Antenna device and zigbee module

Abstract

The application provides an antenna device and a ZigBee module. The antenna device comprises a feed source, a ground connection part and a radiator. The feed source comprises a feed point part and a feed ground part, and the feed point part is opposite to and spaced apart from the feed ground part. The ground connection part is connected to the feed ground part. The radiator and the ground connection part extend along a first direction and a second direction respectively. The first direction and the second direction are opposite to each other. The radiator comprises a first radiation part, a second radiation part, a third radiation part and a fourth radiation part which are sequentially connected along the second direction. The first radiation part is connected to the feed point part and forms a gap with the ground connection part. The second radiation part is arranged in a serpentine shape. The fourth radiation part comprises a bending segment, and the end of the bending segment is spaced apart from and opposite to the third radiation part. In this way, the antenna device can work in a specified frequency band, and has higher antenna gain and better radiation efficiency without increasing the size area, thereby improving the performance of the antenna device.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically, to an antenna device and a ZigBee module. Background Technology

[0002] With the development of wireless communication technology, ZigBee technology has been widely accepted due to its low power consumption, low cost, and low complexity. However, the antenna devices in most ZigBee modules currently have poor performance and cannot meet usage requirements. Summary of the Invention

[0003] The present invention provides an antenna device to improve at least one of the above-mentioned problems.

[0004] The embodiments of the present invention achieve the above objectives through the following technical solutions.

[0005] In a first aspect, embodiments of the present invention provide an antenna device. The antenna device includes a feed source, a ground connection portion, and a radiator. The feed source includes a feed point portion and a ground feed portion, which are opposite to and spaced apart from each other. The ground connection portion is connected to the ground feed portion. The radiator and the ground connection portion extend along a first direction and a second direction, respectively. The first direction and the second direction are opposite to each other. The radiator includes a first radiating portion, a second radiating portion, a third radiating portion, and a fourth radiating portion connected sequentially along the second direction. The first radiating portion is connected to the feed point portion and forms a gap with the ground connection portion. The second radiating portion is arranged in a serpentine bend. The fourth radiating portion includes a bent section, the end of which is spaced apart from and opposite to the third radiating portion.

[0006] In some embodiments, the grounding connection includes a first grounding connection segment and a second grounding connection segment. The first grounding connection segment and the second grounding connection segment are disposed opposite to each other and spaced apart, and connected to the feed point. The feed point is located between the first grounding connection segment and the second grounding connection segment. A first gap is formed between the ends of the first grounding connection segment and the second grounding connection segment facing the radiator. A first radiating segment passes through the first gap and is connected to the feed point. A second gap is formed between the first radiating segment and the ends of the first grounding connection segment and the second grounding connection segment facing the radiator. The gap includes the first gap and the second gap.

[0007] In some embodiments, the first radiating portion includes a first radiating segment, a second radiating segment, and a third radiating segment connected in sequence. The end of the first radiating segment away from the second radiating segment is connected to a feed point portion, and portions of the first and second radiating segments are located within a first gap. The end of the third radiating segment away from the second radiating segment is connected to the second radiating portion, and the third radiating segment, along with the first and second grounding connection segments, forms a second gap.

[0008] In some implementations, the wiring width of the first radiating segment is smaller than the wiring width of the second radiating segment, and the wiring width of the second radiating segment is smaller than the wiring width of the third radiating segment.

[0009] In some implementations, the wiring length of the first radiating segment is less than the wiring length of the second radiating segment, and the wiring length of the second radiating segment is less than the wiring length of the third radiating segment.

[0010] In some embodiments, the second radiating portion includes a first curved section and a second curved section connected together. The first curved section is connected between the first radiating portion and the second curved section. The second curved section is connected between the first curved section and the third radiating portion. The wiring width of the first curved section is greater than the wiring width of the second curved section.

[0011] In some embodiments, the wiring width of the first bending section is 0.44 to 0.46 mm, and the wiring width of the second bending section is 0.40 to 0.42 mm.

[0012] In some embodiments, the length of the first curved segment extending along the first direction is greater than the length of the second curved segment extending along the first direction, and the width of the first curved segment is greater than the width of the second curved segment.

[0013] In some embodiments, the fourth radiating portion includes a connecting section and a bent section connected together. The end of the connecting section away from the bent section is connected to the third radiating portion. The bent section includes a first sub-segment and a second sub-segment connected together. The end of the first sub-segment away from the second sub-segment is connected to the connecting section, and the first sub-segment is perpendicular to the connecting section. The second sub-segment is parallel to the connecting section, and the end of the second sub-segment away from the first segment is spaced apart from and opposite to the third radiating portion.

[0014] This invention also provides a ZigBee module. The ZigBee module includes a circuit board and an antenna device according to any of the above embodiments. The antenna device is electrically connected to the circuit board.

[0015] This invention provides an antenna device and a ZigBee module. The antenna device includes a feed source, a ground connection portion, and a radiator. The feed source includes a feed point portion and a ground connection portion, which are opposite to and spaced apart from each other. The ground connection portion is connected to the ground connection portion. The radiator and the ground connection portion extend along a first direction and a second direction, respectively, with the first and second directions opposing each other. The radiator includes a first radiating portion, a second radiating portion, a third radiating portion, and a fourth radiating portion connected sequentially along the second direction. The first radiating portion is connected to the feed point portion, allowing it to generate a specified frequency band and forming a gap with the ground connection portion. This facilitates adjusting the distance between the first and ground connection portions and adjusting the waveform depth. Furthermore, the second radiating portion is arranged in a serpentine curve, thereby improving the gain of the antenna device. Additionally, the fourth radiating portion includes a bent section, the end of which is spaced apart from and opposite to the third radiating portion, facilitating frequency adjustment of the antenna. Thus, the antenna device improves efficiency and gain without increasing its size, enhancing its performance and meeting the requirements of wireless transmission. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the antenna device provided in an embodiment of the present invention is shown.

[0018] Figure 2 It shows Figure 1 A magnified view of point P in the middle.

[0019] Figure 3 A partial dimensional schematic diagram of the antenna device provided in an embodiment of the present invention is shown.

[0020] Figure 4 A schematic diagram showing another portion of the dimensions of the antenna device provided in an embodiment of the present invention is shown.

[0021] Figure 5 A schematic diagram of the position of the antenna device provided in the embodiment of the present invention in a spatial rectangular coordinate system is shown.

[0022] Figure 6 It shows Figure 5 A schematic diagram of the radiation direction of the antenna device at 2400MHz.

[0023] Figure 7 It shows Figure 6 A schematic diagram of the H-plane radiation direction of the antenna device at 2400MHz.

[0024] Figure 8 It shows Figure 6 A schematic diagram of the radiation direction of the antenna device in the E1 plane at 2400MHz.

[0025] Figure 9 It shows Figure 6 A schematic diagram of the radiation direction of the antenna device in the E2 plane at 2400MHz.

[0026] Figure 10 It shows Figure 5 A schematic diagram of the radiation direction of the antenna device at 2450MHz.

[0027] Figure 11 It shows Figure 10 A schematic diagram of the H-plane radiation direction of the antenna device at 2450MHz.

[0028] Figure 12 It shows Figure 10 A schematic diagram of the radiation direction of the antenna device in the E1 plane at 2450MHz.

[0029] Figure 13 It shows Figure 10 A schematic diagram of the radiation direction of the antenna device in the E2 plane at 2450MHz.

[0030] Figure 14 It shows Figure 5 A schematic diagram of the radiation direction of the antenna device at 2500MHz.

[0031] Figure 15 It shows Figure 14 A schematic diagram of the H-plane radiation direction of the antenna device at 2500MHz.

[0032] Figure 16 It shows Figure 14 A schematic diagram of the radiation direction of the antenna device in the E1 plane at 2500MHz.

[0033] Figure 17 It shows Figure 14 A schematic diagram of the radiation direction of the antenna device in the E2 plane at 2500MHz.

[0034] Figure 18 A schematic diagram of the structure of the ZigBee module provided in an embodiment of the present invention is shown. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] ZigBee is a low-power local area network (LAN) protocol based on the IEEE 802.15.4 standard. It features low power consumption, low cost, low complexity, strong anti-interference capabilities, and large network capacity, supporting various network topologies such as mesh, star, and tree networks. ZigBee uses three different operating frequency bands: 2.4 GHz, 868 MHz, and 433 MHz, with 2.4 GHz being the mainstream operating frequency band.

[0038] In practical research, the inventors of this application discovered that adjusting the wiring method of the antenna device can effectively regulate the antenna's radiation operating frequency, efficiency, and antenna gain. Therefore, designing the wiring spacing and length of the antenna device is a crucial factor in improving antenna performance.

[0039] Therefore, this invention proposes an antenna device that can be installed in a ZigBee module to generate an operating frequency band around 2.4 GHz. In the following embodiments, the application of the antenna device in the ZigBee module of a gateway device is mainly used as an example for description; other situations requiring an antenna device can be referred to in the implementation.

[0040] Please see Figure 1 and Figure 2 The antenna device 10 includes a feed 100, a ground connection 200, and a radiator 300. The feed 100 is connected to the ground connection 200 and the radiator 300. The feed 100 can feed a current signal into the radiator 300, enabling the radiator 300 to operate in a specified frequency band, such as a frequency band around 2.4 GHz. The ground connection can adjust the frequency and bandwidth of the antenna device 10. Thus, the performance of the antenna device 10 can be improved by adjusting the position and shape of the feed 100, the ground connection 200, and the radiator 300.

[0041] The feed source 100 includes a feed point section 110 and a ground feed section 120. The feed point section 110 and the ground feed section 120 are opposite to each other and spaced apart, thereby avoiding the feed point section 110 and the ground feed section 120 from being connected to each other and causing a short circuit.

[0042] The feed point 110 includes a first gold plating layer 111, which is plated with metallic gold. The first gold plating layer 111 can enhance the conduction characteristics between the feed point 110 and the radiator 300, which is beneficial for better oxidation resistance and less susceptible to air corrosion, while also helping to reduce signal interference and loss.

[0043] The ground feed section 120 also includes a second gold plating layer 121, which is plated with metallic gold. The second gold plating layer 121 can enhance the conductivity between the ground feed section 120 and the ground connection section 200, which is beneficial for better oxidation resistance and less susceptible to air corrosion, while also helping to reduce signal ground interference and loss.

[0044] A gap 400 is formed between the grounding connection 200 and the radiator 300. The grounding connection 200 and the radiator 300 extend in opposite directions. One end of the radiator 300 facing the grounding connection 200 extends into the gap 400, which helps to maintain the distance between the grounding connection 200 and the radiator 300, thereby facilitating the adjustment of the waveform (current or voltage waveform).

[0045] The grounding connection portion 200 may include a first grounding connection segment 210 and a second grounding connection segment 220. The first grounding connection segment 210 and the second grounding connection segment 220 are arranged opposite to each other and spaced apart, and are connected to the ground feed portion 120. The ground feed portion 120 is located between the first grounding connection segment 210 and the second grounding connection segment 220, thereby facilitating the formation of a gap 400 between the grounding connection portion 200 and the radiator 300, and making it convenient for the grounding connection portion 200 and the radiator 300 to maintain a distance.

[0046] The radiator 300 and the grounding connection 200 are respectively along the first direction (e.g. Figure 1 (in the X direction) and the second direction (e.g.) Figure 1 Extending in the Y direction, the first and second directions are opposite to each other. The radiator 300 includes a first radiating part 310, a second radiating part 320, a third radiating part 330 and a fourth radiating part 340 connected sequentially along the first direction. The first radiating part 310, the second radiating part 320, the third radiating part 330 and the fourth radiating part 340 work together and cooperate in an orderly manner, which is beneficial to the radiator 300 in transmitting and receiving signals.

[0047] The first radiating section 310 is connected to the feed point section 110, so that the feed point section 110 feeds a current signal to the first radiating section 310, which is beneficial for the first radiating section 310 to operate in the frequency band near 2.4 GHz, thereby receiving and transmitting signals. The first radiating section 310 and the ground connection section 200 form a gap 400, wherein the gap 400 includes a first gap 401. The first radiating part 310 passes through the first gap 401 and is connected to the feed point part 110. The first gap 401 is formed between the first ground connection section 210 and the second ground connection section 220 facing the end of the radiator 300. That is, the end of the first radiating part 310 near the ground connection section 200 extends into the space between the first ground connection section 200 and the second ground connection section 200. The ends of the first ground connection section 200 near the radiator 300 and the second ground connection section 200 near the radiator 300 are respectively located on both sides of the end of the first radiating part 310 near the ground feed part 120, thereby forming the first gap 401 between the end of the first radiating part 310 near the ground feed part 120 and the ends of the first ground connection section 200 near the radiator 300 and the second ground connection section 200 near the radiator 300, thus keeping the radiator 300 and the ground connection section 200 at a distance.

[0048] Furthermore, gap 400 may also include a second gap 402. The second gap 402 communicates with the first gap 401. The second gap 402 is formed between the first radiating section 310 and the end of the first ground connection section 210 and the second connection section 341 facing the radiator 300. Specifically, the first radiating section 310 may include a first radiating section 311, a second radiating section 312, and a third radiating section 313 connected in sequence. The end of the first radiating section 311 away from the second radiating section 312 is connected to the feed section 110. Parts of the first radiating section 311 and the second radiating section 312 are located in the first gap 401. The end of the third radiating section 313 away from the second radiating section 312 is connected to the second radiating section 320. The third radiating section 313, the first ground connection section 210, and the second ground connection section 220 are spaced apart to form the second gap 402. Thus, the first radiating section 311, the second radiating section 312, and the third radiating section 313 in the antenna device 10 are mainly used for receiving and transmitting signals. For example, the first radiation segment 311, the second radiation segment 312, and the third radiation segment 313 can generate a frequency band around 2.4 GHz, thereby meeting the usage requirements.

[0049] Please see Figure 3In some embodiments, the wiring width of the first radiating segment 311 is smaller than the wiring width of the second radiating segment 312, and the wiring width of the second radiating segment 312 is smaller than the wiring width of the third radiating segment 313, thereby improving the efficiency and gain of the antenna device 10. In this embodiment, the wiring width of the first radiating segment 311 is L1, where L1 ranges from 0.9 to 1.1 mm, for example, L1 can be 1 mm. The wiring width of the second radiating segment 312 is L2, where L2 ranges from 2.0 to 2.5 mm, for example, L2 can be 2.22 mm. The wiring width of the third radiating segment 313 is L3, where L3 ranges from 6.0 to 6.8 mm, for example, L3 can be 6.4 mm.

[0050] In some embodiments, the wiring length of the first radiating segment 311 is shorter than the wiring length of the second radiating segment 312, and the wiring length of the second radiating segment 312 is shorter than the wiring length of the third radiating segment 313, which is beneficial to improving the efficiency and gain of the antenna device 10. In this embodiment, the wiring length of the first radiating segment 311 is L4, where L4 ranges from 2.5 to 3.5 mm, for example, L4 can be 3 mm. The wiring length of the second radiating segment 312 is L5, where L5 ranges from 7 to 7.5 mm, for example, L5 can be 7.25 mm. The wiring length of the third radiating segment 313 is L6, where L6 ranges from 15 to 25 mm, for example, L6 can be 20 mm.

[0051] The second radiating section 320 has a generally serpentine outline, thereby increasing the gain of the antenna device 10. One end of the second radiating section 320 is connected to the first radiating section 310, and the other end of the second radiating section 320 is connected to the third radiating section 330, thereby connecting the second radiating section 320 between the first radiating section 310 and the third radiating section 330.

[0052] Furthermore, the second radiating section 320 extends generally along the first direction. The second radiating section 320 includes a first curved section 321 and a second curved section 322 connected together. The first curved section 321 connects the first radiating section 310 and the second curved section 322, and the second curved section 322 connects the first curved section 321 and the third radiating section 330. That is, one end of the first curved section 321 is connected to the third radiating section 313 of the first radiating section 310, the other end of the first curved section 321 is connected to one end of the second curved section 322, and the other end of the second curved section 322 is connected to the third radiating section 330. In this way, the second radiating section 320 can work in coordination with the first radiating section 310 and the third radiating section 330, thereby improving the performance of the antenna device 10.

[0053] In some embodiments, such as Figure 4As shown, the wiring width of the first curved section 321 is greater than the wiring width of the second curved section 322. This is beneficial for improving the gain of the antenna device 10. In this embodiment, the wiring width of the first curved section 321 is L7, where the value of L7 ranges from 0.44 to 0.46 mm, for example, L7 can be 0.45 mm. The wiring width of the second curved section 322 is L8, where the value of L8 ranges from 0.40 to 0.42 mm, for example, L8 can be 0.41 mm.

[0054] In some embodiments, the length of the first curved segment 321 extending along the first direction is greater than the length of the second curved segment 322 extending along the first direction, and the width of the first curved segment 321 is greater than the width of the second curved segment 322. In this embodiment, the length of the first curved segment 321 is L9, where L9 ranges from 9 to 11 mm, for example, L9 can be 10 mm. The length of the second curved segment 322 is L10, where L10 ranges from 4 to 6 mm, for example, L10 can be 5 mm. The width of the first curved segment 321 is L11, where L11 ranges from 6.2 to 6.6 mm, for example, L11 can be 6.4 mm. The length of the second curved segment 322 is L12, where L12 ranges from 3.2 to 3.8 mm, for example, L12 can be 3.52 mm. This is beneficial for improving the antenna gain, thereby improving the performance of the antenna device 10.

[0055] The third radiating section 330 is generally rectangular in shape. Specifically, one end of the third radiating section 330 is connected to the end of the second curved section 322 away from the first curved section 321, and the other end of the third radiating section 330 is connected to one end of the fourth radiating section 340. Because the third radiating section 330 is farther from the feed point 110, the frequency band generated by the third radiating section 330 is smaller than the frequency band generated by the first radiating section 310. In addition, the third radiating section 330 also serves to connect the second radiating section 320 and the fourth radiating section 340. In this embodiment, the wiring length of the third radiating section 330 is L13, where L13 ranges from 18 to 22 mm, for example, L13 can be 20 mm. The wiring width of the third radiating section 330 is L14, where L14 ranges from 3.2 to 3.8 mm, for example, L14 can be 3.52 mm. This allows the various parts of the antenna device 10 to work in coordination, thereby improving the performance of the antenna device 10.

[0056] The fourth radiating section 340 includes a connecting section 341 and a bending section 342. Specifically, in this embodiment, the wiring length of the connecting section 341 is L15, where L15 ranges from 12 to 18 mm, for example, L15 can be 15 mm. The wiring width of the connecting section 341 is L16, where L16 ranges from 0.6 to 1.0 mm, for example, L16 can be 0.85 mm. One end of the connecting section 341 is connected to the end of the second bending section 322 away from the first bending section 321, and the other end of the connecting section 341 is connected to one end of the bending section 342. The other end of the bending section 342 is spaced apart from and opposite to the third radiating section 330, thereby adjusting the frequency of the antenna device 10 so that the antenna device 10 meets the usage requirements and is beneficial to improving the performance of the antenna device 10. Furthermore, the bending segment 342 includes a first sub-segment 342a and a second sub-segment 342b connected to each other. In this embodiment, the wiring length of the first sub-segment 342a is L17, where L17 ranges from 3.2 to 3.8 mm, for example, L17 can be 3.52 mm. The wiring width of the first sub-segment 342a is L18, where L18 ranges from 0.6 to 1.0 mm, for example, L18 can be 0.85 mm. The wiring length of the second sub-segment 342b is L19, where L19 ranges from 5.2 to 5.8 mm, for example, L19 can be 5.50 mm. The wiring width of the second sub-segment 342b is L20, where L20 ranges from 0.6 to 1.0 mm, for example, L20 can be 0.85 mm. The end of the first sub-segment 342a away from the second sub-segment 342b is connected to the connecting segment 341. The first sub-segment 342a is perpendicular to the connecting segment 341, and the second sub-segment 342b is parallel to the connecting segment 341. The end of the second sub-segment 342b away from the first sub-segment 342a is spaced apart from and opposite to the third radiating part 330, which is beneficial for adjusting the frequency of the antenna device 10, so that the antenna device 10 meets the usage requirements and is beneficial for improving the performance of the antenna device 10.

[0057] Please refer to Table 1, which shows the frequencies and VSWR values ​​of multiple measurement points of the antenna device 10 of the above embodiment obtained by testing with a network analyzer.

[0058] Table 1

[0059] Frequency (MHz) 2400 2450 2500 Standing wave ratio 1.37 1.22 1.56

[0060] As can be seen from the above standing wave ratio, most antenna devices 10 applied to 2.4GHz have a standing wave ratio in the range of 1.5 to 1.7. Therefore, the antenna device 10 of the present application embodiment has the advantage of a low standing wave ratio.

[0061] Please refer to Table 2. The gain and efficiency of the antenna device 10 according to the above embodiment at different frequencies are shown in Table 2 in actual testing.

[0062] Table 2

[0063]

[0064]

[0065] The test data in Table 2 shows that in the 2400-2500MHz frequency band, the maximum gain is between 3.27 and 3.37 dBi, and the radiation efficiency is between 67.9% and 75.17%. The antenna device 10 of this embodiment achieves a radiation efficiency higher than 65% in the transmitting and receiving frequency band near 2.4GHz (generally, a radiation efficiency of 60% is sufficient). The maximum gain and radiation efficiency of the antenna device 10 are significantly higher, meeting the usage requirements.

[0066] Please see Figure 5 , Figure 5 The diagram shows the position of an antenna device 10 provided in this embodiment of the application in a spatial rectangular coordinate system. In the spatial rectangular coordinate system O-xyz, the antenna device 10 is located on the xOz coordinate plane, and the origin of the coordinate axis is approximately set at the middle position of the antenna device 10, which is beneficial for detecting the antenna device 10.

[0067] Please see Figures 6 to 9 , Figure 6 The diagram shows the radiation pattern of the antenna device 10 provided in this embodiment at 2400MHz in a spatial rectangular coordinate system. The center point of the graph represents the position of the antenna; the farther away from the center point, the greater the gain; and the darker the color, the greater the antenna gain. Figure 7 This is the radiation pattern of the H-plane (the plane containing the magnetic field and the direction of maximum radiation). Figure 8 This is the radiation pattern of the E1 plane (the E-plane is the plane containing the direction of maximum radiation and the electric field). Figure 9 This is the radiation pattern of the E2 plane (the E plane is the plane where the radiation is maximized and the electric field is located). Figures 7 to 9 The radiation patterns shown extend in multiple directions and have high gain. In other words, the antenna device 10 has high gain and efficiency in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10. It can also achieve omnidirectional radiation without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0068] Please see Figures 10 to 13 , Figure 10 The diagram shows the radiation pattern of the antenna device 10 provided in this embodiment at 2450MHz in a spatial rectangular coordinate system. The center point of the graph represents the position of the antenna; the farther away from the center point, the greater the gain; and the darker the color, the greater the antenna gain. Figure 11 This is the radiation pattern of the H-plane (the plane containing the magnetic field and the direction of maximum radiation). Figure 12 This is the radiation pattern of the E1 plane (the E-plane is the plane containing the direction of maximum radiation and the electric field). Figure 13 This is the radiation pattern of the E2 plane (the E plane is the plane where the radiation is maximized and the electric field is located). Figures 11 to 13 The radiation patterns shown extend in multiple directions and have high gain. In other words, the antenna device 10 has high gain and efficiency in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10. It can also achieve omnidirectional radiation without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0069] Please see Figures 14 to 17 , Figure 14 The diagram shows the radiation pattern of the antenna device 10 provided in this embodiment at 2500MHz in a spatial rectangular coordinate system. The center point of the graph represents the position of the antenna; the farther away from the center point, the greater the gain; and the darker the color, the greater the antenna gain. Figure 15 This is the radiation pattern of the H-plane (the plane containing the magnetic field and the direction of maximum radiation). Figure 16 This is the radiation pattern of the E1 plane (the E-plane is the plane containing the direction of maximum radiation and the electric field). Figure 17 This is the radiation pattern of the E2 plane (the E plane is the plane where the radiation is maximized and the electric field is located). Figures 15 to 17 The radiation patterns shown extend in multiple directions and have high gain. In other words, the antenna device 10 has high gain and efficiency in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10. It can also achieve omnidirectional radiation without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0070] Please see Figure 18 The present invention also proposes a ZigBee module 20, which can be applied in a gateway device. The ZigBee module 20 includes a circuit board (not shown) and the antenna device 10 described in the above embodiments. The specific structure of the antenna device 10 is as described in the above embodiments. Since the ZigBee module 20 adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above-described antenna device 10 embodiments, which will not be elaborated further here.

[0071] In some embodiments, the ZigBee module 20 further includes a dielectric substrate 500 for carrying the antenna device 10, which can be electrically connected to the circuit board via a coaxial cable (not shown). The coaxial cable has a plug, and the circuit board has a socket. The plug is inserted into the socket, thereby connecting the antenna device 10 to the circuit board, and enabling the radio frequency circuit of the circuit board to transmit signals to the feed source 100.

[0072] In this invention, unless otherwise explicitly specified or limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a transmission connection; they can be a direct connection or an indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as referring to specific or particular structures. The description of "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this invention, as well as the features of different embodiments or examples.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An antenna device, characterized by include: The feed source includes a feed point section and a ground feed section, wherein the feed point section and the ground feed section are opposite to each other and spaced apart; A grounding connection part, which is connected to the ground feed part; as well as A radiator and a grounding connection portion extend along a first direction and a second direction, respectively, with the first direction and the second direction being opposite to each other. The radiator includes a first radiating portion, a second radiating portion, a third radiating portion, and a fourth radiating portion connected sequentially along the first direction. The first radiating portion is connected to the feed point portion and forms a gap with the grounding connection portion. The second radiating portion is arranged in a serpentine bend. The fourth radiating portion includes a bent section, the end of which is spaced apart from and opposite to the third radiating portion. The second radiating section includes a first curved section and a second curved section connected together. The first curved section is connected between the first radiating section and the second curved section, and the second curved section is connected between the first curved section and the third radiating section. The wiring width of the first curved section is greater than the wiring width of the second curved section, and the length of the first curved section extending along the first direction is greater than the length of the second curved section extending along the first direction.

2. The antenna device of claim 1, wherein The grounding connection includes a first grounding connection segment and a second grounding connection segment. The first grounding connection segment and the second grounding connection segment are arranged opposite to each other and spaced apart, and connected to the feed point. The feed point is located between the first grounding connection segment and the second grounding connection segment. A first gap is formed between the ends of the first grounding connection segment and the second grounding connection segment facing the radiator. The first radiating part passes through the first gap and is connected to the feed point. A second gap is formed between the first radiating part and the ends of the first grounding connection segment and the second grounding connection segment facing the radiator. The gap includes the first gap and the second gap.

3. The antenna device of claim 2, wherein, The first radiating section includes a first radiating segment, a second radiating segment, and a third radiating segment connected in sequence. The end of the first radiating segment away from the second radiating segment is connected to the feed point section. A portion of the first radiating segment and the second radiating segment are located in the first gap. The end of the third radiating segment away from the second radiating segment is connected to the second radiating section. The third radiating segment is spaced apart from the first grounding connection segment and the second grounding connection segment to form the second gap.

4. The antenna device of claim 3, wherein The wiring width of the first radiating segment is smaller than the wiring width of the second radiating segment, and the wiring width of the second radiating segment is smaller than the wiring width of the third radiating segment.

5. The antenna device of claim 4, wherein, The wiring length of the first radiating segment is less than the wiring length of the second radiating segment, and the wiring length of the second radiating segment is less than the wiring length of the third radiating segment.

6. The antenna device of claim 1, wherein, The wiring width of the first bending section is 0.44~0.46mm, and the wiring width of the second bending section is 0.40~0.42mm.

7. The antenna device of claim 1, wherein, The fourth radiating section includes a connecting section and a bent section connected together. The end of the connecting section away from the bent section is connected to the third radiating section. The bent section includes a first sub-segment and a second sub-segment connected together. The end of the first sub-segment away from the second sub-segment is connected to the connecting section. The first sub-segment is perpendicular to the connecting section, and the second sub-segment is parallel to the connecting section. The end of the second sub-segment away from the first sub-segment is spaced apart from and opposite to the third radiating section.

8. A ZigBee module characterized in that, include Circuit boards; and The antenna device according to any one of claims 1 to 7, wherein the antenna device is electrically connected to the circuit board.

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