CN111082220A - Miniaturized multiband antenna and electronic device - Google Patents
Miniaturized multiband antenna and electronic device Download PDFInfo
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- CN111082220A CN111082220A CN201911425534.8A CN201911425534A CN111082220A CN 111082220 A CN111082220 A CN 111082220A CN 201911425534 A CN201911425534 A CN 201911425534A CN 111082220 A CN111082220 A CN 111082220A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
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Abstract
The invention discloses a miniaturized multiband antenna and electronic equipment. The C-shaped branch works in a second frequency band, is connected with the main radiation branch and is in impedance matching with the main radiation branch so as to optimize the radiation performance of the antenna in the second frequency band. The invention is used for solving the technical problem that the existing antenna system needs to pass through two antennas when realizing two working frequency bands of WiFi and Bluetooth.
Description
Technical Field
The present invention relates to the field of signal transmission technologies, and in particular, to a miniaturized multiband antenna and an electronic device.
Background
At present, the Bluetooth technology and the WiFi technology are mature day by day, when electronic equipment transmits signals, electromagnetic wave conversion is achieved through an antenna, signal sending and receiving are achieved, and due to the fact that the working frequency band of the antenna is single and the antenna is only optimized for a certain frequency band during design. Therefore, the antenna which is designed in a targeted mode works in an optimized frequency band, and the transmission efficiency of the antenna is the best.
Many products and devices in the prior art can simultaneously support the bluetooth connection mode and the WiFi connection mode for data transmission. In order to sufficiently ensure the transmission efficiency of the antenna, the WiFi system and the bluetooth system of the existing electronic device are implemented by two independent antennas, so as to perform the conversion of the electromagnetic wave. However, at least one antenna operating in the WiFi frequency band and at least one antenna operating in the bluetooth frequency band are adopted, and due to the influence of isolation and the like, the size of an antenna system supporting the bluetooth connection mode and the WiFi connection mode is relatively large.
Disclosure of Invention
The invention mainly aims to provide a miniaturized multiband antenna, and aims to solve the technical problem that the existing antenna system is large in size when working at two different working frequency bands simultaneously.
To achieve the above object, the present invention proposes a miniaturized multiband antenna comprising:
a dielectric substrate;
the main radiation branch knot is arranged on the medium substrate and works in a first frequency band;
the coupling branch and the main radiation branch form a distributed capacitor so as to optimize the impedance matching of the main radiation branch in the first frequency band;
and the C-shaped branch node works in a second frequency band, is connected with the main radiation branch node, and performs impedance matching with the main radiation branch node so as to optimize the radiation performance of the antenna in the second frequency band.
Optionally, the dielectric substrate includes a clearance area, and the main radiation branch, the coupling branch, and the C-shaped branch are all disposed in the clearance area.
Optionally, the miniaturized multiband antenna further comprises a graded-impedance microstrip feed line and a metal ground, the clearance area and the metal ground are adjacently arranged, the graded-impedance microstrip feed line is electrically connected with the main radiation branch, and the graded-impedance microstrip feed line is arranged on the metal ground.
Optionally, the length of the dielectric substrate is 18mm, the width of the dielectric substrate is 18.9mm, and the thickness of the dielectric substrate is 1.53 mm.
Optionally, the main radiating branch includes a U-shaped section and an L-shaped section, the coupling branch is disposed in the middle of the U-shaped section, and forms an E-shaped section with the U-shaped section, and the coupling branch is disposed at a position where 1/4 wavelengths of a second frequency band in the middle of the U-shaped section are located.
Optionally, the C-shaped branch comprises a first section, a second section and a third section which are connected in sequence, wherein the length of the first section is 3.15mm, and the width of the first section is 0.9 mm; the length of the second section is 6mm-8mm, and the width of the second section is 0.9 mm; the length of the third section is 4mm, and the width of the third section is 0.9 mm.
Optionally, the U-shaped section includes a fourth section, a fifth section and a sixth section which are connected in sequence; the length of the fourth section is 9mm, and the width of the fourth section is 1.8 mm; the length of the fifth section is 6.5mm, and the width of the fifth section is 1.8 mm; the length of the sixth section is 7.2mm, and the width of the sixth section is 1.8 mm.
Optionally, the L-shaped section comprises a seventh section and an eighth section which are connected in sequence; the length of the seventh section is 5.85mm, and the width of the seventh section is 1.8 mm; the length of the seventh section is 9mm, and the width of the seventh section is 1.8 mm.
Optionally, the length of the coupling branch is 6mm-8mm, and the width of the coupling branch is 0.9 mm.
To achieve the above object, the present invention also proposes an electronic device comprising a miniaturized multiband antenna as described above.
The invention provides a miniaturized multiband antenna, which is provided with a dielectric substrate, a main radiation branch, a coupling branch and a C-shaped branch, wherein the main radiation branch is arranged on the dielectric substrate and works in a first frequency band, the coupling branch and the main radiation branch form a distributed capacitor to optimize the impedance matching of the main radiation branch in the first frequency band, the C-shaped branch works in a second frequency band, is connected with the main radiation branch and performs impedance matching with the main radiation branch to optimize the radiation performance of the antenna in the second frequency band, so that only one antenna is adopted, the occupied area of the antenna is reduced, the antenna can work in two frequency bands simultaneously by arranging different branches, and the impedance of the antenna is effectively improved, the scheme utilizes the combined action of multi-branch antennas to cooperatively couple to form resonance at high and low frequency points, and creatively uses the C-shaped branch to perform impedance adjustment, meanwhile, according to the structural advantages of the antenna radiator, different distributed capacitances are formed on the main radiating surface formed by the coupling branches and the main radiating branches, so that the impedance of the antenna is effectively improved, and the radiation performance of the antenna can be realized on the basis of ensuring miniaturization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a miniaturized multi-band antenna according to the present invention;
fig. 2 is a diagram illustrating simulation results of a miniaturized multi-band antenna according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a miniaturized multiband antenna which is used for solving the technical problem that the driving capability of an existing driving chip is limited.
In one embodiment, as shown in fig. 1, a miniaturized multiband antenna is provided with a dielectric substrate, a main radiation branch 30, a coupling branch 40 and a C-shaped branch 50, wherein the main radiation branch 30 is disposed on the dielectric substrate and operates in a first frequency band, the coupling branch 40 and the main radiation branch 30 form a distributed capacitor to optimize impedance matching of the main radiation branch 30 in the first frequency band, the C-shaped branch 50 operates in a second frequency band, is connected to the main radiation branch 30 and performs impedance matching with the main radiation branch 30 to optimize radiation performance of the antenna in the second frequency band, so that only one antenna is used to reduce an area occupied by the antenna, the antenna is divided into different branches to realize simultaneous operation of the antenna in the two frequency bands, and the impedance of the antenna is effectively improved, the above scheme utilizes a multi-branch antenna to cooperate to couple to form resonance at high and low frequency points, the impedance is creatively adjusted by using the C-shaped branch, and meanwhile, according to the structural advantages of the antenna radiator, different distributed capacitances are formed by using the main radiating surface formed by the coupling branch 40 and the main radiating branch 30, so that the impedance of the antenna is effectively improved, and the radiation performance of the antenna can be realized on the basis of ensuring miniaturization. And the antenna radiation surface has simple structure, reduces the processing error in the subsequent production process and is easy for mass production.
In one embodiment, the dielectric substrate includes a clearance area 10, and the main radiating branch 30, the coupling branch 40 and the C-shaped branch 50 are disposed in the clearance area 10. At this time, the main radiating branch 30, the coupling branch 40 and the C-shaped branch 50 can be far away from other metal objects, so as to realize metal shielding and eliminate interference.
In one embodiment, the miniaturized multi-band antenna further includes a graded-impedance microstrip feed line and a metal ground 20, the clearance area 10 and the metal ground 20 being disposed adjacent, the graded-impedance microstrip feed line being electrically connected to the main radiating branch 30, the graded-impedance microstrip feed line being disposed at the metal ground 20. The impedance matching of the antenna is further improved, and the radiation performance of the antenna is optimized, so that the transmission efficiency of the antenna is further improved, and the antenna can work in the Bluetooth and WiFi working frequency bands simultaneously.
In one embodiment, the length of the dielectric substrate is 18mm, the width of the dielectric substrate is 18.9mm, and the thickness of the dielectric substrate is 1.53 mm.
When the length of the dielectric substrate is 18mm and the width of the dielectric substrate is 18.9mm, the miniaturized multiband antenna can better work in a Bluetooth frequency band (2.4Ghz) and a WIFI frequency band (5.8Ghz), so that the near field and the far field of the antenna are clearly divided, and simulation and structural design are more convenient to perform.
In one embodiment, the main radiating branch 30 includes a U-shaped section and an L-shaped section, the coupling branch 40 is disposed in the middle of the U-shaped section, and forms an E-shaped section with the U-shaped section, and the coupling branch 40 is disposed at the position of 1/4 wavelengths in the second frequency band in the middle of the U-shaped section.
The main radiation branch 30 is a main radiator, the length of the main radiation branch is 22.55mm, the average value of 1/4 wavelengths of Bluetooth and WIFI frequency bands is generally used for calculation, and the reference range is 15 mm-30 mm. The main radiation branch 30 mainly works in a Bluetooth frequency band (2.4Ghz), the length and the position of the main radiation branch 30 mainly affect low-frequency radiation (2.4Ghz), and in addition, the C-shaped branch 50 is added at the corresponding position of the main radiation branch 30 relative to 1/4 wavelengths of a high-frequency radiation band (5.8Ghz), so that the impedance matching of the high-frequency radiation band can be improved, and the improvement of the antenna performance is realized.
In one embodiment, the C-shaped branch 50 comprises a first section, a second section and a third section which are connected in sequence, wherein the length of the first section is 3.15mm, and the width of the first section is 0.9 mm; the length of the second section is 6mm-8mm, and the width of the second section is 0.9 mm; the length of the third section is 4mm and the width of the third section is 0.9 mm.
Wherein, the coupling of the end of the main radiation branch 30 and the floor can be enhanced by arranging the C-shaped branch 50 structure. The size of the distributed capacitance is optimized by adjusting the length and width of the C-shaped branch 50, and further, the radiation performance of the antenna in a high-frequency band is optimized. When the length of the first section is 3.15mm, the width of the first section is 0.9 mm; the length of the second section is 6mm-8mm, and the width of the second section is 0.9 mm; when the length of the third section is 4mm and the width of the third section is 0.9mm, the optimization of the WIFI frequency band of the antenna is the most effective, and when the length of the second section is 6.5mm, the impedance optimization effect is the best.
In one embodiment, the U-shaped section comprises a fourth section, a fifth section and a sixth section which are connected in sequence; the length of the fourth section is 9mm, and the width of the fourth section is 1.8 mm; the length of the fifth section is 6.5mm, and the width of the fifth section is 1.8 mm; the length of the sixth section is 7.2mm and the width of the sixth section is 1.8 mm.
In the above embodiment, the U-shaped section and the coupling branch 40 form different distributed capacitances, which can achieve better impedance optimization, and when the selected value is the corresponding value in the above embodiment, the optimized impedance performance is the best.
In one embodiment, the L-shaped section comprises a seventh section and an eighth section which are connected in sequence; the length of the seventh section is 5.85mm, and the width of the seventh section is 1.8 mm; the length of the seventh section is 9mm and the width of the seventh section is 1.8 mm.
In the above embodiment, the L-shaped section and the coupling branch 40 form different distributed capacitances, so that better impedance optimization can be achieved, and when the selected value is the corresponding value in the above embodiment, the optimized impedance performance is the best.
In one embodiment, the length of the coupling branches 40 is 6mm to 8mm, and the width of the coupling branches 40 is 0.9 mm.
The coupling branch 40 has the function of impedance optimization in both the Bluetooth frequency band and the WIFI frequency band, and has the most effect in the optimization of the WIFI frequency band, and the reference range of the length of the coupling branch is 6-8 mm, wherein the length is optimal in 6.75 mm.
In summary, after the antenna is simulated, as shown in fig. 2, the transmission efficiency in the bluetooth frequency band and the WIFI frequency band is the best. On the basis of guaranteeing the miniaturization, optimize the radiation performance of antenna, make the antenna can work at bluetooth and wiFi working frequency channel simultaneously, and guarantee that the transmission efficiency of antenna is in the industry field level, can not reduce, still is superior to the industry field level at wiFi working frequency channel even.
In order to solve the above problem, the present invention also proposes an electronic device including the miniaturized multiband antenna as above.
It should be noted that, since the electronic device of the present invention includes all embodiments of the miniaturized multiband antenna, the electronic device of the present invention has all the advantages of the miniaturized multiband antenna, and further description thereof is omitted here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A miniaturized multi-band antenna, comprising:
a dielectric substrate;
the main radiation branch knot is arranged on the medium substrate and works in a first frequency band;
the coupling branch and the main radiation branch form a distributed capacitor so as to optimize the impedance matching of the main radiation branch in the first frequency band;
and the C-shaped branch node works in a second frequency band, is connected with the main radiation branch node, and performs impedance matching with the main radiation branch node so as to optimize the radiation performance of the antenna in the second frequency band.
2. The miniaturized multi-band antenna of claim 1, wherein the dielectric substrate includes a clearance area, the main radiating stub, the coupling stub, and the C-stub being disposed in the clearance area.
3. The miniaturized multi-band antenna of claim 2, further comprising a graded impedance microstrip feed line and a metal ground, the clearance zone and the metal ground being disposed adjacent, the graded impedance microstrip feed line being electrically connected to the main radiating stub, the graded impedance microstrip feed line being disposed at the metal ground.
4. The miniaturized multi-band antenna of claim 3, wherein the dielectric substrate has a length of 18mm, a width of 18.9mm, and a thickness of 1.53 mm.
5. The miniaturized multiband antenna according to claim 3, wherein the main radiating branch comprises a U-shaped section and an L-shaped section, the coupling branch is disposed at a middle portion of the U-shaped section to form an E-shaped section together with the U-shaped section, and the coupling branch is disposed at a position where 1/4 wavelengths of the second frequency band are located at the middle portion of the U-shaped section.
6. The miniaturized multi-band antenna of claim 3, wherein the C-shaped stub comprises a first section, a second section and a third section connected in sequence, the first section has a length of 3.15mm and a width of 0.9 mm; the length of the second section is 6mm-8mm, and the width of the second section is 0.9 mm; the length of the third section is 4mm, and the width of the third section is 0.9 mm.
7. The miniaturized multi-band antenna of claim 4, wherein the U-shaped section comprises a fourth section, a fifth section and a sixth section connected in sequence; the length of the fourth section is 9mm, and the width of the fourth section is 1.8 mm; the length of the fifth section is 6.5mm, and the width of the fifth section is 1.8 mm; the length of the sixth section is 7.2mm, and the width of the sixth section is 1.8 mm.
8. The miniaturized multi-band antenna of claim 4, wherein the L-shaped section comprises a seventh section and an eighth section connected in series; the length of the seventh section is 5.85mm, and the width of the seventh section is 1.8 mm; the length of the seventh section is 9mm, and the width of the seventh section is 1.8 mm.
9. The miniaturized multi-band antenna of claim 1, wherein the coupling stub has a length of 6mm to 8mm and a width of 0.9 mm.
10. An electronic device, characterized in that it comprises a miniaturized multiband antenna according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911425534.8A CN111082220A (en) | 2019-12-31 | 2019-12-31 | Miniaturized multiband antenna and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911425534.8A CN111082220A (en) | 2019-12-31 | 2019-12-31 | Miniaturized multiband antenna and electronic device |
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| CN111082220A true CN111082220A (en) | 2020-04-28 |
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| CN201911425534.8A Pending CN111082220A (en) | 2019-12-31 | 2019-12-31 | Miniaturized multiband antenna and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701459A (en) * | 2020-12-21 | 2021-04-23 | 昆山睿翔讯通通信技术有限公司 | Four-in-one antenna and communication terminal |
| CN114696081A (en) * | 2022-04-08 | 2022-07-01 | 苏州迈斯维通信技术有限公司 | Multi-order resonance high-isolation bandwidth cavity array antenna system and antenna unit |
-
2019
- 2019-12-31 CN CN201911425534.8A patent/CN111082220A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701459A (en) * | 2020-12-21 | 2021-04-23 | 昆山睿翔讯通通信技术有限公司 | Four-in-one antenna and communication terminal |
| CN112701459B (en) * | 2020-12-21 | 2023-06-23 | 昆山睿翔讯通通信技术有限公司 | Four-in-one antenna and communication terminal |
| CN114696081A (en) * | 2022-04-08 | 2022-07-01 | 苏州迈斯维通信技术有限公司 | Multi-order resonance high-isolation bandwidth cavity array antenna system and antenna unit |
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