LORA antenna of smoke alarm

Abstract

The LORA antenna comprises a substrate and an antenna unit arranged on one side of the substrate, the antenna unit comprises a radiation unit and a grounding unit, the radiation unit comprises a first arc-shaped branch and a second arc-shaped branch which are connected, the second arc-shaped branch is located on the outer side of the first arc-shaped branch, and the grounding unit is located on the outer side of the first arc-shaped branch. A first arc-shaped gap is formed between the first arc-shaped stub and the second arc-shaped stub; the LORA antenna of the smoke alarm provided by the utility model has the characteristic of good performance, the second arc-shaped stub is arranged on the outer side of the first arc-shaped stub, and the first arc-shaped gap is formed between the first arc-shaped stub and the second arc-shaped stub. And the first arc-shaped gap enables a capacitive load to be formed between the second arc-shaped branch and the first arc-shaped branch, so that the radiation performance is enhanced, and the improvement of the antenna performance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a LORA antenna for a smoke alarm. Background Art

[0002] With the rise of the Internet of Things, LORA technology has a lot of room for development. From a global perspective, LORA technology has already been implemented in commercial projects all over the world. Currently, LORA technology mainly operates in the global free frequency band. Its biggest features are long transmission distance, low power consumption, and multiple networking nodes.

[0003] The smoke alarm has the characteristics of large demand, low data connection, and low power consumption requirement so that it can work for a long time. It is also a product that can apply LORA technology. This requires the smoke alarm to have a good performance LORA antenna. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a LORA antenna for a smoke alarm with good performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a LORA antenna for a smoke alarm, comprising a substrate and an antenna unit arranged on one side of the substrate, the antenna unit comprising a radiation unit and a grounding unit, the radiation unit comprising a first arc-shaped branch section and a second arc-shaped branch section connected to each other, the second arc-shaped branch section being located on the outside of the first arc-shaped branch section, and a first arc-shaped gap being provided between the first arc-shaped branch section and the second arc-shaped branch section.

[0006] Furthermore, the widths of the first arc-shaped branch section, the second arc-shaped branch section, and the first arc-shaped gap are equal.

[0007] Furthermore, the radiation unit is further provided with a first welding portion extending in a direction close to the grounding unit, and the grounding unit is provided with a second welding portion at one end close to the first welding portion.

[0008] Furthermore, the antenna unit also includes a third arc-shaped branch node, which is located on the outside of the first arc-shaped branch node, and a second arc-shaped gap is formed between the third arc-shaped branch node and the first arc-shaped branch node, and the width of the second arc-shaped gap is equal to the width of the first arc-shaped gap.

[0009] Furthermore, the substrate is also provided with a through hole connecting two sides thereof.

[0010] Furthermore, the through hole is in a square shape.

[0011] Furthermore, an adhesive layer is provided on a side of the substrate facing away from the antenna unit.

[0012] Furthermore, the material of the adhesive layer is 3M glue.

[0013] The beneficial effect of the utility model is that the LORA antenna of the smoke alarm provided by the utility model has the characteristics of good performance. A second arc-shaped branch section is arranged on the outer side of the first arc-shaped branch section, and a first arc-shaped gap is formed between the first arc-shaped branch section and the second arc-shaped branch section. The first arc-shaped gap forms a capacitive load between the second arc-shaped branch section and the first arc-shaped branch section, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of one side of the LORA antenna of the smoke alarm of the first embodiment of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the other side of the LORA antenna of the smoke alarm of the first embodiment of the utility model;

[0016] Figure 3 This is a return loss diagram of the LORA antenna of the smoke alarm of the first embodiment of the utility model;

[0017] Figure 4 The directional diagram of the LORA antenna of the smoke alarm of the first embodiment of the utility model when the operating frequency is 470 MHz;

[0018] Figure 5 The directional diagram of the LORA antenna of the smoke alarm of the first embodiment of the utility model when the operating frequency is 490 MHz;

[0019] Figure 6 This is the directional diagram of the LORA antenna of the smoke alarm of the first embodiment of the utility model when the operating frequency is 510 MHz.

[0020] Description of labels:

[0021] 1. Substrate; 11. Through hole; 2. Radiating unit; 21. First arc-shaped branch; 22. Second arc-shaped branch; 23. Third arc-shaped branch; 24. First arc-shaped gap; 25. Second arc-shaped gap; 26. First welding part; 3. Grounding unit; 31. Second welding part; 4. Adhesive layer. DETAILED DESCRIPTION

[0022] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0023] Please refer to Figures 1 to 6A LORA antenna for a smoke alarm comprises a substrate 1 and an antenna unit arranged on one side of the substrate 1, wherein the antenna unit comprises a radiation unit 2 and a grounding unit 3, wherein the radiation unit 2 comprises a first arc-shaped branch section 21 and a second arc-shaped branch section 22 connected to each other, wherein the second arc-shaped branch section 22 is located outside the first arc-shaped branch section 21, and a first arc-shaped gap 24 is provided between the first arc-shaped branch section 21 and the second arc-shaped branch section 22.

[0024] From the above description, it can be seen that the beneficial effect of the utility model is that: the second arc-shaped branch section 22 is arranged on the outer side of the first arc-shaped branch section 21, and an arc-shaped gap is formed between the first arc-shaped branch section 21 and the second arc-shaped branch section 22, and the first arc-shaped gap 24 forms a capacitive load between the second arc-shaped branch section 22 and the first arc-shaped branch section 21, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance.

[0025] Furthermore, the widths of the first arc-shaped branch section 21 , the second arc-shaped branch section 22 and the first arc-shaped gap 24 are equal.

[0026] It can be seen from the above description that the widths of the first arc-shaped branch section 21 , the second arc-shaped branch section 22 and the first arc-shaped gap 24 can be set according to actual application requirements.

[0027] Furthermore, the radiation unit 2 is further provided with a first welding portion 26 extending toward the direction close to the grounding unit 3 , and the grounding unit 3 is provided with a second welding portion 31 at one end close to the first welding portion 26 .

[0028] It can be seen from the above description that the first welding portion 26 and the second welding portion 31 are provided to facilitate connection with the signal transmission line of the smoke alarm.

[0029] Furthermore, the radiation unit 2 also includes a third arc-shaped branch section 23, which is located on the outside of the first arc-shaped branch section 21, and a second arc-shaped gap 25 is formed between the third arc-shaped branch section 23 and the first arc-shaped branch section 21, and the width of the second arc-shaped gap 25 is equal to the width of the first arc-shaped gap 24.

[0030] It can be seen from the above description that the second arc-shaped gap 25 forms a capacitive load between the third arc-shaped branch section 23 and the first arc-shaped branch section 21, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance.

[0031] Furthermore, the substrate 1 is also provided with a through hole 11 connecting two sides thereof.

[0032] It can be seen from the above description that the through hole 11 is convenient for avoiding the wiring of the smoke alarm.

[0033] Furthermore, the through hole 11 is in a square shape.

[0034] It can be seen from the above description that the shape of the through hole 11 can be set according to actual application requirements.

[0035] Furthermore, an adhesive layer 4 is provided on a side of the substrate 1 facing away from the antenna unit.

[0036] Furthermore, the material of the adhesive layer 4 is 3M glue.

[0037] It can be seen from the above description that providing the adhesive layer 4 on the substrate 1 facilitates fixing the antenna on the smoke alarm, and facilitates installation and disassembly.

[0038] Please refer to Figures 1 to 6 The first embodiment of the utility model is: a LORA antenna for a smoke alarm, comprising a substrate 1 and an antenna unit arranged on one side of the substrate 1, the antenna unit comprising a radiation unit 2 and a grounding unit 3, the radiation unit 2 comprising a first arc-shaped branch section 21 and a second arc-shaped branch section 22 connected to each other, the second arc-shaped branch section 22 being located outside the first arc-shaped branch section 21, and a first arc-shaped gap 24 being provided between the first arc-shaped branch section 21 and the second arc-shaped branch section 22; it is easy to understand that the second arc-shaped branch section 21 is arranged outside the first arc-shaped branch section 21. The first arc-shaped branch section 21 and the second arc-shaped branch section 22 are connected to each other, and an arc-shaped gap is formed between the first arc-shaped branch section 21 and the second arc-shaped branch section 22. The first arc-shaped gap 24 forms a capacitive load between the second arc-shaped branch section 22 and the first arc-shaped branch section 21, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance. Specifically in this embodiment, the widths of the first arc-shaped branch section 21, the second arc-shaped branch section 22 and the first arc-shaped gap 24 are equal, and the widths of the first arc-shaped branch section 21, the second arc-shaped branch section 22 and the first arc-shaped gap 24 can be set according to actual application requirements.

[0039] Preferably, the radiation unit 2 is further provided with a first welding portion 26 extending toward the grounding unit 3, and the grounding unit 3 is provided with a second welding portion 31 at one end close to the first welding portion 26, so as to facilitate connection with the signal transmission line of the smoke alarm.

[0040] In this embodiment, the radiation unit 2 further includes a third arc-shaped branch section 23, the third arc-shaped branch section 23 is located outside the first arc-shaped branch section 21, a second arc-shaped gap 25 is formed between the third arc-shaped branch section 23 and the first arc-shaped branch section 21, the width of the second arc-shaped gap 25 is equal to the width of the first arc-shaped gap 24, and the second arc-shaped gap 25 forms a capacitive load between the third arc-shaped branch section 23 and the first arc-shaped branch section 21, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance; further, a bonding layer 4 is provided on the side of the substrate 1 away from the antenna unit. The bonding layer 4 is made of 3M glue, and the bonding layer 4 is provided on the substrate 1 to facilitate fixing the antenna on the smoke alarm, and is convenient for installation and disassembly.

[0041] Preferably, the substrate 1 is further provided with a through hole 11 connecting two sides thereof, and the through hole 11 is convenient for avoiding the wiring of the smoke alarm. The shape of the through hole 11 is square, and the shape of the through hole 11 can be set according to actual application requirements.

[0042] Please combine Figures 3 to 6 , Figure 3 This is the return loss graph of the LORA antenna for the smoke alarm; Figure 4 This is the directional diagram of the LORA antenna of the smoke alarm when the operating frequency is 470MHz; Figure 5 This is the directional diagram of the LORA antenna of the smoke alarm when the operating frequency is 490MHz; Figure 6 : is the directional diagram of the LORA antenna of the smoke alarm when the operating frequency is 510 MHz; it is not difficult to see that the LORA antenna of the smoke alarm in this embodiment has good antenna performance and omnidirectionality at 470 MHz-510 MHz.

[0043] To sum up, the LORA antenna of the smoke alarm provided by the utility model has the characteristics of good performance. A second arc-shaped branch section is arranged on the outer side of the first arc-shaped branch section, and a first arc-shaped gap is formed between the first arc-shaped branch section and the second arc-shaped branch section. The first arc-shaped gap forms a capacitive load between the second arc-shaped branch section and the first arc-shaped branch section, thereby enhancing the radiation performance and facilitating the improvement of the antenna performance.

[0044] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A LORA antenna for a smoke alarm, comprising a substrate and an antenna unit arranged on one side of the substrate, wherein the antenna unit comprises a radiation unit and a grounding unit, wherein: The radiation unit includes a first arc-shaped branch section and a second arc-shaped branch section that are connected. The second arc-shaped branch section is located outside the first arc-shaped branch section. A first arc-shaped gap is provided between the first arc-shaped branch section and the second arc-shaped branch section.

2. The LORA antenna for smoke alarm according to claim 1, characterized in that: The widths of the first arc-shaped branch section, the second arc-shaped branch section and the first arc-shaped gap are equal.

3. The LORA antenna for smoke alarm according to claim 1, characterized in that: The radiation unit is further provided with a first welding portion extending in a direction close to the grounding unit, and the grounding unit is provided with a second welding portion at one end close to the first welding portion.

4. The LORA antenna for smoke alarm according to claim 1, characterized in that: The radiation unit also includes a third arc-shaped branch section, which is located outside the first arc-shaped branch section. A second arc-shaped gap is formed between the third arc-shaped branch section and the first arc-shaped branch section, and the width of the second arc-shaped gap is equal to the width of the first arc-shaped gap.

5. The LORA antenna for smoke alarm according to claim 1, characterized in that: The substrate is also provided with a through hole connecting two sides thereof.

6. The LORA antenna for smoke alarm according to claim 5, characterized in that: The through hole is in a square shape.

7. The LORA antenna for smoke alarm according to claim 1, characterized in that: A bonding layer is provided on a side of the substrate facing away from the antenna unit.

8. The LORA antenna for smoke alarm according to claim 7, characterized in that: The material of the adhesive layer is 3M glue.

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