CN211320329U - Miniaturized multiband antenna and electronic device - Google Patents
Miniaturized multiband antenna and electronic device Download PDFInfo
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- CN211320329U CN211320329U CN201922495895.1U CN201922495895U CN211320329U CN 211320329 U CN211320329 U CN 211320329U CN 201922495895 U CN201922495895 U CN 201922495895U CN 211320329 U CN211320329 U CN 211320329U
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Abstract
The utility model discloses a miniaturized multiband antenna and electronic equipment, miniaturized multiband antenna include medium base plate, main radiation minor matters, coupling minor matters and C type minor matters, main radiation minor matters set up in on the medium base plate to work in first frequency channel, coupling minor matters with main radiation minor matters forms distributed capacitance, is in with optimizing main radiation minor matters the impedance matching of first frequency channel. 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 utility model is used for solve current antenna system and need pass through the technical problem of two antennas when realizing two work frequency channels of wiFi and bluetooth.
Description
Technical Field
The utility model relates to a signal transmission technical field, in particular to miniaturized multiband antenna and electronic equipment.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a miniaturized multiband antenna aims at solving the great technical problem of volume when current antenna system simultaneous working is at the working frequency channel of two differences.
To achieve the above object, the present invention provides 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 further provides an electronic device including the miniaturized multiband antenna as described above.
The utility model discloses a set up dielectric substrate, main radiation minor matters, coupling minor matters and C type minor matters at miniaturized multiband antenna, wherein, main radiation minor matters set up in on the dielectric substrate, and work in first frequency channel, coupling minor matters with main radiation minor matters form distributed capacitance, in order to optimize the impedance matching of main radiation minor matters at the first frequency channel, C type minor matters work in the second frequency channel, with main radiation minor matters is connected, and carry out impedance matching with main radiation minor matters, in order to optimize the radiation performance of antenna at the second frequency channel, thereby make only adopt an antenna, reduced the antenna area occupied, the antenna divide to establish different minor matters can realize that the antenna works in two frequency channels simultaneously, and through effectively improving antenna impedance, above-mentioned scheme utilizes many minor matters antenna combined action, the cooperation coupling forms the resonance at high low frequency point department, creative use C type minor matters to carry out 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 needed to be 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 structural diagram of a miniaturized multiband antenna according to the present invention;
fig. 2 is a schematic diagram of simulation results of the miniaturized multiband antenna according to the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a miniaturized multiband antenna for solve the limited technical problem of current driver chip driving force.
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 further provides an electronic device including the miniaturized multiband antenna as above.
It should be noted that, because the electronic device of the present invention includes all the embodiments of the miniaturized multiband antenna, the electronic device of the present invention has all the advantages of the miniaturized multiband antenna, and is not repeated herein.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection 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 5, 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 5, 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922495895.1U CN211320329U (en) | 2019-12-31 | 2019-12-31 | Miniaturized multiband antenna and electronic device |
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| CN201922495895.1U CN211320329U (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 |
|---|---|---|---|---|
| CN111987408A (en) * | 2020-08-21 | 2020-11-24 | 福耀玻璃工业集团股份有限公司 | Antenna structure, antenna glass assembly and vehicle |
| CN113809529A (en) * | 2021-08-03 | 2021-12-17 | 北京邮电大学 | Dual-band impedance matching microstrip antenna and antenna array |
-
2019
- 2019-12-31 CN CN201922495895.1U patent/CN211320329U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987408A (en) * | 2020-08-21 | 2020-11-24 | 福耀玻璃工业集团股份有限公司 | Antenna structure, antenna glass assembly and vehicle |
| CN111987408B (en) * | 2020-08-21 | 2021-10-19 | 福耀玻璃工业集团股份有限公司 | Antenna structure, antenna glass assembly and vehicle |
| CN113809529A (en) * | 2021-08-03 | 2021-12-17 | 北京邮电大学 | Dual-band impedance matching microstrip antenna and antenna array |
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