CN220797104U - Loop antenna structure - Google Patents
Loop antenna structure Download PDFInfo
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- CN220797104U CN220797104U CN202322634497.XU CN202322634497U CN220797104U CN 220797104 U CN220797104 U CN 220797104U CN 202322634497 U CN202322634497 U CN 202322634497U CN 220797104 U CN220797104 U CN 220797104U
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- metal portion
- slot
- metal
- loop antenna
- antenna structure
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- 239000002184 metal Substances 0.000 claims abstract description 152
- 238000004891 communication Methods 0.000 claims abstract description 18
- 239000000615 nonconductor Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 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
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
A loop antenna structure comprising: the annular metal part, the first metal part, the second metal part and the third metal part and the slot part. The annular metal part comprises four side parts; the first metal part, the second metal part and the third metal part extend on the inner side of the annular metal part, and the first metal part is also provided with a feed-in point. The slot portion includes: a first slot, a first metal portion slot, a slot portion first leg, a slot portion second leg, a slot portion third leg, and a slot portion fourth leg formed between the annular metal portion, the metal portions, and/or the side portions. The loop antenna structure has multiple frequency bands and broadband, and can provide good signal receiving and transmitting efficiency and stable communication quality.
Description
Technical Field
The present utility model relates to an antenna structure, and more particularly, to a loop antenna structure with multiple frequency resonances and broadband.
Background
With the progress of wireless communication technology, devices with wireless communication function have been very popular. Wireless communication systems are broadly classified into two main categories due to different coverage distances, one of which is a wide area wireless network, such as: 4G/LTE (Long Term Evolution) G, using frequency bands of 700 MHz-900 MHz and 1700 MHz-2500 MHz for communication; another is a local wireless network, for example; bluetooth (Bluetooth), wiFi 6E, using 2.4GHz, 5 GHz-6 GHz and 6 GHz-7 GHz frequency bands for communication.
The antenna is an essential element in wireless communication, and along with the increase of the application frequency band and the increase of the transmission rate, the antenna with good signal receiving and transmitting efficiency is one of the key factors of stable communication quality, so the antenna design with multiple frequency bands and wide frequency band is an important trend in wireless communication application.
Disclosure of utility model
The present utility model provides a loop antenna structure, comprising: a ring-shaped metal part having a rectangular outline on the inner side thereof, and formed with a first side part, a second side part, a third side part, and a fourth side part arranged in four directions; a first metal part coupled to the first side part and extending inside the annular metal part; a second metal part coupled to the first side part and the second side part and extending inside the annular metal part; a third metal part coupled to the first side part and the third side part and extending inside the annular metal part; and a slot portion formed between the annular metal portion and the first metal portion, the second metal portion and the third metal portion, comprising: a first slot formed between the first metal portion and the fourth side portion; a first metal portion slit formed between the first metal portion and the first side portion; a first branch part of the slot part, which is formed between the first metal part and the first side part and the second metal part and communicates the first metal part slot with the first slot; a slot part second branch part formed between the first metal part and the first side part and the third metal part and communicated with the first slot; a third branch part of the slot part, which is formed between the second metal part and the second side part and the fourth side part and is communicated with the first slot and the first branch part of the slot part; and a fourth branch portion of the slot portion formed between the third metal portion and the third and fourth side portions and communicating the first slot and the second branch portion of the slot portion.
In a preferred embodiment of the present utility model, the loop antenna structure is formed of a metallic material.
In some embodiments of the present utility model, the non-conductive support element may further include a ring-shaped metal portion, the first metal portion, the second metal portion, and the third metal portion all disposed on the non-conductive support element.
In some embodiments, the non-conductive support element may be a printed circuit board, a flexible circuit board, or a plastic part.
In some embodiments, the feeding point is located on the first metal portion and is adjacent to a communication position between the first metal portion slot and the first branch portion of the slot portion.
In some embodiments, a side portion of the first metal portion adjacent to the first side portion of the annular metal portion is coupled to exhibit an asymmetric approximately T-shape.
In some embodiments, the second metal portion is coupled to side portions of the first side portion and the second side portion that are adjacent to each other; the third metal portion is coupled with side portions of the first side portion and the third side portion adjacent to each other and each exhibits an inverted J shape.
In some embodiments, the third leg of the slot portion and the open end of the fourth leg of the slot portion each have an inverted L shape.
In some embodiments, the side portions of the annular metal portion may be adjusted according to the contour of the non-conductive support element, the side portions may each have a different shape, and the inner side of the annular metal portion may have a rectangular-like contour.
In some embodiments, the first slot of the slot portion is in a straight bar shape with equal width or unequal width and two ends open.
In some embodiments, the third metal portion is coupled to the adjacent sides of the first side portion, the third side portion and the fourth side portion of the annular metal portion, and the fourth branch portion of the slot portion is closed at two ends.
"Coupled" includes any direct or indirect electrical connection.
Drawings
Fig. 1 is a schematic view showing a loop antenna structure according to a first embodiment of the present utility model;
fig. 2 is a graph showing a voltage standing wave ratio of a loop antenna structure according to a first embodiment of the present utility model;
fig. 3 is a schematic view showing a loop antenna structure according to a second embodiment of the present utility model;
Fig. 4 is a graph showing a voltage standing wave ratio of a loop antenna structure according to a second embodiment of the present utility model;
fig. 5 is a schematic view showing a loop antenna structure according to a third embodiment of the present utility model; and
Fig. 6 is a voltage standing wave ratio graph showing a loop antenna structure according to a third embodiment of the present utility model.
Description of the reference numerals
100. 300, 500 Loop antenna structure
110. 310, 510 Annular metal part
111. 311, 511 First side
112. 312, 512 Second side
113. 313, 513 Third side
114. 314, 514 Fourth side
120. 320, 520 First metal part
121. 321, 521 Feed-in point
130. 330, 530 Second metal part
140. 340, 540 Third metal part
150. 350, 550 Gap groove part
151. 351, 551 First slot
152. 352, 552 First metal slot
153. 353, 553 First branch of slot portion
154. 354, 554 Second leg of the slot portion
155. 355, 555 Third branch part of the slot part
156. 356, 556 Fourth branch of the slot part
160. 360, 560 Non-conductor support element
Detailed Description
In order that the utility model may be readily understood, a detailed description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Some, but not all embodiments of the utility model are shown in the drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. All other embodiments, based on the embodiments of the utility model, which a person of ordinary skill in the art would obtain without undue experimentation, are within the scope of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
First embodiment
Fig. 1 is a schematic diagram of a loop antenna structure 100 according to a first embodiment of the present utility model. The loop antenna structure 100 can be applied in mobile devices, such as: smart phones, tablet computers, or notebook computers, …, etc. As shown in fig. 1, the loop antenna structure 100 includes a loop metal portion 110, a first metal portion 120, a second metal portion 130, a third metal portion 140, and a slot portion 150. The annular metal portion 110 has a rectangular outline inside, and has a first side portion 111, a second side portion 112, a third side portion 113, and a fourth side portion 114 arranged in four directions.
The first metal portion 120 is coupled to a portion of the side edge of the first side portion 111, which is asymmetric and approximately T-shaped, and extends inside the annular metal portion 110, and a feeding point 121 is disposed on the first metal portion 120. The second metal portion 130 is coupled to the adjacent side portions of the first side portion 111 and the second side portion 112, and extends inside the annular metal portion 110. The third metal part 140 is coupled with side edge portions adjacent to the first side part 111, the third side part 113 and the fourth side part, and extends inside the annular metal part 110 to each take an inverted J shape.
The first, second and third metal portions 120, 130 and 140 and the first, second and third side portions 111, 112 and 113 (i.e., inside the annular metal portion 110) form the slot portion 150. The slot portion 150 includes: a first slit 151 formed between the first metal part 120 and the fourth side part 114 and having both ends open; a first metal part slit 152 formed between the first metal part 120 and the first side part 111; a first branch 153 formed between the first metal part 120 and the first and second side parts 111 and 130 and having open ends, and the first branch 153 communicates with the first metal part slit 152 and the first slit 151; a slit portion second branch portion 154 formed between the first metal portion 110 and the first side portion 111 and the third metal portion 140, and an opening end of the slit portion second branch portion 154 communicates with the first slit 151; a third branch 155 of the slot part formed between the second metal part 130 and the second and fourth side parts 112 and 114, and an opening end of the third branch 155 of the slot part communicates with the first slot 151 and the first branch 153 of the slot part; and a slit portion fourth branch portion 156 formed between the third metal portion 140 and the third and fourth side portions 113 and 114, and an open end of the slit portion fourth branch portion 156 communicates with the first slit 151 and the slit portion second branch portion 154.
The feeding point 121 is disposed at the first metal portion 110 and is adjacent to the communication portion between the first metal portion slot 152 and the slot portion first branch 153; the feed point 121 is used for coupling to the positive electrode of the signal source, the negative electrode of the signal source is coupled to the annular metal portion 110, and the first side 111 of the annular metal portion 110 is coupled to ground.
The third branch 155 and the fourth branch 156 have opposite open ends and each have an inverted L shape, and the two open ends of the inverted L shape are respectively connected to two ends of the first slot 151.
In the loop antenna structure 100 of the first embodiment, a non-conductive support element 160 may be included. That is, the annular metal portion 110, the first metal portion 120, the second metal portion 130 and the third metal portion 140 are all disposed on the non-conductive supporting element 160, wherein the non-conductive supporting element may be a printed circuit board, a flexible circuit board or a plastic part; the loop antenna structure 100 is interconnected with the electronic device in a mating mechanism design.
Fig. 2 is a voltage standing wave ratio graph of a loop antenna structure 100 according to a first embodiment of the present utility model, and according to the measurement result of fig. 2, the loop antenna structure 100 covers the application frequency bands and bandwidths required by WiFi 6 and WiFi 6E, which are respectively: application band one (AFB 1) between 2.4GHz and 2.5 GHz; application frequency band two (AFB 2) between 5.15GHz and 5.895 GHz; and an application band three (AFB 3) between 5.925GHz and 7.125 GHz.
The influence of each metal part of the loop antenna structure 100 is as follows: the feeding point 121 is disposed on the first metal portion 20 as an excitation portion, the first metal portion 120, the second metal portion 130, the third metal portion 140 and the annular metal portion 110 together generate the three application frequency bands, and the first metal portion 120 and the annular metal portion 110 together generate the application frequency band one and the application frequency band two. The second metal part 130 and the annular metal part 110 together create an application band three. The third metal portion 140 and the annular metal portion 110 can simultaneously adjust the first and second application frequency bands and fine tune the impedance matching of the two frequency bands.
The effect of the slot portions is as follows. The first slot 151 can adjust the first application band and the second application band simultaneously. The first metal slot 152, the first leg 153 and the second leg 154 can simultaneously adjust the impedance matching between the first and second application bands and between the two bands. The first branch 153 and the third branch 155 can adjust the impedance matching between the second and third frequency bands. The second leg 154 and the fourth leg 156 of the slot adjust the impedance matching between the first and second application bands and the two bands.
Second embodiment
Fig. 3 is a schematic diagram of a loop antenna structure 300 according to a second embodiment of the present utility model. Fig. 3 is similar to fig. 1, and in the embodiment of fig. 3, loop antenna structure 300 includes a loop metal portion 310, a first metal portion 320, a second metal portion 330, a third metal portion 340, and a slot portion 350. Wherein the outline of the annular metal portion 310 is irregularly shaped, and the inner side of the annular metal portion presents a rectangular-like outline, and has a first side portion 311, a second side portion 312, a third side portion 313 and a fourth side portion 314 arranged in four directions, and a non-conductor supporting element 360; a feed-in point 321 is disposed on the first metal portion 310. The slot portion 350 includes: the first slot 351 is in communication with the first metal portion slot 352, wherein the first metal portion slot 352 is in communication with the slot first leg 353; the first slot portion 351 is in communication with four slot portion branches, such as a first slot portion 353, a second slot portion 354, a third slot portion 355, and a fourth slot portion 356.
The main difference between the loop antenna 300 of the second embodiment shown in fig. 3 and the loop antenna 100 of the first embodiment shown in fig. 1 is that the outline of the loop metal portion 310 is irregular, and the inner side presents a rectangular-like outline; the first slot 351, the third slot portion 355 and the fourth slot portion 356 are in non-uniform width communication; the first side 311 and the fourth side 314 of the annular metal portion 310 are coupled to ground.
Fig. 4 is a voltage standing wave ratio chart of a loop antenna structure 300 according to a second embodiment of the present utility model; according to the measurement results shown in fig. 4, the loop antenna structure 300 can cover the application frequency band and bandwidth required by WiFi 6 and WiFi 6E in the same way as the loop antenna structure 100 described above. In the loop antenna structure 300, the fourth side 314 is coupled to ground, and can adjust the application frequency band to match its impedance. The first slot 351, the third leg 355 and the fourth leg 356 are in non-uniform width communication, and the impedance matching between the first and second application bands and between the two bands can be adjusted. The loop antenna structure 300 may be implemented in the manner described when the loop metal portion 310 is irregularly shaped to achieve similar characteristics as the loop antenna structure 100.
Third embodiment
Fig. 5 is a schematic diagram of a loop antenna 500 according to a third embodiment of the present utility model. Fig. 5 is similar to fig. 1, and in the embodiment of fig. 5, the loop antenna structure 500 includes a loop metal portion 510, a first metal portion 520, a second metal portion 530, a third metal portion 540, and a slot portion 550. Wherein the inner side of the annular metal part 510 presents a rectangular outline and has a first side 511, a second side 512, a third side 513 and a fourth side 514 arranged in four directions, and a non-conductor supporting element 560; a feed-in point 521 is disposed on the first metal portion 510. The slot 550 includes: the first slot 551 and the first metal slot 552, wherein the first metal slot 552 communicates with the slot first leg 553; the first slot portion 551 is in communication with three slot portion branches, such as a first slot portion 553, a second slot portion 554, and a third slot portion 555.
The main difference between the loop antenna 500 shown in fig. 5 and the loop antenna 100 of fig. 1 is that the third metal portion 540 of the loop antenna 500 is coupled to the adjacent sides of the first side 511, the third side 513 and the fourth side 514 of the loop metal portion 510. The two ends of the fourth branch part of the slot part are completely closed. The first side 511 and the fourth side 514 of the annular metal portion 510 are coupled to ground.
Fig. 6 shows a voltage standing wave ratio graph of a loop antenna 500 according to a third embodiment of the present utility model, and the loop antenna structure 500 may cover the same application frequency band as the loop antenna structure 100 according to the measurement result shown in fig. 6.
The foregoing description of the preferred embodiments of the present utility model has been presented only in terms of those specific and detailed descriptions, and is not, therefore, to be construed as limiting the scope of the claimed utility model. It should be noted that it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (9)
1. A loop antenna structure comprising:
A ring-shaped metal part having a rectangular outline on the inner side thereof, and formed with a first side part, a second side part, a third side part, and a fourth side part arranged in four directions;
A first metal portion coupled to the first side portion and extending inside the annular metal portion;
a second metal portion coupled to the first and second side portions and extending inside the annular metal portion;
A third metal portion coupled to the first and third side portions and extending inside the annular metal portion;
and a slit portion formed between the annular metal portion and the first metal portion, the second metal portion and the third metal portion, comprising:
A first slot formed between the first metal portion and the fourth side portion;
a first metal portion slit groove formed between the first metal portion and the first side portion;
a first branch portion of a slot portion formed between the first metal portion and the first side portion and the second metal portion, and communicating the first metal portion slot with the first slot;
A slit portion second branch portion formed between the first metal portion and the first and third side portions and communicating the first slit;
A slit portion third branch portion formed between the second metal portion and the second and fourth side portions and communicating the first slit and the slit portion first branch portion; and
And a fourth branch portion of the slot portion, which is formed between the third metal portion and the third and fourth side portions, and communicates the first slot and the second branch portion of the slot portion.
2. The loop antenna structure of claim 1, formed of a metallic material.
3. The loop antenna structure of claim 1, further comprising a non-conductor support element, wherein the loop metal portion, the first metal portion, the second metal portion, and the third metal portion are disposed on the non-conductor support element.
4. The loop antenna structure of claim 3, wherein the non-conductive support element is a printed circuit board, a flexible circuit board, or a plastic part.
5. The loop antenna structure of claim 1, wherein the feed point is located on the first metal portion and is adjacent to a communication between the first metal portion slot and the slot portion first branch portion.
6. The loop antenna structure of claim 1, wherein a side portion of the first metal portion adjacent to the first side portion of the loop metal portion is coupled to exhibit an asymmetric approximately T-shape.
7. The loop antenna structure of claim 1, wherein the second metal portion is coupled to side portions adjacent the first and second sides, and the third metal portion is coupled to side portions adjacent the first and third sides, and each exhibits an inverted J-shape.
8. The loop antenna structure of claim 1, wherein the first slot is a straight bar with equal or unequal widths and open at both ends.
9. The loop antenna structure of claim 1, wherein the third metal portion is coupled to sides of the loop metal portion adjacent to the first side portion, the third side portion, and the fourth leg of the slot portion is closed at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322634497.XU CN220797104U (en) | 2023-09-27 | 2023-09-27 | Loop antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322634497.XU CN220797104U (en) | 2023-09-27 | 2023-09-27 | Loop antenna structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220797104U true CN220797104U (en) | 2024-04-16 |
Family
ID=90664365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322634497.XU Active CN220797104U (en) | 2023-09-27 | 2023-09-27 | Loop antenna structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220797104U (en) |
-
2023
- 2023-09-27 CN CN202322634497.XU patent/CN220797104U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |