Single-frequency GNSS (Global Navigation Satellite System) positioning module integrated with antenna

Abstract

The utility model belongs to the field of satellite navigation, and particularly relates to a single-frequency GNSS (Global Navigation Satellite System) positioning module integrated with an antenna, which is characterized by comprising an antenna module used for receiving Beidou satellite signals; the radio frequency signal amplification module is used for amplifying Beidou satellite signals, and a radio frequency matching circuit is arranged on the signal access module; the CPU is used for processing Beidou satellite signals, and the model of the CPU is BK1662NS; the interface module is used for being externally connected with a power supply so as to provide power for the CPU; the antenna module is connected with the radio frequency signal amplification module, the radio frequency signal amplification module is connected with the CPU through a radio frequency matching circuit, and the interface module is connected with the CPU. According to the utility model, a Beidou satellite signal is received by the antenna module, amplified by the radio frequency signal amplification module, and then enters the CPU for processing through one radio frequency matching circuit; namely, the positioning module can be suitable for Beidou satellite signal processing, and positioning information can be provided more stably.

Description

Technical Field

[0001] The utility model belongs to the field of satellite navigation, and particularly relates to a GNSS module. Background Art

[0002] The GNSS global satellite navigation system is mainly used in the fields of space positioning and position navigation, and is an important information guarantee for the economic and social development. With the development of society and economy, the satellite navigation system is increasingly penetrating into society and people's lives. In traditional fields such as transportation, agriculture, forestry, animal husbandry and fishery, and electric power energy, the integrated application is continuously deepened, the scale is continuously expanded, the effect is more remarkable, and it is developing in depth into the markets of railway transportation, inland waterway shipping, ocean navigation, air transportation and traffic infrastructure construction management. In addition, in emerging application fields such as industrial Internet, Internet of Things, and Internet of Vehicles, fields such as autonomous driving, automatic parking, and automatic logistics are continuously developing, and economic benefits are gradually emerging.

[0003] In the GNSS global satellite navigation system, the Beidou satellite navigation system (BDS) is a satellite navigation system independently developed by China, with the characteristics of high precision, high reliability, high coverage, etc.; in order to ensure the stable reception of positioning signals, a GNSS positioning module that can adapt to and support pure Beidou is required. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a single-frequency GNSS positioning module integrated with an antenna, which can be applied to Beidou satellite signal processing and can provide positioning information more stably.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows.

[0006] A single-frequency GNSS positioning module integrated with an antenna, characterized in that it includes:

[0007] An antenna module for receiving Beidou satellite signals;

[0008] A radio frequency signal amplification module for amplifying Beidou satellite signals, and a radio frequency matching circuit is provided on the signal access module;

[0009] A CPU for processing Beidou satellite signals, and the CPU model is BK1662NS;

[0010] An interface module for externally connecting a power supply to supply power to the CPU;

[0011] A voltage stabilizing module for outputting 3.3V voltage;

[0012] The antenna module is connected to the RF signal amplification module. The RF signal amplification module is connected to the CPU through a path of RF matching circuit. The interface module is connected to the voltage regulation module, and the voltage regulation module is connected to the CPU.

[0013] In this module, the Beidou satellite signal is received through the antenna module, amplified by the RF signal amplification module, and then enters the CPU for processing through a path of RF matching circuit. That is, this positioning module can be applied to the processing of Beidou satellite signals and can provide positioning information more stably.

[0014] Further, the RF signal amplification module includes a capacitor C21, an inductor L5, a low-noise amplifier U2, a capacitor C20, a filter SAW1, and a capacitor C4. The Beidou satellite signal is successively coupled by the capacitor C21, matched by the inductor L5, amplified by the low-noise amplifier U2, capacitively coupled by the capacitor C20, filtered by the filter SAW1, and coupled by the capacitor C4, and finally output to the CPU through a path of RF matching circuit.

[0015] Further, the RF matching circuit includes an inductor L1 and a capacitor C9.

[0016] Further, this module further includes a backup power supply circuit for providing capacitance to the CPU to maintain the warm start function. The backup power supply circuit is connected to both the CPU and the voltage regulation module.

[0017] Further, the backup power supply circuit includes a charging diode D2, a resistor R29, and a supercapacitor VBAT1.

[0018] Further, filter capacitors are also connected to the CPU.

[0019] Further, the filter capacitors include a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C14, a capacitor C7, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C18, and a capacitor C19.

[0020] Further, a power inductor L2 is also connected to the CPU.

[0021] Further, this module further includes a clock module, and the clock module is connected to the CPU.

[0022] Further, this module further includes an oscillation signal module, and the oscillation signal module is connected to the CPU.

[0023] In the present utility model, the Beidou satellite signal is received through the antenna module, amplified by the RF signal amplification module, and then enters the CPU for processing through a path of RF matching circuit. That is, this positioning module can be applied to the processing of Beidou satellite signals and can provide positioning information more stably. Description of the Drawings

[0024] Figure 1 is the circuit schematic diagram of the present utility model.

[0025] Figure 2 is the circuit schematic diagram of the CPU.

[0026] Figure 3 is the circuit schematic diagram of the voltage stabilizing module.

[0027] Figure 4 is the circuit schematic diagram of the backup power supply circuit.

[0028] Figure 5 is the circuit schematic diagram of the clock module.

[0029] Figure 6 is the circuit schematic diagram of the oscillation signal module.

[0030] Figure 7 is the circuit schematic diagram of the interface module.

[0031] Figure 8 is the circuit schematic diagram of the antenna module, radio frequency signal amplification module, and radio frequency matching circuit.

[0032] Figure 9 is the system framework diagram of the CPU. Detailed Embodiment

[0033] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] See Figures 1-9 , this embodiment provides a single-frequency GNSS positioning module integrated with an antenna, which is characterized in that it includes:

[0035] an antenna module for receiving Beidou satellite signals;

[0036] a radio frequency signal amplification module for amplifying Beidou satellite signals, and a radio frequency matching circuit is provided on the signal access module;

[0037] a CPU for processing Beidou satellite signals, and the CPU model is BK1662NS;

[0038] an interface module for connecting to an external power supply to provide power to the CPU;

[0039] a voltage stabilizing module for outputting 3.3V voltage;

[0040] The antenna module is connected to the RF signal amplification module. The RF signal amplification module is connected to the CPU through a path of RF matching circuit. The interface module is connected to the voltage regulation module, and the voltage regulation module is connected to the CPU.

[0041] The external power supply passes through the interface module. The input VCC power supply is output as 3.3V after passing through the voltage regulator U3 of the voltage regulation module and is supplied to the 17PIN of the CPU.

[0042] The antenna module includes a ceramic antenna of ANT118*18*4.

[0043] In this embodiment, the RF signal amplification module includes a capacitor C21, an inductor L5, a low-noise amplifier U2, a capacitor C20, a filter SAW1, and a capacitor C4. The Beidou satellite signal received by the ceramic antenna of ANT118*18*4 is successively coupled through the capacitor C21 (coupling capacitor), matched through the inductor L5 (matching inductor), amplified by the low-noise amplifier U2, capacitively coupled through the capacitor C20, filtered by the filter SAW1, and coupled through the capacitor C4, and finally output to the 32PIN of the CPU through a path of RF matching circuit.

[0044] In this embodiment, the RF matching circuit includes an inductor L1 and a capacitor C9.

[0045] In this embodiment, the module further includes a backup power supply circuit for providing a capacitor to the CPU to maintain the warm start function. The backup power supply circuit is connected to both the CPU and the voltage regulation module. The backup power supply circuit provides a capacitor to the RTC inside the BK1662NS to maintain the warm start function.

[0046] In this embodiment, the backup power supply circuit includes a charging diode D2, a resistor R29, and a supercapacitor VBAT1.

[0047] In this embodiment, filter capacitors are also connected to the CPU.

[0048] In this embodiment, the filter capacitors include capacitors C1, C2, C3, C14, C7, C10, C11, C12, C18, and C19.

[0049] In this embodiment, a power inductor L2 is also connected to the CPU.

[0050] In this embodiment, the module further includes a clock module, and the clock module is connected to the CPU.

[0051] In this embodiment, the module further includes an oscillation signal module, and the oscillation signal module is connected to the CPU.

[0052] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A single-frequency GNSS positioning module integrated with an antenna, characterized in that: Included are: Antenna module for receiving Beidou satellite signals; A radio frequency signal amplification module for amplifying Beidou satellite signals, wherein the signal access module is provided with a radio frequency matching circuit; A CPU for processing Beidou satellite signals, wherein the CPU model is BK1662NS; An interface module for connecting an external power supply to provide power to the CPU; Voltage regulator module for outputting 3.3V voltage; The antenna module is connected to the radio frequency signal amplification module, the radio frequency signal amplification module is connected to the CPU via a radio frequency matching circuit, the interface module is connected to the voltage stabilization module, and the voltage stabilization module is connected to the CPU.

2. A single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The RF signal amplification module includes capacitor C21, inductor L5, low noise amplifier U2, capacitor C20, filter SAW1, and capacitor C4. The Beidou satellite signal is sequentially coupled through capacitor C21, matched through inductor L5, amplified through low noise amplifier U2, coupled through capacitor C20, filtered through filter SAW1, coupled through capacitor C4, and finally output to the CPU through a RF matching circuit.

3. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The radio frequency matching circuit includes an inductor L1 and a capacitor C9.

4. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The module also includes a backup power supply circuit for providing capacitance to the CPU to maintain a hot start function, and the backup power supply circuit is connected to both the CPU and the voltage stabilizing module.

5. The single-frequency GNSS positioning module with integrated antenna according to claim 4, characterized in that: The backup power supply circuit includes a charging diode D2, a resistor R29, and a farad capacitor VBAT1.

6. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The CPU is also connected with a filter capacitor.

7. The single-frequency GNSS positioning module with integrated antenna according to claim 6, characterized in that: The filter capacitors include capacitor C1, capacitor C2, capacitor C3, capacitor C14, capacitor C7, capacitor C10, capacitor C11, capacitor C12, capacitor C18, and capacitor C19.

8. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The CPU is also connected to a power inductor L2.

9. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The module also includes a clock module, and the clock module is connected to the CPU.

10. The single-frequency GNSS positioning module with integrated antenna according to claim 1, characterized in that: The module also includes an oscillation signal module, and the oscillation signal module is connected to the CPU.

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