System-in-package chip of vehicle-mounted GNSS receiver, receiver and automobile

Abstract

The utility model provides a kind of system level package chip of vehicle-mounted GNSS receiver, receiver and car, chip includes outer circle contact, inner circle contact and chip body;First, eleventh, twenty-third, twenty-fifth, twenty-seventh, thirtieth, thirty-second contact in outer circle contact, and fifth, eighteenth to twenty-fourth, twenty-eighth contact in inner circle contact, are all ground terminal;Fifth contact in outer circle contact and twenty-ninth contact in inner circle contact, are all first power supply terminal;Sixth contact and seventh contact are connected in outer circle contact, and seventh contact is second power supply terminal;Thirty-sixth contact and thirty-fifth contact are connected in outer circle contact, and thirty-fifth contact is third power supply terminal;Twenty-sixth, twenty-eighth, twenty-ninth and thirty-first contact in outer circle contact are four radio frequency input ports respectively;Fortieth contact in outer circle contact and first contact in inner circle contact are respectively communication interface for wired communication.

Description

Technical Field

[0001] This utility model relates to the field of satellite navigation, and in particular to a system-in-package chip for a vehicle-mounted GNSS receiver, the receiver, and the vehicle. Background Technology

[0002] In communication systems within the intelligent transportation sector, the GNSS (Global Navigation Satellite System) receiver chip serves as the core processing unit, and its stable operation directly determines the reliability of the entire system's data transmission, command processing, and control functions. With the continuous improvement of automation and intelligence in the intelligent transportation field, intelligent driving terminals are becoming increasingly complex and versatile, placing higher demands on the operational stability of receiver chips.

[0003] Currently, regarding power supply, the vehicle power system is prone to abnormal chip voltage during vehicle start-up, acceleration, braking, and the use of various electrical devices, leading to data processing errors or even chip damage. Inadequate grounding design cannot effectively release induced currents generated by static electricity and electromagnetic interference, causing surge impacts on the chip and affecting signal transmission accuracy. Insufficient reliability of RF signal input, with signal attenuation and interference, results in data loss or misinterpretation by the chip. These problems make it difficult for GNSS receiver chips to operate stably in vehicle communication systems, reducing the stability and reliability of the system and failing to meet the requirements of efficient and stable communication. Summary of the Invention

[0004] Based on the above situation, the main purpose of this utility model is to provide a system-in-package (SIBP) chip for a vehicle-mounted GNSS receiver, a receiver, and a vehicle. The SIBP chip for the vehicle-mounted GNSS receiver can operate stably in the vehicle communication system, thereby improving the stability and reliability of the entire vehicle communication system.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a system-in-package chip for a vehicle-mounted GNSS receiver, which includes a chip body and outer and inner ring contacts at the bottom of the chip body.

[0007] Viewed vertically from the bottom, the upper left area of ​​the bottom is the projection area of ​​the positioning mark on the chip body on the bottom. The outer ring contacts include the first to the fortieth contacts, which are evenly distributed clockwise on the four sides starting from the upper left area. The inner ring contacts include the first to the thirty-second contacts, which are evenly distributed clockwise on the four sides starting from the upper left area.

[0008] The first, eleventh, twenty-third, twenty-fifth, twenty-seventh, thirtieth, and thirty-second contacts in the outer ring, and the fifth, eighteenth to twenty-fourth, and twenty-eighth contacts in the inner ring, are all ground terminals. The fourth contact in the outer ring and the twenty-ninth contact in the inner ring are both first power supply terminals. The fifth contact in the outer ring is used to connect to the sixth contact in the outer ring through an external inductor and capacitor, and the sixth contact is the second power supply terminal. The thirty-sixth contact in the outer ring is used to connect to the thirty-fifth contact in the outer ring through an external inductor and capacitor, and the thirty-fifth contact is the third power supply terminal. The twenty-sixth, twenty-eighth, twenty-ninth, and thirty-first contacts in the outer ring are four radio frequency input ports. The fortieth contact in the outer ring and the first contact in the inner ring are communication interfaces for wired communication with the host computer.

[0009] Furthermore, the chip body encapsulates a GNSS receiver module and an RF front-end module, and also encapsulates at least one of a power module, a clock module, and a storage module;

[0010] The GNSS receiver module is connected to the power supply module, which converts the input voltage into the operating voltage of the GNSS receiver module; the GNSS receiver module is connected to the clock module, which provides a clock signal to the GNSS receiver module; and the GNSS receiver module interacts with the storage module.

[0011] The radio frequency front-end module is connected to the radio frequency input port and the GNSS receiver module. The radio frequency front-end module is used to process the radio frequency signal received by the radio frequency input port and then input it into the GNSS receiver module. The GNSS receiver module is connected to the communication interface.

[0012] Furthermore, the RF front-end module includes a triplet, the input terminal of which is connected to a first RF input port, the first and second output terminals of which are respectively connected to two receiving channels of the GNSS receiver module, the third output terminal of which is connected to a second RF input port, and the third and fourth RF input ports are respectively connected to the other two receiving channels of the GNSS receiver module.

[0013] Furthermore, the GNSS receiver module includes a radio frequency (RF) subsystem; the RF subsystem includes a first receiving channel, a second receiving channel, a third receiving channel, and a fourth receiving channel, wherein the first receiving channel is connected to the first output terminal of the tripod, the second receiving channel is connected to the second output terminal of the tripod, the third receiving channel is connected to the third RF input port, and the fourth receiving channel is connected to the fourth RF input port.

[0014] Furthermore, the GNSS receiver module also includes a baseband subsystem and an application processor subsystem, wherein the input terminal of the baseband subsystem is connected to the radio frequency subsystem, and its output terminal is connected to the application processor subsystem, and the application processor subsystem is connected to a function control interface and the communication interface.

[0015] Furthermore, the functional control interface includes one or both of a time synchronization signal interface and a GPIO interface, and the communication interface includes a CAN interface, an Ethernet interface, a UART interface, an SPI interface, and an I / O interface. 2 One or more of the C interfaces.

[0016] Furthermore, the chip body includes a substrate having opposing first and second surfaces;

[0017] The power module, clock module, storage module, and RF front-end module are all encapsulated on the first side of the substrate; the GNSS receiver module is encapsulated on the second side of the substrate.

[0018] A conductive line is provided between the first surface and the second surface, and the power module, clock module, storage module and radio frequency front-end module are all connected to the GNSS receiver module through the conductive line.

[0019] Furthermore, the storage module is disposed in a first region of the first surface, the first region being the projection area of ​​the GNSS receiver module on the first surface along the thickness direction of the substrate.

[0020] Furthermore, the storage module includes: a dynamic random access memory unit and a non-volatile memory unit;

[0021] The non-volatile memory cell is disposed on the first surface, and the dynamic random access memory cell is disposed on top of the non-volatile memory cell.

[0022] This utility model also provides a receiver for a satellite navigation system, which includes a single antenna and a system-in-package (SiP) chip for the vehicle-mounted GNSS receiver described above. The single antenna is connected to the first radio frequency (RF) input port of the SiP chip for the vehicle-mounted GNSS receiver, and the second RF input port and the third RF input port are connected externally to the chip.

[0023] This utility model also provides a receiver for a satellite navigation system, which includes a first antenna, a second antenna, a duplexer, and a system-in-package chip of the above-mentioned vehicle-mounted GNSS receiver. The first antenna is connected to the first radio frequency input port, the second antenna is connected to the input terminal of the duplexer, and the two output terminals of the duplexer are respectively connected to the third radio frequency input port and the fourth radio frequency input port.

[0024] This utility model also provides a receiver for a satellite navigation system, which includes a first antenna, a second antenna, a duplexer, an RF switching switch, and a system-in-package chip for the above-mentioned vehicle-mounted GNSS receiver;

[0025] When implementing the single-antenna full-frequency positioning function, the first antenna is connected to the first radio frequency input port, and the second radio frequency input port is connected to the third radio frequency input port outside the chip through the radio frequency switching switch;

[0026] When implementing the dual-antenna tri-frequency positioning and orientation function, the first antenna is connected to the first radio frequency input port, the second antenna is connected to the input of the duplexer, one output of the duplexer is connected to the third radio frequency input port through the radio frequency switching switch, and the other output of the duplexer is connected to the fourth radio frequency input port.

[0027] This invention also provides a car that includes a receiver for the aforementioned satellite navigation system.

[0028] The system-in-package chip for the vehicle-mounted GNSS receiver provided by this utility model significantly improves the chip's signal processing capabilities by clearly defining the contacts for connecting the power supply, the grounding contact, and the RF input port. At the same time, the standardized connection facilitates the integration of the chip with other components, improves compatibility, and enables the chip to operate stably under various vehicle environment conditions, thereby improving the stability and reliability of the entire vehicle communication system and meeting a variety of application requirements.

[0029] The system-in-package chip for the vehicle-mounted GNSS receiver provided by this utility model places most of the power supply contacts on the outer ring, which can reduce the line impedance during power transmission and improve power supply stability. The outer ring is provided with RF input port contacts, which can reduce the signal transmission path length, reduce signal loss and interference, and enhance the reception quality of RF signals. Communication interface contacts are arranged on both the inner and outer rings, which can balance wiring requirements and flexibly meet the connection requirements of different communication protocols, thereby improving the chip's communication compatibility and reliability.

[0030] Furthermore, reducing the number of grounding contacts on the outer ring avoids ground loop interference with radio frequency signals, resulting in cleaner RF signal transmission. The inner ring, with its increased number of grounding contacts, forms a stable ground plane, providing excellent shielding for the communication interface and internal circuitry, reducing crosstalk between internal signals, and enhancing the chip's overall anti-interference capability. Simultaneously, this asymmetrical grounding layout optimizes the chip's electromagnetic compatibility, enabling stable operation even in complex electromagnetic environments.

[0031] Other beneficial effects of this utility model will be explained in detail through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0032] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the external structure of a system-in-package chip for a vehicle-mounted GNSS receiver according to a preferred embodiment of the present invention.

[0034] Figure 2 This is one of the schematic diagrams of the chip body in the system-in-package chip of a vehicle-mounted GNSS receiver according to a preferred embodiment of the present invention;

[0035] Figure 3 This is the second schematic diagram of the chip body architecture in the system-in-package chip of a vehicle-mounted GNSS receiver according to a preferred embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the chip body packaging structure in a system-in-package chip of a vehicle-mounted GNSS receiver according to a preferred embodiment of the present invention.

[0037] Figure 5 This is one of the structural schematic diagrams of a receiver in a preferred embodiment of the satellite navigation system of this utility model;

[0038] Figure 6This is a second schematic diagram of the receiver structure of a satellite navigation system according to a preferred embodiment of the present invention.

[0039] Figure 7 This is the third schematic diagram of the receiver structure of a satellite navigation system according to a preferred embodiment of the present invention.

[0040] In the picture:

[0041] 100. Outer ring contact; 110. Inner ring contact;

[0042] 200. Chip body; 210. RF front-end module; 220. GNSS receiver module; 2210. RF subsystem; 2220. Baseband subsystem; 2230. Application processor subsystem; 230. Power supply module; 240. Clock module; 250. Storage module; 2510. Non-volatile memory cell; 2520. Dynamic random access memory cell; 260. Substrate; 270. First package; 280. Second package;

[0043] 300, RF input port; 310, First RF input port; 320, Second RF input port; 330, Third RF input port; 340, Fourth RF input port;

[0044] 400. Communication interface;

[0045] 500, Single antenna; 510, First antenna; 520, Second antenna;

[0046] 600. Duplexer;

[0047] 700. Radio frequency switching switch. Detailed Implementation

[0048] The present invention will now be described based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0049] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0050] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0051] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] Satellite navigation systems provide global users with all-weather, all-time, high-precision positioning, navigation, and timing services. Currently, the field of satellite navigation mainly encompasses four global navigation satellite systems (GNSS), two regional satellite navigation systems, and multiple satellite-based augmentation systems (SBAS).

[0053] The four global navigation satellite systems include BeiDou Navigation Satellite System, GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), and Galileo, collectively known as GNSS. The two regional satellite navigation systems are Japan's Quasi-Zenith Satellite System (QZSS) and India's Indian Regional Navigation Satellite System (IRNSS; also known as NAVIC).

[0054] Four global satellite navigation systems, two regional satellite navigation systems, and multiple satellite-based augmentation systems together form today's multi-system, multi-frequency, and ubiquitous satellite navigation network. However, such a large number of satellite navigation signals presents enormous challenges to receiver design.

[0055] Currently common automotive GNSS receiver chips have many problems in terms of power supply, grounding, and radio frequency signal input, making it difficult for GNSS receiver chips to operate stably in automotive communication systems.

[0056] Therefore, based on existing satellite navigation signals and mature chip system-in-package technology, it is necessary to develop a new system-in-package chip for vehicle-mounted GNSS receivers, so that the chip can operate stably in vehicle environments and improve the stability and reliability of the entire vehicle communication system.

[0057] The specific structure of the system-in-package chip of the vehicle-mounted GNSS receiver of this utility model will be described in detail below with reference to the accompanying drawings.

[0058] like Figure 1As shown, the system-in-package chip of the vehicle-mounted GNSS receiver includes a chip body 200 and outer ring contacts 100 and inner ring contacts 110 at the bottom of the chip body 200.

[0059] It should be noted that, for the purpose of explaining the positions of the outer ring contacts 100 and the inner ring contacts 110, when viewing the bottom of the chip body 200 from a direction perpendicular to the bottom of the chip body 200, the upper left of the bottom is the projection area of ​​the positioning mark on the chip body 200 on the bottom. Starting from the upper left area, the outer ring contacts 100 include the first to the fortieth contacts, which are evenly distributed clockwise on the four sides starting from the upper left area. The inner ring contacts 110 include the first to the thirty-second contacts, which are evenly distributed clockwise on the four sides starting from the upper left area.

[0060] The contacts on the first side of the outer ring contacts 100 are numbered W1, W2, ..., W10 in a clockwise direction; the contacts on the second side are numbered W11, W12, ..., W20 in a clockwise direction; the contacts on the third side are numbered W21, W22, ..., W30 in a clockwise direction; and the contacts on the fourth side are numbered W31, W32, ..., W40 in a clockwise direction.

[0061] Meanwhile, the contacts on the first side of the inner ring contacts 110 are numbered N1, N2, ..., N8 in a clockwise direction; the contacts on the second side are numbered N9, N10, ..., N16 in a clockwise direction; the contacts on the third side are numbered N17, N18, ..., N24 in a clockwise direction; and the contacts on the fourth side are numbered N25, N26, ..., N32 in a clockwise direction.

[0062] The first contact (i.e., contact W1) on the first side of the outer ring contact 100, the eleventh contact (i.e., contact W11) on the second side, the twenty-third, twenty-fifth, twenty-seventh and thirtieth contacts (i.e., contacts W23, W25, W27 and W30) on the third side, the thirty-second contact (i.e., contact W32) on the fourth side, and the fifth contact (i.e., contact N5) on the first side of the inner ring contact 110, the eighteenth to twenty-fourth contacts (i.e., contacts N18 to N24) on the third side, and the twenty-eighth contact (i.e., contact N28) on the fourth side are all grounding terminals.

[0063] The fifth contact (i.e., contact W5) on the first side of the outer ring contact 100 and the twenty-ninth contact (i.e., contact N29) on the fourth side of the inner ring contact 110 are both first power supply terminals; the sixth contact (i.e., contact W6) on the first side of the outer ring contact 100 is used to connect with the seventh contact (i.e., contact W7) on the first side of the outer ring contact 100 through an external inductor and capacitor, and the seventh contact is a second power supply terminal; the thirty-sixth contact (i.e., contact W36) on the fourth side of the outer ring contact 100 is used to connect with the thirty-fifth contact (i.e., contact W35) on the fourth side of the outer ring contact 100 through an external inductor and capacitor, and the thirty-fifth contact is a third power supply terminal.

[0064] The 26th, 28th and 29th contacts (i.e., contacts W26, W28 and W29) on the third side of the outer ring contacts 100, and the 31st contact (i.e., contact W31) on the fourth side, are four radio frequency input ports.

[0065] The 40th contact (i.e., contact W40) on the fourth side of the outer ring contact 100 and the first contact (i.e., contact N1) on the first side of the inner ring contact 110 are communication interfaces for wired communication with the host computer.

[0066] Other contacts in the outer ring contact 100 and inner ring contact 110 can be used as ports for connecting other signals as needed.

[0067] It should be noted that the contacts can be spherical or have a similar shape. Furthermore, the bottom of the contacts can be ground flat, making the contacts flush with the bottom surface of the package.

[0068] The system-in-package chip of this vehicle-mounted GNSS receiver ensures a stable power supply, a good grounding design, and reliable RF signal input by clearly defining the contacts at the power supply end, the grounding end, and the RF input port. This enables the chip to operate stably under various vehicle-mounted environmental conditions, improving the stability and reliability of the entire vehicle-mounted communication system.

[0069] Moreover, the dedicated RF input port ensures that the RF signal is input into the chip for processing in the best possible condition, which helps to improve the demodulation accuracy and decoding efficiency of the signal, thereby improving the communication quality, ensuring the accurate transmission and rapid processing of vehicle communication data, and meeting the stringent requirements of vehicle system applications for real-time and accuracy communication.

[0070] In addition, the clear pin and port definitions make it easier to integrate the chip into the vehicle system. Designers can easily lay out and route the circuit board according to the chip's specifications, shorten the product development cycle and reduce design costs, while also facilitating later maintenance and upgrades.

[0071] In automotive applications, due to the complexity of the vehicle's operating environment—ranging from frigid northern winters to scorching summers—chips need to operate stably in extreme temperatures ranging from -40℃ to 105℃. This places higher demands on the high- and low-temperature resistance of components within the system-in-package (SiP) chips of automotive GNSS receivers. Regarding reliability, automotive applications are directly related to personal safety, placing far higher reliability requirements on chips than industrial applications. This necessitates the use of higher-grade, more reliable components in automotive chips. These differences in temperature and reliability lead to distinct designs between SiP chips used in automotive GNSS receivers and those used in industrial applications, from component selection to contact design.

[0072] In some embodiments, such as Figure 2 As shown, the chip body 200 encapsulates an RF front-end module 210 and a GNSS receiver module 220, and also encapsulates at least one of a power supply module 230, a clock module 240, and a storage module 250.

[0073] The radio frequency front-end module 210 is connected to the radio frequency input port 300 and the GNSS receiver module 220. The radio frequency front-end module 210 processes the radio frequency signal received by the radio frequency input port and inputs it into the GNSS receiver module 220. The GNSS receiver module 220 processes the radio frequency signal to obtain the baseband signal containing navigation data, thereby realizing functions such as pseudorange measurement, positioning calculation and time synchronization.

[0074] The power supply module 230 is connected to the GNSS receiver module 220 and is used to convert the input voltage into the operating voltage of the GNSS receiver module 220; the clock module 240 is connected to the GNSS receiver module 220 and is used to provide a clock signal to the GNSS receiver module 220.

[0075] The storage module 250 interacts with the GNSS receiver module 220. For example, the GNSS receiver module 220 writes raw signals, intermediate results, and status during the positioning process into the storage module 250 to support real-time calculation and post-analysis; the GNSS receiver module 220 can also read initialization data, configuration parameters, and historical information from the storage module 250 to optimize positioning efficiency and reliability.

[0076] The GNSS receiver module 220 is connected to the communication interface 400, which in turn connects to an external host. Data sharing and multi-device collaboration can be achieved through the communication interface 400.

[0077] The system-in-package (SIP) chip for a vehicle-mounted GNSS receiver provided by this utility model integrates an RF front-end module 210, a GNSS receiver module 220, a power supply module 230, a clock module 240, or a storage module 250 into a single chip body 200. This allows the integrated chip to achieve all the application functions of traditional GNSS module products while significantly reducing the product size. The final chip size can be as small as 7.4mm*7.4mm, while the size of traditional GNSS modules is typically 16mm*12mm, 16mm*21mm, and 17mm*22mm. When in use, only a small number of external resistors, capacitors, and other components are needed; the chip operates normally after being powered on. A single chip can achieve all the functions of a traditional GNSS module product, which is beneficial for integrating high-precision GNSS full-system positioning functions into intelligent driving terminal products.

[0078] In some embodiments, such as Figure 3 As shown, the RF front-end module 210 uses a tripartite converter, and the four RF input ports 300 of the chip body 200 are the first RF input port 310, the second RF input port 320, the third RF input port 330 and the fourth RF input port 340.

[0079] The input terminal of the tripod is connected to the first RF input port 310. The first and second output terminals of the tripod are respectively connected to the two receiving channels of the GNSS receiver module 220. The third output terminal of the tripod is connected to the second RF input port 320. The third RF input port 330 and the fourth RF input port 340 are respectively connected to the other two receiving channels of the GNSS receiver module 220.

[0080] By connecting the third output of the tripod to the second RF input port 320, the chip can be easily reused in single-antenna full-frequency positioning scenarios and dual-antenna tri-frequency positioning and orientation scenarios.

[0081] When the system-in-package (SoC) chip of the vehicle-mounted GNSS receiver provided by this utility model is used in a single-antenna full-frequency positioning scenario, the first RF input port 310 is externally connected to the single antenna 500, and the second RF input port 320 and the third RF input port 330 are electrically connected externally to the chip body 200. The fourth RF input port 340 is idle. The frequency divider can divide the satellite navigation signal received by the single antenna 500 into three RF signals, and the frequency bands of the three RF signals can be 1559.052MHz~1605.886MHz (i.e., MFH band), 1237.830MHz~1283.865MHz (i.e., LFH band), and 1166.220MHz~1237.830MHz (i.e., LFL band). The three RF signals are input into the GNSS receiver module 220 for processing to achieve single-antenna full-frequency positioning.

[0082] It should be noted that since these three frequency bands correspond to the L1, L2, L5 and L6 frequency bands in the GNSS system, they can be understood as enabling the full-frequency high-precision positioning function of the entire GNSS system.

[0083] When the system-in-package (SoC) chip for a vehicle-mounted GNSS receiver provided by this utility model is used in a dual-antenna, tri-frequency positioning and orientation scenario, the first RF input port 310 is externally connected to the first antenna 510. The third RF input port 330 and the fourth RF input port 340 are externally connected to the second antenna 520 via a duplexer outside the chip body 200. The second RF input port 320 is idle. The duplexer can divide the satellite navigation signal received by the first antenna 510 into three RF signals, and input two of these RF signals with frequency bands of 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz into the GNSS receiver module 220 for processing. At the same time, the external duplexer divides the satellite navigation signal received by the second antenna into two RF signals with frequency bands of 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz. The two radio frequency signals obtained by the duplexer frequency division are also input into the GNSS receiver module 220 for processing.

[0084] It should be noted that since these two frequency bands correspond to the L1, L2 and L5 frequency bands in the GNSS system, they can be understood as enabling the GNSS system to achieve high-precision positioning and orientation functions across three frequencies.

[0085] Specifically, a Tri-Saw Triplexer can be used. The Tri-Saw Triplexer utilizes the characteristics of SAW devices to achieve filtering and separation of signals at different frequencies by exciting and propagating surface acoustic waves on a piezoelectric material surface. It typically consists of three SAW chips and some passive SMT (Surface Mount Technology) devices. Each SAW chip is designed to have good filtering performance for signals within a specific frequency range. Through proper layout and connection, the three filters of different frequencies are combined to form a Triplexer structure, thereby enabling the extraction of signals from three different frequency bands in the input signal separately, or the synthesis of three different frequency bands into a single output signal. The Tri-Saw Triplexer features high selectivity, high temperature stability, small size, and high power handling capability.

[0086] In some embodiments, such as Figure 3 As shown, the GNSS receiver module 220 includes an RF subsystem 2210; the RF subsystem 2210 includes a first receiving channel, a second receiving channel, a third receiving channel and a fourth receiving channel. The first receiving channel is connected to the first output terminal of the tripod, the second receiving channel is connected to the second output terminal of the tripod, the third receiving channel is connected to the third RF input port 330, and the fourth receiving channel is connected to the fourth RF input port 340.

[0087] The system-in-package (SoC) chip for the vehicle-mounted GNSS receiver provided by this invention is used in single-antenna full-frequency positioning scenarios. The MFH band radio frequency signal is input to the GNSS receiver module 220 through the first output terminal and the first receiving channel of the tripeller; the LFL band radio frequency signal is input to the GNSS receiver module 220 through the second output terminal and the second receiving channel of the tripeller; and the LFL band radio frequency signal is input to the GNSS receiver module 220 through the third output terminal, the second radio frequency input port 320, the third radio frequency input port 330, and the third receiving channel of the tripeller. The GNSS receiver module 220 processes the received radio frequency signals to achieve single-antenna full-frequency positioning.

[0088] When the system-in-package (SoC) chip of the vehicle-mounted GNSS receiver provided by this utility model is used in a dual-line tri-frequency positioning and orientation scenario, the MFH band radio frequency signal obtained from the satellite navigation signal received by the first antenna 510 is input into the GNSS receiver module 220 through the first output terminal and the first receiving channel of the tripeller; the LFL band radio frequency signal is input into the GNSS receiver module 220 through the second output terminal and the second receiving channel of the tripeller. The MFH band radio frequency signal obtained from the satellite navigation signal received by the second antenna 520 is input into the GNSS receiver module 220 through the third radio frequency input port 330 and the third receiving channel; the LFL band radio frequency signal is input into the GNSS receiver module 220 through the fourth radio frequency input port and the fourth receiving channel. The GNSS receiver module 220 processes the received radio frequency signals to achieve dual-line tri-frequency positioning and orientation.

[0089] The radio frequency subsystem 2210 is used to downconvert the received radio frequency signal into an intermediate frequency analog signal and then output it, or to downconvert the received radio frequency signal into an intermediate frequency analog signal and then convert the intermediate frequency analog signal into an intermediate frequency digital signal and then output it.

[0090] In the embodiments of this utility model, such as Figure 3 As shown, the GNSS receiver module 220 also includes a baseband subsystem 2220 and an application processor subsystem 2230. The input terminal of the baseband subsystem 2220 is connected to the radio frequency subsystem 2210, and its output terminal is connected to the application processor subsystem 2230. The application processor subsystem 2230 is connected to a function control interface and a communication interface.

[0091] The baseband subsystem 2220 is used to process the signal output from the radio frequency subsystem 2210 to obtain a baseband signal. Specifically, the baseband subsystem 2220 can perform analog-to-digital conversion, signal acquisition, signal tracking, signal demodulation, and positioning observation data calculation on intermediate frequency analog signals; the baseband subsystem 2220 can also directly perform signal acquisition, signal tracking, signal demodulation, and positioning observation calculation on intermediate frequency digital signals.

[0092] The application processor subsystem 2230 is used to schedule and configure the baseband subsystem 2220, and to perform positioning, velocity measurement, and timing processing based on the positioning observations reported by the baseband subsystem 2220. Specifically, the application processor subsystem 2230 can use positioning observations such as pseudorange and carrier phase, combined with satellite coordinates in the navigation message, to calculate the receiver's three-dimensional position, time, and velocity. It can also jointly process positioning observations from various satellite navigation systems to improve positioning reliability and anti-interference capability, and enhance positioning accuracy and stability.

[0093] Furthermore, the functional control interface includes one or both of the following: a time synchronization signal interface and a GPIO interface; the communication interface includes a CAN interface, an Ethernet interface, an eMMC interface, a UART interface, an SPI interface, and an I / O interface. 2 One or more of the C interfaces.

[0094] The interface includes: a time synchronization signal interface for outputting a fixed-frequency second pulse signal; a GPIO interface for GPIO signal input / output connections, configurable via software; a CAN interface for connecting to components supporting the CAN protocol; an Ethernet interface for connecting to Ethernet chips or interfaces; an eMMC interface for connecting to flash memory or EEPRAM; a UART interface for connecting to chips or interfaces supporting the UART serial protocol; and an SPI interface for connecting to chips or interfaces supporting the SPI protocol. 2 The C interface is used for external connections and supports I / O. 2 Chips or interfaces using the C serial port protocol.

[0095] By setting different peripheral interfaces, the system-in-package chip of the vehicle-mounted GNSS receiver provided by this utility model can adapt to the needs of intelligent driving equipment scenarios, reducing product adaptation costs. Dedicated interfaces such as CAN, Ethernet, and eMMC ensure high performance and low power consumption for the chip's core functions. UART, SPI, and I... 2 The C interface, time synchronization signal interface, and GPIO and other communication interfaces enable external interaction links, allowing the chip to meet the technical requirements of high-precision positioning and adapt to diverse application scenarios.

[0096] In addition, the application processor subsystem 2230 is equipped with a high-performance application processor that integrates a double-precision floating-point arithmetic processing unit. Users can choose to use the built-in high-precision positioning and direction finding algorithms or perform secondary development on the application processor to realize various applications such as RTK (Real-Time Kinematic), PPP (Precise Point Positioning), PPP-RTK (Precise Point Positioning and Real-Time Kinematic Fusion Technology), and multi-sensor data fusion processing.

[0097] The system-in-package chip for the vehicle-mounted GNSS receiver provided in this embodiment highly integrates the radio frequency front-end module 210, GNSS receiver module 220, power supply module 230, clock module 240 and storage module 250 in the chip body 200, which greatly reduces the size of the chip body 200.

[0098] In automotive devices where space resources are extremely scarce, this miniaturized chip can free up more space for other components, facilitating device miniaturization. Furthermore, by integrating multiple functional modules into the same package, the connection distance between these modules is significantly shortened, reducing signal transmission paths and effectively minimizing signal loss and interference, thus improving signal transmission stability and speed.

[0099] In some embodiments, such as Figure 4 As shown, the chip body 200 includes a substrate 260, which has a first side and a second side facing each other. The RF front-end module 210, power module 230, clock module 240, and storage module 250 are all packaged on the first side of the substrate 260; the GNSS receiver module 220 is packaged on the second side of the substrate 260. Conductive lines are provided between the first and second sides, and the power module 230, clock module 240, storage module 250, and RF front-end module are all connected to the GNSS receiver module 220 through these conductive lines.

[0100] By setting the power module 230 and the GNSS receiver module 220 on two sides of the substrate 260 respectively, the physical isolation characteristics of the substrate 260 can effectively shield electromagnetic interference. Specifically, the electromagnetic noise generated by the power module 230 is unlikely to penetrate the substrate 260 and affect the signal reception of the GNSS receiver module 220 on the other side, thus ensuring the purity of the positioning signal. Simultaneously, the modular, partitioned layout facilitates heat dissipation path planning. The heat generated by the power module 230 and the low-temperature requirements of the GNSS receiver module 220 are managed separately, avoiding mutual interference. Furthermore, the double-sided layout maximizes the space utilization of the substrate 260, allowing the power module 230, clock module 240, storage module 250, and RF front-end module to form independent functional areas with the GNSS receiver module 220 in vertical space. This simplifies module positioning during hardware maintenance and enhances the overall circuit's anti-interference capability and integrated reliability through a structured layout.

[0101] In the above embodiment, the storage module 250 is disposed in a first region of the first surface, wherein the first region is the projection area of ​​the GNSS receiver module 220 along the thickness direction of the substrate 260 on the first surface. This shortens the transmission distance between the storage module 250 and the GNSS receiver module 220, which is beneficial for improving the efficiency and stability of data transmission.

[0102] Furthermore, the storage module 250 includes a non-volatile memory cell 2510 (e.g., FLASH) and a dynamic random access memory cell 2520 (e.g., HyperRAM). Figure 4As shown, a non-volatile memory cell 2510 is disposed on the first side of the substrate 260. The non-volatile memory cell 2510 can be connected to the GNSS receiver module 220 by wire bonding and / or conductive lines. A dynamic random access memory cell 2520 is disposed on top of the non-volatile memory cell 2510. The dynamic random access memory cell 2520 is connected to the conductive lines by wire bonding, and then connected to the GNSS receiver module 220.

[0103] In practical applications, since the non-volatile memory unit 2510 needs to store more data information, the cross-sectional area of ​​the non-volatile memory unit 2510 is larger than that of the dynamic random access memory unit 2520. Therefore, the dynamic random access memory unit 2520 can be set on the top of the non-volatile memory unit 2510 by wire bonding, which saves the physical space occupied by the storage module 250 and allows it to be set close to the GNSS receiver module 220.

[0104] like Figure 4 As shown, the system-in-package (SoC) chip of the aforementioned vehicle-mounted GNSS receiver needs to be packaged based on substrate 260. Specifically, the RF front-end module 210, power module 230, clock module 240, and storage module 250 are packaged on the first side of substrate 260 through a first package 270, and the GNSS receiver module 220 is packaged on the second side of substrate 260 through a second package 280. Exemplarily, the first package 270 and the second package 280 can be plastic encapsulants, with the first package 270 and the second package 280 being plastic encapsulants located on the first and second sides, respectively. Exemplarily, the substrate 260 can be an organic IC substrate, which has advantages such as low dielectric constant, low mass density, simple processing technology, high production efficiency, and low cost, and can better meet the needs of miniaturization and micro-miniaturization of electronic devices.

[0105] like Figure 5 As shown, this utility model embodiment also provides a receiver for a satellite navigation system, which includes a single antenna 500 and a system-in-package (SIBP) chip for a vehicle-mounted GNSS receiver as described above. The single antenna 500 is connected to the first radio frequency (RF) input port 310 of the SIBP chip for the vehicle-mounted GNSS receiver, and the second RF input port 320 and the third RF input port 330 are connected externally to the chip.

[0106] The single antenna 500 is used to receive satellite navigation signals and convert them into electrical signals, providing a foundation for subsequent signal processing. Leveraging the advantages of its system-in-package (SiP) architecture, this vehicle-mounted GNSS receiver integrates multiple functional modules and possesses powerful signal processing capabilities.

[0107] When the single antenna 500 receives satellite navigation signals and converts them into electrical signals, these signals are transmitted through the connection line to the first RF input port 310 of the system-on-package (SoC) chip of the vehicle-mounted GNSS receiver. The RF front-end module 210 inside the SoC of the vehicle-mounted GNSS receiver performs preliminary processing on the input RF signals, including RF signal separation, amplification, and filtering. Since satellite signals are subject to various interferences and attenuation during transmission, these processing steps of the RF front-end module 210 effectively improve the signal quality and strength, making it more suitable for subsequent processing.

[0108] The radio frequency (RF) signal output from the RF front-end module 210 is input to the RF subsystem 2210. The baseband subsystem 2220 receives and processes the signal after it has been processed by the RF subsystem 2210, including signal acquisition, tracking, and message demodulation. When the signal input to the baseband subsystem 2220 is an analog signal, an analog-to-digital converter is also required for sampling.

[0109] The application processor subsystem 2230 inside the system-in-package chip of the vehicle-mounted GNSS receiver is used to schedule and configure the baseband subsystem 2220, and perform positioning, speed measurement and time synchronization processing based on the observations reported by the baseband subsystem 2220.

[0110] like Figure 6 As shown, this utility model embodiment also provides another satellite navigation system receiver, which includes a first antenna 510, a second antenna 520, a system-in-package chip of the vehicle-mounted GNSS receiver as described above, and a duplexer 600. The first antenna 510 is connected to the first radio frequency input port 310, the second antenna 520 is connected to the input terminal of the duplexer 600, and the two output terminals of the duplexer 600 are respectively connected to the third radio frequency input port 330 and the fourth radio frequency input port 340.

[0111] The first antenna 510 and the second antenna 520 are both used to receive satellite navigation signals and convert them into electrical signals, providing a foundation for subsequent signal processing. The system-in-package (SoC) chip of the vehicle-mounted GNSS receiver is the core processing unit of the entire receiver. Leveraging the advantages of SoC, it integrates multiple functional modules and possesses powerful signal processing capabilities.

[0112] The satellite navigation signal received by the first antenna 510 is divided into two frequency bands, MFH and LFL, by a duplexer inside the system-on-a-chip of the vehicle-mounted GNSS receiver. The satellite navigation signal received by the second antenna 520 is divided into two frequency bands, MFH and LFL, by a duplexer outside the system-on-a-chip of the vehicle-mounted GNSS receiver.

[0113] The radio frequency (RF) subsystem 2210 inside the system-in-package (SoC) of the vehicle-mounted GNSS receiver performs preliminary processing on the two sets of input signals (each set including signals from the MFH and LFL frequency bands), including RF signal amplification and filtering. Since satellite signals are subject to various interferences and attenuation during transmission, these processing steps of the RF subsystem 2210 effectively improve the signal quality and strength, making it more suitable for subsequent processing.

[0114] The baseband subsystem 2220 inside the system-in-package (SoC) of the vehicle-mounted GNSS receiver receives and processes the signal after it has been processed by the radio frequency (RF) subsystem 2210, including signal acquisition, tracking, and message demodulation. When the signal input to the baseband subsystem 2220 is an analog signal, an analog-to-digital converter is also required for sampling.

[0115] The application processor subsystem 2230 inside the system-in-package chip of the vehicle-mounted GNSS receiver is used to schedule and configure the baseband subsystem 2220, and perform positioning, speed measurement and time synchronization processing based on the observations reported by the baseband subsystem 2220.

[0116] like Figure 7 As shown, this utility model also provides a receiver for a satellite navigation system, which includes a first antenna 510, a second antenna 520, a duplexer 600, an RF switching switch 700, and a system-in-package chip for the aforementioned vehicle-mounted GNSS receiver. The RF switching switch 700 can selectively connect the second RF input port 320 and the third RF input port 330, or connect the third RF input port 330 and one output terminal of the duplexer 600, depending on the need to achieve single-antenna full-frequency positioning or dual-antenna tri-frequency positioning and orientation functions.

[0117] Specifically, when implementing the single-antenna full-frequency positioning function, the first antenna 510 is connected to the first radio frequency input port 310, and the second radio frequency input port 320 is connected to the third radio frequency input port 330 outside the chip through the radio frequency switching switch 700.

[0118] The tripeller separates the satellite navigation signal received by the first antenna 510 into radio frequency (RF) signals in the MFH, LFL, and LFH bands. The MFH band RF signal is input to the GNSS receiver module 220 through the tripeller's first output and first receiving channel; the LFL band RF signal is input to the GNSS receiver module 220 through the tripeller's second output and second receiving channel; and the LFH band RF signal is input to the GNSS receiver module 220 through the tripeller's third output, second RF input port 320, third RF input port 330, and third receiving channel. The GNSS receiver module 220 processes the received RF signals to achieve single-antenna full-band positioning.

[0119] When implementing the dual-antenna tri-frequency positioning and orientation function, the first antenna 510 is connected to the first RF input port 310, the second antenna 520 is connected to the input of the duplexer 600, one output of the duplexer 600 is connected to the third RF input port 330 through the RF switching switch 700, and the other output of the duplexer 600 is connected to the fourth RF input port 340.

[0120] The tripod separates the satellite navigation signal received by the first antenna 510 into radio frequency signals in the MFH, LFL, and LFH bands. The MFH band radio frequency signal is input into the GNSS receiver module 220 through the first output terminal and the first receiving channel of the tripod; the LFL band radio frequency signal is input into the GNSS receiver module 220 through the second output terminal and the second receiving channel of the tripod; the LFH band radio frequency signal is discarded and not further transmitted or processed.

[0121] The duplexer 600 separates the satellite navigation signals received by the second antenna 520 to obtain RF signals in the MFH and LFL bands. The MFH band RF signal is input to the GNSS receiver module 220 through the first output, third RF input port 330, and fourth receiving channel of the duplexer 600; the LFL band RF signal is input to the GNSS receiver module 220 through the second output, fourth RF input port, and fourth receiving channel of the duplexer. The GNSS receiver module 220 processes the received RF signals to achieve dual-antenna tri-frequency positioning and orientation.

[0122] By setting the RF switch 700, the third RF input port 330 can be selectively connected to the second RF input port 320 or the duplexer 600, thereby enabling the use of two antennas to switch between single-antenna full-frequency positioning and dual-antenna tri-frequency positioning and orientation functions. Specifically, when implementing the dual-antenna tri-frequency positioning and orientation function, the antenna used for the single-antenna full-frequency positioning function can be reused.

[0123] The receiver of this satellite navigation system utilizes two antennas and a system-in-package chip for a vehicle-mounted GNSS receiver to meet the needs of both single-antenna full-frequency positioning and dual-antenna tri-frequency positioning and orientation scenarios, thereby reducing hardware costs and shrinking the size and weight of the equipment. At the same time, the reduction in the number of antennas simplifies the system design complexity and reduces the difficulty of power consumption and electromagnetic compatibility design.

[0124] This utility model embodiment also provides a car that includes a receiver for a satellite navigation system as described above.

[0125] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0126] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Without departing from the basic principles of this utility model, any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details will be included within the scope of the claims of this utility model.

Claims

1. A system-in-package chip for a vehicle-mounted GNSS receiver, characterized in that, Includes the chip body and the outer and inner ring contacts at the bottom of the chip body; Viewed vertically from the bottom, the upper left area of ​​the bottom is the projection area of ​​the positioning mark on the chip body on the bottom. The outer ring contacts include the first to the fortieth contacts, which are evenly distributed clockwise on the four sides starting from the upper left area. The inner ring contacts include the first to the thirty-second contacts, which are evenly distributed clockwise on the four sides starting from the upper left area. The first, eleventh, twenty-third, twenty-fifth, twenty-seventh, thirtieth, and thirty-second contacts in the outer ring, and the fifth, eighteenth to twenty-fourth, and twenty-eighth contacts in the inner ring, are all ground terminals. The fifth contact in the outer ring and the twenty-ninth contact in the inner ring are both first power supply terminals. The sixth contact in the outer ring is used to connect to the seventh contact in the outer ring through an external inductor and capacitor, and the seventh contact is the second power supply terminal. The thirty-sixth contact in the outer ring is used to connect to the thirty-fifth contact in the outer ring through an external inductor and capacitor, and the thirty-fifth contact is the third power supply terminal. The twenty-sixth, twenty-eighth, twenty-ninth, and thirty-first contacts in the outer ring are four radio frequency input ports. The fortieth contact in the outer ring and the first contact in the inner ring are communication interfaces for wired communication with the host computer.

2. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 1, characterized in that, The chip body encapsulates a GNSS receiver module and an RF front-end module, and also encapsulates at least one of a power module, a clock module, and a storage module. The GNSS receiver module is connected to the power supply module, which converts the input voltage into the operating voltage of the GNSS receiver module; the GNSS receiver module is connected to the clock module, which provides a clock signal to the GNSS receiver module; and the GNSS receiver module interacts with the storage module. The radio frequency front-end module is connected to the radio frequency input port and the GNSS receiver module. The radio frequency front-end module is used to process the radio frequency signal received by the radio frequency input port and then input it into the GNSS receiver module. The GNSS receiver module is connected to the communication interface.

3. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 2, characterized in that, The radio frequency input port includes a first radio frequency input port, a second radio frequency input port, a third radio frequency input port, and a fourth radio frequency input port; The radio frequency front-end module includes a triplet, the input terminal of which is connected to a first radio frequency input port, the first and second output terminals of which are respectively connected to two receiving channels of the GNSS receiver module, and the third output terminal of which is connected to a second radio frequency input port. The third and fourth radio frequency input ports are respectively connected to the other two receiving channels of the GNSS receiver module.

4. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 3, characterized in that, The GNSS receiver module includes a radio frequency (RF) subsystem; the RF subsystem includes a first receiving channel, a second receiving channel, a third receiving channel, and a fourth receiving channel. The first receiving channel is connected to the first output terminal of the tripod, the second receiving channel is connected to the second output terminal of the tripod, the third receiving channel is connected to the third RF input port, and the fourth receiving channel is connected to the fourth RF input port.

5. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 4, characterized in that, The GNSS receiver module further includes a baseband subsystem and an application processor subsystem. The input of the baseband subsystem is connected to the radio frequency subsystem, and its output is connected to the application processor subsystem. The application processor subsystem is connected to a function control interface and the communication interface.

6. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 5, characterized in that, The functional control interface includes one or both of a time synchronization signal interface and a GPIO interface, and the communication interface includes a CAN interface, an Ethernet interface, a UART interface, an SPI interface, and an I / O interface. 2 One or more of the C interfaces.

7. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 3, characterized in that, The chip body includes a substrate, the substrate having a first side and a second side opposite to each other; The power module, clock module, storage module, and RF front-end module are all encapsulated on the first side of the substrate; The GNSS receiver module is encapsulated on the second side of the substrate; A conductive line is provided between the first surface and the second surface, and the power module, clock module, storage module and radio frequency front-end module are all connected to the GNSS receiver module through the conductive line.

8. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 7, characterized in that, The storage module is disposed in a first area of ​​the first surface, and the first area is the projection area of ​​the GNSS receiver module on the first surface along the thickness direction of the substrate.

9. The system-in-package chip for the vehicle-mounted GNSS receiver according to claim 8, characterized in that, The storage module includes: a dynamic random access memory unit and a non-volatile memory unit; The non-volatile memory cell is disposed on the first surface, and the dynamic random access memory cell is disposed on top of the non-volatile memory cell.

10. A receiver for a satellite navigation system, characterized in that, The system includes a single antenna and a system-in-package (SiP) chip for a vehicle-mounted GNSS receiver as described in any one of claims 3-9, wherein the single antenna is connected to the first radio frequency (RF) input port of the SiP chip for the vehicle-mounted GNSS receiver, and the second RF input port and the third RF input port are connected externally to the chip.

11. A receiver for a satellite navigation system, characterized in that, The system includes a first antenna, a second antenna, a duplexer, and a system-in-package chip for a vehicle-mounted GNSS receiver as described in any one of claims 3-9. The first antenna is connected to the first radio frequency input port, the second antenna is connected to the input of the duplexer, and the two outputs of the duplexer are respectively connected to the third radio frequency input port and the fourth radio frequency input port.

12. A receiver for a satellite navigation system, characterized in that, Includes a first antenna, a second antenna, a duplexer, an RF switching switch, and a system-in-package chip for a vehicle-mounted GNSS receiver as described in any one of claims 3-9; When implementing the single-antenna full-frequency positioning function, the first antenna is connected to the first radio frequency input port, and the second radio frequency input port is connected to the third radio frequency input port outside the chip through the radio frequency switching switch; When implementing the dual-antenna tri-frequency positioning and orientation function, the first antenna is connected to the first radio frequency input port, the second antenna is connected to the input of the duplexer, one output of the duplexer is connected to the third radio frequency input port through the radio frequency switching switch, and the other output of the duplexer is connected to the fourth radio frequency input port.

13. A car, characterized in that, Includes the receiver of the satellite navigation system as described in claim 10, 11, or 12.

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