CN111446546B - Multi-frequency antenna device - Google Patents
Multi-frequency antenna device Download PDFInfo
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- CN111446546B CN111446546B CN202010398701.0A CN202010398701A CN111446546B CN 111446546 B CN111446546 B CN 111446546B CN 202010398701 A CN202010398701 A CN 202010398701A CN 111446546 B CN111446546 B CN 111446546B
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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
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The present invention provides a multi-frequency antenna device, comprising: the circuit board is provided with a first surface and a second surface which are oppositely arranged, and the first surface is used for grounding; the antenna is arranged on the second surface and is of a plate-shaped structure; the antenna is provided with a plurality of groove-shaped structures, so that the antenna is provided with a plurality of radiating parts which are connected in sequence, and the frequency band ranges of the radiating parts are different. By the technical scheme provided by the invention, the technical problem of complex structure of the multi-frequency antenna in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of multi-frequency antennas, in particular to a multi-frequency antenna device.
Background
At present, the built-in antenna has the advantages of difficult damage, small radiation to human body and the like, and becomes the first choice of the antenna design of the current mobile communication products. However, the ever shrinking space presents a great challenge for improving the performance of antennas, which are typically designed with a certain three-dimensional structure to achieve coverage of different frequencies.
However, the multi-frequency antenna in the prior art has a complex structure, is inconvenient to manufacture and increases the production cost.
Disclosure of Invention
The main objective of the present invention is to provide a multi-frequency antenna device, so as to solve the technical problem of complex structure of the multi-frequency antenna in the prior art.
In order to achieve the above object, the present invention provides a multi-frequency antenna device comprising: the circuit board is provided with a first surface and a second surface which are oppositely arranged, and the first surface is used for grounding; the antenna is arranged on the second surface and is of a plate-shaped structure; the antenna is provided with a plurality of groove-shaped structures, so that the antenna is provided with a plurality of radiating parts which are connected in sequence, and the frequency band ranges of the radiating parts are different.
Further, the plurality of radiating portions includes a first radiating portion, and the plurality of groove-shaped structures includes a first bar-shaped groove, so that the first radiating portion has a plurality of first bar-shaped structures arranged at intervals.
Further, two adjacent first bar structures are arranged in parallel.
Further, the first radiation portion further includes a first connection portion having a first side and a second side disposed opposite to each other, and the first side and the second side are each provided with a first bar-shaped structure.
Further, the length of the first strip-shaped structure is L 1 ，8mm≤L 1 Less than or equal to 12mm; and/or the width of the first strip-shaped structure is B 1 ，1.5mm≤B 1 Less than or equal to 2.5mm; and/or the groove width of the first strip-shaped groove is S 1 ，0.8mm≤S 1 ≤1.2mm。
Further, the plurality of radiating portions includes a second radiating portion, and the plurality of groove-shaped structures includes arc-shaped grooves, so that the second radiating portion is of an arc-shaped structure.
Further, the second radiation part is of an arc structure, and the radius corresponding to the arc structure is R, wherein R is more than or equal to 9.6mm and less than or equal to 10mm; and/or the groove width of the arc-shaped groove is S 3 ，2.4mm≤S 3 ≤3mm。
Further, the plurality of radiating portions comprise a third radiating portion, the third radiating portion comprises a plurality of second strip-shaped structures which are connected in sequence, and the extending directions of the plurality of second strip-shaped structures are arranged in parallel.
Further, the plurality of second bar structures include the second strip shaped plate, third strip shaped plate and fourth strip shaped plate that connect gradually, have the second bar shaped groove between second strip shaped plate and the third strip shaped plate, have the third bar shaped groove between third strip shaped plate and the fourth strip shaped plate, second bar shaped groove and third bar shaped groove parallel arrangement.
Further, the second strip is L in length 2 ，16mm≤L 2 Less than or equal to 20mm; and/or the lengths of the third strip plate and the fourth strip plate are L 3 ，30mm≤L 3 ≤34mm。
Further, the third strip-shaped plate comprises a main body plate and a connecting plate, the connecting plate is arranged at the end part of the main body plate, the width of the connecting plate is larger than that of the main body plate, and the connecting plate is used for being connected with the second strip-shaped plate.
Further, the width of the main body plate is B 2 ，1.5mm≤B 2 Less than or equal to 2.5mm; and/or the width of the connecting plate is B 3 ，3.5mm≤B 3 ≤4.5mm。
Further, the length of the circuit board is L 4 ，110mm≤L 4 Less than or equal to 130mm; and/or the width of the circuit board is B 4 ，55mm≤B 4 ≤65mm。
Further, a ground layer is provided on the first surface, the ground layer being made of a copper material.
By applying the technical scheme of the invention, the antenna is of a plate-shaped structure, and the plurality of radiating parts can be formed by arranging the plurality of groove-shaped structures on the plate-shaped structure, so that the structure is simple and convenient to manufacture, and meanwhile, the frequency band ranges of the radiating parts are different, so that the circuit board can have the coverage for realizing different frequencies. Therefore, the technical scheme provided by the invention can solve the technical problem of complex structure of the multi-frequency antenna in the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a multi-frequency antenna device according to an embodiment of the present invention;
fig. 2 shows a schematic diagram of return loss of a multi-frequency antenna device according to an embodiment of the invention.
Wherein the above figures include the following reference numerals:
10. a circuit board; 20. an antenna; 21. a first radiation portion; 211. a first bar-shaped structure; 212. a first connection portion; 22. a second radiation portion; 23. a third radiation section; 231. a second strip-shaped plate; 232. a third strip-shaped plate; 233. a fourth strip of plate; 31. a first bar-shaped groove; 32. an arc-shaped groove; 33. a second bar-shaped groove; 34. and a third slot.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the present invention provides a multi-frequency antenna device, which includes a circuit board 10 and an antenna 20, wherein the circuit board 10 has a first surface and a second surface disposed opposite to each other, and the first surface is used for grounding. The antenna 20 is disposed on the second surface, and the antenna 20 has a plate-like structure. The antenna 20 is provided with a plurality of slot structures, so that the antenna 20 is provided with a plurality of radiating portions which are sequentially connected, and the frequency band ranges of the radiating portions are different. The antenna 20 in this embodiment has a simple structure, is easy to manufacture, and can achieve coverage of different frequencies through a plurality of radiation portions. Specifically, the circuit board 10 may be a printed circuit board 10, and the material of the printed circuit board is FR4 epoxy resin material. The antenna 20 is disposed on the second surface by a copper-clad process, and the multi-frequency antenna device in this embodiment further includes a feeding structure including a copper wire and a feeding body for introducing electromagnetic wave signals, the copper wire passing through the circuit board 10 to connect the antenna 20 and the feeding body together. The ground plate may be located intermediate the short sides of the antenna 20, connecting the antenna 20 and the ground plane together. By utilizing resonators of unequal lengths, coverage of multiple frequency bands can be achieved while ensuring small size, light weight and low back radiation.
Specifically, the plurality of radiating portions includes the first radiating portion 21, and the plurality of groove-shaped structures includes the first bar-shaped groove 31, so that the first radiating portion 21 has a plurality of first bar-shaped structures 211 arranged at intervals. With such an arrangement, the gain can be improved by the plurality of first stripe structures 211 arranged at intervals, and specifically, the first radiation portion 21 is a high frequency portion.
In order to better improve the gain of the first radiation portion 21, two adjacent first stripe structures 211 are disposed in parallel.
Specifically, the first radiating portion 21 in this embodiment further includes a first connection portion 212, where the first connection portion 212 has a first side and a second side that are disposed opposite to each other, and the first side and the second side are each provided with a first stripe structure 211 to form an array of antennas 20. Specifically, the first strip-shaped structure 211 in this embodiment is a first strip-shaped plate, two first strip-shaped plates are disposed on a first side, two first strip-shaped plates are disposed on a second side, the two first strip-shaped plates on the first side are disposed in parallel, and the two first strip-shaped plates on the second side are disposed in parallel.
In order to better ensure the frequency coverage of the first radiating portion 21, the length of the first stripe structure 211 is L 1 ，8mm≤L 1 Less than or equal to 12mm; and/or the width of the first bar-shaped structure 211 is B 1 ，1.5mm≤B 1 Less than or equal to 2.5mm; and/or the first strip-shaped groove 31 has a groove width S 1 ，0.8mm≤S 1 Less than or equal to 1.2mm. When the length and width of the first strip-shaped structure 211 are too long, the size of the overall antenna 20 may be increased; when the length and width of the first bar structure 211 are smaller, the frequency range may not be covered. By setting a suitable slot width of the first slot 31, it is possible to facilitate control of the coverage of the frequency.
Specifically, in the present embodiment, the length of the first bar-shaped structure 211 is 10mm, the width of the first bar-shaped structure 211 is 2mm, and the groove width of the first bar-shaped groove 31 is 1mm, so that the overall size is reduced as much as possible on the basis of securing the frequency coverage of the first radiation portion 21.
In the present embodiment, the plurality of radiating portions includes the second radiating portion 22, and the plurality of groove-shaped structures includes the arc-shaped groove 32, so that the second radiating portion 22 is of an arc-shaped structure. Specifically, the second radiating portion 22 is used to form the intermediate frequency portion. Specifically, the second radiation portion 22 is connected to the circuit board 10 through a rectangular patch.
In order to ensure the frequency coverage of the second radiation portion 22, the second radiation portion 22 in this embodiment has an arc structure, and the radius corresponding to the arc structure is R, where R is 9.6mm and 10mm; and/or the arcuate slot 32 has a slot width S 3 ，2.4mm≤S 3 ≤3mm。
Specifically, the radius of the arc structure in the present embodiment is 9.8mm, and the slot width of the arc slot 32 is 2.7mm, so as to reduce the overall size as much as possible while ensuring the frequency coverage of the second radiation portion 22. Specifically, the arc-shaped slot 32 is an open slot, and the open length of the open slot is 12mm, so as to ensure the frequency coverage on the basis of ensuring the connection between the arc-shaped structure and the main structure of the antenna 20.
In this embodiment, the plurality of radiation portions includes a third radiation portion 23, and the third radiation portion 23 includes a plurality of second bar-shaped structures connected in sequence, and the extending directions of the plurality of second bar-shaped structures are arranged in parallel, so that the plurality of second bar-shaped structures form a serpentine structure. With such a structural arrangement, the low frequency portion can be formed by the third radiation portion 23 to cover the low frequency range.
Specifically, the plurality of second strip structures include a second strip-shaped plate 231, a third strip-shaped plate 232 and a fourth strip-shaped plate 233 which are sequentially connected, a second strip-shaped groove 33 is formed between the second strip-shaped plate 231 and the third strip-shaped plate 232, a third strip-shaped groove 34 is formed between the third strip-shaped plate 232 and the fourth strip-shaped plate 233, and the second strip-shaped groove 33 and the third strip-shaped groove 34 are arranged in parallel. By adopting the structure, the coverage of low frequency can be conveniently ensured.
In the present embodiment, the second strip 231 has a length L 2 ，16mm≤L 2 Less than or equal to 20mm; and/or the third and fourth strips 232, 233 are each L-shaped in length 3 ，30mm≤L 3 And is less than or equal to 34mm. In order to better secure the coverage frequency range of the third radiating portion 23, the length of the second strip 231 in the present embodiment is 18mm, and the third strip 232 and the fourth strip 233 are 32mm.
Specifically, the third strip-shaped plate 232 includes a main body plate and a connection plate, the connection plate is disposed at an end portion of the main body plate, a width of the connection plate is greater than that of the main body plate, and the connection plate is used for being connected with the second strip-shaped plate 231 to ensure stability of connection. The structure of the fourth strip plate 233 may be the same as the structure of the third strip plate 232.
In the present embodiment, the width of the body plate is B 2 ，1.5mm≤B 2 Less than or equal to 2.5mm; and/or the width of the connecting plate is B 3 ，3.5mm≤B 3 And is less than or equal to 4.5mm. Specifically, in order to better secure the coverage frequency range of the third radiating portion 23, the width of the body plate is 2mm, the width of the connection plate is 4mm, and the length of the connection plate is 5mm. By adopting the structure, the stability of connection can be improved on the basis of guaranteeing the coverage range of the connection frequency.
Specifically, the length of the circuit board 10 is L 4 ，110mm≤L 4 Less than or equal to 130mm; and/or the width of the circuit board 10 is B 4 ，55mm≤B 4 And the thickness is less than or equal to 65mm. Preferably, the length of the circuit board 10 in this embodiment is 120mm, the width is 60mm, and the height is 10mm, so that the circuit board 10 can be ensured to have a sufficient bearing range to bear the antenna 20, and the connection between the antenna 20 and the circuit board 10 is ensured.
In this embodiment, a ground layer is disposed on the first surface, and the ground layer is made of a copper material. Specifically, a grounding metal plane is formed through the arrangement of a full copper coating process, and a grounding plane is formed on one side, far away from the first surface, of the grounding layer. Meanwhile, the radiation of the antenna 20 to the first surface can be reduced by the way of full copper coating.
In this embodiment, the lower edge of the antenna 20 is 5mm from the second surface, the left edge of the antenna 20 is 10mm from the left edge of the circuit board 10, the total length of the antenna 20 is 53mm, and the total width of the antenna 20 is 32mm.
In particular, in this embodiment, different frequency coverage effects can be achieved by changing the relevant dimensions. For example, decreasing (increasing) the area of the ground plane, the resonant frequency of the antenna 20 as a whole may decrease (increase); changing the width and position of the shorting metal sheet affects the return loss and frequency of the antenna 20; changing the position of the feeding portion; changing the length, number and shape of the array antenna 20 (first radiating portion 21); changing the area of the circular antenna 20 (second radiating portion 22) and the size and width of the annular gap; the size of the folded antenna 20 (third radiating portion 23) is changed.
As shown in fig. 2, a schematic diagram of return loss of the multi-frequency antenna device in this embodiment is shown, where the return loss is about-15.9543 dB when the resonance frequency is 850MHz at the point m 1; the point m2 is that when the resonance frequency is 1.69GHz, the return loss is-21.2978 dB; the point m3 is the return loss of-7.9513 dB at a resonant frequency of 2.47 GHz. Points a, B and C are all points corresponding to the lowest point of the respective bands. Specifically, the data corresponding to the point m1, the point m2 and the point m3 are displayed in the upper left corner of the table, and at the same time, the point m1, the point m2 and the point m3 each correspond to the point corresponding to the lowest position at the respective wave band.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the resonant frequency, gain and coverage of the antenna are changed by the methods of an array antenna, a circular antenna, a folding antenna, branch circuit addition, slotting and the like, so that the frequency coverage of the antenna is expanded; the back radiation is reduced by the way of fully covering copper on the back of the antenna device; the overall size is small; the volume and the insertion loss of the antenna are reduced in a coaxial feed mode, the antenna is not easy to interfere, and meanwhile, larger power can be provided.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A multi-frequency antenna device, comprising:
a circuit board (10), the circuit board (10) having oppositely disposed first and second surfaces, the first surface for grounding;
an antenna (20) disposed on the second surface, the antenna (20) having a plate-like structure;
the antenna (20) is provided with a plurality of groove-shaped structures, so that the antenna (20) is provided with a plurality of radiation parts which are sequentially connected, and the frequency band ranges of the radiation parts are different;
the plurality of radiation portions includes:
a first radiation portion (21), a plurality of the groove-shaped structures including a first bar-shaped groove (31) such that the first radiation portion (21) has a plurality of first bar-shaped structures (211) arranged at intervals;
a second radiating portion (22), a plurality of the groove-shaped structures including arc-shaped grooves (32) such that the second radiating portion (22) is of an arc-shaped structure;
the third radiation part (23), the third radiation part (23) includes a plurality of second bar structures that connect gradually, and a plurality of the extending direction parallel arrangement of second bar structure.
2. The multi-frequency antenna device according to claim 1, characterized in that two adjacent first strip-shaped structures (211) are arranged in parallel.
3. The multi-frequency antenna device according to claim 1, wherein the first radiating portion (21) further comprises a first connecting portion (212), the first connecting portion (212) having a first side and a second side arranged opposite each other, the first side and the second side being provided with the first bar-shaped structure (211).
4. The multi-frequency antenna device of claim 1, wherein,
the length of the first strip-shaped structure (211) is L 1 ，8mm≤L 1 Less than or equal to 12mm; and/or the number of the groups of groups,
the width of the first strip-shaped structure (211) is B 1 ，1.5mm≤B 1 Less than or equal to 2.5mm; and/or the number of the groups of groups,
the groove width of the first strip-shaped groove (31) is S 1 ，0.8mm≤S 1 ≤1.2mm。
5. The multi-frequency antenna device according to claim 1, wherein the second radiation portion (22) has a circular arc structure, and a radius corresponding to the circular arc structure is R, and R is more than or equal to 9.6mm and less than or equal to 10mm; and/or the arc-shaped groove (32) has a groove width S 3 ，2.4mm≤S 3 ≤3mm。
6. The multi-frequency antenna device according to claim 1, wherein the plurality of second strip-shaped structures comprise a second strip-shaped plate (231), a third strip-shaped plate (232) and a fourth strip-shaped plate (233) which are sequentially connected, a second strip-shaped groove (33) is arranged between the second strip-shaped plate (231) and the third strip-shaped plate (232), a third strip-shaped groove (34) is arranged between the third strip-shaped plate (232) and the fourth strip-shaped plate (233), and the second strip-shaped groove (33) and the third strip-shaped groove (34) are arranged in parallel.
7. The multi-frequency antenna device according to claim 6, characterized in that the second strip-shaped plate (231) has a length L 2 ，16mm≤L 2 Less than or equal to 20mm; and/or the length of the third strip (232) and the fourth strip (233) is L 3 ，30mm≤L 3 ≤34mm。
8. The multi-frequency antenna device according to claim 7, characterized in that the third strip (232) comprises a main body plate and a connection plate, the connection plate being arranged at an end of the main body plate, the connection plate having a width larger than the width of the main body plate, the connection plate being adapted to be connected with the second strip (231).
9. The multi-frequency antenna device of claim 8, wherein the body plate has a width B 2 ，1.5mm≤B 2 Less than or equal to 2.5mm; and/or the width of the connecting plate is B 3 ，3.5mm≤B 3 ≤4.5mm。
10. The multifrequency antenna device according to claim 1, characterized in that the length of the circuit board (10) is L 4 ，110mm≤L 4 Less than or equal to 130mm; and/or the width of the circuit board (10) is B 4 ，55mm≤B 4 ≤65mm。
11. The multi-frequency antenna device according to any one of claims 1 to 10, wherein a ground layer is provided on the first surface, the ground layer being made of a copper material.
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| CN202010398701.0A CN111446546B (en) | 2020-05-12 | 2020-05-12 | Multi-frequency antenna device |
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| CN202010398701.0A CN111446546B (en) | 2020-05-12 | 2020-05-12 | Multi-frequency antenna device |
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| CN111446546B true CN111446546B (en) | 2024-02-27 |
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