CN114497992B - Antenna structure - Google Patents
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- CN114497992B CN114497992B CN202011261183.4A CN202011261183A CN114497992B CN 114497992 B CN114497992 B CN 114497992B CN 202011261183 A CN202011261183 A CN 202011261183A CN 114497992 B CN114497992 B CN 114497992B
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- 230000005855 radiation Effects 0.000 claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 238000005555 metalworking Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000010295 mobile communication Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001465 metallisation Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
-
- 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
-
- 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
-
- 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
Landscapes
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
An antenna structure. The antenna structure includes: the metal machine component, the grounding element, the feed-in radiation part and the dielectric substrate; the metal machine component is provided with a slot, wherein the slot is provided with a first closed end and a second closed end; the grounding element is coupled to the metal machine component; the feed-in radiation part is provided with a feed-in point, wherein the feed-in radiation part is coupled to the grounding element; the dielectric substrate is provided with a first surface and a second surface which are opposite, wherein the feed-in radiation part is arranged on the first surface of the dielectric substrate, and the second surface is adjacent to the metal machine component; the slot excitation of the metal machine component generates a first frequency band and a second frequency band, and the feed radiation part excitation generates a third frequency band. The antenna structure of the invention can be mutually integrated with the metal-machine component of the mobile device, and compared with the traditional design, the antenna structure of the invention can have the advantages of small size, wide frequency band, low manufacturing cost, beautifying the appearance of the device and the like, so the antenna structure is very suitable for being applied to various mobile communication devices.
Description
Technical Field
The present invention relates to an antenna structure (Antenna Structure), and more particularly to a Multi-band antenna structure.
Background
With the development of mobile communication technology, mobile devices are becoming increasingly popular in recent years, and common examples are: portable computers, mobile phones, multimedia players, and other portable electronic devices with hybrid functions. To meet the needs of people, mobile devices often have wireless communication capabilities. Some cover long range wireless communication ranges, such as: mobile phones use 2G, 3G, LTE (long term evolution ) systems and use frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz, and 2500MHz for communication, while some cover short range wireless communication ranges such as: wi-Fi, bluetooth systems use the frequency bands of 2.4GHz, 5.2GHz, and 5.8GHz for communication.
An Antenna (Antenna) is an indispensable element in the field of wireless communication. If the Bandwidth (Bandwidth) of the antenna for receiving or transmitting signals is insufficient, the communication quality of the mobile device is easily degraded. Therefore, how to design a small-sized, wide-band antenna element is an important issue for antenna designers.
Accordingly, there is a need to provide an antenna structure to solve the above-mentioned problems.
Disclosure of Invention
In a preferred embodiment, the present invention provides an antenna structure, comprising: a metalworking member having a slot, wherein the slot has a first closed end and a second closed end; a grounding element coupled to the metalworking member; the feed-in radiation part is provided with a feed-in point, and the feed-in radiation part is coupled to the grounding element; the dielectric substrate is provided with a first surface and a second surface which are opposite to each other, wherein the feed radiation part is arranged on the first surface, and the second surface is adjacent to the metal machine component; wherein the slot excitation of the metal machine component generates a first frequency band and a second frequency band, and the feed radiation part excitation generates a third frequency band.
In some embodiments, the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5150MHz and 5850MHz, and the third frequency band is between 6000MHz and 7125 MHz.
In some embodiments, the distance between the feeding point and the first closed end of the slot is between 0.25 times and 0.5 times the wavelength of the first frequency band.
In some embodiments, the distance between the feeding point and the second closed end of the slot is between 0.25 times and 0.5 times the wavelength of the second frequency band.
In some embodiments, the feed-in radiating portion is substantially T-shaped.
In some embodiments, the feed-in radiation portion includes a first branch, a second branch, and a third branch, and the feed-in point is located on the first branch.
In some embodiments, the first branch and the third branch are both coupled to the grounding element via the second branch.
In some embodiments, the perpendicular projections of the first branch and the third branch on the metalworking member are located inside the slot.
In some embodiments, the total length of the first branch and the second branch is between 0.25 times and 0.5 times the wavelength of the third frequency band.
In some embodiments, the width of the first leg is greater than the width of the third leg.
In some embodiments, the angle between the second branch and the third branch is between 90 degrees and 180 degrees.
In some embodiments, the feed-in radiation portion has a substantially M-shape.
In some embodiments, the length of the feed-in radiation portion is between 0.25 times and 0.5 times the wavelength of the third frequency band.
In some embodiments, the grounding element further includes a first protruding portion and a second protruding portion.
In some embodiments, the first protruding portion of the grounding element has an elongated shape.
In some embodiments, the second protruding portion of the grounding element presents an inverted T-shape.
In some embodiments, the feed-in radiation portion includes a first rectangular widened portion, a second rectangular widened portion, and a third rectangular widened portion, and the first rectangular widened portion is adjacent to the first protruding portion of the grounding element.
In some embodiments, the first rectangular widened portion, the second rectangular widened portion, and the perpendicular projection of the third rectangular widened portion onto the metalworking member are all located inside the slot.
In some embodiments, the antenna structure further comprises: a circuit element, wherein the third rectangular widened portion is coupled to the second protruding portion of the ground element via the circuit element.
In some embodiments, the circuit element is a capacitor.
The antenna structure of the invention can be mutually integrated with the metal-machine component of the mobile device, and compared with the traditional design, the antenna structure of the invention can have the advantages of small size, wide frequency band, low manufacturing cost, beautifying the appearance of the device and the like, so the antenna structure is very suitable for being applied to various mobile communication devices.
Drawings
Fig. 1 shows a top view of an antenna structure according to an embodiment of the invention.
Fig. 2 shows a cross-sectional view of an antenna structure according to an embodiment of the invention.
Fig. 3 shows a voltage standing wave ratio diagram of an antenna structure according to an embodiment of the invention.
Fig. 4 shows a radiation efficiency diagram of an antenna structure according to an embodiment of the invention.
Fig. 5 shows a top view of an antenna structure according to an embodiment of the invention.
Fig. 6 shows a cross-sectional view of an antenna structure according to an embodiment of the invention.
Description of main reference numerals:
100. 500 antenna structure
110. 510 metal machine component
120. 520 slot
121. 521 first closed end
122. 522 second closed end
130. 530 grounding element
140. 540 feed-in radiation part
150. First branch fed into radiation part
151. First end of the first branch
152. Second end of first branch
160. A second branch of the feed-in radiation part
161. First end
162. The second end of the second branch
170. Third branch fed into radiation part
171. First end of third branch
172. The second end of the third branch
180. 580 dielectric substrate
534. First protruding part of grounding element
535. Second protruding part of grounding element
541. First end of feed-in radiation part
542. A second end of the feed-in radiation part
544. A first rectangular widening part fed into the radiation part
545. Second rectangular widened portion of feed-in radiation part
546. A third rectangular widening part feeding the radiation part
550. Circuit element
D1, D2, D3, D4, D5, D6, D7, D8 pitch
First surfaces of E1 and E3 dielectric substrates
Second surfaces of E2 and E4 dielectric substrates
FB1 first frequency band
FB2 second frequency band
FB3 third frequency band
FP1, FP2 feed point
GC1 coupling gap
Thickness of H1, H2 dielectric substrate
Length of L1, L2, L3
LC1, LC2 section line
Width of W1, W2, W3, W4, W5, W6, W7
Included angle theta
Detailed Description
The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments of the invention.
Certain terms are used throughout the description and claims to refer to particular components. Those of ordinary skill in the art will appreciate that a hardware manufacturer may refer to the same element by different names. The description and claims do not take the form of an element differentiated by name, but rather by functional differences. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The term "substantially" means that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, and achieve the basic technical effect. In addition, the term "coupled" as used herein includes any direct or indirect electrical connection. Accordingly, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections.
The following disclosure provides many different embodiments, or examples, for implementing different features of the disclosure. The following disclosure describes specific examples of various components and arrangements thereof to simplify the description. Of course, these specific examples are not intended to be limiting. For example, if the specification describes a first feature being formed on or over a second feature, that means that it may include embodiments in which the first feature is in direct contact with the second feature, and that additional features may be formed between the first feature and the second feature, such that the first feature and the second feature may not be in direct contact. In addition, the following description may repeat use of the same reference numerals and/or characters in various examples. These repetition are for the purpose of simplicity and clarity and do not in itself dictate a particular relationship between the various embodiments and/or configurations discussed.
Furthermore, spatially relative terms, such as "below" …, "below," "lower," "above," "upper," and the like, are used for convenience in describing the relationship of one element or feature to another element(s) or feature(s) in the icons. In addition to the orientations depicted in the drawings, the spatially dependent terms are intended to encompass different orientations of the device in use or operation. The device may be turned to a different orientation (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Fig. 1 shows a top view of an antenna structure (Antenna Structure) 100 according to an embodiment of the invention. Fig. 2 shows a cross-sectional view (along a section line LC1 in fig. 1) of an antenna structure 100 according to an embodiment of the invention. Please refer to fig. 1 and fig. 2 together. The antenna structure 100 may be applied to a Mobile Device (Mobile Device), for example: a Smart Phone (Smart Phone), a Tablet Computer (Tablet Computer), or a notebook Computer (Notebook Computer). In the embodiment of fig. 1, 2, the antenna structure 100 comprises: a metal machine member (Metal Mechanism Element) 110, a grounding Element (Ground Element) 130, a feeding radiation portion (Feeding Radiation Element) 140, and a dielectric substrate (Dielectric Substrate) 180, wherein the grounding Element 130 and the feeding radiation portion 140 can be made of metal materials, for example: copper, silver, aluminum, iron, or alloys thereof.
The metalization member 110 may be a metal housing of the mobile device. In some embodiments, the metal machine component 110 is a metal top cover of a notebook computer or a metal back cover of a tablet computer, but is not limited thereto. For example, if the mobile device is a notebook computer, the metalorganic member 110 may be commonly referred to as "a-part" in the notebook computer field. The metal machine component 110 has a slot 120, wherein the slot 120 of the metal machine component 110 may have a substantially straight shape. In detail, the slot 120 may have a first Closed End 121 and a second Closed End 122 that are spaced apart from each other. The antenna structure 100 may also include a non-conductive material filled in the slot 120 of the metal machine member 110 to achieve waterproof or dustproof functions.
The dielectric substrate 180 may be an FR4 (flame retardant 4) substrate, a printed circuit board (Printed Circuit Board, PCB), or a flexible circuit board (Flexible Printed Circuit, FPC). The dielectric substrate 180 has a vertical projection (Vertical Projection) on the metalworking member 110, and the vertical projection can completely cover the slot 120 of the metalworking member 110. The dielectric substrate 180 has a first surface E1 and a second surface E2 opposite to each other, wherein the feed radiation portion 140 is disposed on the first surface E1 of the dielectric substrate 180, and the second surface E2 of the dielectric substrate 180 is adjacent to the slot 120 of the metal-machine component 110. It should be noted that the term "adjacent" or "adjacent" in the present specification may refer to that the distance between two corresponding elements is smaller than a predetermined distance (e.g. 5mm or less), and may also include the case that the two corresponding elements are in direct contact with each other (i.e. the distance is shortened to 0). In some embodiments, the second surface E2 of the dielectric substrate 180 is directly attached to the metalization member 110.
The ground element 130 may be a ground copper foil (Ground Copper Foil) that may be coupled to the metalization member 110. In some embodiments, the grounding element 130 extends from the metalization member 110 onto the first surface E1 of the dielectric substrate 180.
The feeding radiation portion 140 may have a T-shape, and its vertical projection may at least partially overlap the slot 120 of the metal machine component 110. The feed radiation portion 140 includes a first Branch (Branch) 150, a second Branch 160, and a third Branch 170, wherein the first Branch 150 and the third Branch 170 are coupled to the grounding element 130 through the second Branch 160. The first branch 150 may generally take the form of a relatively wide straight strip, which may be generally parallel to the ground element 130. In detail, the first branch 150 has a first end 151 and a second end 152, wherein a Feeding Point FP1 is located at the first end 151 of the first branch 150. The feed point FP1 may be coupled to a Signal Source (not shown). For example, the signal source may be a Radio Frequency (RF) module, which may be used to excite the antenna structure 100.
The second leg 160 may generally exhibit a parallelogram or a rectangle. In detail, the second branch 160 has a first end 161 and a second end 162, wherein the first end 161 of the second branch 160 is coupled to the grounding element 130, and the second end 162 of the second branch 160 is coupled to the second end 152 of the first branch 150. The third leg 170 may generally take a narrower straight shape (narrower than the first leg 150) that may be generally parallel to the ground member 130. In detail, the third leg 170 has a first End 171 and a second End 172, wherein the first End 171 of the third leg 170 is coupled to the second End 162 of the second leg 160, and the second End 172 of the third leg 170 is an Open End (Open End). The second end 172 of the third leg 170 and the first end 151 of the first leg 150 may extend in generally opposite and distal directions. In some embodiments, an included angle θ between the second leg 160 and the third leg 170 is between 90 degrees and 180 degrees (e.g., about 120 degrees). However, the present invention is not limited thereto. In other embodiments, the included angle θ may be changed to be equal to 90 degrees, such that the second branch 160 and the third branch 170 are perpendicular to each other. It should be noted that the vertical projections of the first leg 150 and the third leg 170 on the metalworking member 110 are all located entirely inside the slot 120.
Fig. 3 shows a voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR) diagram of the antenna structure 100 according to an embodiment of the invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the voltage standing wave ratio. According to the measurement result of fig. 3, the antenna structure 100 can cover a first frequency band FB1, a second frequency band FB2, and a third frequency band FB3. For example, the first frequency band FB1 may be between 2400MHz and 2500MHz, the second frequency band FB2 may be between 5150MHz and 5850MHz, and the third frequency band FB3 may be between 6000MHz and 7125 MHz. Thus, the antenna structure 100 can support at least wideband operation of conventional WLAN (wireless local area network ) 2.4GHz/5GHz and new generation Wi-Fi 6E.
In terms of antenna principle, the slot 120 of the metal-to-metal component 110 can be excited by coupling of the feed radiation portion 140, so as to generate the first frequency band FB1 and the second frequency band FB2. The first branch 150 and the second branch 160 of the feeding radiation portion 140 can be excited together to generate the aforementioned third frequency band FB3. On the other hand, the third branch 170 of the feeding radiation portion 140 may be used to fine tune the impedance matching (Impedance Matching) of the first, second and third frequency bands FB1, FB2, FB3. According to the actual measurement result, if the vertical projections of the first branch 150 and the third branch 170 fed into the radiation portion 140 are completely designed inside the slot 120, the operation bandwidth (Operation Bandwidth) of the antenna structure 100 can be effectively increased.
Fig. 4 shows a graph of the radiation efficiency (Radiation Efficiency) of the antenna structure 100 according to an embodiment of the invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the radiation efficiency (%). According to the measurement result of fig. 4, the radiation efficiency of the antenna structure 100 in the first frequency band FB1, the second frequency band FB2, and the third frequency band FB3 can be more than 25%, which can satisfy the practical application requirements of the general mobile communication device.
In some embodiments, the element dimensions of the antenna structure 100 may be as follows. The distance D1 from the feed point FP1 to the first closed end 121 of the slot 120 may be between 0.25 times and 0.5 times the wavelength (λ/4- λ/2) of the first frequency band FB1 of the antenna structure 100. The distance D2 from the feed point FP1 to the second closed end 122 of the slot 120 may be between 0.25 times and 0.5 times the wavelength (λ/4- λ/2) of the second frequency band FB2 of the antenna structure 100. The width W1 of the slot 120 may be between 2mm and 3 mm. The total length L1 of the first branch 150 and the second branch 160 may be between 0.25 times and 0.5 times wavelength (λ/4 to λ/2) of the third frequency band FB3 of the antenna structure 100. The length L2 of the third leg 170 may be between 4mm and 5mm. The width W2 of the first leg 150 may be at least 2 times or more than the width W3 of the third leg 170. The distance D3 between the first branch 150 and the grounding element 130 may be between 1mm and 1.5 mm. The distance D4 between the third leg 170 and the grounding element 130 may be between 1.5mm and 2mm. The thickness H1 of the dielectric substrate 180 may be about 0.2mm. The above range of element sizes is derived from a number of experimental results, which helps to optimize the operation bandwidth and impedance matching of the antenna structure 100.
Fig. 5 shows a top view of an antenna structure 500 according to an embodiment of the invention. Fig. 6 shows a cross-sectional view (along a section line LC2 in fig. 5) of an antenna structure 500 according to an embodiment of the invention. Please refer to fig. 5 and fig. 6 together. In the embodiment of fig. 5, 6, the antenna structure 500 comprises: a metal machine component 510, a grounding element 530, a feeding radiation portion 540, and a dielectric substrate 580, wherein the grounding element 530 and the feeding radiation portion 540 can be made of metal materials.
The metalization member 510 may be a metal housing of the mobile device. In some embodiments, the metal machine component 510 is a metal top cover of a notebook computer or a metal back cover of a tablet computer, but is not limited thereto. The metal machine member 510 has a slot 520, wherein the slot 520 of the metal machine member 510 may have a substantially straight shape. In detail, the slot 520 may have a first closed end 521 and a second closed end 522 spaced apart from each other. The antenna structure 500 may also include a non-conductive material filled in the slot 520 of the metal-made component 510 to achieve waterproof or dustproof functions.
The dielectric substrate 580 may be an FR4 substrate, a printed circuit board, or a flexible circuit board. The dielectric substrate 580 has a vertical projection on the metal machine member 510, and the vertical projection can completely cover the slot 520 of the metal machine member 510. The dielectric substrate 580 has a first surface E3 and a second surface E4 opposite to each other, wherein the feed-in radiation portion 540 is disposed on the first surface E3 of the dielectric substrate 580, and the second surface E4 of the dielectric substrate 580 is adjacent to the slot 520 of the metal-machine component 510. In some embodiments, the second surface E4 of the dielectric substrate 580 is directly bonded to the metalization member 510.
The grounding element 530 may be a grounded copper foil that may be coupled to the metalization member 510. In some embodiments, the grounding element 530 extends from the metalization member 510 onto the first surface E3 of the dielectric substrate 580. In detail, the grounding element 530 further includes a first protruding portion (Protruding Portion) 534 and a second protruding portion 535, which can be disposed on the first surface E3 of the dielectric substrate 580. For example, the first protruding portion 534 of the grounding element 530 may generally take on an elongated shape, and the second protruding portion 535 of the grounding element 530 may generally take on an inverted T-shape.
The feeding radiation portion 540 may have an M-shape, and its vertical projection may at least partially overlap with the slot 520 of the metal machine component 510. In detail, the feeding radiation portion 540 has a first end 541 and a second end 542, wherein a feeding point FP2 is located at the first end 541 of the feeding radiation portion 540. The feed point FP2 may be coupled to a signal source. For example, the signal source may be a radio frequency module, which may be used to excite the antenna structure 500. In some embodiments, the feeding radiation portion 540 includes a first rectangular widened portion (Rectangular Widening Portion) 544, a second rectangular widened portion 545, and a third rectangular widened portion 546, wherein the first rectangular widened portion 544 is adjacent to the first protruding portion 534 of the grounding element 530, such that a Coupling Gap (Coupling Gap) GC1 is formed therebetween. In addition, a third rectangular widened portion 546 is located at the second end 542 of the feed-in radiating portion 540, and a second rectangular widened portion 545 is interposed between the first rectangular widened portion 544 and the third rectangular widened portion 546. It should be noted that the perpendicular projection of the first rectangular widened portion 544, the second rectangular widened portion 545, and the third rectangular widened portion 546 onto the metalization member 510 are all located entirely inside the slot 520. Furthermore, the feed point FP2 may be located between the first protruding portion 534 and the second protruding portion 535 of the grounding element 530.
In some embodiments, the antenna structure 500 further includes a circuit element (Circuit Component) 550. The circuit element 550 may be a Fixed Capacitor (Fixed Capacitor), a Fixed Inductor (Fixed Inductor), or a Fixed Resistor (Fixed Resistor). Alternatively, the circuit element 550 may be a variable capacitor (Variable Capacitor), a variable inductor (Variable Inductor), or a variable resistor (Variable Resistor) whose impedance value may be adjusted according to a control potential from a Processor. The third rectangular widened portion 546 of the feed-in radiating portion 540 may also be coupled to the second protruding portion 535 of the ground element 530 via the circuit element 550.
According to the actual measurement result, the antenna structure 500 may cover a first frequency band, a second frequency band, and a third frequency band. For example, the first frequency band may be between 2400MHz and 2500MHz, the second frequency band may be between 5150MHz and 5850MHz, and the third frequency band may be between 6000MHz and 7125 MHz. Thus, the antenna structure 500 may support at least wideband operation of legacy WLAN 2.4GHz/5GHz and new generation Wi-Fi 6E.
In terms of antenna principle, the slot 520 of the metal-to-metal component 510 can be excited by coupling of the feed radiation portion 540, thereby generating the first frequency band and the second frequency band. The feeding radiation portion 540 may also excite to generate the aforementioned third frequency band. The addition of the first, second, and third rectangular widened portions 544, 545, and 546 may be used to fine tune the impedance matching of the aforementioned first, second, and third frequency bands based on actual measurement results. In addition, the addition of the circuit elements 550 facilitates the overall size of the miniature antenna structure 500.
In some embodiments, the element dimensions of the antenna structure 500 may be as follows. The distance D5 from the feed point FP2 to the first closed end 521 of the slot 520 may be between 0.25 times and 0.5 times the wavelength (λ/4- λ/2) of the first frequency band of the antenna structure 500. The distance D6 from the feed point FP2 to the second closed end 522 of the slot 520 may be between 0.25 times and 0.5 times the wavelength (λ/4- λ/2) of the second frequency band of the antenna structure 500. The width W4 of the slot 520 may be between 2mm and 3 mm. The length L3 of the feeding radiation portion 540 may be between 0.25 times and 0.5 times wavelength (λ/4- λ/2) of the third frequency band of the antenna structure 500. The width W5 of the first rectangular widened portion 544 may be greater than the width W6 of the second rectangular widened portion 545, and the width W6 of the second rectangular widened portion 545 may be greater than the width W7 of the third rectangular widened portion 546. For example, the width W5 may be between 5mm and 7mm, the width W6 may be between 3mm and 5mm, and the width W7 may be between 2mm and 3 mm. The distance D7 between the first rectangular widened portion 544 and the second rectangular widened portion 545 may be between 1mm and 2mm. The distance D8 between the second rectangular widening portion 545 and the third rectangular widening portion 546 may be between 3mm and 4 mm. The width of the coupling gap GC1 may be less than 0.5mm. The circuit element 550 may be a capacitor having a capacitance between 0.1pF and 2pF, for example: about 0.9pF. The thickness H2 of the dielectric substrate 580 may be about 0.2mm. The above range of element sizes is derived from a number of experimental results, which helps to optimize the operational bandwidth and impedance matching of the antenna structure 500.
The present invention provides a novel antenna structure that can be integrated with a metal mechanism of a mobile device. Compared with the traditional design, the antenna structure of the invention has the advantages of small size, wide frequency band, low manufacturing cost, beautifying the appearance of the device and the like, so the antenna structure is very suitable for being applied to various mobile communication devices.
It should be noted that the device size, device shape, device parameters, and frequency range are not limitations of the present invention. The antenna designer may adjust these settings according to different needs. The antenna structure of the present invention is not limited to the state illustrated in fig. 1-6. The present invention may comprise only any one or more of the features of any one or more of the embodiments of fig. 1-6. In other words, not all of the illustrated features need be implemented in the antenna structure of the present invention at the same time.
Ordinal numbers such as "first," "second," "third," and the like in the description and in the claims are used for distinguishing between two different elements having the same name and not necessarily for describing a sequential order.
While the invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited thereto, but rather, it should be apparent to one skilled in the art that various changes and modifications can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (21)
1. An antenna structure, the antenna structure comprising:
a metalworking member having a slot, wherein the slot has a first closed end and a second closed end;
a grounding element coupled to the metalworking member;
the feed-in radiation part is provided with a feed-in point, and the feed-in radiation part is coupled to the grounding element; and
the dielectric substrate is provided with a first surface and a second surface which are opposite, wherein the feed-in radiation part is arranged on the first surface, and the second surface is adjacent to the metal machine component;
wherein the slot hole excitation of the metal machine component generates a first frequency band and a second frequency band, and the feed radiation part excitation generates a third frequency band;
the feed-in radiation part comprises a first branch, a second branch and a third branch, and the feed-in point is positioned on the first branch;
wherein the vertical projection of the first branch and the third branch on the metal machine component are both positioned in the slot hole.
2. The antenna structure of claim 1, wherein the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5150MHz and 5850MHz, and the third frequency band is between 6000MHz and 7125 MHz.
3. The antenna structure of claim 1, wherein a distance between the feed point and the first closed end of the slot is between 0.25 times and 0.5 times a wavelength of the first frequency band.
4. The antenna structure of claim 1, wherein a distance between the feed point and the second closed end of the slot is between 0.25 times and 0.5 times a wavelength of the second frequency band.
5. The antenna structure of claim 1, wherein the feed radiation portion presents a T-shape.
6. The antenna structure of claim 1, wherein the first branch and the third branch are coupled to the ground element via the second branch.
7. The antenna structure of claim 1, wherein a total length of the first branch and the second branch is between 0.25 times and 0.5 times wavelength of the third frequency band.
8. The antenna structure of claim 1, wherein a width of the first branch is greater than a width of the third branch.
9. The antenna structure of claim 1, wherein an included angle between the second branch and the third branch is between 90 degrees and 180 degrees.
10. An antenna structure, the antenna structure comprising:
a metalworking member having a slot, wherein the slot has a first closed end and a second closed end;
a grounding element coupled to the metalworking member;
the feed-in radiation part is provided with a feed-in point, and the feed-in radiation part is coupled to the grounding element; and
the dielectric substrate is provided with a first surface and a second surface which are opposite, wherein the feed-in radiation part is arranged on the first surface, and the second surface is adjacent to the metal machine component;
wherein the slot hole excitation of the metal machine component generates a first frequency band and a second frequency band, and the feed radiation part excitation generates a third frequency band;
wherein the length of the feed-in radiation part is between 0.25 times and 0.5 times of the wavelength of the third frequency band.
11. The antenna structure of claim 10, wherein the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5150MHz and 5850MHz, and the third frequency band is between 6000MHz and 7125 MHz.
12. The antenna structure of claim 10, wherein a distance between the feed point and the first closed end of the slot is between 0.25 times and 0.5 times a wavelength of the first frequency band.
13. The antenna structure of claim 10, wherein a distance between the feed point and the second closed end of the slot is between 0.25 times and 0.5 times a wavelength of the second frequency band.
14. The antenna structure of claim 10, wherein the feed-in radiating portion presents an M-shape.
15. The antenna structure of claim 10, wherein the ground element further comprises a first protruding portion and a second protruding portion.
16. The antenna structure of claim 15, wherein the first protruding portion of the ground element presents an elongated shape.
17. The antenna structure of claim 15, wherein the second protruding portion of the ground element exhibits an inverted T-shape.
18. The antenna structure of claim 15, wherein the feed-in radiating portion comprises a first rectangular widening portion, a second rectangular widening portion, and a third rectangular widening portion, and the first rectangular widening portion is adjacent to the first protruding portion of the ground element.
19. The antenna structure of claim 18, wherein the first rectangular widened portion, the second rectangular widened portion, and the third rectangular widened portion are all located inside the slot in a perpendicular projection onto the metalworking member.
20. The antenna structure of claim 18, further comprising:
a circuit element, wherein the third rectangular widened portion is coupled to the second protruding portion of the ground element via the circuit element.
21. The antenna structure of claim 20 wherein the circuit element is a capacitor.
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| CN202011261183.4A CN114497992B (en) | 2020-11-12 | 2020-11-12 | Antenna structure |
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