A combined antenna and intelligent parking management system

Abstract

The present application provides a combined antenna and an intelligent parking management system, wherein the combined antenna comprises an antenna housing, a WIFI omnidirectional antenna, a GPS / BDS active antenna, and a 4G omnidirectional antenna; the antenna housing is provided with an antenna outlet hole and a mounting structure; the WIFI omnidirectional antenna, the GPS / BDS active antenna, and the 4G omnidirectional antenna all comprise a circuit board, a cable, and a connector; the inner conductor at one end of the cable is electrically connected to the feed connection of the circuit board, the outer conductor is electrically connected to the ground connection of the circuit board, and the other end of the cable is electrically connected to the connector.

Description

Technical Field

[0001] The present application belongs to the technical field of communication antennas, and more specifically, to a combined antenna and an intelligent parking management system. Background Art

[0002] The terminal equipment covered by the wireless network of the intelligent parking management system includes the antenna built into the transceiver equipment. In terms of size, due to the size limitation of the internal space, the external dimensions of the antenna and the electrical dimensions on the transmission line are usually required to be miniaturized; in terms of performance, the performance of the antenna needs to adapt to the requirements of the transceiver equipment to obtain good electrical performance indicators.

[0003] In the existing technology, multi-frequency communication modules such as 4G (fourth generation mobile communication) band, WIFI band and GPS / BDS band have been applied to intelligent parking management systems. Especially in more complex communication module system applications, multi-mode collaborative work is required. Under the premise of multi-mode collaborative work, that is, before feeding the antenna, an additional impedance matching network design is required.

[0004] In this way, the design of the additional impedance matching network leads to the increase of the feeder design of the electronic system and the area of ​​the RF system. At the same time, the matching network introduces additional energy loss, which makes it difficult to meet the low-power system design requirements. It also makes it difficult to miniaturize and lighten the device size, and the device is large in size and heavy in weight, which makes it difficult to install conveniently, and the cost is high. It is difficult to make and difficult to mass produce. Therefore, miniaturized multi-mode technology has become one of the most important technologies in contemporary communication module integration systems.

[0005] Therefore, how to implement the application of three antennas in a miniaturized multi-mode communication module with limited outer shell size and space to meet the modern management of the entry and exit of internal and external vehicles by terminal devices covered by the wireless network of the intelligent parking management system is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a combined antenna, which has the advantages of small size, light weight, thin thickness, low cost, convenient installation, simple production and manufacturing, and easy large-scale production.

[0007] To achieve the above purpose, the technical solution adopted in this application is: to provide a combined antenna, which includes an antenna housing, a WIFI omnidirectional antenna, a GPS / BDS active antenna and a 4G omnidirectional antenna; wherein,

[0008] The shell wall of the antenna housing is provided with an antenna outlet hole and a mounting structure, and the mounting structure is used to connect a transceiver device;

[0009] The WIFI omnidirectional antenna includes a first circuit board, a first cable and a first connector; the inner conductor at one end of the first cable is electrically connected to the feed connection of the first circuit board, the outer conductor is electrically connected to the ground connection of the first circuit board, and the other end of the first cable is electrically connected to the first connector;

[0010] The 4G omnidirectional antenna includes a second circuit board, a second cable and a second connector; the inner conductor of one end of the second cable is electrically connected to the feed connection of the second circuit board, the outer conductor is electrically connected to the ground connection of the second circuit board, and the other end of the second cable is electrically connected to the second connector;

[0011] The GPS / BDS active antenna includes a third circuit board, a third cable and a third connector; the radiation oscillator and the shield are both electrically connected to the third circuit board, the inner conductor at one end of the third cable is electrically connected to the feed connection of the third circuit board, the outer conductor is electrically connected to the ground connection of the third circuit board, and the other end of the third cable is electrically connected to the third connector;

[0012] The first circuit board, the second circuit board and the third circuit board are all arranged inside the antenna housing, the first connector, the second connector and the third connector are all located outside the antenna housing, and the first cable, the second cable and the third cable are all passed through the antenna outlet hole.

[0013] In one embodiment, the first circuit board includes a ground plate, an impedance matcher 1, an impedance matcher 2, a radiation vibrator 1, a radiation vibrator 2, a phase shifter and a phase shifter transmission line arranged on the front side thereof, and a coupling ground plate arranged on the back side thereof;

[0014] The grounding plate and the coupling grounding plate are electrically connected through the grounding copper holes of the first circuit board; the impedance matcher 1 is electrically connected between the feeding connection and the impedance matcher 2, the radiating vibrator 1 is electrically connected between the impedance matcher 2 and the phase shifter, the radiating vibrator 2 is electrically connected to the phase shifter, and the radiating vibrator 1 and the radiating vibrator 2 are electrically connected through the phase shifter transmission line.

[0015] In one embodiment, the second circuit board includes a ground plate, a coupling vibrator, an impedance matcher, a phase shifter, a phase shifter transmission line and a radiation vibrator arranged on the front side thereof, and a coupling ground plate arranged on the back side thereof;

[0016] The grounding plate and the coupling grounding plate are electrically connected through the grounding copper holes on the second circuit board; the coupling vibrator is electrically connected between the feeding connection and the impedance matcher, the phase shifter is electrically connected between the impedance matcher and the radiating vibrator three, and the impedance matcher and the radiating vibrator three are electrically connected through the phase shifter transmission line.

[0017] In one embodiment, the GPS / BDS active antenna further includes a radiation vibrator and a shield, wherein the radiation vibrator and the shield are both electrically connected to the third circuit board, and the radiation vibrator and the shield are both disposed inside the antenna housing.

[0018] In one embodiment, the radiation vibrator is L-shaped, and a cross section of the radiation vibrator is convex.

[0019] In one embodiment, the antenna housing comprises a first half shell and a second half shell, and the first half shell and the second half shell are snap-fitted and docked.

[0020] In one embodiment, the antenna housing is columnar, the antenna wire hole is opened on the end side of the antenna housing, and the mounting structure is arranged on the peripheral side of the antenna housing.

[0021] In one embodiment, a module mounting hole and a module wire passing hole are also provided on the shell wall of the antenna shell;

[0022] The module mounting hole is used to mount a communication module of a transceiver device;

[0023] The module cable holes are used for routing cables of the communication modules of the transceiver equipment.

[0024] In one embodiment, the antenna housing is flat, and a cross section of the antenna housing is elliptical.

[0025] Compared with the prior art, the combined antenna provided by the present application has the following beneficial effects:

[0026] The combined antenna provided by the present application uses the antenna housing as a substrate, integrates three antennas, namely, a WIFI omnidirectional antenna, a GPS / BDS active antenna, and a 4G omnidirectional antenna, into the antenna housing, and uses a circuit board to replace the existing impedance matching network design. The antenna housing has a firm structure, and the mounting structure can be connected and matched with the transceiver equipment. The three antennas are small in size, light in weight, thin in thickness, and have excellent performance indicators. They can match the connection terminals in the transceiver equipment and can provide good radiation performance parameters. Through the mounting structure, the combined antenna provided by the present application can be easily disassembled and assembled, and it is low in cost, simple to produce, and easy to mass produce.

[0027] The combined antenna of the present invention is applied to the intelligent parking management system, the antenna shell is beautiful, the structure is firm, the three-dimensional sense of the curvature and streamline is strong, the installation and fixing holes are consistent with the connection of the transceiver equipment, the antenna is small in size, light in weight, thin in thickness, easy to install, low in cost, simple to produce, easy to mass produce, the antenna performance indicators are excellent, can match the connection end in the transceiver equipment and can provide better radiation performance parameters.

[0028] Another object of the present application is to provide an intelligent parking management system, which includes a transceiver device and the combined antenna as described above.

[0029] The beneficial effects of the intelligent parking management system provided by the present application compared with the prior art are the same as the beneficial effects of the combined antenna provided by the present application compared with the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 A schematic diagram of the structure of a combined antenna provided in an embodiment of the present application;

[0032] Figure 2 A front schematic diagram of an antenna housing provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the back side of the antenna housing provided in an embodiment of the present application;

[0034] Figure 4 An axial schematic diagram of an antenna housing provided in an embodiment of the present application;

[0035] Figure 5 A half-cut schematic diagram of an antenna housing provided in an embodiment of the present application;

[0036] Figure 6 A front schematic diagram of a WIFI omnidirectional antenna circuit board provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of the back side of the WIFI omnidirectional antenna circuit board provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of a phase shifter of a WIFI omnidirectional antenna circuit board provided in an embodiment of the present application;

[0039] Fig. 9 A front schematic diagram of a 4G omnidirectional antenna circuit board provided in an embodiment of the present application;

[0040] Fig.10 A schematic diagram of the back side of a 4G omnidirectional antenna circuit board provided in an embodiment of the present application;

[0041] Fig.11 A schematic diagram of a phase shifter of a 4G omnidirectional antenna circuit board provided in an embodiment of the present application;

[0042] Fig.12 A front schematic diagram of a GPS / BDS active antenna circuit board provided in an embodiment of the present application;

[0043] Fig.13 A schematic diagram of the back side of the GPS / BDS active antenna circuit board provided in an embodiment of the present application;

[0044] Fig.14 A schematic diagram of an L-shaped radiating element of a GPS / BDS active antenna provided in an embodiment of the present application;

[0045] Fig.15 A schematic diagram of a GPS / BDS active antenna shield provided in an embodiment of the present application;

[0046] Fig.16 The standing wave diagram of the WIFI omnidirectional antenna measured in the embodiment of the present application;

[0047] Fig.17 The standing wave diagram of the 4G omnidirectional antenna measured in the embodiment of the present application;

[0048] Fig.18 The standing wave diagram measured for the GPS / BDS active antenna provided in the embodiment of the present application;

[0049] Fig.19 A signal strength test diagram of the GPS / BDS active antenna provided in an embodiment of the present application;

[0050] Fig. 20 The directional diagram of the WIFI omnidirectional antenna provided in the embodiment of the present application tested at 2400MHz;

[0051] Fig.21 The directional diagram of the WIFI omnidirectional antenna provided in the embodiment of the present application tested at 2450MHz;

[0052] Fig. 22 The directional diagram of the WIFI omnidirectional antenna provided in the embodiment of the present application tested at 2483MHz;

[0053] Fig.23The directional diagram of the 4G omnidirectional antenna provided in the embodiment of the present application tested at 2500MHz;

[0054] Fig.24 The directional diagram of the 4G omnidirectional antenna provided in the embodiment of the present application tested at 2600 MHz;

[0055] Fig.25 This is the directional pattern of the 4G omnidirectional antenna provided in the embodiment of the present application tested at 2700 MHz. DETAILED DESCRIPTION

[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0058] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] The combined antenna and intelligent parking management system provided in the embodiments of the present application are now described.

[0061] Reference Figures 1 to 15 The combined antenna provided in the embodiment of the present application is applied to an intelligent parking management system.

[0062] The structural diagram of the combined antenna used in the intelligent parking management system provided in this application is as follows Figure 1As shown, the combined antenna includes an antenna housing 1 , a WIFI omnidirectional antenna 101 , a GPS / BDS active antenna 102 and a 4G omnidirectional antenna 103 .

[0063] The antenna housing 1 is in a flat columnar shape, and its cross section is close to an ellipse.

[0064] like Figure 2 and Figure 3 As shown, two module outlet holes 106 and 107 are provided at the front end side of the antenna housing 1. The module outlet holes 106 and 107 are used for routing wires of the communication module in the transceiver device.

[0065] An antenna cable outlet hole 109 is provided at the rear end side of the antenna housing 1 , and the antenna cable outlet hole 109 is used for routing cables in the WIFI omnidirectional antenna 101 , the GPS / BDS active antenna 102 and the 4G omnidirectional antenna 103 .

[0066] like Figure 2 and Figure 3 As shown, two opposite side walls of the peripheral side of the antenna housing 1 are each provided with a module mounting hole 104, 105, and the module mounting holes 104, 105 are used to mount and fix the communication module in the transceiver device.

[0067] like Figure 3 As shown, four mounting structures are provided on the back of the antenna housing 1. The mounting structures are preferably mounting fixing holes 108. The four mounting fixing holes 108 are distributed at the four vertex positions of the same rectangle and can be snapped onto the transceiver device by snapping, thereby installing the antenna housing 1 on the transceiver device.

[0068] like Figure 5 As shown, the antenna housing 1 includes two half shells 10, namely a first half shell and a second half shell. The first half shell and the second half shell are snap-fitted and docked. An operator can easily snap-fit ​​the two half shells or split the two half shells for convenient installation or removal.

[0069] In the embodiment of the present application, the WIFI omnidirectional antenna 101 includes a first circuit board, a first cable A1 and a first connector A2. The first circuit board is preferably a high-frequency double-sided copper-clad PCB board A. The inner conductor at one end of the first cable A1 is welded to the feed connection 204 of the high-frequency double-sided copper-clad PCB board A, the outer conductor is welded to the ground connection 203 of the high-frequency double-sided copper-clad PCB board A, and the other end of the first cable A1 is welded to the first connector A2.

[0070] In the embodiment of the present application, the 4G omnidirectional antenna 103 includes a second circuit board, a second cable B1 and a second connector B2. The second circuit board is preferably a high-frequency double-sided copper-clad PCB board B. The inner conductor at one end of the second cable B1 is welded to the feeding connection 304 of the high-frequency double-sided copper-clad PCB board B, the outer conductor is welded to the ground connection 303 of the high-frequency double-sided copper-clad PCB board B, and the other end of the second cable B1 is welded to the second connector B2.

[0071] In the embodiment of the present application, the GPS / BDS active antenna 102 includes a third circuit board C, an L-shaped radiating element D, a shield E, a third cable C1, and a third connector C2. The L-shaped radiating element D and the shield E are respectively welded and fixed to the third circuit board C, the inner conductor at one end of the third cable C1 is welded and fixed to the feed connection 401 on the third circuit board C, the outer conductor is welded and fixed to the ground connection 402 on the third circuit board C, and the other end of the third cable C1 is welded and fixed to the third connector C2.

[0072] Among them, the first circuit board, the second circuit board, the third circuit board, the radiation vibrator and the shield are all arranged inside the antenna housing, the first connector, the second connector and the third connector are all located outside the antenna housing, and the first cable, the second cable and the third cable are all passed through the antenna outlet hole.

[0073] Specifically, two module mounting holes are respectively arranged on the left and right sides of the front end side of the antenna housing 1, namely, the module mounting hole 104 for mounting and fixing module 1 and the module mounting hole 105 for mounting and fixing module 2. Two module outlet holes are respectively arranged on the front end side of the antenna housing 1, namely, the module outlet hole 107 for the outlet of the cable of module 1 and the module outlet hole 106 for the outlet of the cable of module 2.

[0074] Furthermore, the first cable A1 and the first connector A2 of the WIFI omnidirectional antenna 101, the third cable C1 and the third connector C2 of the GPS / BDS active antenna 102, and the second cable B1 and the third connector B2 of the 4G omnidirectional antenna 103 are all connected through the rear antenna outlet hole 109 of the antenna housing 1 and are electrically connected to the transceiver device. Figure 2 to Figure 5 As shown, Figure 2 is a schematic diagram of the front structure of the antenna housing in the embodiment, Figure 3 is a schematic diagram of the back structure of the antenna housing in the embodiment, Figure 4 is a schematic diagram of the side structure of the antenna housing in the embodiment, Figure 5 Schematic diagram of the internal structure of the antenna housing in the embodiment.

[0075] In the embodiment of the present application, the front side of the high-frequency double-sided copper-clad PCB board A is provided with a ground plate 201, a grounding copper-clad hole 202, a grounding soldering point 203, a feeding connection point 204, an impedance matcher 1 205, an impedance matcher 206, a radiation oscillator 1 207, a phase shifter 208, a phase shifter transmission line 209 and a radiation oscillator 2 210. The back side of the high-frequency double-sided copper-clad PCB board A is provided with a coupling ground plate 211 and a grounding copper-clad hole 202.

[0076] Among them, the ground plate 201 is connected to the coupling ground plate 211 through the ground copper hole 202, one end of the impedance matcher 1 205 is connected to the feeding connection 204, the other end of the impedance matcher 1 205 is connected to one end of the impedance matcher 2 206, one end of the radiation oscillator 1 207 is connected to one end of the impedance matcher 2 206, the other end of the radiation oscillator 1 207 is connected to one end of the phase shifter 208, one end of the radiation oscillator 2 210 is connected to one end of the phase shifter 208, and the radiation oscillator 1 207 and the radiation oscillator 2 210 are connected through the phase shifter transmission line 209. Specifically, Figure 6 to Figure 8 As shown, Figure 6 This is a schematic diagram of the front structure of the WIFI omnidirectional antenna circuit board in the embodiment. Figure 7 This is a schematic diagram of the back structure of the WIFI omnidirectional antenna circuit board in the embodiment. Figure 8 Schematic diagram of the structure of the phase shifter on the WIFI omnidirectional antenna circuit board in the embodiment.

[0077] In the embodiment of the present application, the front side of the high-frequency double-sided copper-clad PCB board B is provided with a ground plate 301, a grounding copper-clad hole 302, a grounding soldering point 303, a feeding connection point 304, a coupling vibrator 305, a transmission line 306, an impedance matcher 307, a phase shifter 308, a phase shifter transmission line 309 and a radiation vibrator 310. The back side of the high-frequency double-sided copper-clad PCB board B is provided with a coupling ground plate 311 and a grounding copper-clad hole 302.

[0078] Among them, the ground plate 301 is connected to the coupling ground plate 311 through the grounding copper hole 302, one end of the coupling oscillator 305 is connected to the feeding connection 304, the feeding connection 304 is connected to one end of the impedance matcher 307 through the transmission line 306, one end of the phase shifter 308 is connected to one end of the impedance matcher 307, the other end of the phase shifter 308 is connected to one end of the radiation oscillator three 310, and the impedance matcher 307 and the radiation oscillator three 310 are connected through the phase shifter transmission line 309. Figures 9 to 11 As shown, Fig. 9 This is a schematic diagram of the front structure of the 4G omnidirectional antenna circuit board in the embodiment. Fig.10 This is a schematic diagram of the back structure of the 4G omnidirectional antenna circuit board in the embodiment. Fig.11Schematic diagram of the structure of the phase shifter on the 4G omnidirectional antenna circuit board in the embodiment.

[0079] In the embodiment of the present application, the shield E is welded and fixed to the circuit on the front of the third circuit board C through the shield welding part 404, the cross section of the L-shaped radiation oscillator D is in a convex shape, the bottom of the L-shaped radiation oscillator D is welded and fixed to the back of the third circuit board C through the welding hole 403, and the radiation direction of the L-shaped radiation oscillator D is toward the top direction of the back of the third circuit board C, and the distance between the L-shaped radiation oscillator D and the back of the circuit board C is 5mm. Figure 12 to Figure 15 As shown, Fig.12 This is a schematic diagram of the front structure of the GPS / BDS active antenna circuit board in the embodiment, Fig.13 This is a schematic diagram of the back structure of the GPS / BDS active antenna circuit board in the embodiment, Fig.14 It is a structural schematic diagram of the L-shaped radiating vibrator of the GPS / BDS active antenna in the embodiment, Fig.15 FIG. 4 is a schematic diagram of the structure of a GPS / BDS active antenna shield in an embodiment.

[0080] Since the high-frequency double-sided copper-clad PCB board of the WIFI omnidirectional antenna is provided with a ground plate, a grounding welding point, a feeding connection point, an impedance matcher 1, an impedance matcher 2, a radiating vibrator 1, a phase shifter, a phase shifter transmission line, a radiating vibrator 2, a coupling ground plate and a grounding copper-sinking hole on the front and back sides, the high-frequency double-sided copper-clad PCB board of the 4G omnidirectional antenna is provided with a ground plate, a grounding welding point, a feeding connection point, a transmission line, an impedance matcher, a phase shifter, a phase shifter transmission line, a radiating vibrator, a coupling ground plate and a grounding copper-sinking hole on the front and back sides; by utilizing dielectric microstrip technology, phase shifter technology, broadband technology and coupled resonance technology, the radiating vibrator, the coupling vibrator, the microstrip transmission line, the impedance matcher, the phase shifter transmission line, the coupling ground plate and the microstrip transmission line at the grounding are designed into irregular shapes, and by changing The shape of the oscillator, the size and shape of the microstrip transmission line on the dielectric substrate, the phase shifter, the impedance matcher and the spacing of the transmission lines are used to obtain better electrical performance parameters of the antenna; the front and back of the GPS / BDS active antenna circuit board are provided with grounding welding points, feeding connections, active circuits, L-shaped radiation oscillator welding points and shield welding points. The L-shaped radiation oscillator can enhance the directivity of the antenna, and the shield covers the active circuit to reduce the interference of external clutter on the components; at the same time, the complex design of the impedance matching network is omitted to ensure its miniaturization, so that it can be used in transceiver equipment with limited size, and the antenna radiation area utilization rate is high and the anti-interference ability is strong. Therefore, the structure is relatively simple, the size is small, and it can provide better radiation performance indicators and can match the connection end in the transceiver equipment.

[0081] In the embodiment of the present application, the high-frequency double-sided copper-clad PCB board A of the WIFI omnidirectional antenna 101 has a length range of 95.3 mm to 102.5 mm, a width range of 14.6 mm to 15.8 mm, and a thickness range of 0.80 mm to 1.20 mm. The material of the high-frequency double-sided copper-clad PCB board A is F4BM-2 double-sided copper-clad board with a dielectric constant of 2.2. The length of the radiation oscillator 1 is 1 / 2λ0, and the length of the radiation oscillator 2 is 5 / 8λ0, where λ0 is the spatial free wavelength of the center frequency. The length range of impedance matcher 1 is 12.13mm~13.52mm, and the width range is 4.26mm~5.28mm. The length range of impedance matcher 2 is 3.54mm~4.92mm, and the width range is 1.13mm~2.24mm. The ground plate, impedance matcher 1, impedance matcher 2, radiation oscillator 1, phase shifter, radiation oscillator 2 and coupling ground plate are all printed on the front or back of the high-frequency double-sided copper-clad PCB board with microstrip lines.

[0082] In the embodiment of the present application, the high-frequency double-sided copper-clad PCB board B of the 4G omnidirectional antenna 102 has a length range of 83.5mm to 96.5mm, a width range of 14.6mm to 15.8mm, and a thickness range of 0.80mm to 1.20mm. The material of the high-frequency double-sided copper-clad PCB board is F4BM-2 double-sided copper-clad board with a dielectric constant of 2.2. The length of the coupling vibrator and the radiating vibrator three is 5 / 8λ0, where λ0 is the spatial free wavelength of the center frequency. The length range of the impedance matcher is 4.56mm to 6.68mm, and the width range is 4.52mm to 6.34mm. The ground plate, coupling vibrator, impedance matcher, phase shifter, radiating vibrator three and coupling ground plate are all printed on the front or back of the high-frequency double-sided copper-clad PCB board with microstrip lines.

[0083] Figure 8 The schematic diagram of the structure of the phase shifter on the WIFI omnidirectional antenna circuit board in the embodiment is as follows. In the high-frequency double-sided copper-clad PCB board A feed circuit of the WIFI omnidirectional antenna 101, the two ends of the phase shifter 208, the radiation vibrator 1 207 and the radiation vibrator 2 210 are connected in an integrated manner. The unfolded length of the phase shifter 208 is half a wavelength, and the phase shift amount of the phase shifter 208 is 180°, so that the vertical unit currents of the radiation vibrator 1 207 and the radiation vibrator 2 210 remain in phase, thereby enhancing the directivity of the antenna and improving the gain of the antenna. The phase shifter 208 adopts a spiral structure, the spiral diameter D1 of the phase shifter 208 ranges from 5.23 mm to 7.36 mm, the pitch S1 ranges from 4.36 mm to 5.34 mm, and the number of spiral turns of the phase shifter 208 is 4 turns.

[0084] Fig.11The schematic diagram of the structure of the phase shifter on the circuit board of the 4G omnidirectional antenna in the embodiment shows that in the high-frequency double-sided copper-clad PCB board B feed circuit of the 4G omnidirectional antenna 103, the two ends of the phase shifter 308, the impedance matcher 307 and the radiation vibrator three 310 are connected in an integrated manner, the unfolded length of the phase shifter 308 is half a wavelength, and the phase shift amount of the phase shifter 308 is 180°, so that the vertical unit currents of the coupling vibrator 305 and the radiation vibrator three 310 remain in phase, thereby enhancing the directivity of the antenna and improving the gain of the antenna. The phase shifter 308 adopts a spiral structure, the spiral diameter D2 of the phase shifter 308 ranges from 4.86mm to 6.54mm, the pitch S2 ranges from 2.35mm to 4.57mm, and the number of spiral turns of the phase shifter 308 is 4.

[0085] In this embodiment, the components of the GPS / BDS active antenna 102 are arranged according to the signal flow direction, starting from the input stage and ending at the output stage. The current of each unit is relatively concentrated, and the layout is centered on the amplifier device to shorten the connection of the high-frequency components, reduce their distributed parameters and mutual electromagnetic interference, and for adjustable components, components susceptible to interference cannot be too close to each other, and the input and output components should be as far away as possible. The components located at the edge of the circuit board should be more than 2 mm away from the edge of the circuit board; a symmetrical circuit is used to make the distributed parameters of the components consistent, and the two amplifier devices are placed vertically and far away to reduce mutual coupling. The components are arranged evenly, neatly, compactly, and with consistent density.

[0086] The bottom of the L-shaped radiation oscillator D is in a convex shape, and the bottom of the L-shaped radiation oscillator D is welded and fixed on the back of the circuit board through the welding hole 403, and the radiation direction of the L-shaped radiation oscillator is toward the top direction of the back of the circuit board, which can enhance the directivity of the antenna. The shield E is welded and fixed on the circuit on the front of the circuit board through the shield welding part 404, which can cover the active circuit on the circuit board and reduce the interference of external clutter on the components. Figure 14-15 shown.

[0087] In this embodiment, the length range of the GPS / BDS active antenna circuit board is 63.3mm~75.5mm, the width range is 13.23mm~15.35mm, the thickness range is 1.32mm~1.55mm, and the material used is PCB board with a dielectric constant of 4.3~4.7. The length range of the L-shaped radiator is 32.6mm~35.8mm, the width range is 6.32mm~9.23mm, the thickness range is 1.10mm~1.32mm, and the material used is tin-plated brass plate. The length range of the shield is 27.3mm~29.6mm, the width range is 9.65mm~11.54mm, the height range is 3.25mm~5.21mm, the thickness range is 0.32mm~0.63mm, and the material used is nickel silver.

[0088] It is worth mentioning that in the present embodiment, the length range of the antenna shell is 186mm~204mm, the width range is 145mm~163mm, the height range is 103mm~112mm, the outer diameter range of the module mounting holes of the two modules on the left and right sides of the front end of the antenna shell is 10.32mm~11.64mm, the outer diameter range of the module outlet holes of the two modules at the front end of the antenna shell is 8.25mm~9.63mm, the outer diameter range of the antenna outlet hole at the rear end of the antenna shell is 14.68mm~16.57mm, and the material used for the shell is UV-resistant ABS.

[0089] The combined antenna sample applied in the intelligent parking management system provided by the present application has been improved and perfected for many times, and finally verified by instrument detection, involving WIFI frequency band (2400MHz~2500MHz), 4G (fourth generation mobile communication system) frequency band (2500MHz~2700MHz) and GPS / BDS frequency band (1559MHz~1602MHz). In the matching test of antenna and transceiver equipment, the standing wave ratio is below 1.50. In the test of the signal strength of GPS / BDS active antenna, the signal strength coefficient reaches about 47~48, such as Figure 16 to Figure 19 As shown, Fig.16 It is the standing wave diagram actually measured by the WIFI omnidirectional antenna in the embodiment, Fig.17 It is the standing wave diagram measured by the 4G omnidirectional antenna in the embodiment, Fig.18 It is the standing wave diagram actually measured by the GPS / BDS active antenna in the embodiment, Fig.19 This is a signal strength test diagram actually measured by the GPS / BDS active antenna in the embodiment.

[0090] Among them, in the test of antenna radiation pattern, the gain of 2400MHz~2500MHz and 2500MHz~2700MHz reached 5.5dBi, and the non-circularity of the horizontal plane radiation pattern was within ±1dB. Figure 20 to Figure 25 As shown, Fig. 20 is the directional diagram of the WIFI omnidirectional antenna tested at 2400MHz in the embodiment, Fig.21 It is the directional diagram of the WIFI omnidirectional antenna tested at 2450MHz in the embodiment, Fig. 22 This is the directional diagram of the WIFI omnidirectional antenna tested at 2483MHz in the embodiment. Fig.23 is the directional diagram of the 4G omnidirectional antenna tested at 2500MHz in the embodiment, Fig.24 is the directional diagram of the 4G omnidirectional antenna tested at 2600 MHz in the embodiment, Fig.25 It is the directional diagram of the 4G omnidirectional antenna tested at 2700 MHz in the embodiment.

[0091] The combined antenna provided in the present application is applied to the intelligent parking management system. The antenna shell is beautiful, the structure is firm, the curvature and streamline have a strong three-dimensional sense, the installation and fixing holes are consistent with the connection with the transceiver equipment, the antenna is small in size, light in weight, thin in thickness, easy to install, low in cost, simple to produce, easy to mass produce, the antenna performance indicators are excellent, can match the connection end in the transceiver equipment and can provide good radiation performance parameters.

[0092] Another object of the embodiments of the present application is to provide an intelligent parking management system, which is equipped with the above-mentioned combined antenna.

[0093] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A combined antenna, characterized in that: Including antenna housing, WIFI omnidirectional antenna, GPS / BDS active antenna and 4G omnidirectional antenna; among them, The shell wall of the antenna housing is provided with an antenna outlet hole and a mounting structure, and the mounting structure is used to connect a transceiver device; The WIFI omnidirectional antenna includes a first circuit board, a first cable and a first connector; the inner conductor at one end of the first cable is electrically connected to the feed connection of the first circuit board, the outer conductor is electrically connected to the ground connection of the first circuit board, and the other end of the first cable is electrically connected to the first connector; The 4G omnidirectional antenna includes a second circuit board, a second cable and a second connector; the inner conductor of one end of the second cable is electrically connected to the feed connection of the second circuit board, the outer conductor is electrically connected to the ground connection of the second circuit board, and the other end of the second cable is electrically connected to the second connector; The GPS / BDS active antenna comprises a third circuit board, a third cable and a third connector; the inner conductor at one end of the third cable is electrically connected to the feed connection of the third circuit board, the outer conductor is electrically connected to the ground connection of the third circuit board, and the other end of the third cable is electrically connected to the third connector; The first circuit board, the second circuit board, and the third circuit board are all arranged inside the antenna housing, the first connector, the second connector, and the third connector are all located outside the antenna housing, and the first cable, the second cable, and the third cable are all inserted into the antenna outlet hole; The first circuit board includes a ground plate, an impedance matcher 1, an impedance matcher 2, a radiation vibrator 1, a radiation vibrator 2, a phase shifter and a phase shifter transmission line arranged on the front side thereof, and a coupling ground plate arranged on the back side thereof; The ground plate and the coupling ground plate are electrically connected through the grounding copper plate of the first circuit board; the impedance matcher 1 is electrically connected between the feed connection and the impedance matcher 2, the radiation vibrator 1 is electrically connected between the impedance matcher 2 and the phase shifter, the radiation vibrator 2 is electrically connected to the phase shifter, and the radiation vibrator 1 and the radiation vibrator 2 are electrically connected through the phase shifter transmission line; The second circuit board includes a ground plate, a coupling vibrator, an impedance matcher, a phase shifter, a phase shifter transmission line and a radiation vibrator arranged on the front side thereof, and a coupling ground plate arranged on the back side thereof; The grounding plate and the coupling grounding plate are electrically connected through the grounding copper holes on the second circuit board; the coupling vibrator is electrically connected between the feeding connection and the impedance matcher, the phase shifter is electrically connected between the impedance matcher and the radiating vibrator three, and the impedance matcher and the radiating vibrator three are electrically connected through the phase shifter transmission line.

2. The combined antenna according to claim 1, characterized in that: The GPS / BDS active antenna further includes a radiation vibrator and a shield, wherein the radiation vibrator and the shield are both electrically connected to the third circuit board, and the radiation vibrator and the shield are both arranged inside the antenna housing.

3. The combined antenna according to claim 2, characterized in that: The radiation vibrator is L-shaped, and the cross section of the radiation vibrator is convex.

4. The combined antenna according to claim 1, characterized in that: The antenna housing comprises a first half shell and a second half shell, and the first half shell and the second half shell are snap-fitted and docked.

5. The combined antenna according to claim 1, characterized in that: The antenna shell is columnar, the antenna wire hole is opened on the end side of the antenna shell, and the mounting structure is arranged on the peripheral side of the antenna shell.

6. The combined antenna according to claim 5, characterized in that: The shell wall of the antenna shell is also provided with a module installation hole and a module wire passing hole; The module mounting hole is used to mount a communication module of a transceiver device; The module cable holes are used for routing cables of the communication modules of the transceiver equipment.

7. The combined antenna according to claim 1, characterized in that: The antenna shell is flat, and the cross section of the antenna shell is elliptical.

8. An intelligent parking management system, characterized in that: The invention comprises a transceiver device and a combined antenna as claimed in any one of claims 1 to 7.

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