CN110931964A - Miniaturized MIMO multifrequency cell-phone antenna - Google Patents
Miniaturized MIMO multifrequency cell-phone antenna Download PDFInfo
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- CN110931964A CN110931964A CN201911018408.0A CN201911018408A CN110931964A CN 110931964 A CN110931964 A CN 110931964A CN 201911018408 A CN201911018408 A CN 201911018408A CN 110931964 A CN110931964 A CN 110931964A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Abstract
The application discloses a miniaturized MIMO multi-frequency mobile phone antenna, which comprises an antenna unit, a floor and a substrate; the antenna unit consists of a radiation unit and a feed structure; the floor is printed on the back of the substrate; the edge of the substrate is provided with a convex structure; the radiation unit is printed on the outer side surface of the convex structure; the feed structure consists of a first branch and a second branch, the first branch is printed on the inner side surface of the convex structure, the first branch is connected with one end of the second branch, and the other end of the second branch is connected with the floor; the first branch is flush with one end of the radiation unit; the floor is provided with a defected ground structure, and the defected ground structure is arranged on the other side, opposite to the first branch, of the second branch. The antenna provided by the application can generate three resonance points of 2.5GHz, 3.5GHz and 4.9GHz by changing the structure of the antenna unit, and further can cover 6 frequency bands including LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz, thereby solving the problem that the prior art can not cover the 4G/5G network frequency band at the same time in a pair of antennas.
Description
Technical Field
The application relates to the technical field of antennas, in particular to a miniaturized MIMO multi-frequency mobile phone antenna.
Background
Along with the improvement of the life quality of people, higher requirements are put forward on a wireless mobile communication system and a mobile phone. However, the current mobile communication technology faces the problems of spectrum resource shortage, system capacity and the like, and is far from meeting the requirement of future mobile interconnection. Therefore, the development of the fifth generation (5G) mobile communication technology has been proposed. At present, the commercialization of 5G is imminent, and the research and development thereof are rapidly promoted due to the rapid development of mobile internet services and unlimited internet of things services. Compared with the 4G and 5G communication of the previous generation, the flow density, the transmission rate and the number of the connected terminal devices are greatly improved.
In the design of the current 5G antenna, most of the design is oriented to the millimeter wave frequency band, and the MIMO antenna which is first deployed in china and simultaneously covers three frequency bands of 3.3-3.6GHz, 4.8-5GHz and 2515MHz-2675MHz is rarely involved, and most of the design is oriented to a single frequency band antenna applied to a single 5G frequency band.
At present, a terminal antenna for 5G generally adopts a 2G/3G/4G design as a pair of antennas, and another antenna is designed in a single 5G frequency band, so that two antennas need to be placed at the same time, a high-order mode generated by one low-frequency antenna is easy to cause coupling influence on another 5G antenna, and thus, the channel capacity is reduced, and the problem of large occupied space due to the arrangement of the two antennas is solved.
Disclosure of Invention
The application aims to provide a miniaturized MIMO multi-frequency mobile phone antenna, which solves the problems that the existing antenna can not cover a 4G/5G network frequency band at one antenna simultaneously, so that the coverage frequency band is single or a plurality of antennas are arranged, so that the occupied space is large and the channel capacity is low.
In view of the above, the present application provides a miniaturized MIMO multi-band mobile phone antenna, which includes an antenna unit, a floor, and a substrate; the antenna unit consists of a radiation unit and a feed structure;
the floor board is printed on the back surface of the substrate;
the edge of the substrate is provided with a convex structure;
the radiation unit is printed on the outer side face of the protruding structure;
the feeding structure consists of a first branch and a second branch, the first branch is printed on the inner side surface of the protruding structure, the first branch is connected with one end of the second branch, and the other end of the second branch is connected with the floor;
the first branch is flush with one end of the radiation unit;
the floor is provided with a defected ground structure, and the defected ground structure is positioned on the other side, opposite to the first branch, of the second branch.
Optionally, the number of the antenna units is 8.
Furthermore, 6 of the antenna units are respectively arranged in the length direction of the substrate, and 2 of the antenna units are arranged in the width direction of the substrate.
Optionally, the radiation unit is a C-shaped structure formed by sequentially connecting a first rectangle, a second rectangle, a third rectangle, a fourth rectangle, and a fifth rectangle.
Further, the length of the first rectangle is 3mm, the length of the second rectangle and the fourth rectangle is 3.8mm, the length of the third rectangle is 16.5mm, the length of the fifth rectangle is 3.5mm, and the width of the first rectangle, the width of the second rectangle, the width of the third rectangle, the width of the fourth rectangle and the width of the fifth rectangle are all 1.5 mm.
Optionally, the first branch is formed by an -shaped structure formed by sequentially connecting a sixth rectangle, a seventh rectangle and an eighth rectangle; and the second branch is in an L-shaped structure formed by connecting a ninth rectangle and a tenth rectangle.
Further, the sixth rectangle is 15.5mm long and 1.5mm wide, the seventh rectangle is 1.5mm long and 1.5mm wide, and the eighth rectangle is 3.5mm long and 0.8mm wide.
Optionally, the defected ground structure is rectangular.
Further, the defected ground structure is 10mm long and 4mm wide.
Optionally, the defected ground structure is at a distance of 2mm from one end of the radiation unit.
Compared with the prior art, the embodiment of the application has the advantages that:
in the embodiment of the application, a miniaturized MIMO multi-frequency mobile phone antenna is provided, which comprises an antenna unit, a floor and a substrate; the antenna unit consists of a radiation unit and a feed structure; wherein the floor is printed on the back side of the substrate; the edge of the substrate is provided with a convex structure; the radiation unit is printed on the outer side face of the protruding structure; the feeding structure consists of a first branch and a second branch, the first branch is printed on the inner side surface of the protruding structure, the first branch is connected with one end of the second branch, and the other end of the second branch is connected with the floor; the first branch is flush with one end of the radiation unit; the floor is provided with a defect ground structure, and the defect ground structure is arranged on the other side, opposite to the first branch, of the second branch.
The miniaturized MIMO multi-frequency mobile phone antenna provided by the embodiment of the application has the advantages that the defected ground structure is arranged on the floor, and the feed structure and the radiation unit are respectively arranged on the inner side surface and the outer side surface of the raised structure at the edge of the substrate, so that the antenna unit can generate current distribution of a loop antenna mode and a dipole antenna mode when the antenna unit is at three resonant working points of 2.5GHz, 3.5GHz and 4.9GHz, and further can cover 6 frequency bands including LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz when the return loss is less than-6 dB, and the 4G/5G network frequency band can be covered by arranging a pair of antennas, so that not only can the multi-frequency band be covered, but also the channel capacity is high and the.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a miniaturized MIMO multi-band mobile phone antenna according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an antenna unit according to an embodiment of the present application;
fig. 3 is a front view of a radiating element provided by an embodiment of the present application;
fig. 4 is a front view of a first branch of a feeding structure provided in an embodiment of the present application;
fig. 5a is a current distribution of the antenna unit provided in the embodiment of the present application in a 2.5GHz band;
fig. 5b is a current distribution of the antenna unit provided in the embodiment of the present application in the 3.5GHz band;
fig. 5c is a current distribution of the antenna unit provided in the embodiment of the present application in the 4.9GHz band;
fig. 6 is a schematic diagram of an S parameter of an antenna unit according to an embodiment of the present application;
fig. 7a is a schematic view of an antenna unit provided in the embodiment of the present application in a 2.5GHz direction;
fig. 7b is a schematic diagram of an antenna unit provided in the embodiment of the present application in a direction of 3.5 GHz;
fig. 7c is a schematic diagram of an antenna unit provided in the embodiment of the present application in a direction of 4.9 GHz;
fig. 8 is a schematic diagram of S parameters of a miniaturized MIMO multi-band mobile phone antenna according to an embodiment of the present application;
fig. 9 is a schematic isolation diagram of a miniaturized MIMO multi-band mobile phone antenna according to an embodiment of the present application;
fig. 10 is a gain diagram of an antenna unit according to an embodiment of the present application;
reference numerals: 1. an antenna unit; 2. a floor; 3. a substrate; 4. a substrate edge protrusion structure; 5. a defected ground structure; 6. a radiation unit; 7. a feed structure; 8. a first rectangle; 9 a second rectangle; 10. a third rectangle; 11. a fourth rectangle; 12 a fifth rectangle; 13. a sixth rectangle; 14 seventh rectangle; 15. an eighth rectangle; d1, length of base plate 150 mm; d2, the width of the base plate is 80 mm; d3, the distance between the two antenna units in the length direction is 48.5 mm; d4, the distance between the two antenna units in the length direction is 35.6 mm; d5, the distance from the antenna element in the width direction to one end of the substrate is 9 mm.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic diagram of a miniaturized MIMO multi-band mobile phone antenna structure according to an embodiment of the present invention.
The application designs a miniaturized MIMO multifrequency cell-phone antenna, including antenna element 1, floor 2, base plate 3, antenna element comprises radiating element 6, feed structure 7.
The floor 1 is arranged on the back of the substrate 3, the edge of the substrate 3 is provided with the protruding structure 4 as a side substrate, the radiation unit 6 is arranged outside the side substrate, the first branch of the feed structure 7 is arranged inside the side substrate, one end of the second branch of the feed structure 7, namely the microstrip feed line, is connected with the first branch, the other end of the second branch is connected with the floor and is used for being welded with the SMA port, and the floor on one side of the second branch is also provided with the rectangular defected ground structure 5.
The floor 2 is a mobile phone system floor, which is a ground plane required by other electronic components except for an antenna, the substrate 3 is a mobile phone system substrate, other electronic components and batteries are arranged above the mobile phone system substrate except for a bearing antenna, the feed structure 7 is used for feeding the antenna unit, the antenna unit 1 performs feed work in a double-sided double-strip line feed mode, when the antenna unit 1 works in a 3.5GHz frequency band, a first branch of the feed structure 7 and the radiation unit 6 jointly act to form current distribution of a dipole antenna mode, the common action of the defected ground structure 5 and the radiation unit enables the current distribution of the antenna unit to form the current distribution of the loop antenna mode, and the radiation unit 6 is a main radiation part of the antenna unit 1 and participates in radiation in all frequency bands.
It can be understood that an antenna element 1 is composed of a radiation element 6, a feed structure 7, a floor 2 and a rectangular defected ground structure 5 arranged on the floor, the antenna element 1 can independently complete the receiving and transmitting work of signals, and the floor 2 and the substrate 3 are the common structure of the antenna elements.
Referring to fig. 5a, 5b, and 5c, fig. 5a, 5b, and 5c are schematic current distributions of the antenna unit 1 in the operating frequency bands of 2.5GHz, 3.5GHz, and 4.9GHz, respectively.
As can be known from fig. 5a, 5b, and 5c, the current distribution diagrams of the resonance points of the antenna unit 1 at 2.5GHz, 3.5GHz, and 4.9GHz, when the antenna unit 1 operates near 2.5GHz, the current distribution of the antenna unit 1 is the current distribution of the loop antenna mode, in which the antenna unit 1 can cover LTE2300 and LTE2500 required for 4G communication, and the low frequency band 2515MHz to 2675MHz required for 5G communication; when the antenna unit 1 works near 3.5GHz, the current distribution of the antenna unit 1 is the current distribution of a dipole antenna mode, and under the dipole antenna mode, the antenna unit 1 can cover a middle frequency band 3.3GHz-3.6GHz required by 5G communication; when the antenna unit 1 operates at 4.9GHz, the current distribution of the antenna unit 1 is the same as that of the antenna unit 1 operating at 2.5GHz, and is the current distribution of a loop antenna mode, which is a higher order mode of the loop antenna mode, and in the loop antenna mode, the antenna unit 1 can cover a high frequency band 4.8GHz-5.0GHz required for 5G communication.
Referring to fig. 6, fig. 6 is a schematic diagram of S parameters of an antenna unit.
Fig. 6 is a schematic return loss diagram of an antenna unit 1, where the ordinate axis of the coordinate is return loss, and the abscissa axis is an operating frequency band of the antenna unit, it can be understood that, when the return loss is less than-6 dB, the antenna unit conforms to matching of a radio frequency circuit of a mobile phone in practical application, and it can be known from fig. 6 that, when the antenna unit operates in 6 frequency bands of LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz, and 4.8GHz-5.0GHz, the return loss of the antenna unit 1 is less than-6 dB, that is, the antenna unit can cover the operating frequency band required by a 4G/5G network.
Referring to fig. 10, fig. 10 is a schematic diagram illustrating gain parameters of the antenna unit 1.
The gain parameter of the antenna unit 1 represents the ratio of the power density of signals generated by the antenna unit 1 at the same point in space between an actual antenna unit and an ideal antenna unit under the condition that the input power is equal, and the higher the gain is, the higher the radio wave transmission is under the same conditionThe further the distance is. As can be known from FIG. 10, when the antenna unit 1 works in 6 frequency bands of LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz, the gain of the antenna unit is greater than 0dBiThat is, the antenna unit 1 can propagate radio waves in the above 6 frequency bands, so that the antenna unit can cover the operating frequency band required by the 4G/5G network.
Referring to fig. 7a, 7b, and 7c, fig. 7a, 7b, and 7c show the directional diagrams of the antenna unit 1 in the operating frequency bands of 2.5GHz, 3.5GHz, and 4.9 GHz.
As can be seen from fig. 7a, 7b, and 7c, the antenna unit 1 is an omni-directional antenna, and it can be understood that the antenna unit 1 can receive and transmit signals in all directions.
By combining the return loss diagrams (fig. 7a, 7b and 7c) of the antenna unit 1 and the gain diagram (fig. 10) of the antenna unit 1, it can be known that when the antenna unit 1 works in 6 frequency bands of LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and more than 4.8GHz-5.0GHz, the return loss parameters and the gain parameters both meet the working requirements of the antenna in a 4G/5G network.
The miniaturized MIMO multi-frequency mobile phone antenna provided by the embodiment has the advantages that the defected ground structure 5 is arranged on the floor 2, and the feed structure 7 and the radiation unit 6 are respectively arranged on the inner side and the outer side of the convex structure 4 of the substrate 3, so that the antenna unit 1 can generate current distribution of a loop antenna mode and a dipole antenna mode at three resonant working points of 2.5GHz, 3.5GHz and 4.9GHz, and further can cover 6 frequency bands including LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz when the return loss is less than-6 dB, and the problem that the occupied space generated by two antennas is large due to the fact that one antenna can not cover a 4G/5G network frequency band at the same time in the prior art is solved.
Preferably, the number of the antenna units 1 is 8, of which 6 are respectively arranged in the length direction of the substrate 3 and 2 are respectively arranged in the width direction of the substrate 3; three antenna units are sequentially arranged on one side of the protruding structure 4 of the substrate 3 in the length direction, the distance between the first antenna unit and the second antenna unit is 35.6mm, the distance between the second antenna unit and the third antenna unit is 48.5mm, three antenna units are sequentially arranged on the other side of the protruding structure 3 of the substrate in the length direction, the distance between the fourth antenna unit and the fifth antenna unit is 20.5mm, and the distance between the fifth antenna unit and the sixth antenna unit is 34 mm; one side of the substrate protruding structure 4 in the width direction is provided with an antenna unit, the distance between the antenna unit and one end in the width direction is 9mm, and the antenna unit on the other side in the width direction is symmetrically arranged.
It can be understood that the directional diagram of each antenna unit in operation will cause coupling influence on the directional diagram of another antenna unit, and influence the isolation of the antenna units, thereby reducing the channel capacity, and it can be known that the working requirements of the mobile phone antenna are met when the isolation of the antenna units is below-10 dB.
Fig. 9 is a schematic diagram of isolation of 8 antenna units on a miniaturized MIMO multi-frequency mobile phone antenna, for example, S15 is the isolation of a first antenna unit and a fifth antenna unit, that is, the coupling effect of two antenna units, and it can be known from fig. 9 that the isolation of 8 antenna units is less than-10 dB in 6 frequency bands above LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz, and 4.8GHz-5.0GHz, and in the prior art standard, the isolation less than-10 dB meets the requirement of mobile phone antenna performance parameters, that is, 8 antenna units can independently operate in a 4G/5G frequency band, and the coupling effect between 8 antenna units also meets the requirement of mobile phone antenna performance parameters.
Fig. 8 is a schematic diagram of S parameters of a miniaturized MIMO multi-band mobile phone antenna, for example, S11 is the return loss of the first antenna unit, and it can be known from fig. 8 that the return loss of 8 antenna units is less than-6 dB in 6 frequency bands of LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz, and 4.8GHz-5.0GHz, so that the return loss of 8 antenna units meets the performance parameter requirements of the mobile phone antenna.
Specifically, the radiation unit is a C-shaped structure formed by sequentially connecting a first rectangle 8, a second rectangle 9, a third rectangle 10, a fourth rectangle 11 and a fifth rectangle 12.
Further, the length of the first rectangle 8 is 3mm, the lengths of the second rectangle 9, the fourth rectangle 11 are 3.8mm, the length of the third rectangle 10 is 16.5mm, and the length of the fifth rectangle 12 is 3.5mm, and the widths of the first rectangle 8, the second rectangle 9, the third rectangle, the fourth rectangle, and the fifth rectangle are all 1.5mm, it can be understood that the setting of the shape, the structure, and the size of the radiating element will all affect the distribution of the current, and the current distribution of the antenna element 1 will change along with the change of the shape and the size of the radiating element 6, so as to affect the parameters of the antenna element 1, such as the return loss, the gain, and the like.
Specifically, the first branch of the feed structure 7 is formed by an -shaped structure formed by sequentially connecting a sixth rectangle 13, a seventh rectangle 14 and an eighth rectangle 15; the second branch is in an L-shaped structure formed by connecting a ninth rectangle and a tenth rectangle.
Further, the sixth rectangle 13 is 15.5mm long and 1.5mm wide, the seventh rectangle 14 is 1.5mm long and 1.5mm wide, and the eighth rectangle 15 is 3.5mm long and 0.8mm wide, it can be understood that the shape, structure and size of the feed structure 7 have an influence on the distribution of the current, and further influence parameters such as return loss and gain of the antenna unit 1; the second branch of the feed structure 7 is a microstrip feed line, the length of the microstrip feed line can be set as required, the width is calculated by a microstrip linear impedance calculation formula to be about 1mm, the microstrip linear impedance calculation formula is the prior art and is not repeated here, that is, the lengths of the ninth rectangle and the tenth rectangle are determined according to actual conditions, and the width is calculated.
The first rectangle to the eighth rectangle are artificially arranged to facilitate clear description of the shapes and sizes of the radiation element and the feed structure, and it is understood that the radiation element and the feed structure are not composed of the rectangular structure.
Specifically, the defected ground structures 5 are rectangular, and one defected ground structure 5 is provided for each antenna unit 1.
Further, the length of the defected ground structure 5 is 10mm, the width thereof is 4mm, the distance between the defected ground structure 5 and one end of the radiation unit 6 is 2mm, it can be understood that, in the length direction of the substrate 3, the defected ground structure 5 is disposed on the side of the feeding second branch relative to the first branch, and the horizontal distance between the defected ground structure 5 and one end of the radiation unit 6 in the length direction of the substrate 3 is 2 mm.
Finally, the miniaturized MIMO multi-frequency mobile phone antenna provided by the embodiment of the application is characterized in that the floor is provided with the defected ground structure, and the inner side surface and the outer side surface of the raised structure at the edge of the substrate are respectively provided with the feed structure and the radiation unit, so that the current distribution of the loop antenna mode and the dipole antenna mode can be generated when 8 antenna units are at three resonant working points of 2.5GHz, 3.5GHz and 4.9GHz, further 6 frequency bands including LTE2300, LTE2500, WLAN, 2515MHz-2675MHz, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz can be covered when the return loss is less than-6 dB, and the isolation of the 8 antenna units at the above 6 frequency bands meets the standard requirement of the mobile phone antenna, the 4G/5G network frequency band can be covered by arranging one antenna, the multi-frequency band can be covered, the channel capacity is high, the occupied space is only 0.1625 wavelength, and the problem that the 4G/5G network frequency band cannot be covered by one antenna in The two antennas generate the problems of large occupied space and low channel capacity.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A miniaturized MIMO multi-frequency mobile phone antenna is characterized by comprising an antenna unit, a floor and a substrate; the antenna unit consists of a radiation unit and a feed structure;
the floor board is printed on the back surface of the substrate;
the edge of the substrate is provided with a convex structure;
the radiation unit is printed on the outer side face of the protruding structure;
the feeding structure consists of a first branch and a second branch, the first branch is printed on the inner side surface of the protruding structure, the first branch is connected with one end of the second branch, and the other end of the second branch is connected with the floor;
the first branch is flush with one end of the radiation unit;
the floor is provided with a defected ground structure, and the defected ground structure is positioned on the other side, opposite to the first branch, of the second branch.
2. The miniaturized MIMO multi-band handset antenna of claim 1, wherein the number of antenna elements is 8.
3. The antenna of claim 2, wherein 6 of the antenna units are disposed in the length direction of the substrate and 2 of the antenna units are disposed in the width direction of the substrate.
4. The antenna of claim 1, wherein the radiating element has a C-shaped structure formed by sequentially connecting a first rectangle, a second rectangle, a third rectangle, a fourth rectangle, and a fifth rectangle.
5. The miniaturized MIMO multi-band handset antenna of claim 4, wherein the first rectangle is 3mm long, the second and fourth rectangles are 3.8mm long, the third rectangle is 16.5mm long, the fifth rectangle is 3.5mm long, and the widths of the first, second, third, fourth and fifth rectangles are all 1.5 mm.
6. The miniaturized MIMO multi-band handset antenna of claim 1, wherein the first branch is formed in shape by connecting a sixth rectangle, a seventh rectangle, and an eighth rectangle in sequence; and the second branch is in an L-shaped structure formed by connecting a ninth rectangle and a tenth rectangle.
7. The miniaturized MIMO multi-band handset antenna of claim 6, wherein the sixth rectangle is 15.5mm long and 1.5mm wide, the seventh rectangle is 1.5mm long and 1.5mm wide, and the eighth rectangle is 3.5mm long and 0.8mm wide.
8. The miniaturized MIMO multi-band handset antenna of claim 1, wherein the defected ground structure is rectangular.
9. The miniaturized MIMO multi-band handset antenna of claim 8, wherein the defected ground structure has a length of 10mm and a width of 4 mm.
10. The miniaturized MIMO multi-band handset antenna of claim 1, wherein the defected ground structure is spaced from one end of the radiating element by 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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