CN217334384U - Smart home communication system, equipment and panel based on metal slot antenna - Google Patents
Smart home communication system, equipment and panel based on metal slot antenna Download PDFInfo
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- CN217334384U CN217334384U CN202220736347.2U CN202220736347U CN217334384U CN 217334384 U CN217334384 U CN 217334384U CN 202220736347 U CN202220736347 U CN 202220736347U CN 217334384 U CN217334384 U CN 217334384U
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Abstract
The utility model relates to an intelligent household communication system, equipment and panel based on a metal slot antenna, which comprises a slit antenna and a tuning network circuit; the slot antenna includes: the slit is arranged on the corresponding metal shell, the slit is filled with insulating materials, and the outer surface of the metal shell, corresponding to the peripheral part of the slit, is coated with the insulating materials; the radio frequency feed point is exposed and arranged on one side, corresponding to the slit, of the metal shell; the grounding point is exposed and arranged on the other side, corresponding to the slit, of the metal shell; the tuning network circuit is arranged on the corresponding PCB, the grounding end of the tuning network circuit is electrically connected to the grounding point, and the output end of the tuning network circuit is electrically connected to the radio frequency feed point.
Description
Technical Field
The utility model relates to an intelligence house field specifically indicates to have an intelligent house communication system, equipment, panel based on metal gap antenna.
Background
With the continuous expansion of the intelligent home industry scale, more and more intelligent devices such as intelligent panels, intelligent door locks, intelligent lamps and lanterns walk into ordinary families, and appearance, structure and function all present individualized, diversified development.
In order to pursue a better texture experience, the prior art starts to adopt a metal material or a surface metallization process to manufacture an intelligent household product so as to increase the metal luster and beautify the appearance; or improve intensity through embedding metal support in plastic materials, because the intelligent house product on the market is connected with other terminals through wireless mode (like protocols such as wiFi, bluetooth, zigBee), the metal material can greatly absorb the electromagnetic wave if the check keep off between the antenna, causes the decay of signal to influence the transmission of normal signal, make communication distance shorten and the signal is poor.
To the intelligent house communication system, equipment, panel of the problem design that foretell prior art exists based on metal slot antenna be the utility model discloses the purpose of research.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides an intelligent house communication system, equipment, panel based on metal slot antenna can effectively solve the problem that above-mentioned prior art exists.
The technical scheme of the utility model is that:
an intelligent home communication system based on a metal slot antenna comprises a slot antenna and a tuning network circuit;
the slot antenna includes: the slit is arranged on the corresponding metal shell, the slit is filled with insulating materials, and the outer surface of the metal shell, corresponding to the peripheral part of the slit, is coated with the insulating materials; the radio frequency feed point is exposed and arranged on one side of the metal shell corresponding to the slit; the grounding point is exposed and arranged on the other side, corresponding to the slit, of the metal shell;
the tuning network circuit is arranged on the corresponding PCB, the grounding end of the tuning network circuit is electrically connected to the grounding point, and the output end of the tuning network circuit is electrically connected to the radio frequency feed point.
Further, the length of the slit is 18-22 mm, and the width of the slit is 0.8-1.2 mm.
Further, the radio frequency feed point is arranged to be offset from a center line of the slit, and the grounding point is arranged to be offset from the center line of the slit.
Furthermore, the radio frequency feed point comprises a coaxial line, a shielding layer of the coaxial line is connected between the grounding end of the tuning network circuit and the grounding point, and an inner core of the coaxial line is connected between the output end of the tuning network circuit and the radio frequency feed point.
Further, the characteristic impedance of the coaxial line is 50 ohms.
Further, the tuning network circuit is a pi-type matching tuning network circuit or a T-type matching tuning network circuit.
Further, the impedance of the tuning network circuit is matched to the impedance of the slot antenna.
Further, a surface of the radio frequency feed point and/or the ground point is gold plated.
The intelligent household communication equipment based on the metal slot antenna comprises the intelligent household communication system based on the metal slot antenna.
The intelligent household communication panel based on the metal slot antenna comprises the intelligent household communication system based on the metal slot antenna.
The utility model has the advantages that:
this application has both realized the change of outward appearance minimum through setting up the slot antenna in intelligent house terminal, has also guaranteed the original intensity of metal to the at utmost, and is different with traditional cell-phone antenna, and the cell-phone frame is completely isolated the metal of each part, can not make the metal continuous, does not guarantee holistic intensity.
The tuning network arranged on the PCB board can flexibly adjust the resonance frequency point, and the antenna impedance matching with the terminal load is realized, so that the signals can be well received and sent, and the distance and the strength of wireless communication are ensured.
According to the smart home terminal, the slit antenna is formed by the parts of the metal shell of the smart home terminal, and the communication function of the smart home terminal can be effectively realized.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Fig. 2 is a sectional view taken along line a-a of fig. 1, which is also a structural schematic diagram of the slot antenna.
Fig. 3 is a schematic structural diagram of a tuning network circuit.
Fig. 4 is a schematic diagram illustrating a connection between a tuning network circuit and a slot antenna according to an embodiment.
Fig. 5 is experimental data of the effect of a simulated metal panel of an inverted-F antenna on a wireless signal.
Fig. 6 is experimental data of the effect of a simulated metal panel of a slot antenna on a wireless signal.
Detailed Description
To facilitate understanding for those skilled in the art, the structure of the present invention will now be described in further detail with reference to the following examples, in which:
example one
Referring to fig. 1-2, a smart home communication system based on a metal slot antenna includes a slot antenna 2 and a tuning network circuit 3;
in this embodiment, the slot antenna 2 is provided in the housing 1 of the smart home terminal, and the housing 1 is made of metal, or the housing 1 is made of metal plated on the outer surface. Meanwhile, the outer surface of the case 1 is painted for the sake of beauty and functions matching the case 1, or the strength is enhanced by constituting the case 1 by embedding a metal bracket in a plastic material.
The slot antenna 2 includes: the slits 201 are arranged in the corresponding metal shell 1, the slits 201 are filled with insulating materials, and the outer surface of the metal shell 1 corresponding to the peripheral part of the slits 201 is coated with the insulating materials; a radio frequency feed point 202 exposed on one side of the metal housing 1 corresponding to the slit 201; a grounding point 203 exposed and arranged on the other side of the metal shell 1 corresponding to the slit 201;
in this embodiment, the housing 1 is made of metal, and the outer surface of the housing 1 except for the portions corresponding to the slit 201, the rf feed point 202, and the grounding point 203 is coated with paint as an insulating material. The rf feed point 202 and the ground point 203 may be considered as corresponding points where a small space is scraped off at the original paint of the housing 1. Meanwhile, in the present application, the slot antenna 2 is not connected to the rf feed point 202 and the grounding point 203, and the rf feed point 202 and the grounding point 203 substantially belong to a part of the metal housing 1, so that the rf feed point 202 and the grounding point 203 are conducted on a direct current. The rf feed point 202 of the present embodiment is opened at the rear side of the slit 201, and the grounding point 203 is opened at the front side of the slit 201. The slit 201 is firstly formed in the shell 1, then the insulating materials with different dielectric constants are filled in the slit 201, and then the whole body is coated with films or painted, so that the consistency of the appearance can be achieved to the greatest extent, and the performance of the slit antenna 2 is also ensured. And the slit 201 may be opened on the back or side or front of the housing 1, which is not limited herein.
The tuning network circuit 3 is disposed on the corresponding PCB 4, a ground terminal 301 of the tuning network circuit 3 is electrically connected to the ground point 203, and an output terminal 302 of the tuning network circuit 3 is electrically connected to the rf feed point 202.
The tuning network circuit 3 in this embodiment can conveniently adjust the resonant frequency point of the slot antenna 2 by adjusting the parameters of the circuit. For example, the tuning network circuit 3 includes a plurality of adjustable resistors, and the resonance frequency point is adjusted by adjusting the resistance of the resistors.
Further, the length of the slit 201 is 18-22 mm, and the width of the slit 201 is 0.8-1.2 mm. In this embodiment, the length of the slit 201 is 20mm, the width of the slit 201 is 1mm, and the inventor's experiment shows that the slit 201 has the length of 20mm and the width of 1mm, and the slit antenna 2 has the best effect.
Further, the radio frequency feed point is arranged to be offset from a center line of the slit, and the grounding point is arranged to be offset from the center line of the slit. Two points placed in the center can know that the characteristic impedance is far more than 50 omega according to the principle of an ideal slot antenna, and are not beneficial to signal transmission and tuning, so that the two points need to be deviated from the center position, and the two points can be arranged on the left and right according to the symmetry principle without limitation.
Further, referring to fig. 3, in the present embodiment, a coaxial cable 6 is included, a shielding layer of the coaxial cable 6 is connected between the ground terminal 301 of the tuning network circuit 3 and the ground point 203, and an inner core of the coaxial cable 6 is connected between the output terminal 302 of the tuning network circuit 3 and the rf feed point 202. The characteristic impedance of the coaxial line 6 is 50 ohms. The coaxial cable 6 with the characteristic impedance of 50 ohms is connected in the embodiment in a welding mode, and the coaxial cable has the advantages of firm wiring and better performance consistency.
Further, the tuning network circuit 3 is a pi-type matching tuning network circuit or a T-type matching tuning network circuit. The pi-type matching tuning network circuit or the T-type matching tuning network circuit is a matching network with a higher Q value than the L-type network, and the pi-type matching tuning network circuit or the T-type matching tuning network circuit can be realized in the types of high pass, low pass and band pass, so that the performances of the slit antenna 2 are matched.
Further, the impedance of the tuning network circuit 3 is matched to the impedance of the slot antenna 2. The antenna impedance matching with the terminal load is realized, the signal is well received and transmitted, and the distance and the strength of wireless communication are ensured.
In another embodiment, the surface of the rf feed point 202 and/or the ground point 203 is gold plated. The metal surfaces of the radio frequency feed point 202 and the grounding point 203 on the metal shell are plated with gold, and meanwhile, the gold-plated elastic sheet is placed on the PCB, so that the installation is simple, the loss caused by the wire of the coaxial line is saved, and the cost is reduced.
In another embodiment, the tuning network circuit 3 may also be connected to the slot antenna 2 through an IPEX mount, and different characteristic impedances may be obtained by adjusting the position of the feed point, so that the direct connection of the dome may be realized, and a matching network may be omitted under the condition of appropriate characteristic impedance, thereby saving cost.
Example two
The intelligent household communication equipment based on the metal slot antenna comprises the intelligent household communication system based on the metal slot antenna.
EXAMPLE III
The utility model provides an intelligent house communication panel based on metal slot antenna, includes an intelligent house communication system based on metal slot antenna.
Experimental data
The data on the left side of fig. 5 is an analog simulation picture of a common PCB inverted F antenna on the market, the three-dimensional directional diagram of the antenna is similar to the theoretical "apple diagram", a ZOX plane (red curve) and a YOZ plane (black curve) two-dimensional gain diagram are selected on the cross section, the maximum gain of the ZOX plane is 2.8dB, and the gain of 0 ° is 2.3 dB.
If a panel of iron material, 86mm x 1mm gauge, is added 5mm directly in front, a significant reduction in gain directly in front can be seen from the three-dimensional pattern, with a ZOX plane maximum gain of 6.9dB, measured at about 180 degrees, and a 0 degree gain of-12.6 dB. Although the maximum gain is improved, the maximum gain is realized at 180 degrees, in an actual use scene, the panel is arranged in a wall, and the effective radiation surface is in the direction of the panel, so that the metal panel has great influence on the antenna.
The experimental data of the present application are shown in fig. 6, where the maximum gain of the ZOX plane is 5.8dB, i.e. measured in the 0 ° direction, the directivity is better and the forward gain can be greatly improved.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made within the scope of the claims of the present invention should belong to the scope of the present invention.
Claims (10)
1. The utility model provides an intelligence house communication system based on metal slot antenna which characterized in that: the antenna comprises a slit antenna and a tuning network circuit;
the slot antenna includes: the slit is arranged on the corresponding metal shell, the slit is filled with insulating materials, and the outer surface of the metal shell, corresponding to the peripheral part of the slit, is coated with the insulating materials; the radio frequency feed point is exposed and arranged on one side of the metal shell corresponding to the slit; the grounding point is exposed and arranged on the other side, corresponding to the slit, of the metal shell;
the tuning network circuit is arranged on the corresponding PCB, the grounding end of the tuning network circuit is electrically connected to the grounding point, and the output end of the tuning network circuit is electrically connected to the radio frequency feed point.
2. The smart home communication system based on the metal slot antenna as claimed in claim 1, wherein: the length of the slit is 18-22 mm, and the width of the slit is 0.8-1.2 mm.
3. The smart home communication system based on the metal slot antenna as claimed in claim 1, wherein: the radio frequency feed point is arranged to deviate from the central line of the slit, and the grounding point is arranged to deviate from the central line of the slit.
4. The smart home communication system based on metal slot antenna of claim 1, wherein: the coaxial cable comprises a coaxial cable, wherein a shielding layer of the coaxial cable is connected between the grounding end of the tuning network circuit and the grounding point, and an inner core of the coaxial cable is connected between the output end of the tuning network circuit and the radio frequency feed point.
5. The smart home communication system based on the metal slot antenna as claimed in claim 4, wherein: the characteristic impedance of the coaxial line is 50 ohms.
6. The smart home communication system based on the metal slot antenna as claimed in claim 1, wherein: the tuning network circuit is a pi-type matching tuning network circuit or a T-type matching tuning network circuit.
7. The smart home communication system based on the metal slot antenna as claimed in claim 1, wherein: the impedance of the tuning network circuit is matched with the impedance of the slot antenna.
8. The smart home communication system based on the metal slot antenna as claimed in claim 1, wherein: the surface of the radio frequency feed point and/or the ground point is plated with gold.
9. The utility model provides an intelligence house communications facilities based on metal slot antenna which characterized in that: the smart home communication system based on the metal slot antenna comprises any one of claims 1-8.
10. The utility model provides an intelligence house communication panel based on metal slot antenna which characterized in that: the smart home communication system based on the metal slot antenna comprises any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220736347.2U CN217334384U (en) | 2022-03-31 | 2022-03-31 | Smart home communication system, equipment and panel based on metal slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220736347.2U CN217334384U (en) | 2022-03-31 | 2022-03-31 | Smart home communication system, equipment and panel based on metal slot antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217334384U true CN217334384U (en) | 2022-08-30 |
Family
ID=83002378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220736347.2U Active CN217334384U (en) | 2022-03-31 | 2022-03-31 | Smart home communication system, equipment and panel based on metal slot antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217334384U (en) |
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2022
- 2022-03-31 CN CN202220736347.2U patent/CN217334384U/en active Active
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Address after: Unit 403-12, 4th Floor, No. 56, Chengyi North Street, Phase III, Software Park, Torch High-tech Zone, Xiamen, Fujian 361000 Patentee after: XIAMEN LEELEN TECHNOLOGY Co.,Ltd. Address before: 2-5 / F, 780 Tieshan Road, Guankou Town, Jimei District, Xiamen City, Fujian Province 361021 Patentee before: XIAMEN LEELEN TECHNOLOGY Co.,Ltd. |