CN110098484B - Small-sized multi-frequency antenna and terminal - Google Patents
Small-sized multi-frequency antenna and terminal Download PDFInfo
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- CN110098484B CN110098484B CN201910414767.1A CN201910414767A CN110098484B CN 110098484 B CN110098484 B CN 110098484B CN 201910414767 A CN201910414767 A CN 201910414767A CN 110098484 B CN110098484 B CN 110098484B
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- 230000005404 monopole Effects 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 36
- 230000002950 deficient Effects 0.000 claims abstract description 27
- 230000007547 defect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Classifications
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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
- H01Q1/48—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
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
Abstract
The invention discloses a small-sized multi-frequency antenna and a terminal, wherein the small-sized multi-frequency antenna comprises: two branch feed monopoles, a floor, a substrate and a reconfigurable switch; the feeding monopole is printed on the front surface of the substrate, the floor is printed on the back surface of the substrate, the floor is provided with a defective ground structure, the feeding monopole comprises a feeding unit, an upper branch unit and a lower branch unit, the feeding unit is provided with a feeding point, and the lower branch of the feeding monopole is provided with a reconfigurable switch; according to the invention, the frequency band required by 3G is generated by utilizing the defective ground structure on the floor, the frequency bands required by 4G and 5G are generated by utilizing the two radiation branches of the feed monopole, and the upper frequency band required by 5G is generated by reconstructing the lower branch, so that one antenna can cover the frequency bands required by 3G, 4G and 5G at the same time, and the occupied area of the antenna in the terminal is reduced; the influence among a plurality of antennas is avoided, and the channel capacity is improved.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a small-sized multi-frequency antenna and a terminal.
Background
With the improvement of life quality of people, higher requirements are put on a wireless mobile communication system and a mobile phone. The current mobile communication technology faces the problems of shortage of spectrum resources, limited system capacity and the like, and the requirements of future mobile interconnection are far from being met. Therefore, the development of the fifth generation (5G) mobile communication technology has raised a schedule. Currently, the commercial use of 5G has been eager, and the development of the same is rapidly being promoted due to the rapid development of mobile internet service and unlimited internet of things service. Compared with the 4G,5G communication of the previous generation, the traffic density, the transmission rate and the number of connected terminal devices are greatly improved.
In the current design of 5G antennas, most of the design is directed to millimeter wave frequency bands, but the two frequency bands of 3.3-3.6GHz and 4.8-5GHz which are deployed in China first are rarely involved, and most of the design is a single frequency band antenna which is directed to single 5G frequency band application, and if the design does not cover low frequency bands, the application area of a terminal product is narrow, and the requirements of people cannot be met.
In the prior art, a terminal antenna facing 5G is generally designed to be one antenna by adopting 2G/3G/4G, and the other antenna is designed to be the single 5G frequency band. Therefore, two antennas need to be placed, and as two antennas need to be placed, the occupied area of the antennas is too large for a small terminal, and the space reserved for other electronic elements is necessarily reduced; and a low-frequency band antenna is designed for 2G/3G/4G, and the generated high-order mode can cause coupling influence on another 5G antenna, so that the channel capacity is reduced.
Therefore, how to provide a miniaturized multi-frequency antenna capable of covering both 5G frequency band and low frequency band, reducing the antenna occupation area in a small terminal, and improving the channel capacity is a problem to be solved.
Disclosure of Invention
The invention aims to provide a small multi-frequency antenna and a terminal, which are used for simultaneously covering 3G, 4G and 5G frequency bands by using one antenna, so that the occupied area of the antenna in the small terminal is reduced, and the channel capacity is improved.
In order to solve the above technical problems, the present invention provides a small-sized multi-frequency antenna, comprising: two branch feed monopoles, a floor, a substrate and a reconfigurable switch;
the feeding monopole is printed on the front surface of the substrate, the floor is printed on the back surface of the substrate, the floor is provided with a defective ground structure, the feeding monopole comprises a feeding unit, an upper branch unit and a lower branch unit, the feeding unit is provided with a feeding point, and the lower branch of the feeding monopole is provided with the reconfigurable switch; the defective ground structure is used for generating a UMTS frequency band, the feed monopole is used for generating an LTE2300 frequency band, an LTE2500 frequency band and a 3.3GHz-3.6GHz frequency band by using two branches, and generating a 4.8GHz-5.0GHz frequency band by using reconstruction of a lower branch.
Optionally, part of the upper branch unit is relatively covered in the defective floor structure of the floor.
Optionally, the feeding unit is a first rectangle, the upper branch unit is an L-shaped bent branch formed by a second rectangle and a third rectangle, and the lower branch power supply is a hook-shaped bent branch formed by a fourth rectangle, a fifth rectangle and a sixth rectangle;
the first short side of the first rectangle is parallel to a preset side of the floor with a defective ground structure and is arranged right above the preset side, the first rectangle is connected with the second rectangle and the fourth rectangle, the second rectangle is connected with the third rectangle, the fifth rectangle is connected with the fourth rectangle and the sixth rectangle, the second short side of the first rectangle, the first long side of the second rectangle and the fourth rectangle and the first short side of the third rectangle and the first short side of the fifth rectangle are all on the same straight line, and the second short side of the fifth rectangle and one side of the sixth rectangle are on the same straight line; the reconfigurable switch is arranged in the third rectangle, and part of the fifth rectangle and all or part of the sixth rectangle are oppositely covered in the defective ground structure of the floor.
Optionally, the feeding point is disposed at a first short side of the first rectangle.
Optionally, the length of the first rectangle is equal to the length of the third rectangle.
Optionally, the length and width of the defective ground structure of the floor are 14mm and 11mm, the sum of the width of the first rectangle, the third rectangle and the fifth rectangle and the length of the second rectangle and the fourth rectangle is 19mm, the length of the fifth rectangle is 6.2mm, the length of the first rectangle and the third rectangle is 4.8mm, the width of the first rectangle, the second rectangle, the third rectangle, the fourth rectangle and the sixth rectangle is 1mm, the width of the fifth rectangle is 2.3mm, the length of the second rectangle is 5mm, the length of the sixth rectangle is 1.7mm, and the distance between the first long side of the fifth rectangle and the first short side of the sixth rectangle from one short side of the defective ground structure is 10mm and 6mm, respectively; the second long side of the fifth rectangle is connected with the second short side of the sixth rectangle, and the second short side of the fifth rectangle and the first long side of the sixth rectangle are on the same straight line.
Optionally, the reconfigurable switch is disposed in the third rectangle at a distance of 2.4mm from the first short side.
Optionally, an edge of the floor opposite to the preset edge is overlapped with an edge of the substrate, the length of the floor is equal to that of the substrate, and the width of the floor is smaller than that of the substrate.
Optionally, the thickness of the substrate is 0.8mm.
In addition, the invention also provides a terminal, which comprises: a compact multifrequency antenna according to any preceding claim.
The invention provides a small-sized multi-frequency antenna, which comprises: two branch feed monopoles, a floor, a substrate and a reconfigurable switch; the feeding monopole is printed on the front surface of the substrate, the floor is printed on the back surface of the substrate, the floor is provided with a defective ground structure, the feeding monopole comprises a feeding unit, an upper branch unit and a lower branch unit, the feeding unit is provided with a feeding point, and the lower branch of the feeding monopole is provided with a reconfigurable switch; the defect ground structure is used for generating a UMTS frequency band, the feed monopole is used for generating an LTE2300 frequency band, an LTE2500 frequency band and a 3.3GHz-3.6GHz frequency band by using two branches, and generating a 4.8GHz-5.0GHz frequency band by using reconstruction of a lower branch;
therefore, the invention utilizes the defect ground structure on the floor to generate the frequency band (UMTS) required by 3G, utilizes the two radiation branches of the feed monopole to generate the frequency band (LTE 2300 and LTE 2500) required by 4G and the frequency band (3.3 GHz-3.6 GHz) required by 5G, and the reconstruction of the lower branch to generate the upper frequency band (4.8 GHz-5.0 GHz) required by 5G, so that one antenna can cover the frequency bands required by 3G, 4G and 5G simultaneously, thereby reducing the occupied area of the antenna in the terminal; the influence among a plurality of antennas is avoided, and the channel capacity is improved. In addition, the invention also provides a terminal which has the same beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a small multi-frequency antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a feeding monopole of a small-sized multi-frequency antenna according to an embodiment of the present invention;
fig. 3 is a top view of another small-sized multi-frequency antenna according to an embodiment of the present invention;
fig. 4 is a side view of the compact multi-frequency antenna of fig. 3;
fig. 5 is an enlarged view of a portion of the compact multi-frequency antenna of fig. 3;
fig. 6 is a schematic diagram of current distribution of the small multi-frequency antenna in fig. 3 in different frequency bands;
fig. 7 is a schematic diagram of S parameter of the small-sized multi-frequency antenna in fig. 3;
fig. 8 is a pattern at 1.9GHz of the compact multi-frequency antenna of fig. 3;
fig. 9 is a diagram of the small multi-frequency antenna of fig. 3 at 2.5 GHz;
fig. 10 is a pattern at 3.5GHz of the compact multi-frequency antenna of fig. 3;
fig. 11 is a diagram of the small multi-frequency antenna of fig. 3 at 4.9 GHz.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a small multi-frequency antenna according to an embodiment of the invention. The small-sized multi-frequency antenna may include: two-branch feed monopole 10, floor 20, substrate 30 and reconfigurable switch 40;
wherein, the feed monopole 10 is printed on the front surface of the substrate 30, the floor 20 is printed on the back surface of the substrate 30, the floor 20 is provided with a defective ground structure, the feed monopole 10 comprises a feed unit, an upper branch unit and a lower branch unit, the feed unit is provided with a feed point 11, and the lower branch of the feed monopole 10 is provided with a reconfigurable switch 40; the defective ground structure is used to generate UMTS bands, the feed monopole 10 is used to generate LTE2300 bands, LTE2500 bands, and 3.3GHz-3.6GHz bands using two branches, and 4.8GHz-5.0GHz bands using reconstruction of the lower branches.
Specifically, the feed monopole 10 in this embodiment may be a metal antenna sheet with two radiating branches (an upper branch and a lower branch) printed on the front surface of the substrate 30, and the floor 20 may be a metal ground with a defective ground structure printed on the back surface of the substrate 30. In this embodiment, the feeding monopole 10 and the floor board 20 printed on the opposite sides of the substrate 30 may not have a relatively covered portion, i.e., the feeding monopole 10 and the floor board 20 may not be covered when projected onto the plane of the substrate 30.
It will be appreciated that the purpose of this embodiment may be to use the defective ground structure on the floor 20 to generate the frequency band (UMTS) required for 3G, use the two radiating branches of the feed monopole 10 to generate the frequency bands required for 5G (LTE 2300 and LTE 2500) and the frequency band required for 5G (3.3 GHz-3.6 GHz), and use the reconstruction of the lower branch to generate the upper frequency band required for 5G (4.8 GHz-5.0 GHz), so that the small multi-frequency antenna may cover the frequency bands required for 3G, 4G and 5G (UMTS, LTE2300, LTE2500, 3.3GHz-3.6GHz and 4.8GHz-5.0 GHz) simultaneously.
Specifically, for the specific arrangement positions of the feeding monopole 10 and the floor board 20 printed on the front and back sides of the substrate 30 in this embodiment, the arrangement positions can be set by a designer according to the practical situation and the user requirements, as shown in fig. 1, in order to reduce the size of the substrate 30, part of the upper branch units of the feeding monopole 10 can be relatively covered in the defective ground structure of the floor board 20. The present embodiment is not limited in any way as long as the purpose of covering the 3G, 4G, and 5G frequency bands can be achieved.
Specifically, as shown in fig. 2, the feeding unit may be a first rectangle 12, the upper branch unit may be an L-shaped bent branch formed by a second rectangle 13 and a third rectangle 14, and the lower branch power supply may be a hook-shaped bent branch formed by a fourth rectangle 15, a fifth rectangle 16 and a sixth rectangle 17; wherein, the first short side of the first rectangle 12 is parallel to the preset side of the floor 20 with the defected ground structure and is arranged right above the preset side, the first rectangle 12 is connected with the second rectangle 13 and the fourth rectangle 15, the second rectangle 13 is connected with the third rectangle 14, the fifth rectangle 16 is connected with the fourth rectangle 15 and the sixth rectangle 17, the second short side of the first rectangle 12, the first long side of the second rectangle 13 and the fourth rectangle 15 and the first short side of the third rectangle 14 and the fifth rectangle 16 are all on the same straight line, and the second short side of the fifth rectangle 16 and one side of the sixth rectangle 17 are on the same straight line; the third rectangle 14 is provided with a reconfigurable switch 40, and a portion of the fifth rectangle 16 is covered in the defective floor structure of the floor panel 20 opposite all or a portion of the sixth rectangle 17.
Correspondingly, as shown in fig. 2 to 5, the lengths of the first rectangle 12 and the third rectangle 14 may be equal. I.e. the feed monopole 10 and the floor 20, when projected onto the plane of the substrate 30, both the first short side of the first rectangle 12 and the second short side of the third rectangle 14 may be in contact with a predetermined side of the floor 20.
It should be noted that, for the specific specification parameters of the substrate 30, the feed monopole 10 and the floor 20, the design personnel can set the parameters themselves, and as shown in fig. 2 to 5, the length and width of the defective ground structure of the floor 20 can be 14mm and 11mm, respectively; the overall size of the feed monopole 10 may be 19mm x 6.2mm, i.e. the sum of the width of the first rectangle 12, the third rectangle 14 and the fifth rectangle 16 and the length of the second rectangle 13 and the fourth rectangle 15 is 19mm, the length of the fifth rectangle 16 is 6.2mm, and the length of the first rectangle 12 and the third rectangle 14 is 4.8mm; the first long side of the fifth rectangle 16 and the first short side of the sixth rectangle 17 are 10mm and 6mm, respectively, from one short side of the defective ground structure; wherein the second long side of the fifth rectangle 16 is connected with the second short side of the sixth rectangle 17, and the second short side of the fifth rectangle 16 and the first long side of the sixth rectangle 17 are on the same straight line. As long as the defective ground structure on the floor 20 is ensured to generate the frequency band required by 3G, the two radiating branches of the feed monopole 10 can generate the frequency bands required by 4G and 5G and the lower branch can reconstruct the upper frequency band required by 5G, so that the small multi-frequency antenna can cover the frequency bands required by 3G, 4G and 5G at the same time, which is not limited in this embodiment.
Correspondingly, as shown in fig. 2 to 5, the thickness of the substrate 30 may be 0.8mm, the widths of the first rectangle 12, the second rectangle 13, the third rectangle 14, the fourth rectangle 15, and the sixth rectangle 17 may be 1mm, the width of the fifth rectangle 16 may be 2.3mm, the length of the sixth rectangle 17 may be 1.7mm, the length of the second rectangle 13 may be 5mm, and the length of the fourth rectangle 15 may be 9.7mm.
Similarly, the specific arrangement positions of the feeding point 11 and the reconfigurable switch 40 in the feeding monopole 10 may be set by the designer, and as shown in fig. 2 to 5, the feeding point 11 may be disposed at the first short side of the first rectangle 12, and the reconfigurable switch 40 may be disposed at 2.4mm from the first short side in the third rectangle 14, which is not limited in this embodiment.
Further, in order to reduce the occupied area of the antenna, as shown in fig. 3 and 4, the side of the floor 20 opposite to the preset side (the opposite side of the preset side) may be overlapped with the side of the substrate 30, the lengths of the floor 20 and the substrate 30 may be equal, and the width of the floor 20 is smaller than the width of the substrate 30, for example, the width of the substrate 30 is equal to the width of the floor 20 plus the length of the first rectangle.
Taking the small multi-frequency antenna shown in fig. 3 as an example, the specific working principle of the small multi-frequency antenna can be represented by current distribution shown in fig. 5, and the working frequency bands are respectively represented by: the defective ground structure produces a current distribution that covers the UMTS band required for 3G as seen in the antenna 1.8GHz current distribution in fig. 5; two radiating branches, wherein the upper branch generates an LTE2300 frequency band and an LTE2500 frequency band required for covering 4G, as seen by the current distribution of the antenna of 2.5GHz in figure 5; the current distribution of the antenna 3.5GHz in the frequency band of 3.3GHz-3.6GHz required by 5G coverage is visible in the lower branch; the 4.8GHz-5GHz frequency band required by 5G coverage is generated by the lower branch after antenna reconstruction, as can be seen in the 4.9GHz current distribution of the antenna in FIG. 5.
And as can be seen from the S parameter of the small multi-frequency antenna in fig. 3 shown in fig. 6 and the directional diagrams of the small multi-frequency antenna in fig. 3 shown in fig. 7 to 10, the small multi-frequency antenna can generate four resonance points, and the bandwidth below-6 dB covers 6 frequency bands above UMTS, LTE2300, LTE2500, WLAN, 3.3GHz-3.6GHz and 4.8GHz-5.0GHz, so as to realize the frequency bands required for simultaneously covering 3G, 4G and 5G.
In this embodiment, the present invention uses the defective ground structure on the floor 20 to generate the frequency band (UMTS) required by 3G, uses the two radiation branches of the feed monopole 10 to generate the frequency bands required by 3.3GHz-3.6GHz and the frequency band required by 5G (LTE 2300 and LTE 2500), and uses the reconstruction of the lower branch to generate the upper frequency band required by 5G (4.8 GHz-5.0 GHz), so that one antenna can cover the frequency bands required by 3G, 4G and 5G at the same time, thereby reducing the antenna occupation area in the terminal; the influence among a plurality of antennas is avoided, and the channel capacity is improved.
In addition, the embodiment of the invention also provides a terminal, which comprises: the small-sized multi-frequency antenna provided by the above embodiment.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the terminal disclosed in the embodiment, since the terminal corresponds to the antenna disclosed in the embodiment, the description is relatively simple, and the relevant points are only referred to the antenna part description.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The small-sized multi-frequency antenna and the terminal provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. A compact multifrequency antenna, comprising: two branch feed monopoles, a floor, a substrate and a reconfigurable switch;
the feeding monopole is printed on the front surface of the substrate, the floor is printed on the back surface of the substrate, the floor is provided with a defective ground structure, the feeding monopole comprises a feeding unit, an upper branch unit and a lower branch unit, the feeding unit is provided with a feeding point, and the lower branch of the feeding monopole is provided with the reconfigurable switch; the defect ground structure is used for generating a UMTS frequency band, the feed monopole is used for generating an LTE2300 frequency band, an LTE2500 frequency band and a 3.3GHz-3.6GHz frequency band by using two branches, and generating a 4.8GHz-5.0GHz frequency band by using reconstruction of a lower branch;
a portion of the upper stub units are relatively covered within the defective floor structure;
the feeding unit is a first rectangle, the lower branch unit is an L-shaped bent branch formed by a second rectangle and a third rectangle, and the upper branch unit is a hook-shaped bent branch formed by a fourth rectangle, a fifth rectangle and a sixth rectangle;
the first short side of the first rectangle is parallel to a preset side of the floor with a defective ground structure and is arranged right above the preset side, the first rectangle is connected with the second rectangle and the fourth rectangle, the second rectangle is connected with the third rectangle, the fifth rectangle is connected with the fourth rectangle and the sixth rectangle, the second short side of the first rectangle, the first long side of the second rectangle and the fourth rectangle and the first short side of the third rectangle and the first short side of the fifth rectangle are all on the same straight line, and the second short side of the fifth rectangle and one side of the sixth rectangle are on the same straight line; the reconfigurable switch is arranged in the third rectangle, and part of the fifth rectangle and all or part of the sixth rectangle are covered in the defective ground structure of the floor in a way of opposite;
the feed point is arranged at a first short side of the first rectangle;
the first rectangle is equal to the third rectangle in length.
2. The small-sized multi-frequency antenna according to claim 1, wherein the length and width of the defective ground structure of the floor are 14mm and 11mm, respectively, the sum of the width of the first, third and fifth rectangles and the length of the second and fourth rectangles is 19mm, the length of the fifth rectangle is 6.2mm, the length of the first and third rectangles is 4.8mm, the width of each of the first, second, third, fourth and sixth rectangles is 1mm, the width of the fifth rectangle is 2.3mm, the length of the second rectangle is 5mm, the length of the sixth rectangle is 1.7mm, and the distances between the first long side of the fifth rectangle and one short side of the sixth rectangle from the defective ground structure are 10mm and 6mm, respectively; the second long side of the fifth rectangle is connected with the second short side of the sixth rectangle, and the second short side of the fifth rectangle and the first long side of the sixth rectangle are on the same straight line.
3. The miniature multi-frequency antenna of claim 2, wherein said reconfigurable switch is disposed 2.4mm from the first short side in said third rectangle.
4. The small-sized multi-frequency antenna according to claim 1, wherein an edge of the floor opposite to the predetermined edge coincides with an edge of the substrate, the floor is equal to the substrate in length, and a width of the floor is smaller than a width of the substrate.
5. The miniature multi-frequency antenna of claim 1, wherein said substrate has a thickness of 0.8mm.
6. A terminal, comprising: a compact multifrequency antenna according to any of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910414767.1A CN110098484B (en) | 2019-05-17 | 2019-05-17 | Small-sized multi-frequency antenna and terminal |
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| CN201910414767.1A CN110098484B (en) | 2019-05-17 | 2019-05-17 | Small-sized multi-frequency antenna and terminal |
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| CN110098484A CN110098484A (en) | 2019-08-06 |
| CN110098484B true CN110098484B (en) | 2024-02-20 |
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| CN110718749B (en) * | 2019-10-25 | 2021-07-06 | 广东工业大学 | Miniaturized multi-frequency planar inverted F antenna |
| CN113013592B (en) * | 2021-02-24 | 2024-03-22 | 昆山睿翔讯通通信技术有限公司 | Antenna and mobile communication equipment |
| CN113381184B (en) * | 2021-05-06 | 2022-05-24 | 荣耀终端有限公司 | Antenna decoupling structure, MIMO antenna and terminal |
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| CN108598666A (en) * | 2018-05-28 | 2018-09-28 | 北京小米移动软件有限公司 | Terminal shell and terminal |
| CN210006903U (en) * | 2019-05-17 | 2020-01-31 | 广东工业大学 | small-sized multi-frequency antenna and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306870A (en) * | 2011-06-29 | 2012-01-04 | 电子科技大学 | Ultra wide band antenna with reconfigurable frequency |
| CN104901000A (en) * | 2015-05-14 | 2015-09-09 | 广东欧珀移动通信有限公司 | Coupled-feeding reconfigurable antenna and manufacturing method |
| CN108598666A (en) * | 2018-05-28 | 2018-09-28 | 北京小米移动软件有限公司 | Terminal shell and terminal |
| CN210006903U (en) * | 2019-05-17 | 2020-01-31 | 广东工业大学 | small-sized multi-frequency antenna and terminal |
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|---|---|
| CN110098484A (en) | 2019-08-06 |
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