High and low orbit satellite fusion multi-band compact antenna
By integrating multiple radio frequency antennas and a motherboard into a high- and low-orbit satellite fusion multi-band compact antenna, the problem of multi-band fusion and intelligent switching of traditional satellite communication antennas has been solved, realizing intelligent collaboration between high- and low-orbit satellites and ground cellular networks, and improving the reliability and continuity of communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional satellite communication antennas cannot achieve multi-band fusion and intelligent switching, and suffer from problems such as network isolation, frequency band interference, large size, high cost, and insufficient space-ground coordination capabilities, making it difficult to meet the intelligent coordination needs of high and low orbit satellites and ground cellular networks.
A compact antenna integrating high and low orbit satellite frequencies and multiple radio frequency antennas and a motherboard is designed. It adopts a ceramic stacked structure and an internal stacked radiating element layout, combined with an embedded filtering module, to achieve multi-band coverage and intelligent switching, and supports dynamic switching of high and low orbit satellite frequencies and terrestrial LTE frequencies.
It achieves multi-band fusion and intelligent switching, improves the reliability and continuity of communication, reduces antenna size and cost, enhances the security of space-ground collaboration, and is compatible with miniaturized terminals.
Smart Images
Figure CN224082690U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a satellite antenna, and more particularly to a high-low orbit satellite fusion multi-band compact antenna, belonging to the field of satellite communication antenna technology. Background Technology
[0002] Traditional satellite communication systems (such as Tiantong, Beidou-3, and Iridium) generally adopt a single-mode, single-network architecture. Their antenna designs are primarily designed for single satellite networks (such as those supporting only high-orbit or low-orbit satellites) or single-frequency band communication scenarios, making it impossible to achieve multi-band fusion and intelligent switching. Specifically, existing technologies have the following limitations:
[0003] (1) Network isolation: Traditional antennas only support a single satellite communication network (high orbit or low orbit) and cannot dynamically switch high and low orbit satellite links according to signal quality, which makes communication interruption easy to occur in complex geographical environments or mobile scenarios.
[0004] (2) Frequency band interference problem: Due to the lack of anti-interference optimization in the design of multi-band antennas, signals of different frequency bands (such as C / Ku band of high-orbit satellites, Ka / L band of low-orbit satellites, and LTE band of terrestrials) are prone to cross interference, which affects the communication quality.
[0005] (3) Size and cost limitations: Traditional multi-band antennas use a split structure or external filter design, resulting in a large size, low integration, difficulty in adapting to portable terminals or miniaturized IoT devices, and high manufacturing costs.
[0006] (4) Lack of space-ground coordination capability: Existing antennas are not deeply integrated with terrestrial cellular networks (such as 4G / 5G), and cannot automatically switch to terrestrial base stations when there is no satellite signal, resulting in insufficient communication redundancy and continuity.
[0007] (5) With the proposal of the vision of 6G full coverage, the integrated air-space-ground-sea network needs to support the dynamic integration of heterogeneous networks. However, existing technologies are difficult to meet the intelligent coordination requirements of high and low orbit satellites and ground cellular networks, especially in achieving multi-band compatibility, low interference, and high reliability communication in compact terminals.
[0008] Therefore, developing and designing a multi-frequency integrated low-Earth orbit satellite communication antenna is an important way to solve the current problems of low-Earth orbit satellite communication antennas. Summary of the Invention
[0009] This utility model aims to provide a high- and low-orbit satellite integrated multi-band compact antenna. Through integrated innovative design, it solves the above-mentioned problems, realizes multi-band integration and intelligent switching, anti-interference and compact design, enhanced security through space-ground collaboration, and low-cost industrialization adaptation.
[0010] To address the aforementioned existing technical problems, the technical objective of this utility model is to provide a high-low orbit satellite integrated multi-band compact antenna, which integrates various radio frequency antennas and a motherboard to achieve the technical objective of multiple frequency band coverage and communication modes.
[0011] To achieve the above objectives, this utility model provides a high-low orbit satellite fusion multi-band compact antenna, including a connected upper shell and a bottom shell, several support columns mounted on the top surface of the bottom shell, and a DCS low-orbit satellite communication antenna, a high-orbit satellite RX antenna, a high-orbit satellite TX antenna, a GNSS positioning antenna, a 4G LTE antenna, and a motherboard mounted in the cavity of the upper shell.
[0012] The DCS low-orbit satellite communication antenna includes an antenna PCB board mounted on the top surface of a support column, a four-armed spiral antenna body mounted on the top surface of the antenna PCB board, and an RF output port mounted on the bottom surface of the antenna PCB board; and the feed point of the four-armed spiral antenna body is connected to the feed network on the antenna PCB board, and the RF output port is connected to the main board via a coaxial cable.
[0013] The high-orbit satellite RX antenna, high-orbit satellite TX antenna, and GNSS positioning antenna adopt a ceramic stacked structure. From top to bottom, the ceramic stacked structure includes an upper ceramic substrate dedicated to the high-orbit satellite RX antenna, a lower ceramic substrate integrating the high-orbit satellite TX antenna and the GNSS positioning antenna, and a common PCB board. The feed points of the high-orbit satellite RX antenna and the GNSS positioning antenna are respectively connected to the corresponding LNA circuits on the common PCB board. The feed point of the high-orbit satellite TX antenna is connected to the PA circuit on the main board. The ceramic stacked structure is placed at the center of the four-arm helical antenna body, and the common PCB board is fixed to the antenna PCB board below by several metal studs.
[0014] The 4G LTE antenna is placed below the antenna PCB board and connected to the motherboard via a coaxial cable;
[0015] The motherboard is placed below the antenna PCB board and is connected to the feed network and LNA circuit on the antenna PCB board respectively.
[0016] Furthermore, the common PCB board is also provided with a directional coupler; the directional coupler includes four ports, two input ports are respectively connected to the feed point of the high-orbit satellite TX antenna and the feed point of the GNSS positioning antenna, and two output ports respectively output a left-hand circularly polarized signal and a right-hand circularly polarized signal, with the left-hand circularly polarized signal connected to the PA circuit corresponding to the high-orbit satellite TX antenna and the right-hand circularly polarized signal connected to the LNA circuit corresponding to the GNSS positioning antenna.
[0017] Furthermore, the 4G antenna is a flexible FPC antenna and is attached to the inner wall of the upper shell below the antenna PCB board.
[0018] Furthermore, the four-armed helical antenna body is wound into a cylindrical shape, including a first dielectric substrate and four radiating arms loaded on its outer surface; the four radiating arms have the same shape and are arranged sequentially at 90° intervals around the axis of the cylinder.
[0019] Each of the radiating arms is one-quarter of the operating wavelength in length and is wound into a spiral shape by four bends, including a first metal line, a second metal line, a third metal line, a fourth metal line and a fifth metal line connected in sequence from the outside to the inside; the bottom edge of the first metal line is provided with the feed point and short-circuit point of the four-arm spiral antenna body;
[0020] The antenna PCB board includes a second dielectric substrate and a feed network loaded on its top surface; the feed network includes four signal ports and four ground ports.
[0021] Furthermore, the four radiating arms are sequentially connected to four signal ports through their respective feed points, and sequentially connected to four ground ports through their respective short-circuit points;
[0022] Furthermore, in this invention, the first metal line, the third metal line, and the fifth metal line are parallel to each other and form a preset tilt angle with the bottom edge of the first dielectric substrate; the second metal line and the fourth metal line are respectively parallel to the bottom edge of the first dielectric substrate.
[0023] Furthermore, the power supply network excites the four radiating arms with equal amplitude through four signal ports, and outputs signals with phases of 0°, 90°, 180°, and 270° respectively, with the phases lagging by 90° clockwise to form left-hand circular polarization.
[0024] In summary, this utility model of a high- and low-orbit satellite integrated multi-band compact antenna features miniaturization, lightweight design, and multi-band coverage. It also supports intelligent switching between high-orbit satellites (C / Ku band), low-orbit satellites (Ka / L band), and terrestrial LTE bands, greatly improving the reliability and continuity of communication, meeting people's growing communication needs, and promoting the further development of communication technology.
[0025] Compared with existing products, this utility model has the following technical advantages:
[0026] (1) Multi-band fusion and intelligent switching: Integrates high-orbit satellite, DCS low-orbit satellite and terrestrial LTE communication frequency bands, monitors signal quality in real time through intelligent control module, and dynamically switches the optimal communication link (terrestrial cellular → high-orbit → low-orbit → high-orbit) to ensure seamless communication across the entire area.
[0027] (2) Anti-interference and compact design: The internal stacked multi-band radiation unit layout is adopted, combined with the embedded filter module to suppress the cross interference of multi-band signals; the antenna volume is reduced by three-dimensional space multiplexing technology to adapt to miniaturized terminals.
[0028] (3) Enhanced security through space-ground collaboration: Construct a dual redundant channel between satellite and ground cellular network. In scenarios with weak signal or no ground base station, data is transmitted back via high-orbit satellite first, while low-orbit satellite serves as a backup link, thereby improving the security of data transmission.
[0029] (4) Low-cost industrialization adaptation: Modular design reduces manufacturing complexity, supports high and low orbit satellite protocol compatibility, and meets the needs of large-scale constellation networking and terminal popularization. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;
[0031] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;
[0032] Figure 3 This is an unfolded view of the four-armed helical antenna body in this utility model;
[0033] Figure 4 This is the circuit diagram of the power supply network in this utility model;
[0034] In the diagram: 1. Upper shell, 2. Bottom shell, 3. Support column, 4. DCS low-orbit satellite communication antenna, 41. Antenna PCB board, 5. Upper ceramic substrate, 6. Lower ceramic substrate, 7. Common PCB board, 71. Metal stud, 8. 4G LTE antenna, 11. First dielectric substrate, 12. Radiation arm, 101. Feed point of the four-arm helical antenna body, 102. Short circuit point, 121. First metal line, 122. Second metal line, 123. Third metal line, 124. Fourth metal line, 125. Fifth metal line, 103. Adhesive backing area. Detailed Implementation
[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] It should also be noted that if the embodiments of this utility model involve directional indicators (such as front, back, inside, outside, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0038] like Figure 1 , Figure 2 As shown, this embodiment provides a high-low orbit satellite fusion multi-band compact antenna, including an upper shell 1 and a bottom shell 2 connected together, several support columns 3 installed on the top surface of the bottom shell 2, and a DCS low-orbit satellite communication antenna 4, a high-orbit satellite RX antenna, a high-orbit satellite TX antenna, a GNSS positioning antenna, a 4G LTE antenna 8 and a motherboard installed in the cavity of the upper shell 1, which are described in detail below.
[0039] like Figures 1 to 3 As shown, the DCS low-orbit satellite communication antenna 4 includes an antenna PCB board 41 mounted on the top surface of the support column 3, a four-armed helical antenna body mounted on the top surface of the antenna PCB board 41, and an RF output port mounted on the bottom surface of the antenna PCB board 41. The feed point 101 of the four-armed helical antenna body is connected to the feed network on the antenna PCB board 41, and the RF output port is connected to the motherboard via a coaxial cable. In specific implementation, the RF output port is attached to the corresponding interface on the motherboard via a coaxial cable. In particular, supporting the support column 3 between the antenna PCB board 41 and the bottom shell 2 serves two purposes: firstly, to provide radiation space for the 4G LTE antenna 8 and ensure the performance of the 4G LTE antenna 8; and secondly, to facilitate the attachment of all antennas to the motherboard.
[0040] In other embodiments, such as Figure 3As shown, the four-armed helical antenna is wound into a cylindrical shape, including a first dielectric substrate 11 and four radiating arms 12 loaded on its outer surface. The four radiating arms 12 are identical in shape and size, and are evenly distributed around the axis of the cylinder on the circumference formed by the first dielectric substrate 11, and are arranged at 90° intervals in the circumferential direction. In a specific implementation, the four-armed helical antenna is made of a flexible printed circuit board (FPC). One side of the first dielectric substrate 11 has an adhesive backing area 103, and the other side is connected through the adhesive backing area 103, so that the two sides are fixed together after being wound into a cylindrical shape.
[0041] Each radiating arm 12 is a metal line on a flexible printed circuit board (FPC), with a length equal to one-quarter of the operating wavelength. Furthermore, each radiating arm 12 is wound into a spiral shape through four bends, comprising a first metal line 121, a second metal line 122, a third metal line 123, a fourth metal line 124, and a fifth metal line 125 connected sequentially from the outside in, thereby significantly reducing the extended dimensions of the four-arm spiral antenna and shrinking the overall size of this invention. The bottom edge of the first metal line 121 has a feed point 101 and a short-circuit point 102 for the four-arm spiral antenna, extending downwards from the bottom edge of the first dielectric substrate 11. In specific implementation, the first metal line 121, the third metal line 123, and the fifth metal line 125 are parallel to each other and form a preset tilt angle with the bottom edge of the first dielectric substrate 11; the second metal line 122 and the fourth metal line 124 are parallel to the bottom edge of the first dielectric substrate 11, respectively.
[0042] The antenna PCB board 41 includes a second dielectric substrate 21 and a feed network loaded on its top surface; the feed network includes four signal ports and four ground ports, used to provide signals of equal amplitude and sequentially 90° phase difference to the four radiating arms 12. In specific implementations, such as... Figure 4 As shown, the feeding network excites the four radiating arms 12 with equal amplitude through four signal ports, and outputs signals with phases of 0°, 90°, 180°, and 270° respectively, with the phases lagging by 90° clockwise. This ultimately causes the four radiating arms 12 to emit left-hand circularly polarized electromagnetic waves. Furthermore, the DCS low-orbit satellite communication antenna 4 operates in the 400MHz-403MHz frequency band, and its left-hand circularly polarized gain is ≥-1dBi when the elevation angle is ≥30°.
[0043] like Figure 1 and Figure 2As shown, the high-orbit satellite RX antenna, high-orbit satellite TX antenna, and GNSS positioning antenna adopt a ceramic laminated structure. The ceramic laminated structure, from top to bottom, includes an upper ceramic substrate 5 dedicated to the high-orbit satellite RX antenna, a lower ceramic substrate 6 integrating the high-orbit satellite TX antenna and the GNSS positioning antenna, and a common PCB board 7. Furthermore, the ceramic laminated structure is placed at the center of the four-arm helical antenna body, and the common PCB board 7 is fixed to the lower antenna PCB board 41 by several metal studs 71, as detailed below.
[0044] The high-orbit satellite RX antenna (receiver) features an independently designed upper ceramic substrate 5. It utilizes right-hand circular polarization to match the satellite signal, enhancing receiving sensitivity. A low-noise amplifier (LNA) circuit reduces signal transmission loss and improves communication stability in weak signal environments. It receives downlink communication signals (e.g., Ka-band) from high-orbit satellites (such as geostationary satellites), supporting high-speed data transmission and real-time communication. The LNA circuit is a commonly used circuit whose main function is to amplify and filter the received satellite positioning signal before outputting it to the positioning module for calculation.
[0045] The high-orbit satellite TX antenna (transmitter) is integrated on the lower ceramic substrate 6 and shares the same ceramic layer with the GNSS antenna. It is isolated from the high-orbit satellite RX antenna through a left-hand circular polarization design to reduce self-interference. It also ensures high-frequency transmission efficiency through a power amplifier (PA) circuit and impedance matching, and is used to transmit uplink communication signals to the high-orbit satellite.
[0046] The GNSS positioning antenna shares the same lower ceramic substrate 6 with the high-orbit TX antenna. Through a pre-isolation filter and right-hand circular polarization design, it avoids overlapping interference with the high-orbit TX signal. Through a low-noise amplifier (LNA) circuit, it reduces signal transmission loss and enhances communication stability in weak signal environments. It is used to receive L1 / L2 band signals from global navigation satellite systems (such as GPS, BeiDou, GLONASS) and provide accurate positioning services.
[0047] Furthermore, the common PCB board 7 integrates two LNA circuits (serving the high-orbit satellite RX antenna and the GNSS positioning antenna respectively), meaning the circuitry for both active antennas is implemented on the common PCB board 7. The main board integrates a PA circuit (serving the high-orbit satellite TX antenna), meaning the high-orbit satellite TX antenna circuitry is implemented on the main board. The antenna PCB board 41 integrates a feed network (serving the DCS low-orbit satellite communication antenna 4) and three types of signal jumpers. Both ends of each signal jumper have IPEX terminals, with a signal line in the middle. The three types of signal jumpers are RX, TX, and GNSS signal jumpers, originating from three signals on the common PCB board 7, facilitating assembly onto the main board and enhancing the overall integrity of the antenna section.
[0048] In practical implementation, the upper ceramic substrate 5 has a feed point for the high-orbit satellite RX antenna, and the lower ceramic substrate 6 has feed points for the high-orbit satellite TX antenna and the GNSS positioning antenna. The feed points of the high-orbit satellite RX antenna and the GNSS positioning antenna are connected to the corresponding LNA circuits on the common PCB board 7 to amplify and filter the received satellite positioning signals before outputting them to the positioning module for processing. The feed point of the high-orbit satellite TX antenna is connected to the output port on the common PCB board 7, and then connected to the antenna PCB board 41 via a TX signal jumper, which in turn connects to the PA port on the main board, thus connecting to the PA circuit on the main board.
[0049] In some embodiments, the common PCB board 7 is further provided with a directional coupler; the directional coupler includes four ports, two input ports are respectively connected to the feed point of the high-orbit satellite TX antenna and the feed point of the GNSS positioning antenna, and two output ports respectively output a left-hand circularly polarized signal and a right-hand circularly polarized signal, and the left-hand circularly polarized signal is connected to the PA circuit corresponding to the high-orbit satellite TX antenna, and the right-hand circularly polarized signal is connected to the LNA circuit corresponding to the GNSS positioning antenna, so that the GNSS positioning antenna and the high-orbit satellite TX antenna can be multiplexed.
[0050] In practical implementation, the high-orbit satellite RX antenna (receiver) is located on the upper ceramic substrate 5, employing a right-hand circular polarization design. Polarization orthogonality isolates it from the transmitter, suppressing signal crosstalk, and the upper ceramic substrate 5 outputs the satellite RX signal. The high-orbit satellite TX antenna (transmitter) and the GNSS positioning antenna share the lower ceramic substrate 6. The high-orbit satellite TX antenna employs a left-hand circular polarization design, while the GNSS positioning antenna employs a right-hand circular polarization design. The lower ceramic substrate 6 outputs both satellite TX and GNSS signals. The ceramic stacked structure achieves physical spatial isolation through vertical stacking (upper RX, lower TX+GNSS), reducing self-interference. Furthermore, four metal studs 71 located around the common PCB board 7 secure the common PCB board 7 to the lower antenna PCB board 41, enhancing mechanical stability, optimizing grounding performance, and suppressing electromagnetic coupling interference.
[0051] As can be seen from the above technical solutions, compared with traditional single-layer PCB or split antennas, ceramic stacked structures solve the problems of high integration, low loss, and anti-interference of multi-band antennas through material-structure-circuit collaborative design, and are especially suitable for multi-mode fusion communication of high and low orbit satellites and ground cellular networks in integrated air-space-ground-sea terminals.
[0052] In some embodiments, the dimensions of the ceramic stacked structure are: a lower ceramic substrate 6 of 45mm × 45mm × 6mm stacked with an upper ceramic substrate 5 of 25mm × 25mm × 4mm. As can be seen from the above technical solution, the ceramic stacked structure achieves three-dimensional spatial reuse through the stacking of upper and lower ceramic substrates 5 and 6 (upper layer RX, lower layer TX+GNSS), significantly reducing the volume compared to traditional split designs.
[0053] like Figure 1 , Figure 2 As shown, the 4G LTE antenna 8 is responsible for receiving and transmitting wireless signals. It is placed below the antenna PCB board 41 and connected to the motherboard via a coaxial cable. One end of the coaxial cable is soldered to the 4G LTE antenna 8, and the other end is attached to the motherboard to ensure smooth signal transmission and processing.
[0054] In practical implementation, the 4G LTE antenna 8 adopts a flexible FPC antenna and is attached to the inner wall of the upper shell 1 below the antenna PCB board 41. The antenna standing wave ratio matches the environment of the upper shell 1 and the motherboard to ensure sensitivity and power performance. Furthermore, the 4G LTE antenna 8 mainly operates within specific LTE frequency bands, which vary depending on the region and operator. 4G LTE technology uses multiple frequency bands, including but not limited to 700MHz, 800MHz, 850MHz, 900MHz, 1800MHz, 2100MHz, and 2600MHz. In China, the frequency bands typically covered by the 4G LTE antenna 8 include China Mobile's TD-LTE bands (such as 1880-1900MHz, 2320-2370MHz, 2575-2635MHz, etc.) and China Unicom / China Telecom's FDD-LTE bands (such as 1710-1785MHz, 1880-1920MHz, etc.).
[0055] like Figure 1 As shown, the mainboard is placed below the antenna PCB board 41, near one of its support pillars 3. Furthermore, the mainboard has a PA circuit, which is connected to the feed network on the antenna PCB board 41 and two LNA circuits on the common PCB board 7, thereby connecting to the high-orbit satellite TX antenna, the DCS low-orbit satellite communication antenna 4, the high-orbit satellite RX antenna, and the GNSS positioning antenna, respectively, enabling the four antennas to operate under the control of the mainboard.
[0056] In practical implementation, the motherboard has a PA port and PA circuit corresponding to the high-orbit satellite TX antenna, which are respectively connected to the CORE_RF0 port, RX port, GPS port, and module corresponding to the DCS low-orbit satellite communication antenna 4, the high-orbit satellite RX antenna, and the GNSS positioning antenna to realize their respective functions. The feed point of the high-orbit satellite TX antenna is connected to the output port on the common PCB board 7, and then connected to the antenna PCB board 41 via a TX signal jumper, and then connected to the PA port of the motherboard, thereby connecting to the PA circuit on the motherboard. The PA circuit of the high-orbit satellite TX antenna is connected to the left-hand circular polarization signal of the directional coupler. The feed point of the high-orbit satellite RX antenna is connected to the corresponding LNA circuit on the common PCB board 7, and then connected to the RX port of the motherboard via an RX signal jumper. The GNSS positioning antenna is connected to the corresponding LNA circuit on the common PCB board 7, and then connected to the GPS port of the motherboard via a GNSS signal jumper. The LNA circuit of the GNSS positioning antenna is connected to the right-hand circular polarization signal of the directional coupler. The antenna PCB board 41 has an interface corresponding to the power supply network, which allows the DCS low-orbit satellite communication antenna 4 to be attached to the CORE_RF0 port on the motherboard. In addition, the 4G LTE antenna 8 is directly attached to the motherboard via a coaxial cable.
[0057] In summary, the working process of this utility model is as follows:
[0058] When there is a terrestrial cellular base station signal, this utility model uses a 4G LTE antenna 8 to conduct cellular wireless network communication through the terrestrial cellular base station signal;
[0059] When there is no terrestrial cellular base station signal, this invention intelligently switches to the high-orbit satellite communication frequency band, and the high-orbit satellite RX antenna and high-orbit satellite TX antenna are controlled by the transceiver chip on the motherboard.
[0060] When the high-orbit (geostationary orbit) satellite frequency band signal is poor, this utility model intelligently switches to the DCS low-orbit satellite communication frequency band, and the DCS low-orbit satellite communication antenna 4 communicates through satellite signals.
[0061] When the DCS low-orbit satellite communication signal is poor, this invention intelligently switches to the high-orbit (geostationary orbit) satellite communication frequency band, realizing the switching between high and low satellite networks, and greatly improving the security of data backhaul.
[0062] Furthermore, the GNSS positioning antenna communicates by receiving radio signals from the Global Navigation Satellite System (GNSS), and receives satellite signals through the lower ceramic substrate 6. The LNA signal is then amplified and demodulated by the positioning module to output positioning information.
[0063] As can be seen from the above, this utility model adds a high-orbit satellite RX antenna, a high-orbit satellite TX antenna, a GNSS positioning antenna, and a 4G LTE antenna 8 to the DCS low-orbit satellite communication antenna 4. The high-orbit satellite RX antenna, high-orbit satellite TX antenna, and GNSS positioning antenna adopt a ceramic stacked structure and are reasonably arranged inside the structure of the DCS low-orbit satellite communication antenna 4. While ensuring high performance indicators, it meets the application requirements of circularly polarized antennas that must have low cost, compact structure, and small size. Under the control of the motherboard, it achieves the technical effect of multiple frequency band coverage and intelligent communication modes.
[0064] Furthermore, although the principle of this utility model has been described in detail above with reference to preferred embodiments, those skilled in the art should understand that the above embodiments are merely illustrative explanations of the implementation of this utility model and are not intended to limit the scope of this utility model. The details in the embodiments do not constitute a limitation on the scope of this utility model. Any obvious changes, such as equivalent transformations or simple substitutions, based on the technical solution of this utility model without departing from its spirit and scope fall within the protection scope of this utility model.
Claims
1. A compact antenna for high and low orbit satellite fusion with multiple frequency bands, characterized in that, It includes a connected upper shell and a lower shell, several support columns mounted on the top surface of the lower shell, and a DCS low-orbit satellite communication antenna, a high-orbit satellite RX antenna, a high-orbit satellite TX antenna, a GNSS positioning antenna, a 4G LTE antenna, and a motherboard mounted in the cavity of the upper shell. The DCS low-orbit satellite communication antenna includes an antenna PCB board mounted on the top surface of a support column, a four-armed spiral antenna body mounted on the top surface of the antenna PCB board, and an RF output port mounted on the bottom surface of the antenna PCB board; and the feed point of the four-armed spiral antenna body is connected to the feed network on the antenna PCB board, and the RF output port is connected to the main board via a coaxial cable. The high-orbit satellite RX antenna, high-orbit satellite TX antenna, and GNSS positioning antenna adopt a ceramic stacked structure. From top to bottom, the ceramic stacked structure includes an upper ceramic substrate dedicated to the high-orbit satellite RX antenna, a lower ceramic substrate integrating the high-orbit satellite TX antenna and the GNSS positioning antenna, and a common PCB board. The feed points of the high-orbit satellite RX antenna and the GNSS positioning antenna are respectively connected to the corresponding LNA circuits on the common PCB board. The feed point of the high-orbit satellite TX antenna is connected to the PA circuit on the main board. The ceramic stacked structure is placed at the center of the four-arm helical antenna body, and the common PCB board is fixed to the antenna PCB board below by several metal studs. The 4G LTE antenna is placed below the antenna PCB board and connected to the motherboard via a coaxial cable; The motherboard is placed below the antenna PCB board and is connected to the feed network and LNA circuit on the antenna PCB board respectively.
2. The high-low orbit satellite fusion multi-band compact antenna according to claim 1, characterized in that, The common PCB board is also equipped with a directional coupler; the directional coupler includes four ports, two input ports are respectively connected to the feed point of the high-orbit satellite TX antenna and the feed point of the GNSS positioning antenna, and two output ports respectively output a left-hand circularly polarized signal and a right-hand circularly polarized signal, with the left-hand circularly polarized signal connected to the PA circuit corresponding to the high-orbit satellite TX antenna and the right-hand circularly polarized signal connected to the LNA circuit corresponding to the GNSS positioning antenna.
3. A high-low orbit satellite fusion multi-band compact antenna according to claim 1, characterized in that, The 4G LTE antenna is a flexible FPC antenna and is attached to the inner wall of the upper shell below the antenna PCB board.
4. A high-low orbit satellite fusion multi-band compact antenna according to claim 1, characterized in that, The four-armed helical antenna body is wound into a cylindrical shape, including a first dielectric substrate and four radiating arms loaded on its outer surface; the four radiating arms have the same shape and are arranged sequentially at 90° intervals around the axis of the cylinder. Each of the radiating arms is one-quarter of the operating wavelength in length and is wound into a spiral shape by four bends, including a first metal line, a second metal line, a third metal line, a fourth metal line and a fifth metal line connected in sequence from the outside to the inside; the bottom edge of the first metal line is provided with the feed point and short-circuit point of the four-arm spiral antenna body; The antenna PCB board includes a second dielectric substrate and a feed network loaded on its top surface; the feed network includes four signal ports and four ground ports. Furthermore, the four radiating arms are sequentially connected to four signal ports through their respective feed points, and sequentially connected to four ground ports through their respective short-circuit points.
5. A high-low orbit satellite fusion multi-band compact antenna according to claim 4, characterized in that, The first, third, and fifth metal lines are parallel to each other and form a preset tilt angle with the bottom edge of the first dielectric substrate; the second and fourth metal lines are parallel to the bottom edge of the first dielectric substrate, respectively.
6. A high-low orbit satellite fusion multi-band compact antenna according to claim 4 or 5, characterized in that, The power supply network excites the four radiating arms with equal amplitude through four signal ports and outputs signals with phases of 0°, 90°, 180° and 270° respectively, with the phases lagging by 90° clockwise to form left-hand circular polarization.