51) and the right radiation arm (52) are both 1 / 4 times the wavelength of the low-frequency band signal radiated by the antenna.

6. The antenna according to claim 4, characterized in that: When N>0: The distance between two adjacent first radiating dipoles (31) is the length of a single radiating dipole (30); and / or, The distance between two adjacent second radiating dipoles (32) is the length of a single radiating dipole (30).

7. The antenna according to claim 2, characterized in that: The meandering portion (53) comprises: A first meandering line (531), wherein a first end of the first meandering line (531) is connected to the left radiation arm (51), and a second end of the first meandering line (531) extends to the center position of the radiation dipole (30) and is electrically connected to the upper unit (21) and the lower unit (22); A second meandering line (532), wherein a first end of the second meandering line (532) is connected to the right radiation arm (52), and a second end of the second meandering line (532) extends to a center position of the radiation dipole (30) and is electrically connected to the upper unit (21) and the lower unit (22).

8. The antenna according to claim 2, characterized in that: The parallel double wire (20) comprises a feeding hole (13) arranged on the first surface (11), and a feeding pad (14) arranged on the second surface (12), wherein the feeding hole (13) and the feeding pad (14) are respectively used to connect the positive electrode and the negative electrode of the external feeding structure.

9. The antenna according to claim 7, characterized in that: The invention also comprises a support plate (60), wherein the support plate (60) is made of a high dielectric constant material, the radiation dipole (30) is arranged on the support plate (60), a through hole (61) is opened in the support plate (60), and the first meandering line (531) and the second meandering line (532) are both electrically connected to the upper unit (21) and the lower unit (22) through the through hole (61).

10. An intelligent terminal, characterized in that: It comprises a smart terminal body and the antenna described in any one of claims 1-9.

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