CN210607609U - Novel automobile PKE low-frequency antenna - Google Patents
Novel automobile PKE low-frequency antenna Download PDFInfo
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- CN210607609U CN210607609U CN201922097463.5U CN201922097463U CN210607609U CN 210607609 U CN210607609 U CN 210607609U CN 201922097463 U CN201922097463 U CN 201922097463U CN 210607609 U CN210607609 U CN 210607609U
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- ferrite
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- pke
- enameled
- frequency antenna
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Abstract
The utility model relates to a novel automobile PKE low-frequency antenna, which is provided with ferrite, an enameled coil, an antenna shell and an antenna connector; the ferrite, the enameled coil and the antenna shell are arranged from inside to outside; the antenna connector is welded with the end part of the ferrite extending out of the enameled wire; the upper side and the lower side of the ferrite sleeved with the enameled coil are both provided with FR4 epoxy boards in a clinging manner, and the ferrite and the epoxy boards are sleeved with a heat-shrinkable sleeve for wrapping after being clinged tightly; and high-elasticity pur polyurethane glue is filled in gaps among the ferrite, the epoxy plate and the shell. The utility model discloses directly reduced the use quantity of car PKE low frequency antenna, greatly reduced whole car arrange with the degree of difficulty and the loaded down with trivial details degree of installation.
Description
Technical Field
The utility model relates to an antenna technology field, in particular to novel car PKE low frequency antenna.
Background
The low-frequency antenna used in the conventional automobile keyless entry system (PKE) is weak in signal strength, so that 1 low-frequency antenna needs to be installed in each door including a trunk, which results in too many antennas and higher cost, and the arrangement and installation of the antennas in the automobile are more difficult and cumbersome.
Therefore, the novel automobile PKE low-frequency antenna is optimally designed, and the basic design principle is as follows: form the inductance through the mode that the enameled copper wire twined into the coil outside the ferrite, the whole of ferrite coil is packed into in the antenna plastic casing and sealed with the embedment of polyurethane glue, the head and the tail of enameled wire extend out and with two terminal welding of antenna connector by the same end of ferrite to realize being connected with outside. The ferrite material is selected to be mu in the range of 2000-3000. Compared with the traditional antenna, the novel PKE antenna has the advantage that the magnetic field intensity is greatly enhanced by over 88dB mu A/m. And the magnetic field intensity of the existing automobile PKE low-frequency antenna is only 79-80dB mu A/m.
Disclosure of Invention
The utility model aims at overcoming the defect that prior art exists, providing a direct use quantity that has reduced car PKE low frequency antenna, greatly reduced whole car arrange with the degree of difficulty of installation and loaded down with trivial details degree novel car PKE low frequency antenna.
Realize the utility model discloses the technical scheme of purpose is: a novel automobile PKE low-frequency antenna is provided with a ferrite, an enameled coil, an antenna shell and an antenna connector; the ferrite, the enameled coil and the antenna shell are arranged from inside to outside; the antenna connector is welded with the end part of the ferrite extending out of the enameled wire; the upper side and the lower side of the ferrite sleeved with the enameled coil are both provided with FR4 epoxy boards in a clinging manner, and the ferrite and the epoxy boards are sleeved with a heat-shrinkable sleeve for wrapping after being clinged tightly; and high-elasticity pur polyurethane glue is filled in gaps among the ferrite, the epoxy plate and the shell.
The FR4 epoxy board has a width consistent with that of ferrite and a length slightly shorter than that of ferrite.
The thickness of the FR4 epoxy plate in the technical scheme is 1-2mm (1.6 mm is selected at present).
According to the technical scheme, the enameled wire is wound in a mode that two ends are dense and the middle is sparse, and enameled coils are wound on ferrite in a crossed mode.
After the technical scheme is adopted, the utility model discloses following positive effect has:
(1) the utility model directly reduces the using quantity of the automobile PKE low-frequency antenna, and greatly reduces the difficulty and the complexity of the whole automobile arrangement and installation;
(2) the total cost of the low-frequency antenna is reduced by about 40 percent compared with the conventional state because the number of the PKE low-frequency antennas is reduced;
(3) the utility model discloses add FR4 epoxy board in the ferrite both sides, irritate high elasticity pur polyurethane glue simultaneously in the clearance with the shell, play buffering cushioning effect protection ferrite and prevent to fall or vibrations and break off.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an exploded view of the present invention.
Detailed Description
(example 1)
Referring to fig. 1 and 2, the present invention has a ferrite 1, an enameled coil 2, an antenna case 3, and an antenna connector 4; the ferrite 1, the enameled coil 2 and the antenna shell 3 are arranged from inside to outside; the antenna connector 4 is welded with the end part of the ferrite 1 extending out of the enameled wire; the upper side and the lower side of the ferrite 1 sleeved with the enameled coil 2 are both provided with FR4 epoxy boards 5 in a clinging manner, and the ferrite 1 and the epoxy boards 5 are sleeved with a heat-shrinkable sleeve 6 for wrapping after clinging tightly; and high-elasticity pur polyurethane glue 7 is filled in gaps among the ferrite 1, the epoxy plate 5 and the shell 3.
The FR4 epoxy board 5 has a width corresponding to ferrite 1 and a length slightly shorter than ferrite 1.
The thickness of the FR4 epoxy board 5 is between 1-2mm (1.6 mm is currently selected).
The winding mode of the enameled wire is that two ends are dense and the middle is sparse, the enameled coil 2 is wound on the ferrite 1 in a crossed mode, and the enameled wire is made of 0.25mm polyurethane enameled wire (1 UEW/180).
The utility model discloses improved on prior art's design, mainly strengthened the magnetic field intensity of antenna, the magnetic field intensity of novel antenna can reach more than 88dB mu A/m, is far away from the magnetic field intensity 79-80dB mu A/m of conventional low frequency antenna, the electrical property parameter requirement of antenna (under the room temperature condition): l =545 μm h +/-1.5%, R =2.8+/-20%, Qmax >107, magnetic field strength >88dB μ A/m.
The specific design key points are as follows: the length of the ferrite 1 is mainly increased (3-4 times of the length of the ferrite 1 of the conventional antenna), and the size of the ferrite 1 improved at present is as follows: the length is 200-226.5mm, the width is 12.5mm, the height is 4mm, the material of ferrite 1 is MnZn, mu >1300 (mu is in the range of 2000-3000 at present);
because the ferrite 1 after the improvement design is longer and is easy to break after falling, the design must consider the reinforcement protection of the ferrite 1, and the FR4 epoxy boards 5 (the width of the epoxy board 5 is the same as that of the ferrite 1, and the length is slightly shorter than that of the ferrite 1, 1-2mm (1.6 mm is selected at present)) are added on both sides of the ferrite 1, and the ferrite 1 and the epoxy board 5 are tightly adhered and then tightly wrapped by a heat-shrinkable sleeve.
Meanwhile, high-elasticity pur polyurethane glue (the model is Wevopur139+ Wevonat300 or Wevopur323+ Wevonat 300) is filled in the gap between the ferrite 1 and the epoxy plate 5 and the shell 3, so that the buffering and shock absorption effects are achieved, and the ferrite 1 is protected from falling or breaking caused by vibration;
this design can guarantee that the antenna satisfies the drop test requirement of high strength: the electrical performance of the antenna is normal after the height of 1 m/concrete ground and two random faces are subjected to drop tests, and the ferrite 1 does not have any fracture phenomenon after the product is dissected; meanwhile, the sealing effect on the interior of the antenna can be enhanced after polyurethane sealing, and the antenna body can meet the protection grade requirement of IP6K7/IP6K 9.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A novel automobile PKE low-frequency antenna is provided with a ferrite, an enameled coil, an antenna shell and an antenna connector; the ferrite, the enameled coil and the antenna shell are arranged from inside to outside; the antenna connector is welded with the end part of the ferrite extending out of the enameled wire; the method is characterized in that: the upper side and the lower side of the ferrite sleeved with the enameled coil are both provided with FR4 epoxy boards in a clinging manner, and the ferrite and the epoxy boards are sleeved with a heat-shrinkable sleeve for wrapping after being clinged tightly; and high-elasticity pur polyurethane glue is filled in gaps among the ferrite, the epoxy plate and the shell.
2. The novel automotive PKE low frequency antenna of claim 1, wherein: the FR4 epoxy board has a width corresponding to that of ferrite and a length shorter than that of ferrite.
3. The novel automotive PKE low frequency antenna of claim 1, wherein: the thickness of the FR4 epoxy plate is 1-2 mm.
4. The novel automotive PKE low frequency antenna of claim 1, 2 or 3, wherein: the two ends of the enameled wire are dense and the middle of the enameled wire is sparse, and the enameled coil is wound on the ferrite in a crossed mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922097463.5U CN210607609U (en) | 2019-11-28 | 2019-11-28 | Novel automobile PKE low-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922097463.5U CN210607609U (en) | 2019-11-28 | 2019-11-28 | Novel automobile PKE low-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210607609U true CN210607609U (en) | 2020-05-22 |
Family
ID=70722718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922097463.5U Active CN210607609U (en) | 2019-11-28 | 2019-11-28 | Novel automobile PKE low-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210607609U (en) |
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2019
- 2019-11-28 CN CN201922097463.5U patent/CN210607609U/en active Active
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.16, Changjiang North Road, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Changzhou ketewa Electronics Co.,Ltd. Address before: No.16, Changjiang North Road, Xinbei District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU CTW ELECTRONICS Co.,Ltd. |