Slotted planar antenna

Abstract

The utility model discloses a slotted planar antenna, which belongs to the technical field of antenna communication and comprises an anti-impact sheet, an oscillator sheet, a circuit layer and a protective layer which are sequentially arranged from top to bottom. The oscillator sheet is provided with a radiation slot to form a radiation field; the anti-impact sheet is provided with a first slot, and the first slot faces the radiation slot. The circuit layer is provided with a second slot, the protection layer is provided with a third slot, the second slot is communicated with the third slot, and the second slot faces the radiation slot; the first gap open groove, the second gap open groove and the second gap open groove are all provided with plastic gap filling pieces. The slotted panel antenna solves the problem of insufficient pressure resistance of the existing antenna for automobile detection mounted on the road surface.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna communication, and particularly relates to a slotted flat antenna. Background Art

[0002] In recent years, with the rapid development of the integration of Internet of Things systems, vehicle monitoring has become a trend. The RFID antenna for vehicle monitoring is generally installed on the road surface. When a vehicle passes by the roadside, it will pass through the RFID antenna, thereby completing the monitoring of the vehicle. However, the current popular road surface RFID antenna has insufficient compressive resistance and thus cannot withstand the impact force of vehicles on the road surface on the antenna. Summary of the Utility Model

[0003] In order to overcome the defects existing in the prior art, the utility model provides a slotted flat antenna to solve the above problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a slotted flat antenna, which includes an impact-resistant sheet, a vibrator sheet, a circuit layer and a protective layer arranged in sequence from top to bottom;

[0005] The vibrator sheet is provided with radiation slots to form a radiation field;

[0006] The impact-resistant sheet is provided with a first slot, and the first slot faces the radiation slot;

[0007] The circuit layer is provided with a second slot, and the protective layer is provided with a third slot. The second slot is communicated with the third slot, and the second slot faces the radiation slot;

[0008] The first slot, the second slot and the third slot are all provided with plastic slot fillers.

[0009] Preferably, the vibrator sheet further includes a coaxial cable bus, a one-to-two impedance, a first coaxial cable branch and a second coaxial cable branch. One end of the coaxial cable bus is electrically connected to an electronic component in the circuit layer, and the other end of the coaxial cable bus is respectively electrically connected to one end of the first coaxial cable branch and one end of the second coaxial cable branch through the one-to-two impedance. Radiation slots are electrically connected to the second ends of the first coaxial cable branch and the second coaxial cable branch.

[0010] Optionally, the circuit layer is provided with an impedance slot, and the impedance slot faces the one-to-two impedance so that the one-to-two impedance is arranged in the impedance slot.

[0011] It should be noted that the circuit layer is provided with a circuit slot, and the circuit slot faces the coaxial cable bus, the first coaxial cable branch, and the second coaxial cable branch, so that the coaxial cable bus, the first coaxial cable branch, and the second coaxial cable branch are all arranged in the circuit slot.

[0012] Specifically, the impact-resistant sheet, the circuit layer, and the protective layer are all made of stainless steel plates.

[0013] Preferably, the plastic seam filler is a buffer pressure-bearing glue.

[0014] The beneficial effect of the present invention is that in the described slotted flat antenna, by arranging an impact-resistant sheet on the upper side of the oscillator sheet, arranging a protective layer on the lower side of the oscillator sheet, and then cooperating with the plastic seam filler arranged opposite to the radiation gap, the pressure-bearing capacity is improved, so as to achieve the purpose of withstanding the impact force of road vehicles on the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of the slotted flat antenna in an embodiment of the present invention;

[0016] Figure 2 is a top view of the impact-resistant sheet in an embodiment of the present invention;

[0017] Figure 3 is a top view of the oscillator sheet in an embodiment of the present invention;

[0018] Figure 4 is a top view of the circuit layer in an embodiment of the present invention;

[0019] Figure 5 is a top view of the protective layer in an embodiment of the present invention;

[0020] Figure 6 is a top view of the plastic seam filler in an embodiment of the present invention;

[0021] In the figure: 1 impact-resistant sheet; 11 first slot; 2 oscillator sheet; 21 radiation gap; 22 coaxial cable bus; 23 one-to-two impedance; 24 first coaxial cable branch; 25 second coaxial cable branch; 3 circuit layer; 31 second slot; 32 impedance slot; 33 circuit slot; 4 protective layer; 41 third slot; 5 plastic seam filler. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the specific embodiments of the present utility model in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] As Figure 1-6 shown, a slotted flat antenna includes an impact-resistant sheet 1, a dipole sheet 2, a circuit layer 3, and a protective layer 4 arranged in sequence from top to bottom;

[0024] The dipole sheet 2 is provided with radiation slots 21 to form a radiation field; in this embodiment, the radiation slots 21 play a role of impedance gradually changing and opening. The signal forms a radiation field at the position of the slot protrusion of the radiation slots 21. By providing two radiation slots 21 on the dipole sheet 2, an array antenna composed of two arrays is formed;

[0025] The impact-resistant sheet 1 is provided with a first slot 11, and the first slot 11 faces the radiation slots 21;

[0026] The circuit layer 3 is provided with a second slot 31, and the protective layer 4 is provided with a third slot 41. The second slot 31 is communicated with the third slot 41, and the second slot 31 faces the radiation slots 21;

[0027] The first slot 11, the second slot 31, and the third slot 31 are all provided with plastic slot fillers 5.

[0028] In the slotted flat antenna, by providing the impact-resistant sheet 1 on the upper side of the dipole sheet 2, providing the protective layer 4 on the lower side of the dipole sheet 2, and then cooperating with the plastic slot fillers 5 arranged to align with the radiation slots 21, the pressure-bearing capacity is improved to achieve the purpose of withstanding the impact force of the road vehicles on the antenna. Among them, the plastic slot fillers 5 play a role in protecting the radiation slots 21.

[0029] It should be noted that the oscillator sheet 2 further includes a coaxial cable bus 22, a one-to-two impedance 23, a first coaxial cable branch 24, and a second coaxial cable branch 25. One end of the coaxial cable bus 22 is electrically connected to an electronic component in the circuit layer 3, and the other end of the coaxial cable bus 22 is electrically connected to one end of the first coaxial cable branch 24 and one end of the second coaxial cable branch 25 through the one-to-two impedance 23. Radiation slots 21 are electrically connected to the second ends of the first coaxial cable branch 24 and the second coaxial cable branch 25. A monitoring circuit is formed by a plurality of electronic components in the circuit layer 3. The monitoring circuit is an existing technology and will not be elaborated here. The signal is transmitted from the coaxial cable bus 22 to the one-to-two impedance 23 for matching, and then transmitted to the corresponding radiation slots 21 through the first coaxial cable branch 24 and the second coaxial cable branch 25 respectively.

[0030] Optionally, the circuit layer 3 is provided with an impedance slot 32, and the impedance slot 32 faces the one-to-two impedance 23 so that the one-to-two impedance 23 is disposed in the impedance slot 32. By providing the impedance slot 32, the one-to-two impedance 23 can be wrapped by the circuit layer 3, thereby protecting the one-to-two impedance 23.

[0031] Preferably, the circuit layer 3 is provided with a line slot 33, and the line slot 33 faces the coaxial cable bus 22, the first coaxial cable branch 24, and the second coaxial cable branch 25 so that the coaxial cable bus 22, the first coaxial cable branch 24, and the second coaxial cable branch 25 are all disposed in the line slot 33. In this embodiment, the line slot 33 is communicated with the impedance slot 32, so that it is convenient for the coaxial cable bus 22, the first coaxial cable branch 24, and the second coaxial cable branch 25 to be disposed in the line slot 33 after being led out from the one-to-two impedance 23. By providing the line slot 33, the coaxial cable bus 22, the first coaxial cable branch 24, and the second coaxial cable branch 25 can be wrapped by the line slot 33, thereby protecting the coaxial cable bus 22, the first coaxial cable branch 24, and the second coaxial cable branch 25.

[0032] Specifically, the shock-resistant sheet 1, the circuit layer 3, and the protective layer 4 are all made of stainless steel plates. The shock-resistant sheet 1, the circuit layer 3, and the protective layer 4 made of stainless steel plates can improve the pressure-bearing capacity.

[0033] Preferably, the plastic seam filler 5 is a buffer pressure-bearing glue.

[0034] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A slotted flat antenna, characterized in that: It includes an impact-resistant sheet, an oscillator sheet, a circuit layer, and a protective layer that are sequentially arranged from top to bottom; The oscillator sheet is provided with radiation slits to form a radiation field; The impact-resistant sheet is provided with a first slit groove that faces the radiation slits; The circuit layer is provided with a second slit groove, and the protective layer is provided with a third slit groove. The second slit groove communicates with the third slit groove, and the second slit groove faces the radiation slits; The first slit groove, the second slit groove, and the second slit groove are all provided with plastic slit fillers.

2. The slotted planar antenna according to claim 1, wherein: The oscillator sheet further includes a coaxial cable bus, a one-to-two impedance, a first coaxial cable branch, and a second coaxial cable branch. One end of the coaxial cable bus is electrically connected to an electronic component in the circuit layer, and the other end of the coaxial cable bus is respectively electrically connected to one end of the first coaxial cable branch and one end of the second coaxial cable branch through the one-to-two impedance. Radiation slits are electrically connected to the second ends of the first coaxial cable branch and the second coaxial cable branch.

3. The slotted planar antenna according to claim 2, wherein: The circuit layer is provided with an impedance groove that faces the one-to-two impedance so that the one-to-two impedance is arranged in the impedance groove; 4. The slotted planar antenna according to claim 2, wherein: The circuit layer is provided with a circuit groove that faces the coaxial cable bus, the first coaxial cable branch, and the second coaxial cable branch so that the coaxial cable bus, the first coaxial cable branch, and the second coaxial cable branch are all arranged in the circuit groove; 5. The slotted planar antenna according to claim 1, wherein: The impact-resistant sheet, the circuit layer, and the protective layer are all stainless steel plates; 6. The slotted planar antenna according to claim 1, wherein: The plastic slit filler is a buffer pressure-bearing adhesive.

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