Antenna and communication device

Abstract

The embodiment of the utility model provides an antenna and communication equipment, the antenna comprises a dielectric substrate and a first radiator, the dielectric substrate is provided with a feed port, and the feed port is suitable for being connected with a feed source; the first radiator is arranged on the dielectric substrate and comprises a body, a high-frequency branch knot and a low-frequency branch knot, the body is connected with the feed port to enable the feed port to input an electric signal to the body, and the path length of the electric signal transmitted from the feed port to the end part of the high-frequency branch knot is smaller than the path length of the electric signal transmitted from the feed port to the end part of the low-frequency branch knot; at least part of the low-frequency branch extends to the side, away from the body, of the high-frequency branch, and the end of the low-frequency branch is coupled with the high-frequency branch. The antenna provided by the embodiment of the utility model has the advantages of relatively small size and relatively good low-frequency radiation effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and more particularly relates to an antenna and a communication device. BACKGROUND

[0002] Mobile communication devices usually select built-in communication modules, that is, communication antennas are arranged in the interior of mobile communication devices. However, with the development of mobile communication products, the product size is getting smaller and smaller, the internal structure is getting more and more complex, and the space left for the design of mobile communication antennas is getting smaller and smaller. However, the small size characteristics and high radiation efficiency characteristics of the communication antennas in the related art are difficult to be compatible. UTILITY MODEL CONTENT

[0003] The purpose of the embodiments of the present application is to provide an antenna and a communication device to solve the technical problem that the small size characteristics and high radiation efficiency characteristics of the communication antennas in the prior art are difficult to be compatible.

[0004] In a first aspect, the embodiments of the present application provide an antenna.

[0005] The antenna provided by the embodiments of the present application comprises a dielectric substrate, a feed port is arranged on the dielectric substrate, and the feed port is adapted to be connected with a feed source; a first radiator is arranged on the dielectric substrate, the first radiator comprises a body, a high-frequency branch and a low-frequency branch, the body is connected with the feed port so that the feed port inputs an electric signal to the body, the path length of the electric signal conducted from the feed port to the end of the high-frequency branch is smaller than the path length of the electric signal conducted from the feed port to the end of the low-frequency branch, at least part of the low-frequency branch extends to one side of the high-frequency branch away from the body, and the end of the low-frequency branch is coupled and connected with the high-frequency branch.

[0006] The antenna provided by the embodiments of the present application has the beneficial effects that, compared with the prior art, the high-frequency branch and the low-frequency branch are arranged in the first radiator of the antenna provided by the embodiments of the present application, at least part of the low-frequency branch extends to one side of the high-frequency branch away from the body to lengthen the path length of the electric signal conducted in the low-frequency branch, so that the low-frequency radiation is realized by arranging the bent low-frequency branch, and the antenna provided by the embodiments of the present application has a small size and can also realize low-frequency radiation.

[0007] In addition, the end of the low-frequency branch of the antenna provided by the embodiments of the present application is coupled with the high-frequency branch, the coupling effect between the high-frequency branch and the low-frequency branch is optimized, the coupling capacitance in the high-frequency branch is changed, the antenna obtains better in-band matching characteristics in the high-frequency band, and the impedance of the high-frequency branch and the low-frequency branch is optimized, so that the radiation efficiency of the antenna is improved.

[0008] In conclusion, the antenna provided by the embodiment of the application has the advantages of small size and high radiation efficiency.

[0009] Optionally, the high-frequency branch has a plurality of high-frequency branches, and the plurality of high-frequency branches include a first branch and a second branch, a path length of the electric signal from the feeding port to an end of the first branch is different from a path length of the electric signal from the feeding port to an end of the second branch.

[0010] Optionally, the low-frequency branch includes a first segment extending along a first direction and a second segment extending along the first direction, one end of the first segment is connected to the body, the other end of the first segment extends to a side of the high-frequency branch away from the body, one end of the second segment is connected to the end of the first segment away from the body, and the other end of the second segment is connected to the coupling of the high-frequency branch.

[0011] Optionally, the second segment includes a plurality of reduced-diameter segments, the plurality of reduced-diameter segments are arranged along the first direction, and the widths of the plurality of reduced-diameter segments gradually decrease along a direction close to the body.

[0012] Optionally, the low-frequency branch further includes a third segment, one end of the third segment is connected to the end of the second segment close to the body, and the other end of the third segment extends towards the high-frequency branch along a direction orthogonal to the first direction, so that the end of the third segment is coupled to the high-frequency branch.

[0013] Optionally, the third segment is provided with a bending segment away from the end of the second segment, one end of the bending segment is connected to the third segment, and the other end of the bending segment extends away from the body along the first direction.

[0014] Optionally, the second branch extends between the first segment and the second segment along the first direction, the first branch extends along a direction orthogonal to the first direction, the second branch is provided with a recess portion on a side thereof orthogonal to the first direction, the end of the third segment extends into the recess portion, and the third segment and the first branch are parallel to each other and arranged at intervals along the first direction.

[0015] Optionally, the end of the second segment is further provided with an extension portion, and the extension portion extends between the first branch and the body.

[0016] Optionally, the antenna further includes a second radiator, the second radiator is arranged on the dielectric substrate and electrically connected to the feeding port, and the second radiator is arranged at intervals from the first radiator.

[0017] The path length of the electric signal from the feed port to the second radiating body end is shorter than the path length of the electric signal from the feed port to the low-frequency stub end, and the path length of the electric signal from the feed port to the second radiating body end is different from the path length of the electric signal from the feed port to the high-frequency stub end.

[0018] Optionally, a through slot is formed in the second radiating body.

[0019] And / or, a bent stub is arranged at the end of the second radiating body away from the feed port to lengthen the path length of the electric signal from the feed port to the second radiating body end.

[0020] In a second aspect, the embodiments of the present application provide a communication device.

[0021] The communication device provided by the present application comprises the antenna described in any of the above embodiments.

[0022] It can be understood that the beneficial effects of the above-mentioned second aspect can be referred to the related description in the above-mentioned first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structural schematic diagram of the antenna provided by the first embodiment of the present application;

[0025] Figure 2 The structural schematic diagram of the antenna provided by the second embodiment of the present application;

[0026] Figure 3 The structural schematic diagram of the antenna provided by the third embodiment of the present application;

[0027] Figure 4 The structural schematic diagram of the antenna provided by the fourth embodiment of the present application;

[0028] Figure 5 The reflection coefficient schematic diagram of the antenna provided by the present application;

[0029] Figure 6 The radiation efficiency schematic diagram of the antenna provided by the present application in the frequency band of 800MHz-960MHz;

[0030] Figure 7A schematic diagram of the radiation efficiency of the antenna provided in the present application in the frequency band of 1710-2690 MHz.

[0031] In the drawings:

[0032] 100, antenna;

[0033] 10, dielectric substrate;

[0034] 20, feed port;

[0035] 30, first radiator; 31, body; 32, high-frequency branch; 321, first branch; 322, second branch; 3221, concave part; 33, low-frequency branch; 331, first section; 332, second section; 3321, reduced diameter section; 333, third section; 3331, bent section; 334, extension;

[0036] 40, second radiator; 41, through slot; 42, bent branch. DETAILED DESCRIPTION

[0037] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0041] Please refer to Figure 1 The antenna 100 provided by the embodiment of the present application will be described.

[0042] It should be noted that the first direction in the following is the x direction shown in the figure, and the second direction in the following is the y direction shown in the figure, and the second direction y is orthogonal to the first direction x.

[0043] The antenna 100 comprises a dielectric substrate 10 and a first radiator 30.

[0044] The dielectric substrate 10 is provided with a feed port 20, and the feed port 20 is adapted to be connected with a feed source. The material of the dielectric substrate 10 can include one or more materials with low dielectric constant, such as FR4 (epoxy resin-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic filled hydrocarbon material), etc.

[0045] As shown in Figure 1 , the feed port 20 is arranged on the surface of the dielectric substrate 10, and the feed port 20 can be a patch, via and the like structure containing metal material, and the feed port 20 is connected with the feed source so that the electrical signal in the feed source can be conducted into the feed port 20.

[0046] The first radiator 30 is arranged on the dielectric substrate 10, and the first radiator 30 comprises a body 31, a high-frequency branch 32 and a low-frequency branch 33. The body 31 is connected with the feed port 20 so that the feed port 20 inputs electrical signal to the body 31. The path length of the electrical signal conducted from the feed port 20 to the end of the high-frequency branch 32 is less than the path length of the electrical signal conducted from the feed port 20 to the end of the low-frequency branch 33. At least part of the low-frequency branch 33 extends to the side of the high-frequency branch 32 away from the body 31, and the end of the low-frequency branch 33 is coupled and connected with the high-frequency branch 32. 。

[0047] As shown in Figure 1 , the high-frequency branch 32 and the low-frequency branch 33 are both connected with the body 31. The high-frequency branch 32 extends away from the body 31 to form an end at the end of the high-frequency branch 32 away from the body 31. The low-frequency branch 33 extends away from the body 31 to form an end at the end of the low-frequency branch 33 away from the body 31. The body 31 is connected with the feed port 20 to conduct the electrical signal in the feed source into the first radiator 30 through the feed port 20. After entering the body 31, the electrical signal enters the high-frequency branch 32 and the low-frequency branch 33, that is, the electrical signal can be conducted from the feed port 20 to the end of the high-frequency branch 32 through the body 31, and the electrical signal can be conducted from the feed port 20 to the end of the low-frequency branch 33 through the body 31.

[0048] The low-frequency stub 33 extends along the first direction x away from the body 31 to the side of the high-frequency stub 32 away from the body 31, so that the high-frequency stub 32 is located between the body 31 and part of the low-frequency stub 33. The end of the low-frequency stub 33 extends along the first direction x toward the body 31, so that the end of the low-frequency stub 33 can be coupled with the high-frequency stub 32, thereby optimizing the coupling effect between the high-frequency stub 32 and the low-frequency stub 33 and enabling the antenna 100 to obtain better in-band matching characteristics in the high-frequency band.

[0049] Therefore, the low-frequency stub 33 extends to the side of the high-frequency stub 32 away from the main body 31, and both the low-frequency stub 33 and the high-frequency stub 32 are connected to the main body 31. That is, part of the low-frequency stub 33 is bent to the side of the high-frequency stub 32 away from the main body 31. By setting the bent low-frequency stub 33, the resonant frequency of the low-frequency stub 33 is reduced without increasing the size of the antenna 100, thereby reducing the reflection coefficient of the antenna 100 provided in this embodiment in the low-frequency band. Figure 5 As shown, the reflection coefficient of antenna 100 in the 800MHz-960MHz frequency band is less than -6dB.

[0050] The beneficial effects of the antenna 100 provided in this application embodiment are as follows: Compared with the prior art, the first radiator 30 of the antenna 100 provided in this application embodiment is provided with a high-frequency stub 32 and a low-frequency stub 33 respectively. At least part of the low-frequency stub 33 extends to the side of the high-frequency stub 32 away from the main body 31 to extend the path length of the electrical signal in the low-frequency stub 33. Thus, low-frequency radiation is achieved by setting the bent low-frequency stub 33, so that the antenna 100 provided in this application embodiment has a small size and can also achieve low-frequency radiation.

[0051] In addition, the end of the low-frequency stub 33 of the antenna 100 provided in this application embodiment is coupled to the high-frequency stub 32, which optimizes the coupling effect between the high-frequency stub 32 and the low-frequency stub 33, so that the antenna 100 can obtain better in-band matching characteristics in the high-frequency band, and optimize the impedance of the high-frequency stub 32 and the low-frequency stub 33, thereby improving the radiation efficiency of the antenna 100.

[0052] like Figure 6 As shown, the antenna 100 has a radiation efficiency of more than 36% in the low-frequency band of 800MHz-960MHz and a radiation efficiency of more than 56% in the band of 1710MHz-2690MHz. That is, the antenna 100 has achieved high radiation efficiency in both the high-frequency band and the low-frequency band.

[0053] In some embodiments provided in this application, there are multiple high-frequency stubs 32, including a first stub 321 and a second stub 322. The path length of the electrical signal from the power supply port 20 to the end of the first stub 321 is different from the path length of the electrical signal from the power supply port 20 to the end of the second stub 322.

[0054] like Figure 1 As shown, the resonant frequency of the first branch 321 with respect to the feed port 20 is different from that of the second branch 322 with respect to the feed port 20, thereby allowing the first branch 321 and the second branch 322 to radiate different high-frequency electromagnetic waves. Therefore, by setting the first branch 321 and the second branch 322 with different resonant frequencies, the number of high-frequency resonant points of the antenna 100 provided in this application is increased, thereby widening the high-frequency operating bandwidth of the antenna 100.

[0055] Therefore, by setting multiple high-frequency stubs 32, and ensuring that the resonant frequencies of these multiple high-frequency stubs 32 are all within the high-frequency band, the reflection coefficient of the antenna 100 provided in this embodiment of the application is reduced in the high-frequency band. Figure 7 As shown, the reflection coefficient of antenna 100 in the 1710MHz-2690MHz frequency band is less than -10dB.

[0056] In some embodiments provided in this application, the low-frequency stub 33 includes a first segment 331 extending along a first direction x and a second segment 332 extending along the first direction x. One end of the first segment 331 is connected to the body 31, and the other end of the first segment 331 extends to the side of the high-frequency stub 32 away from the body 31. One end of the second segment 332 is connected to the end of the first segment 331 away from the body 31, and the other end of the second segment 332 is coupled to the high-frequency stub 32.

[0057] like Figure 1 As shown, the first segment 331 is connected between the body 31 and the second segment 332. The end of the first segment 331 away from the body 31 and the end of the second segment 332 away from the body 31 are arranged along the second direction y, so that the low-frequency stub 33 has a bent structure. When the electrical signal enters the low-frequency stub 33 from the body 31, the electrical signal is first conducted away from the body 31 along the first direction x in the first segment 331, then the electrical signal enters the second segment 332 along the second direction y, and finally the electrical signal is conducted towards the body 31 along the first direction x in the second segment 332.

[0058] Therefore, by setting the bent low-frequency stub 33, low-frequency radiation can be achieved without increasing the size of the antenna 100. In some embodiments, such as... Figure 1As shown, the size of the antenna 100 is 56.0mm*25mm, so that the antenna 100 can be placed as a built-in skin antenna in various shells, which well overcomes the problem of oversize of the antenna in the prior art, so that the antenna provided by the embodiment of the application has small size and can also realize low-frequency radiation.

[0059] The second section 332 is connected to at least one of the first branch 321 and the second branch 322 at the end close to the body 31, so that the end of the low-frequency branch 33 is coupled to the high-frequency branch 32.

[0060] Therefore, the coupling capacitance between the low-frequency branch and the high-frequency branch is increased, so that the antenna 100 has good in-band matching characteristics in the high-frequency band, and the impedance of the high-frequency branch 32 and the low-frequency branch 33 is optimized, thereby improving the radiation efficiency of the antenna 100.

[0061] In some embodiments provided by the application, the second section 332 includes a plurality of reduced-diameter sections 3321, the plurality of reduced-diameter sections 3321 are arranged along the first direction x, and the widths of the plurality of reduced-diameter sections 3321 decrease successively along the direction close to the body 31.

[0062] As shown in the figure, Figure 1 the second section 332 includes a plurality of reduced-diameter sections 3321, the reduced-diameter sections 3321 extend along the first direction x, the width of the plurality of reduced-diameter sections 3321 is the size of the reduced-diameter sections 3321 in the second direction y, and the widths of the plurality of reduced-diameter sections 3321 decrease successively along the direction close to the body 31.

[0063] Therefore, in the process of conducting the electric signal along the first direction x in the second section 332, the impedance of the plurality of reduced-diameter sections 3321 increases successively in the direction of current conduction, so that the impedance matching effect of the second section 332 is optimized, the radiation efficiency of the low frequency is improved, and the bandwidth of the low frequency is widened.

[0064] In some embodiments provided by the application, the low-frequency branch 33 further includes a third section 333, one end of the third section 333 is connected to the end of the second section 332 close to the body 31, and the other end of the third section 333 extends along the second direction y towards the high-frequency branch 32, so that the end of the third section 333 is coupled to the high-frequency branch 32.

[0065] As shown in the figure, Figure 1As shown, the third section 333 is arranged at the end of the second section 332 close to the body 31, and extends along the second direction y, so that by arranging the third section 333, on one hand, the electric signal conducting path in the low-frequency branch 33 can be further increased, and on the other hand, the capacitive coupling between the third section 333 and the high-frequency branch 32 can make the antenna 100 have better in-band matching characteristics in the high-frequency section, and optimize the impedance of the high-frequency branch 32 and the low-frequency branch 33, thereby improving the radiation efficiency of the antenna 100.

[0066] In some embodiments provided by the present application, the third section 333 is provided with a bending section 3331 away from the end of the second section 332, one end of the bending section 3331 is connected with the third section 333, and the other end of the bending section 3331 extends away from the body 31 along the first direction x.

[0067] As shown in FIG. 3, Figure 1 the bending section 3331 is arranged at the end of the third section 333 away from the body 31, that is, the bending section 3331 is the terminal of the electric signal conducting path in the low-frequency branch 33, and by arranging the bending section 3331, the electric signal conducting path in the low-frequency branch 33 is further extended, so as to further reduce the resonant frequency of the low-frequency branch 33.

[0068] In some embodiments provided by the present application, the second branch 322 extends between the first section 331 and the second section 332 along the first direction x, the first branch 321 extends along the second direction y, the first branch 321 is provided with a recess portion 3221 on one side thereof along the second direction y, the end of the third section 333 extends into the recess portion 3221, and the third section 333 is parallel to the first branch 321 and is arranged in the first direction x.

[0069] As shown in FIG. 3, Figure 1 the end of the third section 333 is provided with the bending section 3331, that is, the bending section 3331 is arranged in the recess portion 3221, the low-frequency branch 33 is coupled with the second branch 322 through the third section 333, and the low-frequency branch 33 can also be coupled with the first branch 321 through the bending section 3331.

[0070] The bending section 3331 extends in the first direction x in the recess portion 3221, which can extend the length of the electric signal conducting path in the low-frequency branch 33, further reduce the resonant frequency of the low-frequency branch 33, and improve the radiation efficiency of the antenna 100 in the low-frequency section.

[0071] In some other embodiments provided by the present application, the end of the second section 332 is further provided with an extension portion 334, and the extension portion 334 extends between the first branch 321 and the body 31.

[0072] As shown in FIG. 3, Figure 2As shown, the extension 334 is located at one side of the second section 332 facing the body 31, one end of the extension 334 is connected with one end of the second section 332 facing the body 31, and the other end of the extension 334 extends to the space between the first branch 321 and the body 31 along the second direction y.

[0073] Therefore, on one hand, the extension 334 increases the conduction path length of the electric signal in the low-frequency branch 33, further reduces the resonant frequency of the low-frequency branch 33, and improves the radiation efficiency of the antenna 100 in the low-frequency band; on the other hand, the extension 334 couples the low-frequency branch 33 with the body 31 and the first branch 321, and improves the impedance matching effect of the low-frequency branch 33.

[0074] In some embodiments provided in the present application, the antenna 100 further comprises a second radiator 40, which is arranged on the dielectric substrate 10 and electrically connected with the feed port 20, and the second radiator 40 is arranged spaced apart from the first radiator 30.

[0075] As shown in the figure, Figures 1 to 4 the second radiator 40 is arranged at the side of the feed port 20 facing away from the first radiator 30, and the feed port 20 is connected with both the first radiator 30 and the second radiator 40, so that the electric signal in the feed port 20 can be conducted into the first radiator 30 and the second radiator 40, and at the same time excite the first radiator 30 and the second radiator 40 to emit electromagnetic waves.

[0076] The electric signal input into the first radiator 30 from the feed port 20 is opposite in phase to the electric signal input into the second radiator 40 from the feed port 20, so that the first radiator 30 and the second radiator 40 radiate in the same direction, and the gain of the antenna 100 is improved.

[0077] In some embodiments provided in the present application, the path length of the electric signal from the feed port 20 to the end of the second radiator 40 is smaller than the path length of the electric signal from the feed port 20 to the end of the low-frequency branch 33, and the path length of the electric signal from the feed port 20 to the end of the second radiator 40 is different from the path length of the electric signal from the feed port 20 to the end of the high-frequency branch 32.

[0078] As shown in the figure, Figure 1 the second radiator 40 extends along the second direction y, so that the length dimension of the second radiator 40 is similar to the length dimension of the first branch 321 in the second direction y, that is, the maximum conduction path length of the electric signal in the second radiator 40 is smaller than the maximum conduction path length of the electric signal in the low-frequency branch 33, and the resonant frequency of the second radiator 40 and the resonant frequency of the high-frequency branch 32 are both in the high-frequency band.

[0079] Thus, the second radiator 40 and the high-frequency branch 32 both radiate in the high-frequency band, and the resonant frequencies of the second radiator 40, the first branch 321 and the second branch 322 are different, which widens the bandwidth of the antenna 100 in the high-frequency band and improves the radiation efficiency of the antenna 100 in the high-frequency band.

[0080] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 4 , the first radiator 30 and the second radiator 40 are respectively arranged on two sides of the feed port 20 in the first direction.

[0081] In some other embodiments, as shown in Figure 2 , at least part of the first radiator 30 and at least part of the second radiator 40 are arranged in the second direction y, part of the first radiator 30 is connected to one side of the feed port 20 in the second direction y, and part of the second radiator 40 is connected to the other side of the feed port 20 in the second direction y.

[0082] In some embodiments provided in the present application, a through slot 41 is formed in the second radiator 40.

[0083] As shown in Figure 3 , the through slot 41 penetrates the second radiator 40 in the thickness direction of the second radiator 40, so that the second radiator 40 forms a hollow square structure. In some other embodiments, the second radiator 40 can also be a hollow ring structure.

[0084] Thus, on the one hand, the hollow structure of the second radiator 40 can improve the resonant frequency of the second radiator 40, and the bandwidth of the antenna 100 in the high-frequency band can be widened by adjusting the resonant frequency of the second radiator 40; on the other hand, the hollow structure of the second radiator 40 can change the impedance characteristics of the second radiator 40, so that the impedance of the second radiator 40 matches the impedance of the feed source.

[0085] In some embodiments provided in the present application, a bending branch 42 is arranged at the end of the second radiator 40 away from the feed port 20, so as to lengthen the path length of the electrical signal from the feed port 20 to the end of the second radiator 40.

[0086] As shown in Figure 4 , the bending branch 42 is arranged at the end of the second radiator 40 in the second direction y, so that the conduction path of the electrical signal of the feed source in the second radiator 40 can be lengthened by the bending branch 42, thereby reducing the resonant frequency of the second radiator 40 and widening the bandwidth of the antenna 100 in the high-frequency band.

[0087] In a second aspect, the embodiments of the present application provide a communication device.

[0088] The communication device provided in the present application comprises the antenna 100 in any of the above embodiments.

[0089] The antenna 100 provided in the present application has the advantages of small size and high radiation frequency, and the antenna 100 provided in the present application also has the advantage of good low-frequency radiation performance, so that the antenna 100 provided in the present application can meet the characteristic of small internal size of the communication device provided in the present application, and thus the communication device provided in the present application has the advantages of small size and high communication efficiency.

[0090] The above merely provides the preferred embodiments of the present application, but not for limiting the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna, characterized by The antenna comprises: a dielectric substrate, a feeding port being provided on the dielectric substrate, the feeding port being adapted to be connected to a feed source; a first radiator, the first radiator being provided on the dielectric substrate, the first radiator comprising a main body, a high-frequency branch and a low-frequency branch, the main body being connected to the feeding port so that the feeding port inputs an electric signal to the main body, a path length of the electric signal conducted from the feeding port to an end of the high-frequency branch being shorter than a path length of the electric signal conducted from the feeding port to an end of the low-frequency branch, at least a part of the low-frequency branch extending to a side of the high-frequency branch away from the main body, and the end of the low-frequency branch being connected to a coupling of the high-frequency branch.

2. The antenna of claim 1, wherein: The high-frequency branch has a plurality of high-frequency branches, the plurality of high-frequency branches comprising a first branch and a second branch, a path length of the electric signal conducted from the feeding port to an end of the first branch being different from a path length of the electric signal conducted from the feeding port to an end of the second branch.

3. The antenna of claim 2, wherein: The low-frequency branch comprises a first segment extending along a first direction and a second segment extending along the first direction, one end of the first segment being connected to the main body, the other end of the first segment extending to the side of the high-frequency branch away from the main body, one end of the second segment being connected to the end of the first segment away from the main body, and the other end of the second segment being connected to the coupling of the high-frequency branch.

4. The antenna of claim 3, wherein: The second segment comprises a plurality of reduced-diameter segments, the plurality of reduced-diameter segments being arranged along the first direction, and widths of the plurality of reduced-diameter segments decreasing in sequence along a direction close to the main body.

5. The antenna of claim 3, wherein: The low-frequency branch further comprises a third segment, one end of the third segment being connected to the end of the second segment close to the main body, and the other end of the third segment extending towards the high-frequency branch along a direction orthogonal to the first direction so that the end of the third segment is connected to the coupling of the high-frequency branch.

6. The antenna of claim 5, wherein: The end of the third segment away from the second segment is provided with a bending segment, one end of the bending segment being connected to the third segment, and the other end of the bending segment extending away from the main body along the first direction.

7. The antenna of claim 5, wherein: The second branch extends between the first segment and the second segment along the first direction, and the first branch extends along a direction orthogonal to the first direction, the second branch being provided with a recess portion on a side thereof orthogonal to the first direction, the end of the third segment extending into the recess portion, and the third segment being parallel to the first branch and arranged along the first direction.

8. The antenna of claim 7, wherein: The end of the second segment is further provided with an extension portion, the extension portion extending between the first branch and the main body.

9. The antenna of any one of claims 1-7, wherein, The antenna further comprises a second radiator, the second radiator being provided on the dielectric substrate and electrically connected to the feeding port, and the second radiator being arranged apart from the first radiator; a path length of the electric signal conducted from the feeding port to an end of the second radiator being shorter than the path length of the electric signal conducted from the feeding port to the end of the low-frequency branch, and the path length of the electric signal conducted from the feeding port to the end of the second radiator being different from the path length of the electric signal conducted from the feeding port to the end of the high-frequency branch.

10. The antenna of claim 9, wherein: The second radiator is provided with a through slot inside the second radiator; And / or, the second radiator is provided with a bending stub away from the end of the feed port, so as to prolong the path length of the electric signal from the feed port to the end of the second radiator.

11. A communication device, characterized by: An antenna comprising any one of the antennas of claims 1-10.

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