Omnidirectional glass fiber reinforced plastic antenna and fire-fighting detection device

Abstract

The utility model provides an omnidirectional glass fiber reinforced plastic antenna and a fire-fighting detection device. The omnidirectional glass fiber reinforced plastic antenna comprises: a carrier; the onboard antenna is integrated on the carrier, and the onboard antenna comprises an antenna feed circuit branch knot; the antenna ground circuit branch knot is parallel to the antenna feed circuit branch knot; the antenna short-circuit branch knot is connected with the antenna feed circuit branch knot and the antenna ground circuit branch knot; and the plurality of bonding pads are integrated on the onboard antenna and are suitable for being connected with a radio frequency cable. The omni-directional glass fiber reinforced plastic antenna, the carrier, the onboard antenna and the bonding pad are integrally designed, the antenna ground branch is parallel to the antenna feed branch, the structure is compact, the integration level is high, the size is small, production and control can be simplified, the cost is reduced, the antenna gain and the uniformity of the radiation direction are improved, the omni-directional radiation characteristic of high efficiency and good uniformity is realized, and the antenna has a wide application prospect. The device is suitable for outdoor environment application.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technology field especially, relate to a kind of omnidirectional glass steel antenna and fire-fighting detection device. BACKGROUND

[0002] In the field of wireless communication, as the key component of signal transmission and reception, the performance of antenna directly affects the coverage and signal quality of communication system. At present, the antenna materials widely used in the market are various, among which, glass steel occupies a place in antenna manufacturing due to its light weight, high strength, corrosion resistance and easy processing. However, the traditional outdoor antenna is mostly designed to be directional, that is, it can only realize efficient signal transmission and reception in one or a few specific directions, which limits its application in scenarios requiring omnidirectional coverage, such as base stations and wireless local area networks. In addition, the existing outdoor antenna often has problems such as complex design, high manufacturing cost and poor signal uniformity when realizing omnidirectional radiation. Specifically, in order to realize omnidirectionality, multiple units combination or special structure design is required, which not only increases the design difficulty, processing cost and size of the antenna, but also may cause inconsistent gain of signals in different directions, affecting the communication quality. Therefore, there is a need for an outdoor antenna with small size, low cost and good signal uniformity.

[0003] The content of the background section merely represents the best of the inventor's knowledge and does not necessarily represent the existing technology in the field. SUMMARY

[0004] In view of one or more of the problems existing in the prior art, the utility model provides an omnidirectional glass steel antenna, comprising: a carrier; a board-mounted antenna integrated in the carrier, the board-mounted antenna comprising: an antenna feed branch; an antenna ground branch parallel to the antenna feed branch; and an antenna short-circuit branch connecting the antenna feed branch and the antenna ground branch; a plurality of pads integrated in the board-mounted antenna and adapted to connect a radio frequency cable; and a glass steel shell containing the carrier, the board-mounted antenna and the plurality of pads.

[0005] Optionally, the antenna short-circuit branch comprises a first sub-branch, a second sub-branch and a third sub-branch, wherein the first sub-branch is connected to the antenna feed branch; the third sub-branch is connected to the antenna ground branch; and the second sub-branch is connected to the first sub-branch and the third sub-branch, and the antenna short-circuit branch is approximately "U"-shaped.

[0006] Optionally, the plurality of pads comprises a first pad and a second pad arranged in an upper-lower isolation manner, wherein the first pad is integrated in the antenna feed branch and adapted to connect a feed end of the radio frequency cable; and the second pad is integrated in the antenna ground branch and adapted to connect a return end of the radio frequency cable.

[0007] Optionally, the first pad and the second pad are located at the via positions of the carrier.

[0008] Optionally, the antenna further includes: a sealing structure disposed on the top of the fiberglass housing; a cylindrical metal fixing structure disposed on the bottom of the fiberglass housing; and a radio frequency connection terminal disposed below the cylindrical metal fixing structure, the radio frequency connection terminal being adapted to connect the radio frequency cable.

[0009] Optionally, the carrier has a length of 353.5±1mm and a width of 16±1mm; the antenna feed stub has a length of 328±1mm and a width of 3±0.5mm; the antenna ground stub has a length of 113±1mm and a width of 3±0.5mm; and the antenna feed stub and the antenna ground stub are 8±1mm apart.

[0010] Optionally, the length of the first sub-branch is 20mm ± 0.5mm; the length of the second sub-branch is 15mm ± 0.5mm; the length of the third sub-branch is 15mm ± 0.5mm; the width of the first sub-branch, the second sub-branch, and the third sub-branch is 3mm ± 0.5mm; and the second sub-branch is 0.5mm away from the edge of the carrier.

[0011] Optionally, the length of the first pad and the second pad is 4±0.5mm and the width is 3mm±0.5mm.

[0012] Optionally, the antenna feed stub, the antenna ground stub, the antenna short-circuit stub, and the plurality of pads are integrated into one unit.

[0013] Optionally, the omnidirectional fiberglass antenna supports frequency bands ranging from 470MHz to 510MHz.

[0014] This utility model also provides a fire detection device, including: one or more omnidirectional fiberglass antennas as described above.

[0015] Optionally, the fire detection device further includes: a transmitting device connected to the omnidirectional fiberglass antenna; a receiving device connected to the omnidirectional fiberglass antenna; and a processing device connected to the transmitting device and the receiving device.

[0016] This utility model presents an omnidirectional fiberglass antenna that is small in size, low in cost, and exhibits good signal uniformity, making it suitable for outdoor applications. The carrier, onboard antenna, and solder pads are integrated into a single design, with the antenna ground stub parallel to the antenna feed stub. This compact structure, high integration, and small size simplify production and control, reduce costs, improve antenna gain and radiation direction uniformity, and achieve highly efficient and uniform omnidirectional radiation characteristics. Attached Figure Description

[0017] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application, and together with the description serve to explain the present application, and do not limit the present application. In the drawings:

[0018] Figure 1 An external schematic view of an omnidirectional glass steel antenna according to some embodiments of the present application is shown.

[0019] Figure 2 An internal schematic view of an omnidirectional glass steel antenna according to some embodiments of the present application is shown.

[0020] Figure 3 An internal partial exploded schematic view of an omnidirectional glass steel antenna according to some embodiments of the present application is shown.

[0021] Figure 4 An internal dimension schematic view of an omnidirectional glass steel antenna according to some embodiments of the present application is shown.

[0022] Figure 5 A schematic view of a fire detection device according to some embodiments of the present application is shown.

[0023] Figure 6 A schematic view of a fire detection device according to some embodiments of the present application is shown.

[0024] Figure 7 A schematic view of a fire detection device according to some embodiments of the present application is shown.

[0025] Reference signs:

[0026] 10, 10-1, 10-2: omnidirectional glass steel antenna

[0027] 11: carrier

[0028] 12: on-board antenna

[0029] 121: antenna feed stub

[0030] 122: antenna short stub

[0031] 122-1: first sub-stub

[0032] 122-2: second sub-stub

[0033] 122-3: third sub-stub

[0034] 123: antenna ground stub

[0035] 13: pad

[0036] 13-1: first pad

[0037] 13-2: second pad

[0038] 14: glass-steel outer shell

[0039] 15: sealing structure

[0040] 16: metal fixing structure

[0041] 17: radio frequency connection terminal

[0042] 20: fire detection device

[0043] TX: transmitting device

[0044] RX: receiving device

[0045] 202: processing device

[0046] K: radio frequency switch DETAILED DESCRIPTION

[0047] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0048] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "coupling" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] The following provides many different embodiments or examples for implementing various structures of this invention. To simplify the invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0052] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0053] The utility model provides a kind of omnidirectional glass steel antenna.The omnidirectional glass steel antenna includes carrier, on-board antenna, multiple pads and glass steel shell.On-board antenna is integrated in carrier.On-board antenna includes antenna feed branch, antenna ground branch and antenna short-circuit branch.Antenna ground branch is parallel to antenna feed branch.Antenna short-circuit branch connects antenna feed branch and antenna ground branch.Multiple pads are integrated in on-board antenna, suitable for connecting radio frequency cable.Glass steel shell can accommodate carrier, on-board antenna and multiple pads.The omnidirectional glass steel antenna of the utility model is small in size, low in cost, good in signal uniformity, and suitable for outdoor environment application.Carrier, on-board antenna and pad are designed integrally, antenna ground branch is parallel to antenna feed branch, compact in structure, high in integration, small in size, which can simplify production, control and reduce cost, improve antenna gain and the uniformity of radiation direction, realize high efficiency, omnidirectional radiation characteristics with good uniformity.

[0054] Figure 1 An external schematic view of the omnidirectional glass steel antenna 10 according to some embodiments of the utility model is shown. Figure 2 An internal schematic view of the omnidirectional glass steel antenna 10 according to some embodiments of the utility model is shown. Figure 3 An internal partial exploded schematic view of the omnidirectional glass steel antenna 10 according to some embodiments of the utility model is shown. Figure 4 An internal dimension schematic view of the omnidirectional glass steel antenna 10 according to some embodiments of the utility model is shown. The following description is made with reference to Figures 1 to 4 Description.

[0055] The omnidirectional glass steel antenna 10 (hereinafter referred to as "antenna 10" for convenience) includes a carrier 11, an on-board antenna 12, multiple pads 13 and a glass steel shell 14. The carrier 11, the on-board antenna 12 and the multiple pads 13 are located within the glass steel shell 14. The glass steel shell 14 is light, environmentally friendly, high-strength, corrosion-resistant and has good insulation performance, which can improve the reliability and durability of the antenna 10.

[0056] The carrier 11 can be a printed circuit board (PCB). The length of the carrier 11 can be 353.5±1 mm, and the width can be 16±1 mm. The small size design of the carrier 11 helps to reduce the size of the glass steel shell and the entire antenna, and reduces the cost.

[0057] The on-board antenna 12 is integrated in the carrier 11. The on-board antenna 12 includes an antenna feed branch 121, an antenna short-circuit branch 122 and an antenna ground branch 123. The antenna ground branch 123 is parallel to the antenna feed branch 121. The antenna short-circuit branch 122 connects the antenna feed branch 121 and the antenna ground branch 123. The multiple pads 13 are integrated in the on-board antenna 12. The multiple pads 13 include a first pad 13-1 and a second pad 13-2 arranged in an upper and lower isolation manner.

[0058] The antenna feed branch 121 is the main radiating arm of the antenna 10, which is led out from the first pad 13-1, extends along the left edge of the carrier 11 upwards (in the direction away from the first pad 13-1), and is straight without bending. The antenna feed branch 121 can obtain more clearance and better antenna radiation environment while occupying a smaller size as much as possible, thereby ensuring the bandwidth and gain of the antenna. The size of the antenna feed branch 121 mainly determines the working frequency band of the antenna and the size of the entire antenna. The length of the antenna feed branch 121 can be 328±1 mm, and the width can be 3±0.5 mm. The antenna feed branch 121 is about 0.5 mm away from the left edge of the carrier 11. The small size design of the antenna feed branch 121 helps to reduce the size of the glass steel shell and the entire antenna, and reduces the cost.

[0059] The antenna ground branch 123 is the secondary radiating arm of the antenna 10, which is led out from the second pad 13-2, and extends along the right edge of the carrier 11 upwards (in the direction away from the second pad 13-2). The antenna ground branch 123 is parallel to the antenna feed branch 121 and coupled with each other to produce a capacitive effect, which can improve the gain of the antenna and the uniformity of the radiation direction, and present 360° uniform radiation in the horizontal direction without directionality and wide coverage. The antenna ground branch 123 is about 8±1 mm away from the antenna feed branch 121. The length of the antenna ground branch 123 can be 113±1 mm, and the width can be 3±0.5 mm. The antenna ground branch 123 is about 0.5 mm away from the right edge of the carrier 11. The small size design of the antenna ground branch 123 helps to reduce the size of the glass steel shell and the entire antenna, and reduces the cost.

[0060] The antenna feed branch 121 and the antenna ground branch 123 jointly determine the working frequency band of the antenna 10. The antenna 10 supports a frequency band of 470 MHz to 510 MHz. The wide frequency band is compatible, which can meet the needs of different communication systems and enhance the versatility and flexibility of the antenna.

[0061] The antenna short-circuit branch 122 is approximately a "U"-shaped line, which can be led from the antenna feed branch 121 and run away from the antenna feed branch 121 to the lower edge of the carrier 11, and then be bent upwards to be connected with the antenna ground branch 123. The antenna short-circuit branch 122 is approximately "U"-shaped. The antenna short-circuit branch 122 includes a first sub-branch 122-1, a second sub-branch 122-2 and a third sub-branch 122-3. The first sub-branch 122-1 is connected with the antenna feed branch 121. The third sub-branch 122-3 is connected with the antenna ground branch 123. The second sub-branch 122-2 is connected with the first sub-branch 122-1 and the third sub-branch 122-3. The length of the first sub-branch 122-1 can be 20 mm ± 0.5 mm. The length of the second sub-branch 122-2 can be 15 mm ± 0.5 mm. The length of the third sub-branch 122-3 can be 15 ± 0.5 mm. The width of the first sub-branch 122-1, the second sub-branch 122-2 and the third sub-branch 122-3 can be 3 mm ± 0.5 mm. The first sub-branch 122-1 is about 0.5 mm away from the left edge of the carrier 11. The second sub-branch 122-2 is about 0.5 mm away from the lower edge of the carrier 11. The third sub-branch 122-3 is about 0.5 mm away from the right edge of the carrier 11. The bending structure of the antenna short-circuit branch 122 in the approximate "U" shape also helps to reduce the size of the glass steel shell and the entire antenna, achieve small size design, and reduce the cost. The antenna short-circuit branch 122 connects the feed and the ground of the antenna through the bending structure in the approximate "U" shape, and can also adjust the antenna impedance, optimize the resonance and bandwidth.

[0062] The plurality of pads 13 is integrated in the on-board antenna 12. The plurality of pads 13 can include a first pad 13-1 and a second pad 13-2 which are arranged in an up-down isolation manner. The first pad 13-1 and the second pad 13-2 are integrated in the on-board antenna 12. Specifically, the first pad 13-1 is integrated in the antenna feed branch 121. The second pad 13-2 is integrated in the antenna ground branch 123. The plurality of pads 13 is suitable for connecting a radio frequency cable. Specifically, the first pad 13-1 is suitable for connecting a feed end of the radio frequency cable. The second pad 13-2 is suitable for connecting a return end of the radio frequency cable. The radio frequency cable can feed the antenna. The radio frequency cable can be a coaxial radio frequency cable, but is not limited thereto.

[0063] The conventional antenna beamforming is generally to control the amplitude and phase of each radiation unit by multiple feed points, to form an antenna array, and to perform beamforming according to the directivity pattern product principle. The antenna of the utility model can only include a single feed point, which only needs to weld the inner core of the radio frequency cable at the first pad 13-1 and weld the shielding layer of the radio frequency cable at the second pad 13-2, and excite the antenna through the single feed point, which is more convenient for welding and assembly in actual use.

[0064] In some embodiments, the length of the first pad 13-1 and the second pad 13-2 can be 4±0.5mm, and the width can be 3mm±0.5mm, facilitating welding. However, the application is not limited thereto. Preferably, the surface of the first pad 13-1 and the second pad 13-2 can be treated by an organic solderability preservative (OSP) process, which can improve the solderability and oxidation resistance, is low in cost, and is more environmentally friendly.

[0065] In some embodiments, the first pad 13-1 and the second pad 13-2 can be located at the via position of the carrier 11, which can strengthen the connection firmness of the pads with the onboard antenna, improve the tensile strength of the pads, and reduce the risk of pad falling off, so as to avoid damaging the pads when welding the radio frequency cable, help improve the stability and reliability of the antenna transmission signal, and improve the reliability and durability of the antenna 10. The via can be a blind via, a through via, or the like.

[0066] In some embodiments, the antenna feed branch 121, the antenna short-circuit branch 122, the antenna ground branch 123, and the plurality of pads 13 (the first pad 13-1 and the second pad 13-2) are integrated. The antenna is integrally formed, which can simplify the manufacturing process, reduce production costs, and help achieve high integration and small size design.

[0067] In some embodiments, the antenna 10 further comprises a sealing structure 15 arranged at the top of the glass steel shell 14. The sealing structure 15 can function as a fixed sealing. The antenna 10 further comprises a cylindrical metal fixing structure 16 arranged at the bottom of the glass steel shell 14. The cylindrical metal fixing structure 16 can function as a fixed support. The antenna 10 further comprises a radio frequency connection terminal 17 arranged below the cylindrical metal fixing structure 16. The radio frequency connection terminal 17 can comprise a plurality of connectors. The radio frequency connection terminal 17 is adapted to connect a radio frequency cable. The connection gaps between the sealing structure 15, the cylindrical metal fixing structure 16, and the radio frequency connection terminal 17 and the glass steel shell 14 can be treated by a uniform glue coating process or the like to improve the airtightness of the antenna 10, prevent water, rain, snow, frost, and dust, and achieve an IP67 or higher protection level, which is suitable for outdoor installation and deployment, ensures the stable operation of the antenna in complex outdoor environments, and is easy to assemble, install, use, and maintain.

[0068] The utility model realizes excellent performance of omnidirectional glass steel antenna, small size, high integration, low cost, good signal uniformity, and is suitable for application in outdoor environment.

[0069] This utility model's omnidirectional fiberglass antenna is integrally molded, simplifying the manufacturing process and reducing production costs. At the same time, its omnidirectional radiation characteristics improve communication efficiency, reduce signal blind spots, and achieve low cost and high efficiency.

[0070] The omnidirectional fiberglass antenna of this invention has a simple design and fewer assembly parts, making the antenna structure more compact and easier to install and maintain.

[0071] The omnidirectional fiberglass antenna of this invention has good signal uniformity. Through optimized design, it achieves uniform radiation in all directions, thereby improving communication quality.

[0072] This utility model's omnidirectional fiberglass antenna is wide-band compatible, meeting the needs of different communication systems and enhancing the antenna's versatility and flexibility.

[0073] This utility model's omnidirectional fiberglass antenna achieves industrial-grade weather resistance. By using a fiberglass shell made of high-protection-level materials, it achieves a protection level of IP67 or higher, making it suitable for outdoor installation and ensuring stable and reliable operation of the antenna in complex environments.

[0074] The omnidirectional fiberglass antenna of this invention adopts a single feed point, which makes welding and assembly more convenient in actual use.

[0075] This utility model of an omnidirectional fiberglass antenna significantly reduces the overall structural size of the antenna by reducing its length and width, thereby lowering the antenna cost. It also features high performance and high durability, making it suitable for flexible installation and deployment in multiple scenarios. It is easy to achieve commercial deployment and realize full-scenario coverage.

[0076] This utility model also provides a fire detection device. Figure 5 A schematic diagram of a fire detection device 20 according to some embodiments of the present invention is shown. Figure 5 As shown, the fire detection device 20 includes one or more omnidirectional fiberglass antennas 10 as described above (an omnidirectional fiberglass antenna 10 is shown as an example in the figure, and for convenience, it will be referred to as "antenna 10"). It should be noted that the fire detection device of this utility model should be interpreted broadly, including but not limited to fire detectors, fire control systems, etc.

[0077] Figure 6 A schematic diagram of a fire detection device 20 according to some embodiments of the present invention is shown. Figure 6As shown, the fire detection device 20 includes a plurality of antennas 10 (two antennas 10 are exemplarily shown in the figure, which are antenna 10-1 and antenna 10-2 respectively) as described above. The fire detection device 20 further includes a transmitting device TX, a receiving device RX and a processing device 202. The transmitting device TX is connected with the antenna 10-1 and can transmit radio frequency signals. The antenna 10-1 serves as a transmitting antenna and can transmit radio frequency transmitting signals. The receiving device RX is connected with the antenna 10-2 and can receive radio frequency signals. The antenna 10-2 serves as a receiving antenna and can transmit radio frequency receiving signals. The processing device 202 is connected with the transmitting device TX and the receiving device RX and can process radio frequency signals.

[0078] Figure 7 A schematic diagram of the fire detection device 20 according to some embodiments of the present application is shown. As shown, Figure 7 The fire detection device 20 includes the antenna 10, the transmitting device TX, the receiving device RX, the processing device 202 and further includes a radio frequency switch K. The radio frequency switch K is located between the transmitting channel and the receiving channel. Specifically, the radio frequency switch K is located between the antenna 10 and the transmitting device TX and the receiving device RX and is connected with the antenna 10, the transmitting device TX and the receiving device RX. The radio frequency switch K is further connected with the processing device 202, and the processing device 202 can control the on-off of the radio frequency switch K, thereby controlling the on-off of the radio frequency signal path between the antenna 10 and the transmitting device TX and between the antenna 10 and the receiving device RX, to meet the requirements of half-duplex communication.

[0079] The processing device 202 can include processing circuitry, a Central Processing Unit (CPU), a Micro Control Unit (MCU), a Digital Signal Processor (DSP), other general purpose processors, an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), a Complex Programmable Logic Device (CPLD) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The processing circuitry includes but is not limited to phase modulation circuitry, filter circuitry, amplification circuitry, etc.

[0080] It should be noted that, Figure 6 and Figure 7Only for example show, not enough pair of the utility model for limit, in actual application, the quantity, connection relation and control mode of radio frequency switch, antenna, transmitting device, receiving device and processing device can be adjusted according to demand, these are within the protection scope of the utility model.

[0081] The fire-fighting detection device of the utility model, by using the above-mentioned antenna, the integration is high, the size is small, the gain and the uniformity of radiation direction can be improved, omnidirectional radiation is realized, and the stability and reliability of signal transmission are improved, and it is suitable for being applied to outdoor environment.

[0082] It should be noted that the utility model can only include Figures 1-7 Any one or more features of any one or more embodiments. In other words, not all the features shown must be implemented in the antenna and fire-fighting detection device of the utility model at the same time.

[0083] It should be noted that although several parts of the antenna / fire-fighting detection device are mentioned in the foregoing detailed description, such division is merely not mandatory. In fact, according to the embodiments of the utility model, the features and functions of two or more parts described above can be implemented in one part. Conversely, the features and functions of one part described above can be further divided into specific embodiments by multiple parts.

[0084] Finally, it should be pointed out that: the above only for the preferred embodiment of the utility model has, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. An omni-directional fiberglass antenna, characterized by, The omnidirectional glass steel antenna comprises a carrier, an on-board antenna integrated in the carrier, and a plurality of pads integrated in the on-board antenna and adapted to connect a radio frequency cable. The antenna short-circuit branch comprises a first sub-branch, a second sub-branch, and a third sub-branch, wherein the first sub-branch is connected to the antenna feed branch, the third sub-branch is connected to the antenna ground branch, and the second sub-branch is connected to the first sub-branch and the third sub-branch, and the antenna short-circuit branch is substantially in the shape of a "U". The plurality of pads comprises a first pad and a second pad arranged in an upper-lower manner, wherein the first pad is integrated in the antenna feed branch and adapted to connect a feed end of the radio frequency cable, and the second pad is integrated in the antenna ground branch and adapted to connect a return end of the radio frequency cable. The first pad and the second pad are located at a via position of the carrier. The omnidirectional glass steel antenna further comprises a sealing structure arranged at the top of the glass steel shell, a cylindrical metal fixing structure arranged at the bottom of the glass steel shell, and a radio frequency connection terminal arranged below the cylindrical metal fixing structure and adapted to connect the radio frequency cable. The length of the carrier is 353.5±1 mm, the width of the carrier is 16±1 mm, the length of the antenna feed branch is 328±1 mm, the width of the antenna feed branch is 3±0.5 mm, the length of the antenna ground branch is 113±1 mm, the width of the antenna ground branch is 3±0.5 mm, and the distance between the antenna feed branch and the antenna ground branch is 8±1 mm. The length of the first sub-branch is 20 mm±0.5 mm, the length of the second sub-branch is 15 mm±0.5 mm, the length of the third sub-branch is 15±0.5 mm, the width of the first sub-branch, the second sub-branch, and the third sub-branch is 3 mm±0.5 mm, and the distance between the second sub-branch and the edge of the carrier is 0.5 mm. The length of the first pad and the second pad is 4±0.5 mm, and the width of the first pad and the second pad is 3 mm±0.5 mm.

2. The omni-directional fiberglass antenna of claim 1, wherein, The antenna feed branch, the antenna ground branch, the antenna short-circuit branch, and the plurality of pads are integrated in one body.

3. The omni-directional fiberglass antenna of claim 1, wherein, The frequency band supported by the omnidirectional glass steel antenna comprises 470 MHz-510 MHz.

4. The omni-directional fiberglass antenna of claim 3, wherein, The omnidirectional glass steel antenna comprises one or more omnidirectional glass steel antennas as claimed in any one of claims 1-10.

5. The omni-directional fiberglass antenna of claim 1, wherein, The omnidirectional glass steel antenna further comprises a transmitting device connected to the omnidirectional glass steel antenna, a receiving device connected to the omnidirectional glass steel antenna, and a processing device connected to the transmitting device and the receiving device. ​ ​ ​ 6. The omni-directional fiberglass antenna of claim 1, wherein, ​ 7. The omni-directional fiberglass antenna of claim 2, wherein, ​ 8. The omni-directional fiberglass antenna of claim 3, wherein, ​ 9. The omni-directional fiberglass antenna according to any of claims 1-8, characterized by ​ 10. The omni-directional fiberglass antenna according to any of claims 1-8, wherein, ​ 11. A fire detection apparatus, characterized by ​ ​ 12. The fire detection apparatus of claim 11, wherein ​ ​ ​ ​ ​

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