Combined antenna and terminal device

Abstract

The application relates to the technical field of antennas, and discloses a combined antenna and a terminal device. The combined antenna comprises a first antenna, a second antenna, a first ground plate and a second ground plate. The first ground plate is arranged between the first antenna and the second antenna, and the second antenna is arranged between the first ground plate and the second ground plate. The frequency range of the first antenna is a navigation antenna frequency band. The frequency range of the second antenna is a communication antenna frequency band. The first antenna comprises a plurality of antenna components, at least one of which is a shared antenna component with the second antenna. Compared with the prior art, the combined antenna effectively reduces the height, volume and assembly space of the whole combined antenna on the basis of reducing the interference between the first antenna and the second antenna, and is beneficial to the miniaturization development of the terminal device.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a combined antenna and terminal device. Background Technology

[0002] In terminal devices, such as drones, commonly used antennas include GNSS antennas and communication antennas (such as 4G / Bluetooth / Wi-Fi). To achieve the corresponding functions of GNSS and communication antennas, avoid mutual interference, and ensure that GNSS and communication antennas reach a preset height, they are often set up independently. That is, the GNSS antenna, 4G antenna, and Bluetooth / Wi-Fi antenna need to be placed in separate locations and spaced far apart to avoid mutual interference between the multiple antennas. However, this requires a large space to assemble multiple antennas, increasing the assembly space and hindering the miniaturization of terminal devices. Summary of the Invention

[0003] In order to solve the technical problem that various antennas occupy a large assembly space in existing terminal equipment, the main purpose of this application is to provide a combined antenna and terminal equipment that can occupy a small volume.

[0004] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0005] According to one aspect of this application, a combined antenna is provided, comprising: a first antenna, a second antenna, a first ground plane, and a second ground plane.

[0006] The first ground plane is disposed between the first antenna and the second antenna, and the second antenna is disposed between the first ground plane and the second ground plane;

[0007] The frequency range of the first antenna is the navigation antenna frequency band;

[0008] The frequency range of the second antenna is the same as that of the communication antenna.

[0009] The first antenna includes a plurality of antenna components, wherein at least one antenna component is a shared antenna component with the second antenna.

[0010] According to one embodiment of this application, the first antenna is a GNSS antenna, which is two sets of four-arm spiral antennas, one set of four-arm spiral antennas is a first antenna assembly, and the other set of four-arm spiral antennas is a second antenna assembly. The first antenna assembly is a shared antenna assembly, and the second antenna assembly is a non-shared antenna assembly. The second antenna is a 4G antenna.

[0011] According to one embodiment of this application, the first ground plane includes:

[0012] A first connecting portion, which is electrically connected to the first antenna assembly;

[0013] The second connecting part is electrically connected to the second antenna;

[0014] The first connecting portion and the second connecting portion within the first grounding plate are electrically connected.

[0015] According to one embodiment of this application, the first antenna includes a first feed network, which is a feed network with four first ports of equal amplitude and phases successively differing by 90 degrees.

[0016] The second antenna assembly includes four first feed terminals, each corresponding to one of the first ports, and the first feed terminals are electrically connected to the first ports.

[0017] According to one embodiment of this application, the second antenna includes a first oscillator portion and a first dielectric plate, wherein the first oscillator portion is disposed on the first dielectric plate;

[0018] One end of the first oscillator is electrically connected to the second connecting part, and the other end of the first oscillator is connected to the second grounding plate.

[0019] According to one embodiment of this application, the second antenna includes a matching network, the matching network includes a second port, the first oscillator includes a second feed terminal, and the second feed terminal is electrically connected to the second port.

[0020] According to one embodiment of this application, it further includes a third antenna, the frequency band of which is the Bluetooth / WiFi antenna frequency band;

[0021] The third antenna includes a second vibrator and a second dielectric substrate, wherein the second vibrator is disposed on the second dielectric substrate;

[0022] The two ends of the second dielectric plate are respectively connected to the first ground plane and the second ground plane, and the first dielectric plate and the second dielectric plate are spaced apart by a set distance.

[0023] According to one embodiment of this application, the third antenna shares a second ground plane with the second antenna.

[0024] According to one embodiment of this application, the frequency band of the shared antenna assembly is within the frequency band of the second antenna.

[0025] According to another aspect of this application, a terminal device is provided, including the aforementioned combined antenna.

[0026] As can be seen from the above technical solution, the advantages and positive effects of the combined antenna and terminal equipment of this application are as follows:

[0027] On the one hand, by placing the first ground plane between the first antenna and the second antenna, the first ground plane serves as the ground plane for the first antenna, and the second antenna is placed between the first ground plane and the second ground plane, with the second ground plane serving as the ground plane for the second antenna. This physically isolates the first antenna and the second antenna, reducing electromagnetic interference between them. On the other hand, the first antenna includes multiple antenna components, at least one of which is a shared antenna component with the second antenna. This increases the height of the second antenna by using the shared antenna component, thus meeting the overall antenna height requirements within the communication antenna frequency band. Consequently, the overall height of the combined antenna is effectively reduced, the volume is reduced, and the assembly space is decreased, which is beneficial for the miniaturization of terminal devices. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of an overall structure of a combined antenna provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the overall structure of the first antenna in a combined antenna provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the overall structure of the second antenna in a combined antenna provided in an embodiment of this application;

[0033] Figure 4 A three-dimensional structural schematic diagram of a combined antenna provided in an embodiment of this application;

[0034] Figure 5 This is a top view of the first ground plane structure in a combined antenna provided in an embodiment of this application;

[0035] Figure 6This is a schematic diagram of another overall structure of a combined antenna provided in an embodiment of this application;

[0036] Figure 7 This is another three-dimensional structural schematic diagram of a combined antenna provided in an embodiment of this application;

[0037] Figure 8 This is another three-dimensional structural schematic diagram of a combined antenna provided in an embodiment of this application;

[0038] Figure 9 This is a top view schematic diagram of another structure of the first ground plane in a combined antenna provided in an embodiment of this application;

[0039] Figure 10 This is a schematic diagram of a structure connected in a combined antenna according to an embodiment of this application;

[0040] Figure 11 This is a schematic diagram of another connection structure in a combined antenna provided in an embodiment of this application.

[0041] in:

[0042] 10. First antenna;

[0043] 11. Antenna assembly; 111. First antenna assembly; 112. Second antenna assembly;

[0044] 12. First feed terminal;

[0045] 20. The second line;

[0046] 21. Second feed terminal; 22. First oscillator section; 23. First dielectric substrate; 24. Matching network; 241. Second port;

[0047] 30. First contact floor;

[0048] 31. First surface; 32. Second surface; 33. First connecting portion; 34. Second connecting portion; 35. First power supply network; 351. First port;

[0049] 40. Second landing plate;

[0050] 50. Third antenna; 51. Second vibrator; 511. Third feed terminal; 52. Second dielectric substrate. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In terminal devices, such as drones, commonly used antennas include GNSS antennas and communication antennas (such as 4G / Bluetooth / Wi-Fi). To achieve the corresponding functions of the GNSS and communication antennas, avoid mutual interference, and ensure that the GNSS and communication antennas reach a preset height, they are often set up independently. This means that the GNSS, 4G, and Bluetooth / Wi-Fi antennas need to be placed in separate locations with a significant distance between them to avoid mutual interference. However, this requires a large space to assemble multiple antennas, increasing the assembly space and hindering the miniaturization of terminal devices. To address the technical problem of large assembly space occupied by various antennas in existing terminal devices, according to one aspect of this application, a combined antenna is provided, comprising: a first antenna 10, a second antenna 20, a first ground plane 30, and a second ground plane 40.

[0053] The first ground plane 30 is disposed between the first antenna 10 and the second antenna 20, and the second antenna 20 is disposed between the first ground plane 30 and the second ground plane 40;

[0054] The frequency range of the first antenna 10 is the navigation antenna frequency band;

[0055] The frequency range of the second antenna 20 is the frequency band of the communication antenna;

[0056] The first antenna 10 includes a plurality of antenna components 11, wherein at least one antenna component 11 is a shared antenna component 11 with the second antenna 20.

[0057] On the one hand, by placing the first ground plane between the first antenna and the second antenna, the first ground plane serves as the ground plane for the first antenna, and the second antenna is placed between the first ground plane and the second ground plane, with the second ground plane serving as the ground plane for the second antenna. This physically isolates the first antenna and the second antenna, reducing electromagnetic interference between them. On the other hand, the first antenna includes multiple antenna components, at least one of which is a shared antenna component with the second antenna. This increases the height of the second antenna by using the shared antenna component, thus meeting the overall antenna height requirements within the communication antenna frequency band. Consequently, the overall height of the combined antenna is effectively reduced, the volume is reduced, and the assembly space is decreased, which is beneficial for the miniaturization of terminal devices.

[0058] As an example, the first grounding plate 30 includes a first surface 31 and a second surface 32, wherein the first surface 31 and the second surface 32 are two planes opposite to the first grounding plate 30;

[0059] The frequency range of the first antenna 10 is the navigation antenna frequency band;

[0060] The frequency range of the second antenna 20 is the frequency band of the communication antenna;

[0061] The first antenna 10 is disposed on the first surface 31, the second ground plane 40 faces the second surface 32, and the second antenna 20 is disposed between the second surface 32 and the second ground plane 40 in the first ground plane 30;

[0062] The first antenna 10 includes a plurality of antenna components 11, wherein at least one antenna component 11 is a shared antenna component 11 with the second antenna 20.

[0063] refer to Figures 1-3As shown, on the one hand, by placing the first antenna 10 on the first surface 31 of the first ground plane 30 and placing the second antenna 20 between the second surface 32 of the first ground plane 30 and the second ground plane 40, the first ground plane 30 physically isolates the first antenna 10 and the second antenna 20, reducing electromagnetic interference between the first antenna 10 and the second antenna 20. On the other hand, the first antenna 10 includes multiple antenna components 11, wherein at least one of the antenna components 11 is a shared antenna component 11 with the second antenna 20. Thus, by increasing the height of the second antenna 20 through the shared antenna component 11, the overall height of the second antenna 20 is met, thereby effectively reducing the overall height of the combined antenna, reducing its volume, and reducing assembly space, which is beneficial to the miniaturization of terminal equipment.

[0064] As an example, the frequency band of the shared antenna assembly 11 is within the frequency band of the second antenna 20. The first antenna 10 is the operating frequency band of the navigation antenna. As an example, the first antenna 10 includes the GNSS satellite positioning system, specifically the positioning frequency bands of the four major satellite positioning systems: BeiDou, GPS, GLONASS, and Galileo. The second antenna 20 is the operating frequency band of the communication antenna. As an example, it includes the positioning frequency band of the satellite positioning system and two segmented frequency bands: 2.4GHz and 5.8GHz.

[0065] In actual use, the required height of a communication antenna, while meeting the requirements of the corresponding frequency band, can be the sum of the height of the second antenna 20 and the height of the antenna assembly 11 shared by the first antenna 10, so as to meet the usage requirements of the second antenna 20 to reach the preset frequency band and reduce the overall height of the combined antenna.

[0066] As an example, the frequency band of the shared antenna assembly 11 is in the low frequency band of the second antenna 20, so that the shared antenna assembly 11 can function in both the frequency band of the second antenna 20 and the frequency band of the first antenna 10.

[0067] According to one embodiment of this application, the first antenna 10 is a GNSS antenna, which is two sets of four-arm spiral antennas, one set of four-arm spiral antennas is a first antenna assembly 111, and the other set of four-arm spiral antennas is a second antenna assembly 112. The first antenna assembly 111 is a shared antenna assembly 11, the second antenna assembly 112 is a non-shared antenna assembly 11, and the second antenna 20 is a 4G antenna.

[0068] refer to Figure 4As shown, as an example, one of the two antenna components 11 is a shared antenna component 11, namely the first antenna component 111. The first antenna component 111 and the second antenna 20 together form a 4G antenna, which meets the height requirements of the communication frequency band of the 4G antenna and reduces space.

[0069] On the other hand, the width and height of the four-arm helical antennas within the antenna assembly 11 can be controlled to meet usage requirements, improve flexibility during use, and enable each antenna assembly 11 to form a symmetrical structure, thereby widening the antenna bandwidth and increasing gain bandwidth.

[0070] Since the four-arm spiral antenna of the first antenna assembly 111 is a shared antenna assembly 11, it can effectively increase the bandwidth of the second antenna 20 and further improve the gain bandwidth.

[0071] The second antenna 20 is a planar antenna, which can be easily assembled and installed with the combination. While realizing the function of the 4G antenna, the bandwidth of the second antenna 20 is increased by the shared antenna component 11 without affecting the navigation and positioning effect of the first antenna 10.

[0072] According to one embodiment of this application, the first ground plane 30 includes:

[0073] The first connecting part 33 is electrically connected to the first antenna assembly 111;

[0074] The second connecting part 34, the second antenna 20 is electrically connected to the second connecting part;

[0075] The first connecting portion 33 and the second connecting portion 34 within the first grounding plate 30 are electrically connected.

[0076] As an example, a plurality of first connection portions 33 are provided at intervals on the first ground plane 30; the first feed terminal 12 corresponds one-to-one with the first connection portions 33, so that the first antenna 10 is electrically connected to the first ground plane 30.

[0077] After the second antenna 20 is electrically connected to the second connection part 34, the first antenna assembly 111 is used as a component of the 4G antenna to operate in the communication antenna frequency band, thereby reducing the overall space.

[0078] refer to Figure 5 As shown, the first connecting portion 33 is connected to the bottom end of each of the spiral antennas in each of the first antenna assemblies 111. The first connecting portions 33 are evenly distributed along the circumference of the first ground plane 30. The second connecting portion 34 is used to electrically connect the second antenna 20 to the first ground plane 30.

[0079] According to one embodiment of this application, the first antenna 10 includes a first feed network 35, which is a feed network with four first ports 351 of equal amplitude and phases that are 90 degrees apart.

[0080] The second antenna assembly 112 includes four first feed terminals 12, each of which corresponds to one of the first ports 351 and is electrically connected to the first ports 351.

[0081] refer to Figure 10-11 As shown in the figure, as an example, a first power supply network 35 with a 90-degree phase difference is provided on the first ground plane 30, and the first connection part 33 is provided on the first power supply network 35.

[0082] The spiral antenna in the first antenna assembly 111 is electrically connected to the second connecting part 34 through the first connecting part 33, thereby enabling the spiral antenna in the first antenna assembly 111 and the second antenna 20 to form a 4G antenna, and enabling the second antenna 20 to collect signals in the preset frequency band of the 4G antenna.

[0083] refer to Figure 10 As shown, as an example, according to one embodiment of this application, the first surface 31 of the first ground plane 30 includes a first power supply network 35 with a 90-degree phase difference, the first power supply network 35 includes a plurality of first ports 351, and a plurality of first connection portions 33 are sequentially connected to the plurality of first ports 351.

[0084] Furthermore, the first ground plate 30 and the second ground plate 40 are circular sheet structures, and the first port 351 and its corresponding first connecting part 33 are disposed in the edge area of ​​the first ground plate 30 to further reduce the volume.

[0085] According to one embodiment of this application, the second antenna 20 includes a first oscillator portion 22 and a first dielectric plate 23, wherein the first oscillator portion 22 is disposed on the first dielectric plate 23;

[0086] One end of the first oscillator 22 is electrically connected to the second connecting part 34, and the other end of the first oscillator 22 is connected to the second grounding plate 40.

[0087] As an example, the second grounding plate 40 is made to be the grounding plate of the second antenna and is grounded.

[0088] refer to Figure 10 and Figure 11As shown, according to one embodiment of this application, the second antenna 20 includes a matching network 24, the matching network 24 includes a second port 241, and the first oscillator portion 22 includes a second feed terminal 21, the second feed terminal 21 being electrically connected to the second port 241. As an example, at least one second feed terminal 21 is disposed at the bottom end of the first oscillator portion 22 and is used for electrical connection to the second ground plane 40.

[0089] The first dielectric substrate 23 is a PCB board, and the first vibrator part 22 is a sheet of metal material. The top of the first vibrator part 22 is connected to the second connecting part 34 so that the second antenna is electrically connected to the first ground plane 30. Through the electrical connection between the first ground plane 30 and the first antenna assembly 111, the first antenna assembly 111 can become part of the 4G antenna and perform the function and effect of the 4G antenna, thereby reducing the overall size of the combined antenna.

[0090] According to one embodiment of this application, a third antenna 50 is further included, wherein the frequency band of the third antenna 50 is the Bluetooth / WiFi antenna frequency band;

[0091] The third antenna 50 includes a second vibrator portion 51 and a second dielectric substrate 52, wherein the second vibrator portion 51 is disposed on the second dielectric substrate 52;

[0092] The two ends of the second medium plate 52 are respectively connected to the first ground plate 30 and the second ground plate 40, and the first medium plate 23 and the second medium plate 52 are spaced apart by a set distance;

[0093] The second oscillator 51 includes a third power supply terminal 511, which is connected to the second ground plane 40.

[0094] Preferably, the third antenna 50 and the second antenna 20 share the second ground plane 40, so that the second ground plane 40 is the ground plane of the third antenna 50 and the second antenna 20.

[0095] refer to Figures 6-9As shown, the second ground plane 40 has a circular structure, and the third antenna 50 is a Bluetooth / WiFi antenna band. The third antenna 50 and the second antenna 20 are spaced apart. Preferably, the third antenna 50 and the second antenna 20 are symmetrically distributed on the second ground plane 40 and the first ground plane 30, including the first dielectric substrate 23 and the second dielectric substrate 52 being distributed opposite each other on both sides of an extended diameter line of the second ground plane 40, and the spacing between the first dielectric substrate 23 and the second dielectric substrate 52 is the maximum spacing distance, so as to reduce the interference between the first antenna 10, the second antenna 20 and the third antenna 50.

[0096] refer to Figure 9 As shown, the third antenna 50 and the second antenna 20 are symmetrically distributed on the second ground plane 40 and the first ground plane 30. The first ground plane 30 and the second ground plane 40 are circular plate structures, and the first ground plane 30 and the second ground plane 40 are two parallel sections located in the same cylinder. The bottom end of the first dielectric plate 23 extends along a diameter direction of the second ground plane 40, and the bottom end of the second dielectric plate 52 extends along a chord direction of the second ground plane 40. The extension direction of the first dielectric plate 23 is perpendicular to the extension direction of the second dielectric plate 52.

[0097] This allows the two sets of four-arm spiral antennas within the first antenna 10 to form a symmetrical gain pattern, based on the spacing between the first vibrator 22 and the second vibrator 51, thereby reducing the interference between the second antenna 20 and the second antenna 21, and improving the gain bandwidth of the entire combined antenna.

[0098] refer to Figure 11 As shown, the second ground plane 40 is provided with a matching network 41, and the second feed terminal 21 at the bottom of the second antenna 20 is connected to the second port 411. The signal of the second antenna 20 is output through the matching network 41. The second ground plane 40 is provided with the third feed network (not shown in the figure), and the bottom of the second vibrator part 51 in the third antenna 50 is provided with the third feed terminal 511, so that the third antenna 50 outputs the signal through the third feed network (not shown in the figure).

[0099] In general, the current application of GNSS antennas and communication antennas (such as 4G / Bluetooth / Wi-Fi) in drones is done independently. Independent GNSS antennas, independent 4G antennas, and independent Bluetooth / Wi-Fi antennas require separate locations for proper placement, which not only increases the design complexity of the overall drone structure but also increases the possibility of interference between the multiple systems.

[0100] This solution integrates the GNSS and communication antennas, significantly reducing structural complexity and avoiding interference between multiple systems. The combined antenna in this solution provides coverage for both the GNSS and communication antennas, with the two antennas positioned vertically. This simplifies the overall structure and reduces antenna height by over 30%. The GNSS and communication antennas share a common ground plane, electrically connecting the ground plane of the GNSS antenna to one end of the communication antenna. This combined design achieves a height comparable to a single communication antenna, meaning that the functionality of both GNSS and communication antennas can be realized within the size of a single communication antenna. Furthermore, to ensure the broadband performance of the communication antenna, a matching circuit is added between the 4G antenna feed port and the antenna element. Replacing two or three separate antennas with a single combined antenna structure saves costs, significantly reduces the difficulty of system design, and avoids system interference that may result from multiple antennas.

[0101] The combined antenna in this application includes:

[0102] (1) A GNSS antenna located in the upper half region (equivalent to the upper surface of the first ground plane 30), a communication antenna located in the lower half region (equivalent to the area between the lower surface of the first ground plane 30 and the second ground plane 40), and a matching network for the communication antenna (equivalent to the first feed network 35, the matching network 41, and the third feed network (not shown in the figure)); the matching network is also the matching circuit, and inductor and capacitor components are provided in the matching network.

[0103] (2) The GNSS antenna (equivalent to the first antenna 10) is a four-arm spiral antenna, which includes: one or two sets of four-arm spiral arms and a feed network with equal amplitude and phase difference of 90 degrees.

[0104] (3) The communication antenna can be a 4G antenna (equivalent to the second antenna 20), or it can contain both a 4G antenna and a Bluetooth / Wi-Fi antenna (equivalent to the third antenna 50).

[0105] (4) The 4G antenna includes a matching circuit and is located between the feed terminal of the 4G antenna and the antenna vibrator. The end of the 4G antenna (equivalent to the second feed terminal 21) is electrically connected to the ground plane of the GNSS antenna (equivalent to the second ground plane 40). In this way, the GNSS antenna also becomes part of the 4G antenna. After sharing, the height is reduced by about 50% compared to the separate 4G antenna plus the GNSS antenna.

[0106] As an example, refer to Figures 1-5 As shown, the GNSS antenna + 4G antenna combination includes:

[0107] The GNSS antenna adopts a four-arm spiral antenna form. In this embodiment, it includes: two sets of four-arm spirals (which can realize dual-frequency or broadband) and a feed network with equal amplitude and phase difference of 90 degrees.

[0108] A 4G antenna includes: a matching circuit (inductor and capacitor components) and an antenna element (the end of which is connected to the ground plane of the GNSS antenna feed network).

[0109] The end of the 4G antenna vibrator is connected to the GNSS antenna ground plane, so that the GNSS antenna also becomes part of the 4G antenna. After sharing, the overall height of the combined antenna is reduced by about 50% compared to the height of a separate 4G antenna and GNSS antenna, and compared to existing technologies.

[0110] refer to Figures 6-9 As shown, as an example, in another embodiment, a combination of GNSS antenna + 4G antenna + Bluetooth / Wi-Fi antenna is used. The difference between the above embodiment and this embodiment is that a Bluetooth / Wi-Fi antenna is added next to the 4G antenna.

[0111] According to another aspect of this application, a terminal device is provided, including the aforementioned combined antenna.

[0112] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0113] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A combined antenna, characterized in that, include: The first antenna (10), the second antenna (20), the first ground plane (30), and the second ground plane (40) The first antenna (10) includes multiple antenna components (11), of which at least one antenna component (11) is a shared antenna component (11) with the second antenna (20); wherein the first antenna (10) is a GNSS antenna, the GNSS antenna is two sets of four-arm spiral antennas, one set of four-arm spiral antennas is the first antenna component (111), the other set of four-arm spiral antennas is the second antenna component (112), the first antenna component (111) is a shared antenna component (11), the second antenna component (112) is a non-shared antenna component (11), and the second antenna (20) is a 4G antenna; the frequency range of the first antenna (10) is the navigation antenna frequency band; the frequency range of the second antenna (20) is the communication antenna frequency band; The first ground plane (30) is disposed between the first antenna (10) and the second antenna (20), and the second antenna (20) is disposed between the first ground plane (30) and the second ground plane (40); the first ground plane (30) includes a first connecting part (33) and a second connecting part (34); the first connecting part (33) is electrically connected to the first antenna assembly (111); the second antenna (20) is electrically connected to the second connecting part (34); the first connecting part (33) and the second connecting part (34) within the first ground plane (30) are electrically connected.

2. The combined antenna as described in claim 1, characterized in that, The first antenna (10) includes a first feed network (35), which is a feed network of four first ports (351) with equal amplitude and phases that are 90 degrees apart. The second antenna assembly (112) includes four first feed terminals (12), each of which corresponds to one of the first ports (351), and the first feed terminals (12) are electrically connected to the first ports (351).

3. The combined antenna as described in claim 1, characterized in that, The second antenna (20) includes a first vibrator (22) and a first dielectric substrate (23), wherein the first vibrator (22) is disposed on the first dielectric substrate (23); One end of the first oscillator (22) is electrically connected to the second connecting part (34), and the other end of the first oscillator (22) is connected to the second grounding plate (40).

4. The combined antenna as described in claim 3, characterized in that, The second antenna (20) includes a matching network (24), the matching network (24) includes a second port (241), the first vibrator (22) includes a second feed terminal (21), and the second feed terminal (21) is electrically connected to the second port (241).

5. The combined antenna as described in claim 3, characterized in that, It also includes a third antenna (50), the frequency band of which is the Bluetooth / WiFi antenna band; The third antenna (50) includes a second vibrator (51) and a second dielectric substrate (52), wherein the second vibrator (51) is disposed on the second dielectric substrate (52); The two ends of the second medium plate (52) are respectively connected to the first ground plate (30) and the second ground plate (40), and the first medium plate (23) and the second medium plate (52) are spaced apart by a set distance.

6. The combined antenna as described in claim 5, characterized in that, The third antenna (50) shares the second ground plane (40) with the second antenna (20).

7. The combined antenna as described in claim 1, characterized in that, The frequency band of the shared antenna assembly (11) is within the frequency band of the second antenna (20).

8. A terminal device, characterized in that, Includes the combined antenna as described in any one of claims 1-7.

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