Dual-band co-fed antenna system compatible with DMR and RTK high-precision positioning

Abstract

The invention provides a dual-band co-fed antenna system compatible with DMR and RTK high-precision positioning, and belongs to the technical field of antennas. Comprising a dual-band antenna unit, a feed network unit and a signal processing unit, the dual-band antenna unit adopts a composite structure design and comprises a first radiator used for receiving and transmitting DMR frequency band signals and a second radiator used for receiving and transmitting RTK frequency band signals; the feed network unit is connected with the dual-band antenna unit and the signal processing unit and comprises a power distributor / synthesizer, an impedance matching circuit and a filter; the signal processing unit comprises a DMR signal processing module and an RTK signal processing module. The dual-band co-fed antenna system provided by the invention is high in integration level, low in cost, strong in signal processing capability and excellent in communication and positioning performance.

Description

Technical Field

[0001] The present invention provides a dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning, belonging to the field of antenna technology. Background Art

[0002] With the widespread adoption of modern communication and positioning technologies, numerous industries, such as surveying and mapping, logistics, and agriculture, are urgently demanding equipment that combines reliable communication with high-precision positioning capabilities. Traditionally, DMR communication antennas and RTK positioning antennas are often configured independently. From a device integration perspective, independently configuring both antennas significantly increases device size. For example, in handheld surveying and mapping equipment, the volume can increase by approximately 30%-40%. This not only increases the operator's burden but also limits the device's portability and usage scenarios. Furthermore, according to industry statistics, equipping both antennas separately can increase equipment production costs by 20%-30%, increasing procurement and operating costs for businesses.

[0003] More critically, in actual use, independent antennas are highly susceptible to mutual interference during signal transmission. In complex electromagnetic environments, DMR and RTK band signals can easily interfere with each other, severely degrading communication quality and causing issues such as unclear voice and communication interruptions. This can also significantly impact RTK positioning accuracy, with positioning errors potentially increasing from a few centimeters to tens of centimeters or even worse. For example, in densely populated urban areas, independent antenna systems often experience communication delays and positioning drift, severely hindering the efficient execution of related work. Therefore, the development of an antenna system that integrates DMR communication and RTK positioning functions, reducing equipment size and cost, and minimizing signal interference is urgently needed.

[0004] Based on the above, the inventors discovered that existing independently configured DMR communication antennas and RTK positioning antennas suffer from low integration, high cost, and severe signal interference. Therefore, they investigated and improved existing antenna structures, proposing a dual-band co-feed antenna system compatible with both DMR and RTK high-precision positioning to address these issues. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the problems of large equipment size, high cost, severe signal interference, and poor communication and positioning performance caused by the independent setting of the existing DMR communication antenna and RTK positioning antenna, and provide a dual-band co-fed antenna system with high integration, low cost, strong signal processing capability, and excellent communication and positioning performance.

[0006] In order to solve the above problems, the present invention proposes a technical solution: a dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning, including a dual-band antenna unit, a feeding network unit, and a signal processing unit. The dual-band antenna unit adopts a composite structure design and includes a first radiator for receiving and transmitting DMR band signals and a second radiator for receiving and transmitting RTK band signals; the feeding network unit connects the dual-band antenna unit and the signal processing unit and includes a power divider / combiner, an impedance matching circuit, and a filter; the signal processing unit includes a DMR signal processing module and an RTK signal processing module.

[0007] Furthermore, the first radiator is a planar inverted F antenna (PIFA) structure, the second radiator is a microstrip patch antenna structure, and the first radiator and the second radiator are spatially coupled to each other.

[0008] Furthermore, the power divider / combiner is used to distribute the transmission signal from the signal processing unit to the first radiator and the second radiator of the dual-band antenna unit in proportion, and to combine the signals received by the first radiator and the second radiator and transmit them to the signal processing unit.

[0009] Furthermore, the impedance matching circuit is used to adjust the impedance between the dual-band antenna unit and the feeder, so that the antenna can achieve a good impedance matching state in both the DMR band and the RTK band.

[0010] Furthermore, the filter includes a DMR frequency band filter and an RTK frequency band filter, which are respectively used to filter the DMR frequency band signal and the RTK frequency band signal to suppress out-of-band interference.

[0011] Furthermore, the DMR signal processing module is used to perform modulation and encoding processing on the transmission signal of the DMR frequency band, and to perform demodulation and decoding processing on the received signal.

[0012] Furthermore, the RTK signal processing module is used to capture, track, measure and position the satellite signals in the RTK frequency band.

[0013] Furthermore, the DMR signal processing module and the RTK signal processing module exchange data with external devices through a data interface.

[0014] Furthermore, the first radiator and the second radiator of the dual-band antenna unit are made of a specific metal material with low resistance, high conductivity and good corrosion resistance, so as to improve the signal radiation and reception performance and service life of the antenna in different working environments.

[0015] Furthermore, the DMR signal processing module and RTK signal processing module in the signal processing unit adopt an adaptive data processing algorithm, which can adjust processing parameters in real time according to signal strength, interference conditions, etc., to optimize DMR communication quality and RTK positioning accuracy.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning of the present invention are as follows:

[0017] 1. The present invention integrates the DMR communication antenna and the RTK positioning antenna into one, which effectively reduces the equipment space occupied, reduces production costs, and improves product market competitiveness compared to traditional independent configurations.

[0018] 2. The present invention accurately distributes signals through a power divider / synthesizer, optimizes impedance through an impedance matching circuit, and suppresses interference through a filter, thereby ensuring clear communication voice, accurate positioning, and reducing signal crosstalk and errors.

[0019] 3. The present invention adopts the application of specific metal materials and adaptive data processing algorithms to reduce signal loss, enhance corrosion resistance, and improve the adaptability and stability of the system in complex environments. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. It is obvious that the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] In this embodiment, the first radiator (PIFA structure) of the dual-band antenna unit has a length of 30 mm and a width of 20 mm, and the second radiator (microstrip patch antenna structure) has a length of 40 mm and a width of 30 mm. The power divider / synthesizer distributes the transmitted signal to the first radiator and the second radiator in a ratio of 3:7. The DMR band filter adopts an LC filter circuit, and the RTK band filter adopts a surface acoustic wave filter. This embodiment is suitable for small mobile devices with strict requirements on antenna size, such as handheld terminals. The smaller antenna size makes the device easier to carry. The 3:7 power distribution ratio can reasonably allocate signal power according to the frequency and importance of DMR communication and RTK positioning in actual application scenarios to ensure the normal operation of the two functions. At the same time, different types of filters can effectively suppress interference signals in their respective frequency bands and improve signal quality.

[0023] Example 2

[0024] In this embodiment, the size of the first radiator is adjusted to 35 mm in length and 25 mm in width, and the size of the second radiator is changed to 45 mm in length and 35 mm in width. The distribution ratio of the power divider / synthesizer is changed to 5:5. The impedance matching circuit adopts a π-type network structure for impedance adjustment. This embodiment is suitable for scenarios where communication and positioning requirements are relatively balanced, such as logistics and transportation vehicle monitoring. The 5:5 power distribution ratio enables DMR communication and RTK positioning to obtain equal signal power support, ensuring that stable intercom communication and high-precision positioning information can be achieved during vehicle driving. The impedance matching circuit of the π-type network structure can better adapt to the impedance changes of the antenna under different working conditions, further improving the working efficiency of the antenna.

[0025] Example 3

[0026] In this embodiment, the first radiator and the second radiator are made of copper alloy, which has lower resistance and better conductivity than ordinary metals. The power divider / synthesizer distributes the transmitted signal in a ratio of 2:8. The DMR signal processing module and the RTK signal processing module use more advanced adaptive data processing algorithms, which can respond more quickly to changes in signal strength and interference conditions. This embodiment is suitable for scenarios with extremely high requirements for signal transmission quality, such as surveying and mapping operations. The radiator made of copper alloy can reduce the loss during signal transmission and improve the signal radiation and reception performance, thereby ensuring the accuracy of surveying and mapping data. The power distribution ratio of 2:8 focuses more on the RTK positioning function, which meets the requirements of surveying and mapping operations for high-precision positioning. The advanced adaptive data processing algorithm can quickly optimize signal processing parameters in complex environments to ensure the stability of communication and positioning.

[0027] Example 4

[0028] In this embodiment, the spatial coupling mode between the first radiator and the second radiator of the dual-band antenna unit is optimized, and a combination of electromagnetic coupling and capacitive coupling is adopted. The allocation ratio of the power divider / synthesizer is 4:6. The RTK signal processing module has added a multipath effect suppression function. This embodiment is suitable for environments with complex signal reflections such as urban areas with high-rise buildings. The optimized coupling mode can enhance the signal transmission efficiency between the two radiators and reduce signal attenuation. The 4:6 power allocation ratio not only ensures a certain DMR communication capability, but also strengthens the RTK positioning function, which helps to quickly and accurately obtain positioning information in complex environments. The multipath effect suppression function can effectively reduce the positioning error caused by signal reflection and improve the accuracy of RTK positioning.

[0029] Example 5

[0030] In this embodiment, a nano-scale anti-corrosion coating is coated on the surface of the first radiator and the second radiator to further improve the corrosion resistance of the antenna. The power divider / synthesizer distributes the transmission signal in a ratio of 1:9. The DMR signal processing module and the RTK signal processing module exchange data with external devices through a high-speed data interface. This embodiment is suitable for harsh working environments, such as coastal areas, chemical plants, etc. The anti-corrosion coating can protect the radiator from corrosion and extend the service life of the antenna. The power distribution ratio of 1:9 is greatly inclined to the RTK positioning function. In these harsh environments, high-precision positioning is crucial for the operation and safety monitoring of the equipment. The high-speed data interface can realize the rapid transmission of large amounts of data, meeting the needs of real-time data processing and monitoring in harsh environments.

[0031] In summary, the differences and benefits of the above embodiments are analyzed

[0032] 1. Size and Power Allocation Differences and Benefits: Example 1 and Example 2 differ in antenna unit size and power allocation ratio. Example 1's small size is suitable for small mobile devices, and a specific power allocation ratio can allocate signal power based on the importance of the function. Example 2's balanced power allocation and moderate size are suitable for scenarios where communication and positioning requirements are balanced, ensuring stable operation of both functions.

[0033] 2. Differences and benefits between materials and algorithms: Example 3 uses special materials and advanced algorithms. The special materials reduce signal loss, and the advanced algorithms quickly optimize parameters to meet the requirements of surveying and mapping operations for high precision and stability. The other examples are relatively basic in terms of materials and algorithms and are suitable for general scenarios.

[0034] 3. Differences and benefits between coupling and functions: Example 4 optimizes the coupling method and adds specific functions, which is suitable for complex signal environments and improves signal transmission efficiency and positioning accuracy; the conventional coupling methods and functions of other embodiments can work normally in simple environments, but their performance is limited in complex environments.

[0035] 4. Differences and benefits between protection and interfaces: Example 5 adds an anti-corrosion coating and a high-speed data interface, which is suitable for harsh environments, protects the antenna and meets data transmission requirements; other embodiments are not specially designed for harsh environments and can function in normal environments.

[0036] Through the design of the above different embodiments, the dual-band co-fed antenna system of the present invention can flexibly adjust its own parameters and functions according to different application scenarios and requirements to achieve better communication and positioning performance, and has broad application prospects and market value.

[0037] The present invention and its implementation methods are described above. This description is not restrictive. In short, if ordinary technicians in this field are inspired by it and do not depart from the purpose of the invention, they can creatively design structures and embodiments similar to the technical solution, which should fall within the scope of protection of the present invention.

Claims

1. A dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning, characterized in that: The system comprises a dual-band antenna unit, a feed network unit, and a signal processing unit. The dual-band antenna unit adopts a composite structure design and comprises a first radiator for receiving and transmitting DMR band signals and a second radiator for receiving and transmitting RTK band signals. The feed network unit connects the dual-band antenna unit and the signal processing unit and comprises a power divider / synthesizer, an impedance matching circuit, and a filter. The signal processing unit comprises a DMR signal processing module and an RTK signal processing module.

2. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The first radiator is a planar inverted F antenna (PIFA) structure, the second radiator is a microstrip patch antenna structure, and the first radiator and the second radiator are spatially coupled to each other.

3. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The power divider / combiner is used to distribute the transmission signal from the signal processing unit to the first radiator and the second radiator of the dual-band antenna unit in proportion, and to combine the signals received by the first radiator and the second radiator and transmit them to the signal processing unit.

4. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The impedance matching circuit is used to adjust the impedance between the dual-band antenna unit and the feeder, so that the antenna achieves a good impedance matching state in both the DMR band and the RTK band.

5. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The filters include a DMR frequency band filter and an RTK frequency band filter, which are respectively used to filter the DMR frequency band signal and the RTK frequency band signal to suppress out-of-band interference.

6. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The DMR signal processing module is used to perform modulation and encoding processing on the transmission signal of the DMR frequency band, and to perform demodulation and decoding processing on the received signal.

7. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The RTK signal processing module is used to capture, track, measure and position satellite signals in the RTK frequency band.

8. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The DMR signal processing module and the RTK signal processing module perform data exchange with external devices through a data interface.

9. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The first radiator and the second radiator of the dual-band antenna unit are made of a specific metal material with low resistance, high conductivity and good corrosion resistance, so as to improve the signal radiation and reception performance and service life of the antenna in different working environments.

10. The dual-band co-feed antenna system compatible with DMR and RTK high-precision positioning according to claim 1, characterized in that: The DMR signal processing module and RTK signal processing module in the signal processing unit adopt an adaptive data processing algorithm, which can adjust processing parameters in real time according to signal strength, interference conditions, etc., to optimize DMR communication quality and RTK positioning accuracy.