CN220829720U

CN220829720U - TAG label

Info

Publication number: CN220829720U
Application number: CN202322574705.1U
Authority: CN
Inventors: 张强
Original assignee: Shenzhen Feirui Intelligent Co ltd
Current assignee: Shenzhen Feirui Intelligent Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-23
Anticipated expiration: 2033-09-21

Abstract

The utility model provides a TAG TAG, which comprises a circuit board and an antenna, wherein a UWB accurate positioning circuit module and a Bluetooth communication circuit module are arranged on the circuit board, and the antenna comprises a UWB antenna and a BLE antenna; the UWB antenna is arranged on one side of the circuit board, the BLE antenna is arranged on the other side of the circuit board, and the UWB antenna is a monopole antenna. The TAG label adopting the scheme can be applied to accurate object searching, high-precision indoor positioning, industrial, storage and robot positioning and navigation.

Description

TAG label

Technical Field

The utility model relates to the field of communication, in particular to a TAG label.

Background

Along with the popularization of intelligent terminals, huge indoor and outdoor positioning demands are generated, and the communication technology with high bandwidth and ultra-low time delay is more helpful for the rapid growth of the indoor and outdoor positioning service market due to the advent of 5G technology. For outdoor positioning, solutions based on GPS or beidou systems are often employed. Indoor positioning is realized by positioning technology based on Bluetooth, wifi, geomagnetism and ultra wideband.

UWB (UltraWideband) is a carrier-free communication technique that uses non-sinusoidal narrow pulses on the order of nanoseconds to picoseconds to transmit data. By transmitting extremely low-power signals in a wider frequency spectrum, UWB can realize data transmission rates ranging from hundreds of Mbit/s to several Gbit/s in a range of about 10 meters, and UWB technology gradually becomes the first choice of high-precision indoor positioning technology due to the advantages of low power consumption, wide frequency band, strong anti-interference capability and high distance resolution (the distance measurement error is within 10 cm under the condition of visual range). At present, the technology mainly has the following application scenes: industry, storage, robot positioning and navigation; store, parking stall location and navigation of the mall. Besides commercial use, the application of the technology is gradually expanding for consumers, and the UWB positioning technology calculates the coordinates of the tag in a two-dimensional or three-dimensional scene by measuring the distance between the tag and a plurality of base stations, so that the positioning of the tag is realized.

In the prior art, devices with UWB and bluetooth functions often have a large size and cannot be used in TA G tags. The traditional UWB antenna is that patch antenna occupation area is bigger, because TAG label is the less object of volume, integration UWB antenna and bluetooth antenna are more difficult to realize according to traditional design in inside, do not have sufficient space to place the antenna.

Disclosure of utility model

In order to solve the problems in the prior art, the utility model provides a TAG TAG which integrates UWB and BLE antenna schemes, is used for UWB accurate positioning, and can be applied to accurate object searching, high-precision indoor positioning, industrial, storage and robot positioning and navigation.

In order to achieve the above purpose, the present utility model adopts the following scheme:

The utility model provides a TAG TAG, which comprises a circuit board and an antenna, wherein a UWB accurate positioning circuit module and a Bluetooth communication circuit module are arranged on the circuit board, and the antenna comprises a UWB antenna and a BLE antenna; the UWB antenna is arranged on one side of the circuit board, the BLE antenna is arranged on the other side of the circuit board, and the UWB antenna is a monopole antenna.

Further, the number of the UWB antennas is two, and the two UWB antennas are respectively arranged on the opposite sides of the circuit board.

Further, the UWB antenna is a monopole antenna, and the two UWB antennas are arranged along the same straight line.

Further, the UWB antenna operates at 7.75-8.25GHz.

Further, the BLE antenna is of an inverted-F type.

Further, the BLE antenna comprises a BLE antenna arm, a feed branch and a feed branch, wherein the feed branch is parallel to the feed branch and perpendicular to the BLE antenna arm respectively.

Further, the feed branch and the feed branch are arranged on the same side of the BLE antenna arm.

Further, the feed branch is connected with a signal point on the circuit board, and the ground feed branch is connected with the ground on the circuit board.

Further, the BLE antenna operates at 2.4-2.4835GHZ.

Further, the size of the circuit board is 25×26×0.9mm, three clearance areas corresponding to each antenna are reserved on the circuit board, and the clearance areas are BLE antenna areas respectively, and the size is 4mm×25mm×0.9mm; UWB-ANT1 region, 5 x 8 x 0.9mm in size; the UWB-ANT2 region has a size of 5 x 6 x 0.9mm.

The beneficial effects are that:

The TAG TAG provided by the utility model has the advantages that the UWB antenna is arranged in the form of the monopole antenna, the distance between the UWB antenna and the Bluetooth antenna is kept on the circuit board, the interference is reduced, the volume is reduced, and the TA G TAG can integrate UWB and Bluetooth antennas.

Drawings

FIG. 1 is a graph of UWB antenna efficiency according to an embodiment of the present utility model;

FIG. 2 is a return loss plot of a UWB antenna in an embodiment of the utility model;

FIG. 3 is a graph of UWB antenna isolation according to an embodiment of the present utility model;

Fig. 4 is a UWB-ANT1 pattern in an embodiment of the present utility model;

Fig. 5 is a UWB-ANT2 pattern in an embodiment of the present utility model;

figure 6 is a graph of BLE antenna return loss in an embodiment of the present utility model;

figure 7 is a graph of BLE antenna efficiency in an embodiment of the present utility model;

Figure 8 is a BLE antenna pattern in an embodiment of the present utility model;

FIG. 9 is an overall front view of the structure of the embodiment of the present utility model;

in the figure, a 1-PCB board and a 2-UWB circuit module are shown. The antenna comprises a 3-BLE circuit module, a 4-UWB antenna, a 5-BLE antenna, a 6-feed branch and a 7-feed ground branch.

Detailed Description

In order to make the technical solution and advantages of the present utility model more clear, the technical solution of the embodiments of the present utility model will be fully described below with reference to the accompanying drawings in the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The utility model provides a TAG label which is used for UWB accurate positioning. The TAG label can be used for accurate object searching, high-precision indoor positioning, industrial, storage and robot positioning and navigation.

In some embodiments, the present utility model solves the existing problem of integrating two UWB antennas and one BLE antenna on a 25 x 26mm PCB board. UWB antennas operate in the CH9 channel (CH 9 channel is occupied with little of this channel being less susceptible to interference) 7.75-8.25GHz band. BL E antennas operate at 2.4-2.4835GHZ.

The basic principle of TAG operation is that UWB parameters are exchanged by BLE connection establishment, so that the TAG and a measured object are connected in an initialization mode to bind the two objects. When the object is required to be found, UWB software can be opened during positioning. The distance and the angle of the object to be searched can be displayed on the UWB-APP interface, and accurate positioning of the object is achieved. UWB can realize 10-30 cm's accurate location, supports AoA angle location simultaneously, combines accurate distance and direction, just can realize the problem of quick accurate seek.

In some embodiments, the utility model provides a TAG, which comprises a circuit board and an antenna, wherein a UWB accurate positioning circuit module and a Bluetooth communication circuit module are arranged on the circuit board, and the antenna comprises a UWB antenna and a BLE antenna; the UWB antenna is arranged on one side of the circuit board, the BLE antenna is arranged on the other side of the circuit board, the number of the UWB antennas is two, the UWB antennas are monopole antennas (monopole PCB antennas are selected), and the two UWB antennas are respectively arranged on the opposite sides of the circuit board. The UWB antenna works at 7.75-8.25GHz, and the BLE antenna works at 2.4-2.4835GHZ. The BLE antenna is of an inverted-F type and comprises a BLE antenna arm, a feed branch and a feed ground branch, wherein the feed branch is parallel to the feed ground branch and is perpendicular to the BLE antenna arm respectively, the feed branch and the feed ground branch are arranged on the same side of the BLE antenna arm, the feed branch is connected with a signal point on the circuit board, and the feed ground branch is connected with the ground on the circuit board.

In some embodiments, the circuit board has a size of 25×26×0.9mm, and three headroom areas corresponding to each antenna are reserved on the circuit board, and are respectively BLE antenna areas, and the size is 4mm×25mm×0.9mm; UWB-ANT1 region, 5 x 8 x 0.9mm in size; the UWB-ANT2 region has a size of 5 x 6 x 0.9mm.

The TAG development board is a small-size object, and BLE transmission and UWB close-range accurate positioning are integrated on the TAG development board. The high-performance small-area UWB antenna and the BLE antenna are matched with each other, so that the functions of accurately positioning, searching and the like can be realized.

The following describes the scheme with reference to a specific embodiment, wherein the UWB circuit module 2 and the BLE circuit module 3 for bluetooth communication are integrally designed on a 25×26×0.9mmpc B board 1, and two UWB antennas 4 and one BLE antenna 5 are integrally designed on the PCB board 1. The two UWB antennas are in monopole forms as shown in the figures 9-1/2, the resonant points of the antennas can be controlled by adjusting the length of the radiating arms of the UWB antennas, the antennas are ensured to work at 7.75-8.25GHz, the two UWB antennas are designed at the side positions of the PCB shown in the figure 9, and a certain space is pulled apart to increase the isolation of the antennas so as to avoid the mutual influence of the antennas. The BLE is in an inverted F antenna form, and the inverted F has the advantages that the length of the main board ground antenna is shorter, the performance is stable and reliable, the resonant depth is adjusted by controlling the antenna standing wave return loss and the like through the distance and the height of the feed branch 6 and the feed branch 7, and the antenna is controlled to work at 2.4-2.4835GHZ by adjusting the length of the BLE antenna.

As shown in figure 1, the UWB antenna has higher overall efficiency, can reach more than 50% efficiency, and has good overall antenna effect; as shown in fig. 2, the passive performance of the antenna is better, and the performance of the antenna can meet the use requirement; as shown in FIG. 3, the isolation between the two UWB antennas is 31dB, and the two antennas cannot generate mutual interference phenomenon; as shown in fig. 4 and 5, the radiation directivity of the antenna can be seen by the directional diagrams of the two UWB antennas; as shown in fig. 6, the passive performance of the ble antenna is better; as shown in fig. 7, the efficiency of the ble antenna is high, and the overall efficiency can reach more than 48%; as in fig. 8, the directivity of the radiation of the antenna can be seen by the pattern of the ble antenna.

The basic principle of UWB antenna and BLE antenna operation is: firstly, establishing connection through BLE to exchange UWB parameters, and establishing initialization connection between TAG and the object to be tested to bind the two objects. When the object searching and positioning functions are needed, UWB software can be opened. The distance and the angle of the object to be searched can be displayed on the UWB-APP interface, and accurate positioning of the object is achieved. UWB can realize 10-30 cm's accurate location, supports AoA angle location simultaneously, combines accurate distance and direction, just can realize the problem of accurate seek fast.

The utility model has the following advantages:

1. The UWB module and the BLE module can enter a sleep mode when the wireless communication device is not in operation, and the power consumption is extremely low

2. The two UWB antennas are respectively used as transmitting and receiving antennas, do not interfere with each other, can save the cost of using a radio frequency switch on a radio frequency circuit and can reduce the loss caused by the switch

3. High isolation, the isolation of two UWB antennas in CH9 can reach below-15 dB

4. The occupied area of the antenna is extremely small, and the overall area of the design is effectively reduced

5. The anti-interference performance is strong, the transmission rate is high, the system capacity is large, and the transmission power is very small. The UWB system has very low transmit power, and the communication device can communicate with less than 1mW of transmit power. The low transmit power greatly prolongs the system power on time. Moreover, the emission power is small, and the influence of electromagnetic wave radiation on human bodies is small. The UWB adopts time-hopping spread spectrum signals, the system has larger processing gain, weak radio pulse signals are dispersed in a wide frequency band during transmission, and the output power is even lower than noise generated by common equipment. The signal energy is recovered during reception, and spreading gain is generated during despreading. Thus, UWB has stronger interference immunity than ieee802.11a, ieee802.11b, and bluetooth at the same code rate. The transmission rate is high. The data rate of UWB can reach several tens Mbit/s to several hundreds Mbit/s, hopefully 100 times higher than Bluetooth, and also can be higher than IEEE802.11a and IEEE802.11b.

IR-UWB has a frequency bandwidth above 1GHz, and a very large bandwidth ensures a low transmit power. In short-range wireless communication applications, the power of the UWB signal transmitted by the transmitter is lower than 1mW, which greatly prolongs the service life of the battery, ensures longer system working time and simultaneously has smaller radiation hazard to human bodies.

The two UWB antennas are high performance, very small size monopole PCB antennas with antenna body dimensions of only 4.5 x 1mm. The BLE antenna is in the form of an inverted F antenna, the design can ensure that the BLE antenna and the UWB antenna have high isolation while ensuring the performance of the BLE antenna and the UWB antenna, and the problems that the space of a small-sized product antenna is insufficient, the isolation is insufficient, the performance of the antenna is poor and the like can be solved.

The antenna scheme of the TAG has the characteristics of small volume, strong anti-interference performance, extremely wide bandwidth, small consumption of electric energy and good confidentiality.

In the description of the present specification, reference to the terms "one embodiment" and "example" and the like mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily aimed at being combined in a suitable manner in the opposite embodiments or examples.

It must be pointed out that the above description of the embodiments is not intended to be limiting but to assist in understanding the core idea of the utility model, and that any modifications to the utility model and alternatives equivalent to the present product, which do not depart from the principle of the utility model, are intended to be within the scope of the claims of the utility model.

Claims

1. The TAG TAG is characterized by comprising a circuit board and an antenna, wherein a UWB accurate positioning circuit module and a Bluetooth communication circuit module are arranged on the circuit board, and the antenna comprises a UWB antenna and a BLE antenna; the UWB antenna is arranged on one side of the circuit board, the BLE antenna is arranged on the other side of the circuit board, and the UWB antenna is a monopole antenna.

2. The TAG of claim 1, wherein the number of UWB antennas is two, the two UWB antennas being disposed on opposite sides of the circuit board, respectively.

3. The TAG of claim 2, wherein said UWB antenna is a monopole antenna, and wherein two of said UWB antennas are disposed along a same line.

4. A TAG according to claim 3, wherein the UWB antenna operates at 7.75-8.25GHz.

5. TAG according to claim 1, characterized in that the BLE antenna is of the inverted F type.

6. The TAG of claim 5, wherein said BLE antenna comprises a BLE antenna arm, a feed leg and a feed leg, said feed leg being parallel to the feed leg and perpendicular to the BLE antenna arm, respectively.

7. The TAG of claim 6, wherein said feed leg and feed leg are disposed on the same side of said BLE antenna arm.

8. The TAG of claim 6, wherein said feed leg connects signal points on said circuit board and said feed ground leg connects ground on said circuit board.

9. TAG according to claim 1, characterized in that the BLE antenna operates at 2.4-2.4835GHZ.

10. The TAG of claim 2, wherein said circuit board has a size of 25 x 26 x 0.9mm, and three headroom areas are reserved for each antenna, respectively BLE antenna areas, having a size of 4mm x 25mm x 0.9mm; UWB-ANT1 region, 5 x 8 x 0.9mm in size; the UWB-ANT2 region has a size of 5 x 6 x 0.9mm.