Buried oblique radiation antenna combination structure
By using a buried oblique radiating antenna combination structure, the problem of difficult control of the identification range of UHF RFID technology in anti-theft systems is solved, achieving a smaller clearance area and fewer false alarms, and improving the control capability of the identification range.
Patent Information
- Application Number
- CN202422899280.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-27
AI Technical Summary
UHF RFID technology has a long identification distance in anti-theft applications, but the identification range is difficult to control. This results in the need to demarcate a large area of clearance, making it impossible to place goods or carry unpaid goods through, which can easily lead to false alarms.
The system employs a buried oblique radiating antenna combination structure, which includes multiple antenna elements and an RFID reader/writer. These elements are connected via a power supply RF cable to form an antenna array. The polarization is circular, the operating frequency is 902-928MHz, and the antenna element spacing is 0.5-2 meters, thus forming a controllable identification range.
It significantly improves the control of the identification range, reduces the need for clearance zones, prevents false alarms, and reduces the identification range by half compared to traditional systems.
Smart Images
Figure CN223612678U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of RFID, specifically is a buried inclined radiation antenna combination structure. BACKGROUND
[0002] In the garment, food, toy and other industries that have widely adopted RFID technology, it is attempted to use ultra-high frequency RFID technology to transform existing stores anti-theft systems based on acoustic magnetic or radio frequency technology. Compared with the traditional anti-theft system, the RFID anti-theft system can assign a unique identification code to each item, so that the anti-theft system can identify the specific item type and information, not just detect whether there is an unpaid item passing through the anti-theft area. By reading the unique ID of the item, RFID can help the store accurately locate the lost or stolen item.
[0003] However, due to the characteristics of ultra-high frequency RFID technology, such as long recognition distance and difficult to control the recognition range, it often needs to draw a large range of clearance area in actual anti-theft application. No goods can be placed in this area, and no unpaid goods can be carried through, otherwise it will cause false alarm. The clearance area of the side-standing RFID anti-theft channel door is usually more than 1.5 meters, and the clearance area requirement of the top-mounted RFID anti-theft system is usually higher, so the present application provides a buried inclined radiation antenna combination structure. SUMMARY
[0004] In view of the deficiencies of the prior art, the utility model provides a buried inclined radiation antenna combination structure, which solves the problem that due to the characteristics of ultra-high frequency RFID technology, such as long recognition distance and difficult to control the recognition range, it often needs to draw a large range of clearance area in actual anti-theft application. No goods can be placed in this area, and no unpaid goods can be carried through, otherwise it will cause false alarm.
[0005] To achieve the above purpose, the utility model realizes through the following technical scheme: a buried inclined radiation antenna combination structure, comprising an antenna combination structure, the antenna combination structure comprises an RFID reader and an antenna unit;
[0006] The antenna unit is provided with a plurality of, and the RFID reader and the plurality of antenna units are provided with a feed radio frequency cable;
[0007] The RFID reader and the plurality of antenna units are buried;
[0008] The antenna unit is provided with a plurality of sub-antennas, and the plurality of sub-antennas form an antenna array.
[0009] Preferably, the number of antenna units is set to between 2 and 16.
[0010] Preferably, the number of sub-antennas on each of the antenna units is set to between 2-8.
[0011] Preferably, the polarization mode of the antenna units is circular polarization.
[0012] Preferably, the operating frequency of the antenna units is set to between 902-928MHz.
[0013] Preferably, the plurality of antenna units are arranged in a row, and the center distance between each other is between 0.5-2 meters.
[0014] The beneficial effects of the present application are as follows:
[0015] The buried oblique radiation antenna combination structure adopts 2 to 8 sub-antennas 121 to form an antenna array as an oblique radiation antenna unit 12, which forms a radiation directivity obviously towards the outside of the store, and the maximum radiation gain in the outside direction is more than 6dB stronger than the maximum radiation gain in the inside direction. 2 to 16 buried antenna units 12 are connected to the same buried RFID reader through a feed radio frequency cable, and the spacing between the plurality of antenna units 12 is 0.5 to 2 meters, thereby forming a buried oblique radiation antenna combination structure that can be used for retail store anti-theft. The antenna combination structure greatly improves the identification range control and the ability to prevent false alarms of the traditional RFID anti-theft channel door and the top-mounted RFID anti-theft system. The clearance requirement is only half of the traditional RFID anti-theft channel door and the top-mounted RFID anti-theft system. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0017] Fig. 1 It is a structural schematic diagram of the present application;
[0018] Fig. 2 It is a radiation direction schematic diagram of the antenna unit of the present application;
[0019] Fig. 3 It is a structural schematic diagram of the antenna unit of the present application.
[0020] In the figure: 1, antenna combination structure; 11, RFID reader; 12, antenna unit; 121, sub-antenna; 13, feed radio frequency cable. DETAILED DESCRIPTION
[0021] For better understanding of the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments of the specification.
[0022] The utility model discloses an underground inclined radiation antenna combination structure, according to the attached Figs. 1-3 As shown, comprising antenna combination structure 1, antenna combination structure 1 includes RFID reader 11 and antenna unit 12;
[0023] Antenna unit 12 sets up multiple, and RFID reader 11 and multiple antenna unit 12 between all be provided with feed radio frequency cable 13;
[0024] RFID reader 11 and multiple antenna unit 12 all carry out the underground setting;
[0025] Underground setting refers to that RFID reader 11 and multiple antenna unit 12 and the feed radio frequency cable 13 connected are buried under the ground brick, floor, carpet and toughened glass used in retail store ground.
[0026] Antenna unit 12 is provided with multiple sub-antennas 121, and multiple sub-antennas 121 form antenna array.
[0027] Further, the number of antenna unit 12 is set to be between 2-16.
[0028] Further, the number of sub-antennas 121 on each antenna unit 12 is set to be between 2-8.
[0029] Further, the polarization mode of antenna unit 12 is circular polarization.
[0030] Further, the working frequency of antenna unit 12 is set to be between 902-928MHz.
[0031] Further, multiple antenna units 12 are arranged in a row, and the center spacing between each other is between 0.5-2 meters.
[0032] It needs to be emphasized that a group of underground antenna units 12 are controlled by RFID reader 11 to work alternately, according to the actual area, and a group and multiple groups of underground antenna units 12 can form an anti-theft identification area covering the entire store door range.
[0033] It needs to be emphasized that RFID reader 11 radiates ultra-high frequency RFID tags within the radiation range of antenna unit 12, and receives signal data returned by the RFID tags through antenna unit 12. Finally, the data identified is uploaded through one of the following four communication modes and combined mode. The four communication modes are serial port, Ethernet, WI FI and Bluetooth.
[0034] The antenna array formed by 2 to 8 sub-antennas 121 as the oblique radiation antenna unit 12 constitutes the radiation direction obviously towards the outside of the store, and the maximum radiation gain of the outside of the store is more than 6dB stronger than that of the inside of the store. 2 to 16 buried antenna units 12 are connected to the same buried RFID reader 11 through the feeding radio frequency cable 13, the spacing between the multiple antenna units 12 is 0.5 to 2 meters, thereby forming the buried oblique radiation antenna combination structure 1 which can be used as the retail store anti-theft. The antenna combination structure 1 greatly improves the identification range control and the ability to prevent false alarms of the conventional RFID anti-theft channel door and the top-mounted RFID anti-theft system. The clearance requirement is only half of that of the conventional RFID anti-theft channel door and the top-mounted RFID anti-theft system.
[0035] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A buried inclined radiating antenna combination structure comprising an antenna combination structure (1), characterized in that, The antenna combination structure (1) comprises an RFID reader-writer (11) and an antenna unit (12); The antenna unit (12) is provided in plurality, and a feeding radio frequency cable (13) is arranged between the RFID reader-writer (11) and the plurality of antenna units (12); The RFID reader-writer (11) and the plurality of antenna units (12) are both arranged to be buried; The antenna unit (12) is provided with a plurality of sub-antennas (121), and the plurality of sub-antennas (121) form an antenna array.
2. The buried slant radiating antenna combination structure according to claim 1, wherein The number of the antenna units (12) is set to be between 2 and 16.
3. The buried slant radiating antenna combination structure according to claim 1, wherein The number of the sub-antennas (121) on each of the antenna units (12) is set to be between 2 and 8.
4. The buried slant radiating antenna combination structure according to claim 1, wherein The polarization mode of the antenna unit (12) is circular polarization.
5. The buried slant radiating antenna combination structure according to claim 1, wherein The working frequency of the antenna unit (12) is set to be between 902 and 928 MHz.
6. The buried slant radiating antenna combination structure according to claim 1, wherein The plurality of antenna units (12) are arranged in a row, and the center distance between each other is between 0.5 and 2 meters.