GNSS (Global Navigation Satellite System) module adaptive adjusting device and GNSS module system

Abstract

The embodiment of the utility model provides a GNSS module self-adaptive adjusting device and a GNSS module system, the GNSS module self-adaptive adjusting device comprises a control unit, a switch unit and a signal amplification unit, and the switch unit is provided with a receiving pin; an input pin of the control unit is connected with a sampling port of the GNSS antenna module, and an output pin of the control unit is connected with a receiving pin of the switch unit; under the condition that the sampling voltage of the sampling port of the GNSS antenna module is smaller than a first threshold value, the output pin of the control unit outputs a first level, and the first level enables the switch unit to be switched to a first path; when the sampling voltage of the sampling port of the GNSS antenna module is greater than a second threshold value, the output pin of the control unit outputs a second level, and the second level enables the switch unit to be switched to a second path; the first threshold is smaller than the second threshold, the first path passes through the signal amplification unit, and the second path does not pass through the signal amplification unit.

Description

Technical Field

[0001] This application relates to the field of antenna technology, specifically to a GNSS module adaptive adjustment device and a GNSS module system. Background Technology

[0002] A Global Navigation Satellite System (GNSS) module is an integrated module that includes a GNSS chip. This module does not include an antenna. By connecting the module system to an antenna, it is possible to receive radio frequency signals using the antenna and process the radio frequency signals using the GNSS chip to obtain positioning information.

[0003] Currently, the most commonly used antenna type is the passive antenna, therefore traditional GNSS module systems include a signal amplification unit. By connecting a passive antenna to the GNSS module system, the radio frequency (RF) signal received by the passive antenna can be amplified and then transmitted to the GNSS chip for processing to obtain positioning information. However, active antennas also exist, and active antennas also include signal amplification units. Connecting an active antenna to the GNSS module system results in the RF signal received by the active antenna undergoing amplification in both the active antenna and the GNSS module system. This double amplification causes the RF signal strength to exceed the receiving limit of the GNSS chip, leading to reduced efficiency or even inability to process the RF signal.

[0004] Therefore, there is an urgent need for a feasible solution that enables adaptive adjustment of the signal amplification unit within the GNSS module system, thereby allowing the GNSS module system to be connected and used with active or passive antennas, while ensuring the efficiency of the GNSS chip in processing radio frequency signals. Utility Model Content

[0005] This application provides a GNSS module adaptive adjustment device and a GNSS module system, enabling the GNSS module system to adapt to GNSS antenna modules with active antennas and GNSS antenna modules with passive antennas.

[0006] A first aspect of this application provides a GNSS module adaptive adjustment device comprising:

[0007] The system includes a control unit, a switching unit, and a signal amplification unit, wherein the switching unit is provided with a receiving pin;

[0008] The input pin of the control unit is connected to the sampling port of the GNSS antenna module, and the output pin of the control unit is connected to the receiving pin of the switching unit.

[0009] When the sampling voltage at the sampling port of the GNSS antenna module is less than a first threshold, the output pin of the control unit outputs a first level, which causes the switching unit to switch to the first path;

[0010] When the sampling voltage at the sampling port of the GNSS antenna module is greater than the second threshold, the output pin of the control unit outputs a second level, which causes the switching unit to switch to the second path; when the first threshold is less than the second threshold, the first path passes through the signal amplification unit, and the second path does not pass through the signal amplification unit.

[0011] Optionally, the switching unit includes a first moving contact, a first stationary contact, and a second stationary contact, wherein the first stationary contact is located on the first path, and the second stationary contact is located on the second path;

[0012] When the first moving contact is connected to the first stationary contact, the switching unit switches to the first path;

[0013] When the first moving contact is connected to the second stationary contact, the switching unit switches to the second path.

[0014] Optionally, the switching unit includes a first switching unit and a second switching unit; the output pins of the control unit are respectively connected to the receiving pins of the first switching unit and the receiving pins of the second switching unit.

[0015] The first level causes the first switching unit and the second switching unit to switch to the first path;

[0016] The second level causes the first switching unit and the second switching unit to switch to the second path.

[0017] Optionally, the first switching unit includes a second moving contact, a third stationary contact, and a fourth stationary contact, wherein the third stationary contact is located at one end of the first path, and the fourth stationary contact is located at one end of the second path;

[0018] The second switching unit includes a third moving contact, a fifth stationary contact, and a sixth stationary contact. The fifth stationary contact is located at the other end of the first path, and the sixth stationary contact is located at the other end of the second path.

[0019] When the second moving contact is connected to the third stationary contact, and the third moving contact is connected to the fifth stationary contact, the first switching unit and the second switching unit switch to the first path;

[0020] When the second moving contact is connected to the fourth stationary contact and the third moving contact is connected to the sixth stationary contact, the first switching unit and the second switching unit switch to the second path.

[0021] Optionally, the third stationary contact is connected to the input port of the signal amplification unit in the first path, and the fifth stationary contact is connected to the output port of the signal amplification unit in the first path.

[0022] Optionally, the fourth stationary contact is connected to the sixth stationary contact.

[0023] Optionally, the second path passes through an RF matching circuit;

[0024] The fourth stationary contact is connected to the input port of the RF matching circuit in the second path; the sixth stationary contact is connected to the output port of the RF matching circuit in the second path.

[0025] Optionally, the first switching unit and the second switching unit are switches capable of transmitting radio frequency signals.

[0026] Optionally, the first switching unit and the second switching unit are radio frequency switches.

[0027] A second aspect of this application provides a GNSS module system, the GNSS module system comprising: a signal receiving port, a first switching unit, a second switching unit, a control unit, a signal amplification unit, and a GNSS chip;

[0028] The first switching unit includes a second moving contact, a third stationary contact, and a fourth stationary contact. The third stationary contact is located at one end of the first path, and the fourth stationary contact is located at one end of the second path.

[0029] The second switching unit includes a third moving contact, a fifth stationary contact, and a sixth stationary contact. The fifth stationary contact is located at the other end of the first path, and the sixth stationary contact is located at the other end of the second path. The first path includes a path formed by the second moving contact of the first switching unit, the third stationary contact of the first switching unit, the signal amplification unit, the fifth stationary contact of the second switching unit, and the third moving contact of the second switching unit. The second path includes a path formed by the second moving contact of the first switching unit, the fourth stationary contact of the first switching unit, the sixth stationary contact of the second switching unit, and the third moving contact of the second switching unit.

[0030] The input pin of the control unit is connected to the sampling port of the GNSS antenna module, and the output pin of the control unit is connected to the receiving pin of the first switching unit and the receiving pin of the second switching unit, respectively.

[0031] When the sampling voltage at the sampling port of the GNSS antenna module is less than a first threshold, the output pin of the control unit outputs a first level. The first level causes the second moving contact to connect with the third stationary contact, and the third moving contact to connect with the fifth stationary contact, so that the first switching unit and the second switching unit switch to the first path.

[0032] When the sampling voltage at the sampling port of the GNSS antenna module is greater than the second threshold, the output pin of the control unit outputs a second level, which causes the second moving contact to connect with the fourth stationary contact and the third moving contact to connect with the sixth stationary contact, so that the first switching unit and the second switching unit switch to the second path; the first threshold is less than the second threshold;

[0033] The signal receiving port is connected to the second moving contact of the first switching unit, and the third moving contact of the second switching unit is connected to the input pin of the GNSS chip.

[0034] The signal receiving port receives the first radio frequency signal from the GNSS antenna module;

[0035] When the first switching unit and the second switching unit are switched to the first path, the first radio frequency signal passes through the first path to the GNSS chip;

[0036] When the first switching unit and the second switching unit are switched to the second path, the first radio frequency signal passes through the second path to the GNSS chip.

[0037] In this embodiment, the GNSS module adaptive adjustment device determines the antenna type of the GNSS antenna module connected to it by using the control unit 30 to determine the magnitude of the sampling voltage received at the input pin 31. If the sampling voltage is less than a first threshold, the GNSS module adaptive adjustment device determines that the antenna type of the GNSS antenna module is a passive antenna, and the signal strength of the radio frequency signal acquired by the passive antenna is lower than the signal strength of the radio frequency signal that the GNSS chip can process. The GNSS module adaptive adjustment device uses the control unit 30 to output a first level to the switching unit 40, causing the switching unit to switch to the first path. When the switching unit 40 receives the radio frequency signal received by the passive antenna, the radio frequency signal passes through the signal amplification unit 50, and the amplified radio frequency signal by the signal amplification unit 50 meets the signal strength requirements of the radio frequency signal that the GNSS chip can process.

[0038] When the sampling voltage exceeds the second threshold, the GNSS module adaptive adjustment device determines that the antenna type of the GNSS antenna module is an active antenna, and the signal strength of the radio frequency signal acquired by the active antenna meets the signal strength requirements of the radio frequency signal that the GNSS chip can process. The GNSS module adaptive adjustment device uses the control unit 30 to output a second level to the switching unit 40, causing the switching unit to switch to the second path. When the switching unit 40 receives the radio frequency signal received by the active antenna, the radio frequency signal does not pass through the signal amplification unit 50.

[0039] Through the above steps, the GNSS module adaptive adjustment device can use the control unit 30 to determine the antenna type of the GNSS antenna module, and control whether the path in the GNSS module adaptive adjustment device passes through the signal amplification unit 50 through the switching unit 40. Thus, when the antenna type is a passive antenna, the path in the GNSS module adaptive adjustment device passes through the signal amplification unit 50, and when the antenna type is an active antenna, the path in the GNSS module adaptive adjustment device does not pass through the signal amplification unit 50. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the structure of a GNSS antenna module with an active antenna type provided in this application embodiment;

[0042] Figure 2This application provides a schematic diagram of the structure of a GNSS antenna module with a passive antenna type.

[0043] Figure 3 A schematic diagram of the structure of a conventional GNSS module system provided in this application embodiment;

[0044] Figure 4 A schematic diagram of the structure of a GNSS module adaptive adjustment device provided in an embodiment of this application;

[0045] Figure 5 A schematic diagram of another GNSS module adaptive adjustment device provided in the embodiments of this application;

[0046] Figure 6 A schematic diagram of another GNSS module adaptive adjustment device provided in the embodiments of this application;

[0047] Figure 7 A schematic diagram of the structure of a GNSS module system provided in an embodiment of this application;

[0048] Figure 8 This is a schematic diagram of another GNSS module system provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0051] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0052] It should be understood that the signal strength of the radio frequency signal received by the receiving antenna in the GNSS antenna module is lower than the signal strength requirement of the radio frequency signal that the GNSS chip can process. Therefore, before using the GNSS chip to process the radio frequency signal, it is usually necessary to amplify the radio frequency signal received by the receiving antenna so that the signal strength of the amplified radio frequency signal meets the signal strength requirement, and then use the GNSS chip to process the amplified radio frequency signal.

[0053] Please see Figure 1 , Figure 1 This is a schematic diagram of a GNSS antenna module with an active antenna type, provided in an embodiment of this application. The GNSS antenna module with an active antenna type includes an active antenna, an external power supply module 11, a signal output port 12, a sampling port 13, a first anti-static circuit 14, a first radio frequency matching circuit 15, a first step-down circuit 16, an inductor L1, and a capacitor C2. The first anti-static circuit 14 includes a transient voltage suppressor (TVS) D1, the first radio frequency matching circuit 15 includes capacitors C1 and C3, inductors L2 and L3, and a resistor R3, and the first step-down circuit 16 includes resistors R1 and R2.

[0054] The active antenna is used to receive radio frequency signals from GNSS satellites. The active antenna includes a first pin, a second pin, and a third pin. The first pin outputs the received radio frequency signal, the second pin is grounded to prevent static electricity accumulation and interference in the active antenna, and the third pin receives power from the external power supply module 11.

[0055] The signal output port 12 is used to output the radio frequency signal received by the active antenna to the GNSS module system provided in the embodiments of this application.

[0056] Sampling port 13 is used to sample the voltage of the active antenna. Since there is an external power supply module 11 in the GNSS antenna module with active antenna type, and the external power supply module 11 supplies power to the active antenna, there is voltage in the active antenna. The voltage value sampled by sampling port 13 is greater than 0.

[0057] The first anti-static circuit 14 is used to guide the overvoltage caused by static electricity in the GNSS antenna module to the ground, thereby preventing the components in the GNSS antenna module from being damaged by static electricity.

[0058] The first radio frequency matching circuit 15 is used to reduce the loss of radio frequency signals transmitted in the GNSS antenna module and improve the integrity of radio frequency signals transmitted in the GNSS antenna module.

[0059] The first step-down circuit 16 is used to reduce the voltage acquired by the sampling port 13, so as to prevent the voltage acquired by the sampling port 13 from exceeding the input range of the sampling port 13.

[0060] Inductor L1 is used to filter the AC power output from external power supply module 11, so that the power supply from external power supply module 11 to GNSS antenna module is DC power.

[0061] Capacitor C2 is used to store redundant electrical energy of the external power supply module 11, and when the power supply of the external power supply module 11 is insufficient, the redundant electrical energy stored in capacitor C2 is used to power the GNSS antenna module.

[0062] The first pin of the active antenna is connected to one end of transient voltage suppressor D1 and one end of capacitor C3, respectively. The other end of transient voltage suppressor D1 is grounded. The other end of capacitor C3 is connected to one end of capacitor C1. The other end of capacitor C1 is connected to one end of resistor R3 and one end of inductor L2, respectively. The other end of inductor L2 is grounded. The other end of resistor R3 is connected to signal output port 12 and one end of inductor L3, respectively. The other end of inductor L3 is grounded. The second pin of the active antenna is grounded. The third pin of the active antenna is connected to one end of resistor R2 and one end of resistor R1, respectively. The other end of resistor R2 is connected to sampling port 13. The other end of resistor R1 is connected to one end of inductor L1, respectively. The other end of inductor L1 is connected to one end of capacitor C2 and external power supply module 11, respectively. The other end of capacitor C2 is grounded.

[0063] Optionally, the active antenna includes a signal amplification module, and an external power supply module supplies power to both the active antenna and the signal amplification module. After receiving a radio frequency (RF) signal, the active antenna can amplify the RF signal using the signal amplification module. The amplified RF signal is then transmitted to the signal output port 12 via the first pin of the active antenna.

[0064] Please see Figure 2 , Figure 2This is a schematic diagram of a GNSS antenna module with a passive antenna type, provided as an embodiment of this application. The GNSS antenna module with a passive antenna type includes a passive antenna, a signal output port 21 and a sampling port 22, a second anti-static circuit 23, a second radio frequency matching circuit 24, and a resistor R4. The second anti-static circuit 23 includes a transient voltage suppressor D2, and the second radio frequency matching circuit 24 includes capacitors C4 and C5, inductors L4 and L5, and a resistor R5.

[0065] The passive antenna is used to receive radio frequency (RF) signals from GNSS satellites. The passive antenna includes a first pin, a second pin, and a third pin. The first pin outputs the received RF signal, the second pin is grounded to prevent static electricity buildup and interference, and the third pin receives power. Since there is no power supply in a passive GNSS antenna module, the voltage received at the third pin is zero.

[0066] The signal output port 21 is used to output the radio frequency signal received by the passive antenna to the GNSS module system provided in the embodiments of this application.

[0067] Sampling port 22 is used to sample the voltage in the passive antenna. Since there is no power supply in the GNSS antenna module which is a passive antenna, there is no voltage in the passive antenna, and the voltage value sampled by sampling port 22 is 0.

[0068] The second anti-static circuit 23 is used to guide the overvoltage caused by static electricity in the GNSS antenna module to the ground, thereby preventing the components in the GNSS antenna module from being damaged by static electricity.

[0069] The second RF matching circuit 24 is used to reduce the loss of RF signals during transmission in the GNSS antenna module and improve the integrity of RF signals during transmission in the GNSS antenna module.

[0070] Resistor R4 is used to limit the current transmitted to sampling port 22 to prevent damage to sampling port 22 due to excessive current.

[0071] The first pin of the active antenna is connected to one end of transient voltage suppressor D2 and one end of capacitor C4, with the other end of transient voltage suppressor D2 grounded. The other end of capacitor C4 is connected to one end of capacitor C5, and the other end of capacitor C5 is connected to one end of inductor L4 and one end of resistor R5, with the other end of inductor L4 grounded. The other end of resistor R5 is connected to one end of inductor L5 and signal output port 21, with the other end of inductor L5 grounded. The second pin of the active antenna is grounded. The third pin of the active antenna is connected to one end of resistor R4, and the other end of resistor R4 is connected to sampling port 22.

[0072] Optionally, the first pin of the passive antenna in the second anti-static circuit is connected to one end of the transient voltage suppressor D2 and one end of the capacitor C4, respectively. The second and third pins of the passive antenna are grounded. The other end of the transient voltage suppressor D2 is grounded. The other end of the capacitor C4 is connected to one end of the capacitor C5. The other end of the capacitor C5 is connected to one end of the resistor R5 and one end of the inductor L4, respectively. The other end of the inductor L4 is grounded. The other end of the resistor R5 is connected to the signal output port 21 and one end of the inductor L5, respectively. The other end of the inductor L5 is grounded.

[0073] Since the commonly used antenna type is the passive antenna, and passive antennas do not include a signal amplification module, when connecting a passive GNSS antenna module to a traditional GNSS module system, the signal amplification module in the GNSS module is needed to amplify the radio frequency signal received by the GNSS antenna module before transmitting the amplified radio frequency signal to the GNSS chip in the traditional GNSS module system. Please refer to [link / reference]. Figure 3 , Figure 3 This is a schematic diagram of a conventional GNSS module system provided in an embodiment of this application. The conventional GNSS module system includes a signal input port, a signal amplification unit, and a GNSS chip. The signal input port is connected to one end of the signal amplification unit, and the other end of the signal amplification unit is connected to the GNSS chip. After receiving a radio frequency (RF) signal at the signal input port, the RF signal passes through the signal amplification unit and reaches the GNSS chip, where the GNSS chip processes the amplified RF signal. When a GNSS antenna module with an active antenna is connected to the conventional GNSS module system, and the RF signal received at the signal input port is the same RF signal received by the active antenna GNSS antenna module, the RF signal will pass through the signal amplification unit in the GNSS antenna module and the signal amplification unit in the GNSS module system. The signal strength of the RF signal after two amplifications exceeds the receiving limit of the GNSS chip, resulting in reduced efficiency or inability to process the RF signal by the GNSS chip.

[0074] Please see Figure 4 , Figure 4 This is a schematic diagram of a GNSS module adaptive adjustment device provided in an embodiment of this application. The device includes a control unit 30, a switching unit 40, and a signal amplification unit 50. The GNSS module system provided in this embodiment includes the aforementioned GNSS module adaptive adjustment device. The control unit 30 includes an input pin 31 and an output pin 32. The switching unit 40 includes a receiving pin 41. The output pin 32 of the control unit is connected to the receiving pin 41 of the switching unit 40.

[0075] When the sampling voltage received by the input pin 31 of the control unit 30 from the sampling port of the GNSS antenna module is less than the first threshold, the control unit 30 outputs a first level to the switching unit 40 through the output pin 32. The first level causes the switching unit 40 to switch to the first path, that is, the switching unit 40 connects to the first path and disconnects from the second path. The first path passes through the signal amplification unit 50.

[0076] When the sampling voltage received by the input pin 31 of the control unit 30 from the sampling port of the GNSS antenna module is greater than the second threshold, the control unit 30 outputs a second level to the switching unit 40 through the output pin 32. The second level causes the switching unit 40 to switch to the second path, that is, the switching unit 40 connects to the second path and disconnects from the first path. The first threshold is less than the second threshold, and the second path does not pass through the signal amplification unit 50.

[0077] In this embodiment, the GNSS module adaptive adjustment device determines the antenna type of the GNSS antenna module connected to it by using the control unit 30 to determine the magnitude of the sampling voltage received at the input pin 31. If the sampling voltage is less than a first threshold, the GNSS module adaptive adjustment device determines that the antenna type of the GNSS antenna module is a passive antenna, and the signal strength of the radio frequency signal acquired by the passive antenna is lower than the signal strength of the radio frequency signal that the GNSS chip can process. The GNSS module adaptive adjustment device uses the control unit 30 to output a first level to the switching unit 40, causing the switching unit to switch to the first path. When the switching unit 40 receives the radio frequency signal received by the passive antenna, the radio frequency signal passes through the signal amplification unit 50, and the amplified radio frequency signal by the signal amplification unit 50 meets the signal strength requirements of the radio frequency signal that the GNSS chip can process.

[0078] When the sampling voltage exceeds the second threshold, the GNSS module adaptive adjustment device determines that the antenna type of the GNSS antenna module is an active antenna, and the signal strength of the radio frequency signal acquired by the active antenna meets the signal strength requirements of the radio frequency signal that the GNSS chip can process. The GNSS module adaptive adjustment device uses the control unit 30 to output a second level to the switching unit 40, causing the switching unit to switch to the second path. When the switching unit 40 receives the radio frequency signal received by the active antenna, the radio frequency signal does not pass through the signal amplification unit 50.

[0079] Through the above steps, the GNSS module adaptive adjustment device can use the control unit 30 to determine the antenna type of the GNSS antenna module, and control whether the path in the GNSS module adaptive adjustment device passes through the signal amplification unit 50 through the switching unit 40. Thus, when the antenna type is a passive antenna, the path in the GNSS module adaptive adjustment device passes through the signal amplification unit 50, and when the antenna type is an active antenna, the path in the GNSS module adaptive adjustment device does not pass through the signal amplification unit 50.

[0080] Please see Figure 5 , Figure 5 This is a schematic diagram of another GNSS module adaptive adjustment device provided in an embodiment of this application. The device includes a control unit 30, a switching unit 40, and a signal amplification unit 50. The control unit 30 includes an input pin 31 and an output pin 32. The switching unit 40 includes a receiving pin 41, a first moving contact 42, a first stationary contact 43, and a second stationary contact 44. The first stationary contact 43 is located on a first path, and the second stationary contact 44 is located on a second path. The first path passes through the signal amplification unit 50, and the second path does not pass through the signal amplification unit 50.

[0081] The output pin 32 of the control unit 30 is connected to the receiving pin 41 of the switching unit 40. When the sampling voltage received by the input pin 31 of the control unit 30 from the sampling port of the GNSS antenna module is less than the first threshold, the control unit 30 outputs a first level to the switching unit 40 through the output pin 32. The first level causes the first moving contact 42 in the switching unit 40 to connect with the first stationary contact 43, that is, the switching unit 40 connects the first path and disconnects from the second path.

[0082] When the sampling voltage received by the input pin 31 of the control unit 30 from the sampling port of the GNSS antenna module is greater than the second threshold, the control unit 30 outputs a second level to the switching unit 40 through the output pin 32. The second level causes the first moving contact 42 in the switching unit 40 to connect with the second stationary contact 44, that is, the switching unit 40 connects the second path and disconnects from the first path.

[0083] Optionally, the first voltage level is less than the third threshold, and the second voltage level is greater than the fourth threshold, wherein the third threshold is less than the fourth threshold. When the switching unit 40 receives a voltage level less than the third threshold, the switching unit 40 switches to the first path. When the switching unit 40 receives a voltage level greater than the fourth threshold, the switching unit 40 switches to the second path.

[0084] Optionally, the signal amplification unit is a low noise amplifier (LNA).

[0085] Please see Figure 6 , Figure 6 This is a schematic diagram of another GNSS module adaptive adjustment device provided in an embodiment of this application. The device includes a control unit 30, a signal amplification unit 50, a first switching unit 60, and a second switching unit 70.

[0086] The control unit 30 includes an input pin 31 and an output pin 32. The first switching unit 60 includes a receiving pin 61, a second moving contact 62, a third stationary contact 63, and a fourth stationary contact 64. The second switching unit 70 includes a receiving pin 71, a third moving contact 72, a fifth stationary contact 73, and a sixth stationary contact 74. The output pin 32 of the control unit 30 is connected to the receiving pin 61 of the first switching unit 60 and the receiving pin 71 of the second switching unit 70, respectively. The fourth stationary contact 64 and the sixth stationary contact 74 are connected. The third stationary contact 63 is connected to one end of the signal amplification unit 50, and the other end of the signal amplification unit 50 is connected to the fifth stationary contact 73.

[0087] When the sampling voltage of the GNSS antenna module's sampling port received by the input pin 31 of the control unit 30 is less than the first threshold, the control unit 30 outputs a first level to the first switching unit 60 and the second switching unit 70 through the output pin 32. The first level causes the second moving contact 62 to connect with the third stationary contact 63 and the third moving contact 72 to connect with the fifth stationary contact 73. The first switching unit 60 and the second switching unit 70 switch to the first path, that is, both the first switching unit 60 and the second switching unit 70 are connected to the first path and disconnected from the second path.

[0088] When the sampling voltage received by the input pin 31 of the control unit 30 at the sampling port of the GNSS antenna module is greater than the second threshold, the control unit 30 outputs a second level to the first switching unit 60 and the second switching unit 70 through the output pin 32. The second level causes the second moving contact 62 to connect with the fourth stationary contact 64 and the third moving contact 72 to connect with the sixth stationary contact 74. The first switching unit 60 and the second switching unit 70 switch to the second path, that is, both the first switching unit 60 and the second switching unit 70 are connected to the second path and disconnected from the first path.

[0089] In this embodiment of the application, the GNSS module adaptive adjustment device switches to the first path or the second path by controlling the first switch unit 60 and the second switch unit 70, so that there are no circuit branches in the circuit of the GNSS module adaptive adjustment device, thereby avoiding the radio frequency signal from encountering circuit branches in the circuit of the GNSS module adaptive adjustment device and causing the radio frequency signal strength to attenuate.

[0090] Optionally, the third stationary contact 63 is connected to the input port of the signal amplification unit 50, and the fifth stationary contact 73 is connected to the output port of the signal amplification unit 50.

[0091] The input port of the signal amplification unit 50 is used to receive radio frequency signals, and the output interface of the signal amplification unit 50 is used to output the amplified radio frequency signals.

[0092] Optionally, the GNSS adaptive adjustment device also includes a radio frequency matching circuit.

[0093] The fourth stationary contact 64 is connected to one end of the RF matching circuit, and the sixth stationary contact 74 is connected to the other end of the RF matching circuit. The RF matching circuit is used to reduce the loss of RF signal transmission in the second path and improve the integrity of RF signal transmission in the second path.

[0094] Optionally, both the first and second switching units are switches capable of transmitting radio frequency signals.

[0095] The frequency bands of the first switching unit and the second transmittable radio frequency signal include the frequency bands of GNSS radio frequency signals.

[0096] Optionally, the first and second switching units are radio frequency switches.

[0097] Please see Figure 7 , Figure 7 This is a schematic diagram of a GNSS module system provided in an embodiment of the application. The GNSS module system includes a control unit 30, a signal amplification unit 50, a first switching unit 60, a second switching unit 70, a signal receiving port 80, and a GNSS chip 90. The signal receiving port 80 is used to receive the radio frequency signal output by the GNSS antenna module. The GNSS chip 90 is used to process the radio frequency signal output by the GNSS antenna module.

[0098] The control unit 30 includes an input pin 31 and an output pin 32. The first switching unit 60 includes a receiving pin 61, a second moving contact 62, a third stationary contact 63, and a fourth stationary contact 64. The second switching unit 70 includes a receiving pin 71, a third moving contact 72, a fifth stationary contact 73, and a sixth stationary contact 74. The GNSS chip 90 includes an input pin 91.

[0099] The output pin 32 of the control unit 30 is connected to the receiving pin 61 of the first switching unit 60 and the receiving pin 71 of the second switching unit 70, respectively. The second moving contact 62 is connected to the signal receiving port 80. The third moving contact 72 is connected to the input pin 91 of the GNSS chip 90. The third stationary contact 63 is connected to one end of the signal amplification unit 50, and the other end of the signal amplification unit 50 is connected to the fifth stationary contact 73. The fourth stationary contact 64 is connected to the sixth stationary contact 74.

[0100] When the sampling voltage of the GNSS antenna module's sampling port received by the input pin 31 of the control unit 30 is less than the first threshold, the control unit 30 outputs a first level to the first switching unit 60 and the second switching unit 70 through the output pin 32. The first level causes the second moving contact 62 to connect with the third stationary contact 63 and the third moving contact 72 to connect with the fifth stationary contact 73. The first switching unit 60 and the second switching unit 70 switch to the first path, that is, both the first switching unit 60 and the second switching unit 70 are connected to the first path and disconnected from the second path.

[0101] When the sampling voltage received by the input pin 31 of the control unit 30 at the sampling port of the GNSS antenna module is greater than the second threshold, the control unit 30 outputs a second level to the first switching unit 60 and the second switching unit 70 through the output pin 32. The second level causes the second moving contact 62 to connect with the fourth stationary contact 64 and the third moving contact 72 to connect with the sixth stationary contact 74. The first switching unit 60 and the second switching unit 70 switch to the second path, that is, both the first switching unit 60 and the second switching unit 70 are connected to the second path and disconnected from the first path.

[0102] Signal receiving port 80 receives the first radio frequency signal from the GNSS antenna module.

[0103] When the first switching unit 60 and the second switching unit 70 are switched to the first path, the antenna type of the GNSS antenna module connected to the GNSS module system is a passive antenna. Since the passive antenna does not include a signal amplification module, the signal strength of the first radio frequency signal transmitted to the signal receiving port 80 by the passive antenna is lower than the signal strength requirement of the radio frequency signal that the GNSS chip 90 can process. The first radio frequency signal reaches the GNSS chip 90 through the first path, which includes a path formed by the second moving contact 62, the third stationary contact 63, the signal amplification unit 50, the fifth stationary contact 73, and the third moving contact 72. Because the first path includes the signal amplification unit 50, the signal strength of the first radio frequency signal is amplified after passing through the signal amplification unit 50. Therefore, the signal of the first radio frequency signal received by the GNSS chip meets the signal strength requirement of the radio frequency signal that the GNSS chip 90 can process.

[0104] When the first switching unit 60 and the second switching unit 70 are switched to the second path, the antenna type of the GNSS antenna module connected to the GNSS module system is an active antenna. The active antenna includes a signal amplification module. Therefore, the signal strength of the first radio frequency signal transmitted by the active antenna to the signal receiving port 80 meets the signal strength requirements of the radio frequency signal that the GNSS chip 90 can process. The first radio frequency signal reaches the GNSS chip 90 through the second path, which includes a path formed by the second moving contact 62, the fourth stationary contact 64, the sixth stationary contact 74, and the third moving contact 72. Since the signal strength of the first radio frequency signal meets the signal strength requirements of the radio frequency signal that the GNSS chip 90 can process, it does not need to pass through the signal amplification unit 50.

[0105] In this embodiment, the GNSS module system can use the control unit 30 to determine the antenna type of the GNSS antenna module, and control whether the first radio frequency signal passes through the signal amplification unit 50 in the GNSS module system through the first switching unit 60 and the second switching unit 70. This ensures that when the antenna type is a passive antenna, the GNSS module system controls the first radio frequency signal to pass through a first path including the signal amplification unit 50. The signal strength of the first radio frequency signal received through the signal receiving port 80 from the passive antenna is low; therefore, it is amplified by the signal amplification unit 50 so that the amplified first radio frequency signal's signal strength meets the signal strength requirements of the radio frequency signals that the GNSS chip can process. When the antenna type is an active antenna, the GNSS module system controls the first radio frequency signal to pass through a second path that does not include the signal amplification unit 50. The signal strength of the first radio frequency signal received through the signal receiving port 80 from the active antenna already meets the signal strength requirements of the radio frequency signals that the GNSS chip can process; therefore, the first radio frequency signal does not need to pass through the signal amplification unit 50 for the GNSS chip to process.

[0106] Please see Figure 8 , Figure 8 The following is a schematic diagram of another GNSS module system provided in the application embodiment. The GNSS module system includes a control unit 30, a signal amplification unit 50, a first switching unit 60, a second switching unit 70, a signal receiving port 80, a GNSS chip 90, a filtering circuit 100, a third radio frequency matching circuit 110, a fourth radio frequency matching circuit 120, a fifth radio frequency matching circuit 130, a sixth radio frequency matching circuit 140, a seventh radio frequency matching circuit 150, and an eighth radio frequency matching circuit 160.

[0107] The control unit 30 includes an input pin 31 and an output pin 32.

[0108] The first switching unit 60 includes a receiving pin 61, a second moving contact 62, a third stationary contact 63, a fourth stationary contact 64, a power supply pin 65, and a ground pin 66. The ground pin 66 is grounded to maintain the stability of the circuit in the first switching unit 60. The power supply pin 65 is connected to a first power supply, which supplies power to the first switching unit 60.

[0109] The second switching unit 70 includes a receiving pin 71, a third moving contact 72, a fifth stationary contact 73, a sixth stationary contact 74, a power supply pin 75, and a ground pin 76. The ground pin 76 is grounded to maintain the stability of the circuit in the second switching unit 70. The power supply pin 76 is connected to a second power supply, which supplies power to the second switching unit 70.

[0110] The signal amplification unit 50 includes an input port 51, an output port 52, an enable pin 53, a power pin 54, a ground pin 55, and a ground pin 56. The input port 51 receives radio frequency (RF) signals, the output port 52 outputs amplified RF signals, and the enable pin 53 receives an activation level signal to activate the signal amplification unit 50. For example, if the level signal received by the enable pin 53 is not an activation level signal, the signal amplification unit 50 is not activated; if the received level signal is an activation level signal, the signal amplification unit 50 is activated. Ground pins 55 and 56 are grounded to provide a stable electrical reference potential for the signal amplification unit 50, ensuring the normal operation of the circuitry within the signal amplification unit 50. Power pin 54 is connected to a third power supply, which is used to power the signal amplification unit 50. Power pin 54 is also connected to one end of capacitor C6, and the other end of capacitor C6 is grounded. Capacitor C6 is connected in parallel with the third power supply. Capacitor C6 is used to store redundant electrical energy released by the third power supply. When the power consumption of the signal amplification unit 50 increases, the redundant electrical energy stored in capacitor C6 can be used to power the signal amplification unit 50.

[0111] The GNSS chip 90 includes an input pin 91.

[0112] The filter circuit 100 is used to filter signals within the frequency band of the radio frequency signals that the GNSS chip 90 can process. The filter circuit 100 includes an input pin 101, an output pin 102, a ground pin 103, a ground pin 104, and a ground pin 105. The input pin 101 is used to receive the radio frequency signal, the output pin 102 is used to output the filtered radio frequency signal, and the ground pins 103, 104, and 105 are grounded to reduce noise and interference in the filter circuit 100 and improve its filtering effect.

[0113] The third RF matching circuit 110 is located on the path formed by the signal receiving port 80 and the filter circuit 100 to reduce the transmission loss of the RF signal in the aforementioned path and improve the integrity of the RF signal transmission in the aforementioned path. The third RF matching circuit 110 includes inductors L6 and L7.

[0114] The fourth RF matching circuit 120 is located on the path formed by the filter circuit 100 and the first switching unit 60 to reduce the transmission loss of the RF signal in the path and improve the integrity of the RF signal transmission in the path. The fourth RF matching circuit 120 includes an inductor L8 and a capacitor C7.

[0115] The fifth RF matching circuit 130 is located on the path formed by the first switching unit 60 and the signal amplification unit 50 to reduce the transmission loss of the RF signal in the aforementioned path and improve the integrity of the RF signal transmission in the aforementioned path. The fifth RF matching circuit 130 includes an inductor L9 and a capacitor C8.

[0116] The sixth RF matching circuit 140 is located on the path formed by the signal amplification unit 50 and the second switching unit 70 to reduce the transmission loss of the RF signal in the path and improve the integrity of the RF signal transmission in the path. The sixth RF matching circuit 140 includes inductors L10 and L11.

[0117] The seventh RF matching circuit 150 is located on the path formed by the first switching unit 60 and the second switching unit 70 to reduce the transmission loss of the RF signal in the path and improve the integrity of the RF signal transmission in the path. The seventh RF matching circuit 150 includes an inductor L12 and a capacitor C9.

[0118] The eighth RF matching circuit 160 is located on the path formed by the second switching unit 70 and the GNSS chip 90 to reduce the transmission loss of the RF signal in the path and improve the integrity of the RF signal transmission in the path. The eighth RF matching circuit 160 includes an inductor L13 and a capacitor C10.

[0119] The output pin 32 of the control unit 30 is connected to the receiving pin 61 and the receiving pin 71, respectively. The signal receiving port 80 is connected to one end of the inductor L6 and one end of the inductor L7 in the third RF matching circuit 110, respectively. The other end of the inductor L7 is grounded. The other end of the inductor L6 is connected to the input pin 101 of the filter circuit 100. The output pin 102 of the filter circuit 100 is connected to one end of the inductor L8 and one end of the capacitor C7 in the fourth RF matching circuit 120, respectively. The other end of the inductor L8 is grounded. The other end of the capacitor C7 is connected to the second moving contact 62. The third stationary contact 63 is connected to one end of capacitor C8 in the fifth RF matching circuit. The other end of capacitor C8 is connected to one end of inductor L9 in the fifth RF matching circuit and the input port 51 of signal amplification unit 50. The other end of inductor L9 is grounded. The output port 52 of signal amplification unit 50 is connected to one end of inductor L10 and one end of inductor L11 in the sixth RF matching circuit 140. The other end of inductor L10 is grounded. The other end of inductor L11 is connected to the fifth stationary contact 73 of the second switching unit 70. The fourth stationary contact 64 of the first switching unit 60 is connected to one end of inductor L12 and one end of capacitor C9 in the seventh RF matching circuit 150. The other end of inductor L12 is grounded. The other end of capacitor C9 is connected to the sixth stationary contact 74 of the second switching unit 70. The third moving contact 72 of the second switching unit 70 is connected to one end of the capacitor C10 in the eighth RF matching circuit 160 and one end of the inductor L13 in the eighth RF matching circuit 160, respectively. The other end of the capacitor C10 is grounded and the other end of the inductor L13 is connected to the input pin 91 of the GNSS chip 90.

[0120] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. It should be understood that the disclosed apparatus can be implemented in other ways based on the embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative.

[0121] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A GNSS module adaptive adjustment device, characterized in that, The GNSS module adaptive adjusting device comprises: a control unit, a switch unit and a signal amplification unit, the switch unit is provided with a receiving pin; an input pin of the control unit is connected with a sampling port of a GNSS antenna module, an output pin of the control unit is connected with the receiving pin of the switch unit; in the case that a sampling voltage of the sampling port of the GNSS antenna module is less than a first threshold value, the output pin of the control unit outputs a first level, the first level makes the switch unit switch to a first path; in the case that the sampling voltage of the sampling port of the GNSS antenna module is greater than a second threshold value, the output pin of the control unit outputs a second level, the second level makes the switch unit switch to a second path; the first threshold value is less than the second threshold value, the first path passes through the signal amplification unit, and the second path does not pass through the signal amplification unit.

2. The GNSS module adaptive adjustment apparatus according to claim 1, wherein, The switch unit comprises a first movable contact, a first fixed contact and a second fixed contact, the first fixed contact is located on the first path, and the second fixed contact is located on the second path; in the case that the first movable contact is connected with the first fixed contact, the switch unit switches to the first path; in the case that the first movable contact is connected with the second fixed contact, the switch unit switches to the second path.

3. The GNSS module adaptive adjustment apparatus according to claim 1, wherein The switch unit comprises a first switch unit and a second switch unit; the output pin of the control unit is connected with the receiving pin of the first switch unit and the receiving pin of the second switch unit respectively; the first level makes the first switch unit and the second switch unit switch to the first path; the second level makes the first switch unit and the second switch unit switch to the second path.

4. The GNSS module adaptive adjustment apparatus according to claim 3, wherein The first switch unit comprises a second movable contact, a third fixed contact and a fourth fixed contact, the third fixed contact is located at one end of the first path, and the fourth fixed contact is located at one end of the second path; The second switch unit comprises a third movable contact, a fifth fixed contact and a sixth fixed contact, the fifth fixed contact is located at the other end of the first path, and the sixth fixed contact is located at the other end of the second path; in the case that the second movable contact is connected with the third fixed contact and the third movable contact is connected with the fifth fixed contact, the first switch unit and the second switch unit switch to the first path; in the case that the second movable contact is connected with the fourth fixed contact and the third movable contact is connected with the sixth fixed contact, the first switch unit and the second switch unit switch to the second path.

5. The GNSS module adaptive adjustment apparatus according to claim 4, wherein, The third fixed contact is connected with an input port of the signal amplification unit in the first path, and the fifth fixed contact is connected with an output port of the signal amplification unit in the first path.

6. The GNSS module adaptive adjustment apparatus according to claim 4, wherein The fourth fixed contact is connected with the sixth fixed contact.

7. The GNSS module adaptive adjustment apparatus according to claim 4, wherein The second path passes through a radio frequency matching circuit; The fourth stationary contact is connected with an input port of the radio frequency matching circuit in the second channel; and the sixth stationary contact is connected with an output port of the radio frequency matching circuit in the second channel.

8. The GNSS module adaptive adjustment apparatus according to any one of claims 3 to 6, characterized by, The first switch unit and the second switch unit are switches capable of transmitting radio frequency signals.

9. The GNSS module adaptive adjustment apparatus according to any one of claims 3 to 6, characterized by, The first switch unit and the second switch unit are radio frequency switches.

10. A GNSS module system, characterized in that The GNSS module system comprises a signal receiving port, a first switch unit, a second switch unit, a control unit, a signal amplification unit and a GNSS chip. The first switch unit comprises a second movable contact, a third stationary contact and a fourth stationary contact, the third stationary contact is located at one end of a first channel, and the fourth stationary contact is located at one end of a second channel. The second switch unit comprises a third movable contact, a fifth stationary contact and a sixth stationary contact, the fifth stationary contact is located at the other end of the first channel, and the sixth stationary contact is located at the other end of the second channel; the first channel comprises a channel formed by the second movable contact of the first switch unit, the third stationary contact of the first switch unit, the signal amplification unit, the fifth stationary contact of the second switch unit and the third movable contact of the second switch unit; and the second channel comprises a channel formed by the second movable contact of the first switch unit, the fourth stationary contact of the first switch unit, the sixth stationary contact of the second switch unit and the third movable contact of the second switch unit. An input pin of the control unit is connected with a sampling port of a GNSS antenna module, and output pins of the control unit are respectively connected with a receiving pin of the first switch unit and a receiving pin of the second switch unit. In a case where a sampling voltage of the sampling port of the GNSS antenna module is less than a first threshold value, the output pins of the control unit output a first level, the first level makes the second movable contact connected with the third stationary contact, and the third stationary contact connected with the fifth stationary contact, so as to make the first switch unit and the second switch unit switched to the first channel. In a case where the sampling voltage of the sampling port of the GNSS antenna module is greater than a second threshold value, the output pins of the control unit output a second level, the second level makes the second movable contact connected with the fourth stationary contact, and the third movable contact connected with the sixth stationary contact, so as to make the first switch unit and the second switch unit switched to the second channel; the first threshold value is less than the second threshold value. The signal receiving port is connected with the second movable contact of the first switch unit, and the third movable contact of the second switch unit is connected with an input pin of the GNSS chip. The signal receiving port receives a first radio frequency signal of the GNSS antenna module. In a case where the first switch unit and the second switch unit are switched to the first channel, the first radio frequency signal passes through the first channel to the GNSS chip. In a case where the first switch unit and the second switch unit are switched to the second channel, the first radio frequency signal passes through the second channel to the GNSS chip.

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