A broadband satellite antenna and satellite communication device

Abstract

The application provides a broadband satellite antenna and a satellite communication device, and relates to the technical field of antennas.The broadband satellite antenna comprises a metal base plate, a first satellite antenna and a navigation satellite antenna which are sequentially and layerwisely arranged in a first region on the top surface of the metal base plate, and a second satellite antenna which is arranged in a second region on the top surface of the metal base plate; the first satellite antenna and the second satellite antenna are high-frequency-band satellite antennas and low-frequency-band satellite antennas of a non-ground network respectively; the bottom surface of the metal base plate is provided with a first antenna interface, a second antenna interface and a third antenna interface; a first connecting terminal of the first satellite antenna, a second connecting terminal of the navigation satellite antenna and a third connecting terminal of the second satellite antenna are connected with the first antenna interface, the second antenna interface and the third antenna interface respectively.The broadband satellite antenna has a wide frequency coverage range and can meet the requirements of the Beihang platform on antennas.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more specifically, to a broadband satellite antenna and satellite communication equipment. Background Technology

[0002] In the field of IoT communication, Beihang University's platform module is mainly used to provide reliable global wireless network coverage and connectivity for remote areas that cannot be covered by cellular networks, such as maritime, transportation, heavy equipment, agriculture, mining, and oil and gas monitoring scenarios. During operation, this module imposes a series of stringent requirements on the satellite antenna it works with.

[0003] However, the existing satellite antennas have a narrow bandwidth, which cannot meet the Beihang platform's requirements for broadband antennas. This will affect the quality of satellite signal reception and transmission, especially at low elevation angles, where the signal is prone to attenuation, resulting in poor communication performance and making it difficult to guarantee stable communication and accurate positioning in complex environments. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing a broadband satellite antenna and satellite communication equipment to solve the problems existing in the prior art.

[0005] The technical solution adopted in the embodiments of this application is as follows: In a first aspect, embodiments of this application provide a broadband satellite antenna, comprising: a metal base plate, a first satellite antenna and a navigation satellite antenna sequentially stacked in a first region on the top surface of the metal base plate, and a second satellite antenna disposed in a second region on the top surface of the metal base plate; the first satellite antenna and the second satellite antenna are respectively a high-frequency band satellite antenna and a low-frequency band satellite antenna for a non-terrestrial network; The bottom surface of the metal base plate has: a first antenna interface, a second antenna interface, and a third antenna interface; the first connection terminal of the first satellite antenna, the second connection terminal of the navigation satellite antenna, and the third connection terminal of the second satellite antenna are respectively connected to the first antenna interface, the second antenna interface, and the third antenna interface.

[0006] In one embodiment, the first satellite antenna includes: a first substrate and a first reflector, wherein the bottom surface of the first substrate is fixed to the first region on the top surface of the metal base plate, the first reflector is disposed in the central region on the top surface of the first substrate, and the first reflector is provided with the first connection terminal. The navigation satellite antenna includes a second substrate and a second reflector, wherein the bottom surface of the second substrate is fixed in the central area of ​​the first reflector, the second reflector is disposed in the central area of ​​the top surface of the second substrate, and the second reflector is provided with the second connection terminal.

[0007] In one embodiment, both the first substrate and the second substrate are substrates made of ceramic material.

[0008] In one embodiment, the second satellite antenna includes a third substrate and a third reflector, wherein the bottom surface of the third substrate is fixed to the second region on the top surface of the metal base plate, the third reflector is disposed in the central region on the top surface of the third substrate, and the third reflector is provided with the third connection terminal.

[0009] In one embodiment, the edge region of the third substrate is provided with a plurality of metal vias.

[0010] In one embodiment, the third substrate is a substrate made of thermoplastic material.

[0011] In one embodiment, a first power supply unit is further provided on the bottom surface of the metal base plate; The input terminal of the first power supply unit is connected to the first coupling point corresponding to the first connection terminal on the bottom surface of the metal base plate, the output terminal of the first power supply unit is connected to the first antenna interface, and the second antenna interface is connected to the second coupling point corresponding to the second connection terminal on the bottom surface of the metal base plate.

[0012] In one embodiment, a second feeding unit is further provided on the bottom surface of the metal base plate; wherein, the input end of the second feeding unit is connected to the third coupling point corresponding to the third connection terminal on the bottom surface of the metal base plate, and the output end of the second feeding unit is connected to the third antenna interface.

[0013] In one embodiment, the metal base plate includes: a fourth substrate, and a metal layer covering the top and bottom surfaces of the fourth substrate.

[0014] Secondly, embodiments of this application provide a satellite communication device, including: a satellite communication module and a broadband satellite antenna as described in any of the above embodiments; The satellite communication module connects to the first antenna interface, the second antenna interface, and the third antenna interface of the broadband satellite antenna.

[0015] The beneficial effects of this application are: This application provides a broadband satellite antenna, including a first satellite antenna, a navigation satellite antenna and a second satellite antenna, with a wide frequency coverage range, which can meet the antenna requirements of the Beihang platform. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of a broadband satellite antenna provided in the embodiments of this application; Figure 2 This is the second schematic diagram of the structure of the broadband satellite antenna provided in the embodiments of this application; Figure 3 This is a schematic diagram showing the first satellite antenna and the navigation satellite antenna stacked sequentially. Figure 4 This is a schematic diagram of the second satellite antenna; Figure 5 This is the third schematic diagram of the structure of the broadband satellite antenna provided in the embodiments of this application; Figure 6 This is a circuit diagram showing the connection between the first feed unit and the first satellite antenna; Figure 7 This is a circuit diagram showing the connection between the second feed unit and the second satellite antenna. Figure 8 This is the gain curve of the first satellite antenna at a low elevation angle of 20 degrees; Figure 9 This is the gain curve of the second satellite antenna at a low elevation angle of 20 degrees; Figure 10 This is the cross-sectional gain pattern of a navigation satellite antenna.

[0018] Explanation of reference numerals in the attached drawings: 1. Metal base plate; 2. First satellite antenna; 3. Navigation satellite antenna; 4. Second satellite antenna; 5. First antenna interface; 6. Second antenna interface; 7. Third antenna interface; 8. First coupling point; 9. Second coupling point; 10. Third coupling point; 11. First substrate; 12. First reflector; 13. Second substrate; 14. Second reflector; 15. Third substrate; 16. Third reflector; 17. Metal via; 18. First feed unit; 19. Second feed unit; 20. Via. Detailed Implementation

[0019] 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 some embodiments of this application, but not all embodiments.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that if the terms "upper", "lower", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other. The following, in conjunction with the accompanying drawings, provides specific examples illustrating the broadband satellite antenna provided in this application.

[0025] Figure 1 This is one of the structural schematic diagrams of the broadband satellite antenna provided in the embodiments of this application, such as... Figure 1As shown, the broadband satellite antenna includes a metal base plate 1, a first satellite antenna 2 and a navigation satellite antenna 3 stacked sequentially in a first region on the top surface of the metal base plate, and a second satellite antenna 4 disposed in a second region on the top surface of the metal base plate.

[0026] The first satellite antenna 2 is a high-frequency satellite antenna for non-terrestrial networks (NTNs), used to achieve high-speed, high-capacity data transmission; the second satellite antenna 4 is a low-frequency satellite antenna for NTNs, used to ensure wide coverage, strong penetration, and high-reliability communication. In NTNs, the high-frequency and low-frequency antennas do not work independently, but rather cooperate to achieve a balance between high speed and wide coverage, as well as reliability and flexibility.

[0027] The first satellite antenna 2 measures 38*38*7mm, with a transmission frequency of 1980MHz~2010MHz and a reception frequency of 2170MHz~2200MHz. The second satellite antenna 4 measures 45*45*10mm, with a transmission frequency of 1626.5MHz~1675MHz and a reception frequency of 1518MHz~1559MHz.

[0028] The navigation satellite antenna 3 is a key component for receiving signals from the Global Navigation Satellite System (GNSS). It typically does not require active signal transmission. The antenna measures 20*20*4mm. Its receiving frequency in the B1 band is 1561.098MHz, primarily used for civilian navigation and positioning services. In the B2 band, it receives at 1207.140MHz, providing dual-frequency positioning capabilities together with the B1 band to improve positioning accuracy. In the B3 band, it receives at 1268.52MHz, primarily used for military services, offering even higher positioning accuracy and anti-interference capabilities.

[0029] Figure 2 This is the second schematic diagram of the structure of the broadband satellite antenna provided in the embodiments of this application. Figure 2 This is a schematic diagram showing the bottom view of the metal base plate. (Example) Figure 2 As shown, the bottom surface of the metal base plate has a first antenna interface 5, a second antenna interface 6, and a third antenna interface 7.

[0030] The first coupling point 8 corresponding to the first connection terminal of the first satellite antenna 2 is connected to the first antenna interface 5; the second coupling point 9 corresponding to the second connection terminal of the navigation satellite antenna 3 is connected to the second antenna interface 6; and the third coupling point 10 corresponding to the third connection terminal of the second satellite antenna 4 is connected to the third antenna interface 7.

[0031] The first connection terminal is a pin of the first satellite antenna 2, the second connection terminal is a pin of the navigation satellite antenna 3, and the third connection terminal is a pin of the second satellite antenna 4. These pins are key interface components connecting the antenna to external circuits, and their core function is to transmit electrical signals. The number of pins in the first, second, and third connection terminals is not limited. For example, in this embodiment, the first connection terminal has 2 pins (corresponding to 2 first coupling points 8), the second connection terminal has 1 pin (corresponding to 1 second coupling point 9), and the third connection terminal has 2 pins (corresponding to 2 third coupling points 10).

[0032] For example, in a receiving scenario, the electromagnetic wave signal captured by the antenna is transmitted to the device's RF receiving circuit via pins for amplification, demodulation, and other processing. In a transmitting scenario, the RF electrical signal generated by the device is transmitted to the antenna via pins, where it is converted into electromagnetic waves and radiated outwards. Pins are typically made of metals with excellent conductivity (such as copper or gold-plated materials) to reduce signal loss during transmission and ensure the integrity of the RF signal.

[0033] In summary, this application provides a broadband satellite antenna with a wide frequency coverage range, which can meet the antenna requirements of the Beihang University platform.

[0034] In another embodiment, Figure 3 This is a schematic diagram showing the first satellite antenna and the navigation satellite antenna stacked sequentially, as shown below. Figure 3 As shown, the first satellite antenna 2 includes a first substrate 11 and a first reflector 12. The bottom surface of the first substrate 11 is fixed to a first region on the top surface of the metal base plate 1. The first reflector 12 may be a copper foil covering the central region of the top surface of the first substrate 11. A first connection terminal is provided on the first reflector. The first connection terminal extends from the top surface of the first substrate to the bottom surface, but does not protrude beyond the bottom surface of the first substrate. Instead, it is connected to a first coupling point on the bottom surface of the first substrate. The coupling point refers to a specific area on the bottom surface of the substrate used to achieve non-contact signal transmission or electrical connection transition. Its core function is to transmit the signal transmitted by the pin to the subsequent circuit through electromagnetic coupling or physical contact, while avoiding structural or performance problems caused by the pin directly protruding from the bottom surface of the substrate.

[0035] The navigation satellite antenna includes a second substrate 13 and a second reflector 14. The bottom surface of the second substrate 13 is fixed in the central area of ​​the first reflector 12. The second reflector 14 may be a copper foil covering the central area of ​​the top surface of the second substrate 13. The second reflector 14 is provided with a second connection terminal. The second connection terminal extends from the top surface of the second substrate to the bottom surface, but does not extend beyond the bottom surface of the second substrate. Instead, it is connected to a second coupling point on the bottom surface of the second substrate.

[0036] The core function of the first substrate 11 and the second substrate 13 is to support the radiator (i.e., the first reflector) and influence the propagation of the electromagnetic field. In this embodiment, the first substrate of the first satellite antenna and the second substrate of the navigation satellite antenna are both made of ceramic materials, which have the following advantages: ceramic materials are high dielectric constant and low loss materials, and have stable dielectric properties. Signal energy is not easily absorbed by the substrate, which can ensure the stability of the antenna's resonant frequency and high signal transmission efficiency; ceramic materials are resistant to high temperature and corrosion, and have a low coefficient of thermal expansion. The antennas made from ceramic materials are not easily deformed in complex environments (such as high temperature and humidity changes), which ensures the stability of the electromagnetic field distribution; ceramics have no bubbles and few impurities inside, which have little interference with the electromagnetic field and can reduce performance fluctuations caused by signal scattering.

[0037] In another embodiment, Figure 4 This is a schematic diagram of the second satellite antenna, as shown below. Figure 4 As shown, the second satellite antenna includes a third substrate 15 and a third reflector 16. The bottom surface of the third substrate 15 is fixed to a second region on the top surface of the metal base plate 1. The third reflector 16 may be a copper foil covering the central region on the top surface of the third substrate 15. A third connection terminal is provided on the third reflector 16. The third connection terminal extends from the top surface of the third substrate to the bottom surface, but does not extend beyond the bottom surface of the third substrate. Instead, it is connected to a third coupling point on the bottom surface of the third substrate.

[0038] The third substrate is a thermoplastic material, such as polyphenylene oxyde (PPO). Thermoplastic materials are materials with low dielectric constant and low loss. The low dielectric constant makes the antenna uniformity good, the production line yield is high, and the antenna production cost is greatly reduced.

[0039] Multiple metal vias 17 are provided on the edge region of the third substrate. The metal vias can connect the top and bottom surfaces of the third substrate and guide the current on the antenna surface to "bypass" through the conductivity of the metal, which effectively extends the "electric length" of the current (i.e. the effective propagation distance of the electromagnetic field). This means that even if the physical size of the antenna is reduced, the metal vias 17 can still allow the electromagnetic field to meet the requirements of the operating wavelength, thereby realizing the miniaturization of the antenna. This allows the antenna to use materials with lower dielectric constants, achieve a wider bandwidth, and a higher gain.

[0040] Figure 5 This is the third schematic diagram of the structure of the broadband satellite antenna provided in the embodiments of this application. Figure 5 This is a schematic diagram showing the bottom view of the metal base plate. (Example) Figure 5As shown, a first feeding unit 18 is also provided on the bottom surface of the metal base plate 1. The input end of the first feeding unit 18 is connected to the first coupling point 8 corresponding to the first connection terminal on the bottom surface of the metal base plate 1. The output end of the first feeding unit 18 is connected to the first antenna interface 5. That is, the first coupling point 8 is connected to the first antenna interface 5 through the first feeding unit 18.

[0041] Figure 6 The circuit diagram showing the connection between the first feed unit and the first satellite antenna is shown below. Figure 6 As shown, the first coupling point 8 corresponding to the first connection terminal (including pin 1 and pin 2) of the first satellite antenna is connected to the input terminal of the first feed unit 18, and the output terminal of the first feed unit 18 is connected to the first antenna interface 5. The output terminal of the first feed unit 18 is also grounded through a 50Ω resistor. The first feed unit 18 can be a 3dB bridge phase-shifting combiner, which can enable the first satellite antenna to produce left-hand circular polarization characteristics and a wide axial ratio bandwidth.

[0042] The second antenna interface 6 is directly connected to the second coupling point 9 corresponding to the second connection terminal on the bottom surface of the metal base plate 1. The second connection terminal uses a single-pin structure, forming a circularly polarized signal through a combined orthogonal method, which improves the signal's anti-interference and anti-multipath capability.

[0043] A second feeding unit 19 is also provided on the bottom surface of the metal base plate 1. The input end of the second feeding unit 19 is connected to the third coupling point 10 corresponding to the third connection terminal on the bottom surface of the metal base plate 1, and the output end of the second feeding unit 19 is connected to the third antenna interface 7. That is, the third coupling point 10 is connected to the third antenna interface 7 through the second feeding unit 19. Figure 7 As shown, the second feed unit 19 can also be a 3dB bridge phase-shifting combiner, which can enable the second satellite antenna to produce right-hand circular polarization characteristics and a wide axial ratio bandwidth.

[0044] The third coupling point 10 corresponding to the third connection terminal (including pin 1 and pin 2) of the second satellite antenna is connected to the input terminal of the second feed unit 19. The output terminal of the second feed unit 19 is connected to the third antenna interface 7. The output terminal of the second feed unit 19 is also grounded through a 50Ω resistor.

[0045] The metal substrate includes a fourth substrate (not shown in the figure) and metal layers covering the top and bottom surfaces of the fourth substrate. The fourth substrate may be, for example, a glass fiber reinforced epoxy resin substrate material (FR-4 material), with copper foil covering the top and bottom surfaces of the FR-4 material, respectively.

[0046] Figure 8 This is the gain curve of the first satellite antenna (a high-frequency satellite antenna for non-terrestrial networks) at a low elevation angle of 20 degrees. Figure 8It can be seen that, within the azimuth angle Phi=0~360 degrees, the first satellite antenna has a gain of >-2.1dBic at the receiving frequency (1980MHz, 2010MHz) within a low elevation angle of 20 degrees (the minimum value on the vertical axis is greater than -2.1dBic); and a gain of >-2.3dBic at the transmitting frequency (2170MHz, 2200MHz) within a low elevation angle of 20 degrees.

[0047] Figure 9 This is the gain curve of the second satellite antenna (a low-frequency satellite antenna for non-terrestrial networks) at a low elevation angle of 20 degrees. Figure 9 It can be seen that, within the azimuth angle Phi=0~360 degrees, the second satellite antenna has a gain of >-5.7dBic at the receiving frequency (1626MHz, 1675MHz) within a low elevation angle of 20 degrees; and a gain of >-3.2dBic at the transmitting frequency (1518MHz, 1559MHz) within a low elevation angle of 20 degrees.

[0048] Figure 8 and Figure 9 The antenna for the non-terrestrial network has good non-circularity at a low elevation angle of 20 degrees, with a gain of more than -2.1 dBic and -5.7 dBic at the receiving frequency and more than -2.3 dBic and -3.2 dBic at the transmitting frequency. The antenna gain at the low elevation angle can meet the network access requirements of the Beihang University platform.

[0049] Figure 10 The diagram shows the cross-sectional gain pattern of the navigation satellite antenna. As can be seen from the diagram, the normal gain of the navigation satellite antenna at 1575MHz (Phi 90) is 1.8dBic, indicating that the navigation satellite antenna has good reception performance, which can ensure that the signal quality received by the ground terminal is high and can meet the basic accuracy positioning requirements.

[0050] In summary, this application provides a broadband satellite antenna with overall dimensions of 127*67*10mm. When the navigation satellite antenna 3 is operating, the first reflector 12 on the first satellite antenna 2 serves as the reflector for the navigation satellite antenna 3. When the first satellite antenna 2 and the second satellite antenna 4 are operating, the metal base plate 1 acts as the reflector, and the reflector's function is to reflect antenna signals. The metal base plate 1 is also provided with six through holes 20 for fixing the metal base plate to other structures.

[0051] The second reflector 14 (copper foil) on the second satellite antenna 4 (a low-frequency satellite antenna for non-terrestrial networks) serves as a radiating surface for receiving or radiating signals. Typically, the copper foil is half the dielectric wavelength. The bottom surface of the second satellite antenna 4 is also covered with copper foil, serving as the ground plane. The antenna radiation is generated at the edge between the upper conductor and the ground plane. The dielectric wavelength is proportional to the dielectric constant of the thermoplastic material; half the dielectric wavelength refers to the length of the copper foil (length = width) being approximately half the dielectric wavelength.

[0052] Based on the broadband satellite antenna provided in the above embodiments, this application also provides a satellite communication device, including a satellite communication module and the broadband satellite antenna provided in any of the above embodiments. The satellite communication module is connected to the first antenna interface, the second antenna interface, and the third antenna interface of the broadband satellite antenna.

[0053] Among them, the satellite communication module is the core processing unit of the satellite communication equipment, responsible for core functions such as signal modulation and demodulation, data processing, and protocol conversion (for example, encoding the signal to be transmitted into a radio frequency signal suitable for satellite transmission, or decoding and parsing the satellite signal received by the antenna); the broadband satellite antenna is the signal transceiver component of the satellite communication equipment, which has wideband operating capability.

[0054] The broadband satellite antenna has three interfaces: a first antenna interface, a second antenna interface, and a third antenna interface. The satellite communication module connects to these three interfaces respectively to achieve signal reception: the antenna transmits the captured satellite signals (such as satellite data in different frequency bands) to the satellite communication module through the three interfaces, where the module processes them (amplification, demodulation, decoding, etc.). Alternatively, it can achieve signal transmission: the transmission signals generated by the satellite communication module (such as user data and control commands) are transmitted to the antenna through the three interfaces, where the antenna converts them into electromagnetic waves and transmits them to the satellite.

[0055] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A broadband satellite antenna, characterized in that, include: A metal base plate, a first satellite antenna and a navigation satellite antenna stacked sequentially in a first region on the top surface of the metal base plate, and a second satellite antenna in a second region on the top surface of the metal base plate; The first satellite antenna and the second satellite antenna are respectively a high-frequency satellite antenna and a low-frequency satellite antenna for a non-terrestrial network; The bottom surface of the metal base plate has: a first antenna interface, a second antenna interface, and a third antenna interface; the first connection terminal of the first satellite antenna, the second connection terminal of the navigation satellite antenna, and the third connection terminal of the second satellite antenna are respectively connected to the first antenna interface, the second antenna interface, and the third antenna interface.

2. The wideband satellite antenna of claim 1, wherein, The first satellite antenna includes: a first substrate and a first reflector; The bottom surface of the first substrate is fixed in the first area on the top surface of the metal base plate, the first reflector is disposed in the central area on the top surface of the first substrate, and the first reflector is provided with the first connecting terminal. The navigation satellite antenna includes a second substrate and a second reflector, wherein the bottom surface of the second substrate is fixed in the central area of ​​the first reflector, the second reflector is disposed in the central area of ​​the top surface of the second substrate, and the second reflector is provided with the second connection terminal.

3. The wideband satellite antenna of claim 2, wherein, Both the first substrate and the second substrate are substrates made of ceramic materials.

4. The broadband satellite antenna according to claim 1, characterized in that, The second satellite antenna includes: a third substrate and a third reflector; The bottom surface of the third substrate is fixed in the second region on the top surface of the metal base plate, the third reflector is disposed in the central region on the top surface of the third substrate, and the third reflector is provided with the third connecting terminal.

5. The wideband satellite antenna of claim 4, wherein, The edge region of the third substrate is provided with multiple metal vias.

6. The broadband satellite antenna according to claim 4, characterized in that, The third substrate is a substrate made of thermoplastic material.

7. The broadband satellite antenna according to claim 1, characterized in that, The bottom surface of the metal base plate is also provided with: a first power supply unit; The input terminal of the first power supply unit is connected to the first coupling point corresponding to the first connection terminal on the bottom surface of the metal base plate, the output terminal of the first power supply unit is connected to the first antenna interface, and the second antenna interface is connected to the second coupling point corresponding to the second connection terminal on the bottom surface of the metal base plate.

8. The broadband satellite antenna according to claim 1, characterized in that, The bottom surface of the metal base plate is also provided with: a second power supply unit; The input terminal of the second power supply unit is connected to the third coupling point corresponding to the third connection terminal on the bottom surface of the metal base plate, and the output terminal of the second power supply unit is connected to the third antenna interface.

9. The wideband satellite antenna of claim 1, wherein, The metal base plate includes: a fourth substrate, and a metal layer covering the top and bottom surfaces of the fourth substrate.

10. A satellite communication device, characterized by include: Satellite communication module and broadband satellite antenna as described in any one of claims 1-9; The satellite communication module connects to the first antenna interface, the second antenna interface, and the third antenna interface of the broadband satellite antenna.

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