CN219717256U - Miniaturized dual-frenquency printing antenna - Google Patents
Miniaturized dual-frenquency printing antenna Download PDFInfo
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- CN219717256U CN219717256U CN202320866630.1U CN202320866630U CN219717256U CN 219717256 U CN219717256 U CN 219717256U CN 202320866630 U CN202320866630 U CN 202320866630U CN 219717256 U CN219717256 U CN 219717256U
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- 239000002184 metal Substances 0.000 claims abstract description 34
- 230000005855 radiation Effects 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of antennas and discloses a miniaturized dual-frequency printed antenna, which comprises a dielectric substrate, an inverted F-shaped radiation branch, an input feeder and a metal floor with a rectangular groove and a triangular groove, wherein the radiation branch is an inverted F-shaped antenna positioned on the front surface of the dielectric substrate, the impedance matching input feeder is a feed end of the inverted F branch and is used for feeding and impedance matching of external current, the back surface of the dielectric substrate is a defect gap structure with rectangular and triangular grooves, the antenna covers dual-frequency bands by compact front and back surface design, the size of the antenna is reduced, and the broadband and high gain of the printed antenna can meet the common wireless communication requirements of WLAN 2.4GHz frequency band and 5GHz frequency band specified by IEEE802.11a/b/g, bluetooth, zigbee and the like.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to a miniaturized dual-frequency printed antenna.
Background
With the rapid development of the internet of things and information communication technology, people's life style becomes more intelligent, digital and virtualized. People have a stronger dependence on wireless communication technology, and intelligent wireless communication equipment is developed towards miniaturization and portability.
Currently, the single frequency band cannot meet the development requirement, so that the frequency of the antenna tends to develop in multiple frequencies; the design of the antenna is more complicated for more multifrequency and broadband, and the antenna structure and the graphic design are more difficult to manufacture; and the pursuit of small-sized antennas causes the antenna gain to be affected, so that it is difficult to make the antenna satisfy more frequencies and wider frequency bands while ensuring the antenna gain.
Disclosure of Invention
The present utility model is directed to a miniaturized dual-band antenna that overcomes the above-mentioned deficiencies of the prior art.
In order to solve the technical problems, the utility model provides the following technical scheme for solving the problems:
the utility model relates to a miniaturized dual-frequency printed antenna which comprises a medium substrate and a metal floor, wherein the medium substrate is stuck with the metal floor, an improved inverted-F radiation branch and an impedance matching input feeder line are arranged on the medium substrate, the improved inverted-F radiation branch is connected with the impedance matching input feeder line, the metal floor is provided with a rectangular groove and a triangular groove, and the rectangular groove and the triangular groove are connected into a whole.
The dielectric substrate is made of FR-4 (glass fiber epoxy resin) material.
The improved inverted-F radiation branch joint is provided with a first horizontal rectangular structure, a second horizontal rectangular structure and a vertical rectangular short-circuited end, wherein the first horizontal rectangular structure and the second horizontal rectangular structure are separated through impedance matching input feeder line connection, and the second horizontal rectangular structure is vertically connected with the vertical rectangular short-circuited end.
The improved inverted-F radiation branch joint is provided with a first horizontal rectangular structure, a second horizontal rectangular structure and a vertical rectangular short-circuited end, wherein the first horizontal rectangular structure and the second horizontal rectangular structure are separated through impedance matching input feeder line connection, and the second horizontal rectangular structure is vertically connected with the vertical rectangular short-circuited end. 4. A miniaturized dual-band printed antenna according to claim 3, wherein the first horizontal rectangular structure is parallel to the metal floor at a distance of 4.7mm from the upper end of the metal floor; the length of a vertical rectangular short-circuited end is 8mm; the left end of the vertical rectangular short-circuited end is connected with the second horizontal rectangular structure, and the right end of the vertical rectangular short-circuited end is kept flush with the upper end of the metal floor; the total length of the first horizontal rectangular structure and the second horizontal rectangular structure was 14.6mm.
The impedance matching input feeder is a rectangular microstrip feeder; the rectangular microstrip line is vertically arranged, the upper end of the rectangular microstrip line is connected with the horizontal rectangular structure of the improved inverted-F radiation branch knot, and the distance between the lower end of the rectangular microstrip line and the horizontal rectangular structure of the improved inverted-F radiation branch knot is 10.1mm.
The rectangular groove and the triangular groove are formed in the metal ground; the rectangular groove comprises a first rectangular groove, a second rectangular groove and a third rectangular groove when seen from the bottom surface of the medium substrate, the triangular groove comprises a first triangular groove and a second triangular groove, the distance between the upper end of the second rectangular groove and the upper end of the metal ground is 0.5mm, the left end of the second rectangular groove is connected with the first rectangular groove, and the right end of the second rectangular groove is connected with the third rectangular groove; the distance between the upper end of the third rectangular groove and the upper end of the metal ground is 1.1mm, the left end of the third rectangular groove is connected with the second rectangular groove, the upper end of the third rectangular groove is connected with the first triangular groove, and the lower end of the third rectangular groove is connected with the second triangular groove.
The second rectangular groove is based on a gap structure in a metal floor below a medium substrate, and the coverage area of the second rectangular groove and an impedance matching input feeder printed above the medium substrate in a vertical space is 0.5 x 3.5mm.
Compared with the prior art, the utility model has the following advantages:
the utility model cuts grooves on the floor and uses one feeder line to meet the feeding requirements of two frequency bands, thereby reducing the size of the antenna and realizing the miniaturization of the antenna.
The bandwidth and gain of the antenna are increased by improving the size of the inverted-F antenna and the design form of the metal floor slot.
And the triangular groove is designed on the basis of adding the rectangular groove on the metal floor so as to realize gradual change patterns, so that the bandwidth of the antenna in a high-frequency band area is obviously increased.
The antenna has simple structural design and is easy to manufacture and produce.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments of the present utility model or the prior art will be briefly described below, and it is obvious that the drawings described below are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Figure 1 is a top view of a miniaturized dual-band printed antenna according to the present utility model,
figure 2 is a bottom surface view of a miniaturized dual-frequency printed antenna,
FIG. 3 is a side view of a miniaturized dual-frequency printed antenna;
figure 4 is a schematic dimensional view of a surface map of a miniaturized dual-band printed antenna according to the present utility model,
figure 5 is a schematic dimensional view of the lower surface of the antenna,
fig. 6 is a schematic enlarged size view of a slot structure of the lower surface of the antenna;
FIG. 7 is a simulation diagram of the S11 parameters of a miniaturized dual-band printed antenna of the present utility model;
figure 8 is a radiation pattern at 2.45GHz for a miniaturized dual-band printed antenna of the present utility model,
FIG. 9 is a radiation pattern at 5.5GHz of a miniaturized dual-band printed antenna of the present utility model;
figure 10 is a graph of gain at 2.45GHz for a miniaturized dual-band printed antenna of the present utility model,
FIG. 11 is a graph of gain at 5.5GHz for a miniaturized dual-band printed antenna of the present utility model;
wherein, each reference sign is explained as follows:
the novel antenna comprises a 1-dielectric substrate, a 2-improved inverted F radiation branch, a 21-inverted F antenna long arm, a 22-antenna feeder and a short-circuit end distance, a 23-antenna short-circuit end, a 3-impedance matching feeder, a 4-rectangular opening groove, a 41-first rectangular groove, a 42-second rectangular groove, a 43-third rectangular groove, a 5-triangular groove, a 51-first triangular groove, a 52-second triangular groove and a 6-antenna metal floor.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Fig. 1 is a schematic structural diagram of a miniaturized dual-frequency printed antenna according to the present utility model, wherein (a) is an upper surface diagram of the antenna, (b) is a lower surface diagram of the antenna, and (c) is a side view of the antenna.
In this embodiment, as shown in fig. 1 to 3, the structural schematic diagram of the miniaturized dual-frequency printed antenna provided by the utility model includes a dielectric substrate 1, an improved inverted-F radiation branch 2 and an impedance matching input feeder 3 printed on the upper surface thereof, and a metal floor 6 with rectangular grooves 4 and triangular grooves 5 printed on the lower surface thereof; the dielectric substrate 1 is an FR-4 (glass fiber epoxy) material.
As shown in fig. 1, the improved inverted-F radiation branch has a first horizontal rectangular structure 21, a second horizontal rectangular structure 22, and a vertical rectangular short-circuited end 23; wherein the first horizontal rectangular structure 21 is parallel to the metal floor 6 and has a distance of 4.7mm from the upper end of the metal floor 6; one end of the second horizontal rectangular structure 22 is connected with the first horizontal rectangular structure 21, and the other end is connected with the vertical rectangular short-circuited end 23, and the length of the second horizontal rectangular structure is 8mm; the vertical rectangular short-circuited end 23 is connected at one end to the second horizontal rectangular structure 22 and at the other end is kept flush with the upper end of the metal floor 6.
The impedance matching input feeder 3 is a rectangular microstrip feeder, the rectangular microstrip is vertically arranged, the upper end of the impedance matching input feeder is connected with the horizontal rectangular structure 21 of the improved inverted-F radiation branch, and the distance between the lower end of the impedance matching input feeder and the horizontal rectangular structure 21 of the improved inverted-F radiation branch is 10.1mm.
As shown in fig. 2, the metal floor 6 is provided with a rectangular groove and a triangular groove; the medium substrate 1 includes a first rectangular groove 41, a second rectangular groove 42, a third rectangular groove 43, a first triangular groove 51, and a second triangular groove 52, viewed from the bottom of the medium substrate.
The distance between the upper end of the first rectangular groove 41 and the upper end of the metal ground 6 is 0.05mm, and the right end of the first rectangular groove 41 is connected with the second rectangular groove 42; the distance between the upper end of the second rectangular groove 42 and the upper end of the metal ground 6 is 0.5mm, the left end of the second rectangular groove 42 is connected with the first rectangular groove 41, and the right end is connected with the third rectangular groove 43; the distance between the upper end of the third rectangular groove 43 and the upper end of the metal ground 6 is 1.1mm, the left end of the third rectangular groove 43 is connected with the second rectangular groove 42, the upper end is connected with the first triangular groove 51, and the lower end is connected with the second triangular groove 52.
The second rectangular groove 42 is based on a slit structure in the metal floor 6 below the dielectric substrate 1, and covers a vertical space of 0.5×3.5mm with the impedance matching input feeder 3 printed above the dielectric substrate.
As shown in fig. 3, the metal floor 6 is located on the right side of the dielectric substrate 1 and is closely attached to the dielectric substrate 1, so that the antenna generates stable electromagnetic wave radiation.
As shown in fig. 4 to 6, in the present embodiment, the dielectric substrate 1 used is FR-4 material, the relative dielectric constant is er=4.4, the thickness subh=0.8 mm, and the specific geometry thereof is L:14.6mm; h is 4.7mm; s is 8mm; w is 0.5mm; gndX 50mm; gndY 63.1mm; lg=20 mm; h2 is 10.1mm; l1 is 1mm; l2 is 2.5mm; l3 is 8.7mm; l4 is 11.1mm; l5 is 11mm; w1 is 4.4mm; w2 is 3.5mm; w3 is 1.7mm; w4 is 1.4mm; w5 is 1mm.
The miniaturized dual-frequency printed antenna according to the above embodiment is subjected to simulation test, and the test result is shown in fig. 7, and it can be seen from the test result that the antenna has a bandwidth of 2.28-2.57GHz in the low frequency band, a relative bandwidth of 16.9%, a bandwidth of 5.14-5.92GHz in the high frequency band, and a relative bandwidth of 13.24% under the condition that the reflection coefficient S11 is less than or equal to-10 dB, and the antenna not only has a dual-frequency condition, but also has a relatively wide bandwidth. The result shows that the antenna can cover WLAN 2.4GHz frequency band and 5GHz frequency band specified by IEEE802.11a/b/g, and can meet the requirements of Bluetooth and Zigbee frequency bands.
The radiation patterns of the miniaturized dual-frequency printed antenna of the present embodiment on the E-plane (xoz-plane) and the H-plane (xoy-plane) of 2.45GHz and 5.5GHz were subjected to simulation test, wherein fig. 8 is a radiation pattern of 2.45GHz on the E-plane and the H-plane, and fig. 9 is a radiation pattern of 5.5GHz on the E-plane and the H-plane. As can be seen from fig. 8, the antenna has relatively good radiation characteristics at 5.5GHz, and does not radiate strictly omnidirectionally in the 2.45GHz radiation direction, but radiates well in some directions, and radiates relatively weakly in some directions. Such as radiation in the 30 deg. vicinity, 150 deg. vicinity and-90 deg. direction of the H-plane, while directivity at other angles is relatively good, while radiation in the 90 deg. direction of the E-plane is weak, but the antenna radiation effect is good as a whole.
The gain of the miniaturized dual-band printed antenna of this example was tested, and the results are shown in fig. 10 and 11, where fig. 10 is a gain chart at 2.45GHz and fig. 11 is a gain chart at 5.5 GHz. In this embodiment, the gain measured in the 2.45GHz band is up to 3.01dBi, and the gain measured in the 5.5GHz band is up to 5.35dBi.
In summary, the miniaturized dual-band printed antenna of the embodiment can realize dual-band, and achieve wider bandwidth and meet the requirements of S11 parameters of each band; the antenna can achieve relatively good radiation in the working frequency band, has higher gain and good antenna performance; the antenna has relatively small overall size, meets the miniaturization requirement of the antenna, has a simple structure, and is easy to produce and manufacture.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (7)
1. The utility model provides a miniaturized dual-frenquency printed antenna, its characterized in that includes medium base plate, metal floor, and medium base plate pastes metal floor, is equipped with improved generation reverse F radiation branch knot, impedance matching input feeder on the medium base plate, and improved generation reverse F radiation branch knot is connected with impedance matching input feeder, and metal floor is equipped with rectangular channel and triangle-shaped groove, and rectangular channel and triangle-shaped groove are connected integratively.
2. The miniaturized dual-band printed antenna of claim 1 wherein the dielectric substrate is a fiberglass epoxy material.
3. The miniaturized dual-band printed antenna of claim 1 wherein the modified inverted-F radiating stub has a first horizontal rectangular structure, a second horizontal rectangular structure, a vertical rectangular shorting end, the first horizontal rectangular structure, the second horizontal rectangular structure separated by an impedance matching input feed line connection, the second horizontal rectangular structure being vertically connected to the vertical rectangular shorting end.
4. A miniaturized dual-band printed antenna according to claim 3, wherein the first horizontal rectangular structure is parallel to the metal floor at a distance of 4.7mm from the upper end of the metal floor; the length of a vertical rectangular short-circuited end is 8mm; the left end of the vertical rectangular short-circuited end is connected with the second horizontal rectangular structure, and the right end of the vertical rectangular short-circuited end is kept flush with the upper end of the metal floor; the total length of the first horizontal rectangular structure and the second horizontal rectangular structure was 14.6mm.
5. The miniaturized dual-frequency printed antenna of claim 1 wherein the impedance matching input feed line is a rectangular microstrip feed line; the rectangular microstrip line is vertically arranged, the upper end of the rectangular microstrip line is connected with the horizontal rectangular structure of the improved inverted-F radiation branch knot, and the distance between the lower end of the rectangular microstrip line and the horizontal rectangular structure of the improved inverted-F radiation branch knot is 10.1mm.
6. The miniaturized dual-band printed antenna of claim 1, wherein the metal floor is provided with rectangular and triangular grooves; the rectangular groove comprises a first rectangular groove, a second rectangular groove and a third rectangular groove when seen from the bottom surface of the medium substrate, the triangular groove comprises a first triangular groove and a second triangular groove, the distance between the upper end of the second rectangular groove and the upper end of the metal floor is 0.5mm, the left end of the second rectangular groove is connected with the first rectangular groove, and the right end of the second rectangular groove is connected with the third rectangular groove; the distance between the upper end of the third rectangular groove and the upper end of the metal floor is 1.1mm, the left end of the third rectangular groove is connected with the second rectangular groove, the upper end of the third rectangular groove is connected with the first triangular groove, and the lower end of the third rectangular groove is connected with the second triangular groove.
7. The miniaturized dual-band printed antenna of claim 6, wherein the second rectangular slot is a slot structure in a metal floor based on the back side of the dielectric substrate, and the coverage area of the impedance matching input feed line printed on the front side of the dielectric substrate in the vertical space is 0.5 x 3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866630.1U CN219717256U (en) | 2023-04-18 | 2023-04-18 | Miniaturized dual-frenquency printing antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320866630.1U CN219717256U (en) | 2023-04-18 | 2023-04-18 | Miniaturized dual-frenquency printing antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219717256U true CN219717256U (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320866630.1U Active CN219717256U (en) | 2023-04-18 | 2023-04-18 | Miniaturized dual-frenquency printing antenna |
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| Country | Link |
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| CN (1) | CN219717256U (en) |
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- 2023-04-18 CN CN202320866630.1U patent/CN219717256U/en active Active
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