CN116231283B - Antenna and application - Google Patents
Antenna and application Download PDFInfo
- Publication number
- CN116231283B CN116231283B CN202310238729.1A CN202310238729A CN116231283B CN 116231283 B CN116231283 B CN 116231283B CN 202310238729 A CN202310238729 A CN 202310238729A CN 116231283 B CN116231283 B CN 116231283B
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- antenna
- radiating
- radiation
- radiation part
- feed point
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- 230000005855 radiation Effects 0.000 claims abstract description 59
- 239000002184 metal Substances 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 28
- 238000010168 coupling process Methods 0.000 claims description 28
- 238000005859 coupling reaction Methods 0.000 claims description 28
- 238000005452 bending Methods 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
-
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses an antenna and application, the antenna comprises a first radiation part, a second radiation part, a third radiation part and a fourth radiation part, wherein the second radiation part and the third radiation part are respectively and integrally connected with two ends of the first radiation part, and the fourth radiation part is coupled with the third radiation part; the first radiation part is provided with a signal feed point area connected with the electrode part; the second radiation part is provided with a ground feed point area connected with the ground wire. The antenna can be used in wireless communication transmission of electronic products, and the signal feed point area is electrically connected with the circuit board through an electrode part during application; the ground feed point region is connected to the metal shell of the USB connector. According to the invention, the fourth radiation part and the third radiation part are coupled to improve the directivity of the antenna and increase the coverage area of the antenna, and when the antenna is applied, the metal shell of the USB connector is used as a ground feed point, so that the problems of narrow bandwidth, low efficiency and small gain in the existing antenna can be effectively solved.
Description
Technical field:
the invention relates to the technical field of earphone products, in particular to an antenna and application.
The background technology is as follows:
the 2.4GHz wireless communication is a short-distance wireless transmission technology, wherein the 2.4GHz is a working frequency band, the working frequency band can obtain a larger application range and stronger anti-interference capability, and the 2.4GHz wireless communication technology is widely applied to the short-distance wireless transmission and conduction fields in various household and commercial fields. Bluetooth, wiFi technology also works in this frequency band. As bluetooth and WiFi technologies have been widely used in various electronic products. For example, in order to realize wireless transmission of bluetooth signals for a bluetooth headset, a bluetooth antenna for signal transmission needs to be provided.
As shown in fig. 1, this is a common antenna in the earphone at present, and the main body of the antenna 5 is in an inverted-F shape, and although the structure is simple, the installation is convenient, but the disadvantage is that: the bandwidth is narrow, the efficiency is low, the gain is small, and the directivity is poor.
In the wireless transmission technology, the modeling setting of the antenna is mainly based on better coverage of wireless transmission frequency bands, so that the loss of the antenna is reduced, and the efficiency of the antenna is improved. For example: see Chinese patent number: 201020213676.6, patent name: an invention patent of a single-stage antenna communication device of a mobile phone discloses an antenna which is used in a mobile phone product and is approximately G-shaped. See Chinese patent number: 202020472305.3, patent name: an earphone antenna for a wireless earphone and a wireless earphone. In the patent document, a microphone assembly, a charging thimble and a flexible circuit board thereof of a radiation absorption and interference part in a wireless earphone are formed into a conformal antenna in a conformal mode.
In order to improve the defects of the existing antenna, the inventor provides the following technical scheme through continuous tests.
The invention comprises the following steps:
the invention aims to overcome the defects of the prior art and provide an antenna and application.
In order to solve the technical problems, the invention adopts the following technical scheme: an antenna comprising: the first radiation part, the second radiation part, the third radiation part and the fourth radiation part are respectively and integrally connected to two ends of the first radiation part, and the fourth radiation part is coupled with the third radiation part; the first radiation part is provided with a signal feed point area; the second radiation part is provided with a ground feed point area connected with the ground wire.
In the above technical solution, the second radiating portion is L-shaped, and one of the two radiating arms forming the L-shape is integrally connected with the first radiating portion, and the ground feed point area connected with the ground line is located on the other radiating arm.
In the above technical solution, a bending portion is formed between the ground feed point region and the radiating portion main body.
Furthermore, in the above technical solution, the third radiating portion is U-shaped, the fourth radiating portion is coupled to the U-shaped bending position in the third radiating portion, and the fourth radiating portion has a multi-stage ladder-shaped coupling ladder.
Furthermore, in the above technical scheme, the third radiating part comprises a front radiating arm, a middle connecting arm and a rear radiating arm which are connected in sequence and are arranged in a U shape, wherein the front radiating part is integrally connected with the first radiating part, the fourth radiating part is coupled with the middle connecting part, and the rear radiating arm is arranged on the inner side of the front radiating arm in parallel.
In the above technical solution, the coupling ladders in the fourth radiating portion are in step distribution which are independent from each other and are located at different levels, wherein the coupling ladder located at the farthest end is located at the level of the lowest point.
In the above technical solution, in the coupling ladder in the fourth radiating portion, the coupling ladder at the most distal end is integrally formed with one or more other coupling ladders.
Furthermore, in the above technical scheme, the antenna of the invention is used in 2.4GHz band short-distance wireless communication transmission of electronic products, and a circuit board with a USB connector is arranged in the electronic products; the signal feed point area of the first radiation part is electrically connected with the circuit board through an electrode part; the ground feed point area of the second radiation part is connected to the metal shell of the USB connector.
In the above technical scheme, the first radiation portion is suspended above the circuit board through the electrode portion, so that a space distance is formed between the antenna and the circuit board.
In the above technical scheme, the electronic product is a bluetooth headset, and the USB connector is a Type-C connector.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
first, in the antenna of the present invention, the fourth radiating portion is coupled with the third radiating portion, and by this coupling, the directivity of the antenna is effectively improved, and the coverage area of the antenna is increased. Further, a multi-stage stepped coupling ladder as a fourth radiating portion is added at the U-shaped bending position of the third radiating portion.
Secondly, the invention is applied to the 2.4GHz frequency band short-distance wireless communication transmission of electronic products, and the characteristics of grounding, large volume and stable connection with the circuit board of the metal shell of the USB connector arranged on the circuit board are utilized as ground feed points, so that the problems of narrow bandwidth, low efficiency and small gain in the conventional antenna can be effectively solved.
The invention can completely cover the 2.4GHz network frequency bands of Bluetooth, wiFi, zigbee and the like, has deeper return loss, can reduce the loss of the antenna, ensures that the antenna can radiate more energy into space, and has the advantages of high efficiency and wide antenna coverage range.
Description of the drawings:
fig. 1 is a schematic diagram of an inverted-F antenna in the prior art.
FIG. 2 is a perspective view of a first embodiment of the present invention;
FIG. 3 is a perspective view of a radiation patch according to a first embodiment of the present invention;
FIG. 4 is a perspective view of a radiation patch according to a second embodiment of the present invention;
FIG. 5 is a perspective view of a third embodiment of a radiation patch;
FIG. 6 is a perspective view of a radiation patch according to a fourth embodiment of the present invention;
FIG. 7 is a graph of return loss for a first embodiment of the invention and for a prior art test;
FIG. 8 is a graph showing efficiency in a first and prior art test according to an embodiment of the present invention;
FIG. 9 is an E-plane radiation pattern in a test according to an embodiment of the invention;
fig. 10 is an H-plane radiation pattern in a test according to an embodiment of the present invention.
The specific embodiment is as follows:
the invention will be further described with reference to specific examples and figures.
Referring to fig. 3, the antenna body of the present invention is a radiating patch 4 made of a metal sheet, and includes: a first radiating portion 41, a second radiating portion 42, a third radiating portion 43, and a fourth radiating portion 44. The second radiating portion 42 and the third radiating portion 43 are integrally connected to two ends of the first radiating portion 41, and the fourth radiating portion 44 is coupled to the third radiating portion 43.
The invention relates to an antenna which can be applied to 2.4GHz short-distance wireless communication. See fig. 2, which is a perspective view of the application of the present invention in a wireless headset. It comprises the following steps: a circuit board 1, a USB connector 2 provided on the circuit board 1, an electrode portion 3 electrically connected to the circuit board 1, and a radiation sheet 4 as an antenna of the present invention. During installation, the radiation piece 4 is required to be electrically connected with the corresponding circuit board 1 in the earphone through the electrode part 3, and the electrode part 3 can adopt any one of spring pins, spring pieces, conductive columns, conductive cotton and conductive silica gel. As shown in fig. 2, the electrode part 1 in the first embodiment employs a spring needle.
In the present invention, the first radiation portion 41 has a signal feed point region 411 connected to the electrode portion 3, and the width of the first radiation portion 41 is larger than the width of the other positions of the radiation sheet 4. The whole radiation sheet 4 is suspended above the circuit board 1 through the electrode part 3, and forms a certain space distance with the circuit board 1, so that signal transmission is facilitated.
The main body of the second radiating portion 42 is L-shaped, and one of the two radiating arms forming the L-shape is integrally connected with the first radiating portion 41, and the ground feed point area 421 connected with the ground line is located on the other radiating arm. In the first embodiment, the ground feed area 421 is connected to the metal housing of the USB connector provided on the circuit board 1. That is, in the first embodiment, the metal housing of the USB connector 2 is used as the grounding position, and the following advantages are obtained by adopting this arrangement:
1. since the metal shell of the USB connector 2 is connected to the ground of the circuit board 1, the ground feed area 421 is directly connected to the metal shell of the USB connector 2, and no additional ground connector is required.
2. The metal shell of the USB connector 2 is directly connected with the ground feed area 421, and the technical shell can be used as a radiation area of the antenna at the same time, so that the radiation area is increased.
3. Since the connection between the USB connector 2 and the circuit board 1 is relatively stable, the overall stability of the radiation sheet 4 can be ensured.
4. The metal housing of the USB connector 2 has a larger volume, for example, the Type-C connector used in fig. 2 of the first embodiment, and the metal housing of the Type-C connector is used as the ground feed point of the radiating sheet 4, so that the USB can effectively solve the problems of narrow bandwidth and low efficiency of the antenna.
In order to further increase the stability and the contact area, in the first embodiment, the length of the ground feed region 421 corresponds to the width of the metal housing of the USB connector. In addition, for easy installation and alignment, a bending portion is formed between the ground feed point area 421 and the main body of the radiating portion 42.
The third radiating portion 43 is U-shaped, specifically, the third radiating portion 43 includes a front radiating arm 431, a middle connecting arm 432 and a rear radiating arm 433 which are sequentially connected and are U-shaped, wherein the front radiating portion 431 is integrally connected with the first radiating portion 41, the fourth radiating portion 44 is coupled with the middle connecting portion 432, and the rear radiating arm 433 is arranged in parallel inside the front radiating arm 431.
The fourth radiating portion 44 is coupled to a middle connecting arm 432 of the U-shaped bent position of the third radiating portion 43. The fourth radiation portion 44 coupled to the U-bend position in the third radiation portion 43 is provided to improve the directivity of the antenna. When receiving wireless signals, the traditional inverted-F antenna often has large capability difference of receiving signals in different directions, and has poor directivity. Therefore, in order to improve the directivity of the antenna of the present invention, a fourth radiating portion 44 having a multi-stage coupling ladder is added to the U-shaped bending position of the third radiating portion 43, and a certain horizontal gap is formed between the fourth radiating portion 44 and the middle connecting portion 432 without contact, preferably the horizontal gap is not more than 3mm.
The fourth radiation portion 44 of the present invention adopts a multi-stage coupling ladder, as shown in fig. 3, and in the first embodiment, a four-stage coupling ladder is adopted, and the four-stage coupling ladder is distributed in a ladder shape. The preferred way is to have the four stages of coupling ladders in a stepped arrangement at different levels, wherein the horizontal spacing between the four stages of coupling ladders is no more than 2mm and the vertical spacing is no more than 3mm. In order to facilitate installation, the coupling ladder with the farthest end and longer length can be arranged on the circuit board 1 and directly carried by the circuit board 1, and the other three coupling ladders are consistent in shape and size and supported by foam.
The multi-stage coupling ladder of the present invention may be implemented in other ways, as shown in fig. 4, and is different from the first embodiment in that the fourth radiating portion 44 of the second embodiment is a four-stage coupling ladder, but the most distal coupling ladder is integrally formed with the coupling ladder adjacent thereto.
As shown in fig. 5, the first difference from the above embodiment is that, in the fourth stage coupling ladder of the third embodiment, the intermediate third stage coupling ladder is integrally formed.
As shown in fig. 6, the first difference from the above embodiment is that the fourth stage coupling ladder in the fourth embodiment is integrally formed. The fourth radiating portion 44 in the fourth embodiment may be located at the same level as the third radiating portion 43.
Fig. 7 to 10 show test diagrams of an antenna according to a first preferred embodiment of the present invention. The concrete explanation is as follows:
as shown in FIG. 7, the resonant frequency of the antenna of the first embodiment is 2.4647GHz, the return loss reaches-35.295 dB, the bandwidth of the antenna above-10 dB is 201.1MHz, and the frequency bands of 2.4GHz networks such as Bluetooth, wiFi, zigbee are completely covered. Deeper return loss reduces the loss of the antenna itself so that the antenna can radiate more energy into space. The resonant frequency of the inverted F antenna in the prior art is 2.4598GHz, the return loss is-24.4865 dB, the bandwidth of the antenna above-10 dB is only 26.7MHz, and the bandwidth of the antenna is narrower.
As shown in fig. 8, in the first embodiment, at 2.4GHz, the antenna efficiency is 93.793%; at 2.45GHz, the antenna efficiency reaches 97.078%; at 2.5GHz, the antenna efficiency is 95.962%; the antenna average efficiency was 95.611%. An inverted-F antenna with an antenna efficiency of 18.579% at 2.4 GHz; at 2.45GHz, the antenna efficiency is 80.846%; at 2.5GHz, the antenna efficiency is 45.152%; the average antenna efficiency was 48.192% and the antenna efficiency was low.
As shown in fig. 9, in the gain direction diagram of the present embodiment in the E plane (the plane where the electric field is maximum), the gain reaches 2.96dBi. In the prior art, the gain pattern of the inverted F antenna and the E plane has the gain of 0.162dBi and smaller gain.
As shown in fig. 10, in the gain direction diagram of the antenna in the H plane (the plane where the magnetic field is maximum) in this embodiment, the gain reaches 2.69dBi. In the inverted F antenna in the prior art, the gain of the gain pattern of the H plane is-0.461 dBi, and the gain is smaller.
In summary, the antenna of the invention has the characteristics of wide bandwidth, high efficiency, large gain and better directivity.
It is understood that the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, but rather is to be accorded the full scope of all such modifications and equivalent structures, features and principles as set forth herein.
Claims (7)
1. An antenna, comprising: first radiation portion, second radiation portion, third radiation portion and fourth radiation portion, its characterized in that: the second radiation part and the third radiation part are respectively and integrally connected to two ends of the first radiation part, and the fourth radiation part is coupled with the third radiation part;
the first radiation part is provided with a signal feed point area;
the second radiation part is provided with a ground feed point area connected with a ground wire;
the third radiation part is U-shaped;
the fourth radiating part is coupled with the U-shaped bending position in the third radiating part, the fourth radiating part is provided with multi-stage ladder-shaped coupling ladders, the coupling ladders in the fourth radiating part are mutually independent and are distributed in steps positioned on different horizontal planes, and the coupling ladder positioned at the farthest end is positioned on the horizontal plane of the lowest point; namely, the coupling ladder at the farthest end is arranged on the circuit board and is carried by the circuit board, and other coupling ladders are supported by foam.
2. An antenna according to claim 1, characterized in that: the second radiating part is L-shaped, and forms two L-shaped radiating arms, wherein one radiating arm is integrally connected with the first radiating part, and a ground feed point area connected with the ground wire is positioned on the other radiating arm.
3. An antenna according to claim 2, characterized in that: a bending part is formed between the ground feed point area and the radiating part main body.
4. An antenna according to claim 1, characterized in that: the third radiating part comprises a front-section radiating arm, a middle-section connecting arm and a rear-section radiating arm which are sequentially connected and are arranged in a U shape, wherein the front-section radiating arm is integrally connected with the first radiating part, the fourth radiating part is coupled with the middle-section connecting arm, and the rear-section radiating arm is arranged on the inner side of the front-section radiating arm in parallel.
5. An antenna according to any one of claims 1-4, characterized in that: the antenna is used for 2.4GHz frequency band short-distance wireless communication transmission of an electronic product, and a circuit board with a USB connector is arranged in the electronic product;
the signal feed point area of the first radiation part is electrically connected with the circuit board through an electrode part;
the ground feed point area of the second radiation part is connected to the metal shell of the USB connector.
6. An antenna according to claim 5, wherein: the first radiation part is suspended above the circuit board through the electrode part, so that a space distance is formed between the antenna and the circuit board.
7. An antenna according to claim 5, wherein: the electronic product is a Bluetooth headset, and the USB connector is a Type-C connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238729.1A CN116231283B (en) | 2023-03-14 | 2023-03-14 | Antenna and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238729.1A CN116231283B (en) | 2023-03-14 | 2023-03-14 | Antenna and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116231283A CN116231283A (en) | 2023-06-06 |
| CN116231283B true CN116231283B (en) | 2024-03-19 |
Family
ID=86571165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310238729.1A Active CN116231283B (en) | 2023-03-14 | 2023-03-14 | Antenna and application |
Country Status (1)
| Country | Link |
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| CN (1) | CN116231283B (en) |
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| Publication number | Publication date |
|---|---|
| CN116231283A (en) | 2023-06-06 |
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