Circularly polarized multi-port multifunctional receiving device

Abstract

The utility model relates to a microwave antenna, a feed network, embedded system development and ground-air wireless communication technology, and provides a circularly polarized multi-port multifunctional receiving device, which comprises a circularly polarized antenna, a power divider, a wireless radio frequency communication module and a main control module which are electrically connected in sequence, the wireless radio frequency communication module comprises a Bluetooth module and a Wi-Fi module, the working frequency band of the circularly polarized antenna is 2.4 GHz-2. 5 GHz, and Bluetooth and Wi-Fi communication frequency bands are covered. According to the utility model, the circularly polarized antenna and the wireless radio frequency communication module at the rear end are connected through the multi-port power divider network, so that a miniaturized and compact operation identification ground station wireless signal receiving system is realized.

Description

Technical Field

[0001] This utility model relates to microwave antennas, power supply networks, embedded system development, and air-to-ground wireless communication technology, and in particular to a circularly polarized multi-port multi-functional receiver and its application in the field of remote identification of unmanned aerial vehicles. Background Technology

[0002] With the development of unmanned aerial vehicle (UAV) technology, the demand for wireless communication between UAVs and between UAVs and ground stations is constantly increasing. Wireless LAN (WLAN) technology, commonly used for UAV wireless communication, typically supports the 2.4GHz frequency band and is inexpensive. To achieve efficient wireless transmission, ground receiving base stations often require a large number of signal transmitting and receiving devices, i.e., antennas. With the development of unmanned aerial vehicle (UAV) technology and the promotion and popularization of UAV flights, the demand for UAV surveillance is also constantly increasing due to considerations of airspace safety, public safety, and aviation safety. Against this backdrop, UAV remote identification technology based on the concept of air-to-ground cooperation has emerged and become an open standard. UAV remote identification is based on WLAN broadcast technology and typically supports the 2.4GHz (2400MHz~2483.5MHz) frequency band. To achieve broad UAV surveillance coverage, a large number of signal UAV remote identification ground stations need to be deployed and equipped with receiving devices, i.e., antennas.

[0003] However, installation space for radio receiving equipment is often extremely valuable. Numerous transceiver antennas and their associated radio frequency circuits not only occupy limited space but also increase the manufacturing cost of the receiving station. To achieve longer communication distances, remote identification ground stations typically use high-gain antennas, which occupy a large space and are difficult to transport, install, and maintain, further increasing manufacturing and operational costs. Furthermore, close proximity of transceiver antennas causes mutual interference due to electromagnetic wave coupling. On the other hand, due to the variable attitude of aircraft in flight, the polarization characteristics of the transceiver antennas relative to the ground constantly change. Therefore, two types of vertically polarized antennas are required to ensure the stability and continuity of wireless communication, which significantly increases the waste of space resources, resulting in a doubling of space occupancy and restricting the deployment range and application scenarios of operational identification ground stations, such as in densely populated urban areas and mobile surveillance scenarios. Existing unmanned aerial vehicle surveillance technologies, including but not limited to radar, optoelectronic, and spectrum analysis technologies, cannot be used for wide-area airspace coverage due to numerous limitations in performance, cost, deployment difficulty, and health and safety. Utility Model Content

[0004] This invention proposes a circularly polarized multi-port multi-functional receiver for receiving 2.4GHz (2400MHz~2483.5MHz) wireless signals, used for remote identification of unmanned aerial vehicles. It aims to overcome the problems of numerous antennas and complex power supply networks in wireless communication systems, while meeting the needs of wide-area deployment.

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

[0006] A circularly polarized multi-port multi-functional transceiver includes: a circularly polarized antenna, a power divider, a wireless radio frequency communication module, and a main control module connected in sequence. The wireless radio frequency communication module includes a Bluetooth module and a Wi-Fi module. The circularly polarized antenna operates in the 2.4GHz-2.5GHz frequency band, covering the Bluetooth and Wi-Fi communication frequency bands.

[0007] In some preferred embodiments, the Bluetooth module includes one or more of the classic Bluetooth module, BLE Bluetooth module, and dual-mode Bluetooth module. Both the Bluetooth module and the Wi-Fi module integrate a chip, radio frequency circuit, and radio frequency switch. The output terminal of the power divider is connected to the input terminal of the radio frequency switch of each module via radio frequency connection lines. The output terminal of the radio frequency switch is connected to the corresponding radio frequency circuit. The chip of each module drives the radio frequency switch through a control signal to switch the signal connection between the radio frequency circuit and the power divider.

[0008] In some preferred embodiments, the circularly polarized antenna is connected to the power divider via an RF connection line.

[0009] In some preferred embodiments, the radio frequency circuits of the Bluetooth module and the Wi-Fi module are both integrated into the corresponding chip. The radio frequency circuits include a power amplifier, a low-noise amplifier, a filter, and electrostatic protection. The chip also integrates a Bluetooth antenna interface and an analog-to-digital converter.

[0010] In some preferred embodiments, the circularly polarized antenna is fed via a coaxial line with the feeding point located at the center of the circularly polarized antenna.

[0011] In some preferred embodiments, the wireless radio frequency communication module is connected to the main control module via a serial interface.

[0012] In some preferred embodiments, the main control module uses a Cortex-M series chip.

[0013] In some preferred embodiments, the circularly polarized antenna is any one of a low-profile omnidirectional circularly polarized antenna, a radial-mode circularly polarized helical antenna, an axial-mode circularly polarized helical antenna, and a circularly polarized microstrip antenna.

[0014] In some preferred embodiments, the device further includes a built-in rechargeable battery, a USB-Type C interface, and an Ethernet interface, through which the rechargeable battery is charged, and during the charging process, wired data transmission with external devices is performed through the USB-Type C interface or the Ethernet interface.

[0015] In some preferred embodiments, the device further includes a mobile communication module directly connected to and powered by the rechargeable battery, used to enable wireless data transmission with a remote server.

[0016] Beneficial effects:

[0017] This invention achieves a miniaturized and compact wireless signal receiving system for ground stations by using a multi-port power divider network to connect a circularly polarized antenna to a back-end wireless radio frequency communication module.

[0018] This circularly polarized antenna ensures the ground station's efficient reception of electromagnetic wave signals in any polarization direction through its circular polarization characteristics, and achieves wide-area signal coverage for the ground station through its omnidirectional radiation characteristics.

[0019] By using a multi-port power divider network to connect the antenna and the wireless RF communication module, integrated multi-functional signal processing capabilities are achieved, including compliance with specified transmission protocols (such as Bluetooth 4, 5, Wi-Fi, etc.) and adaptive switching between various communication protocols. It covers all frequency bands. The Wi-Fi module supports IEEE 802.11b / g / n protocols.

[0020] This invention enables the creation of a wide coverage network by interconnecting multiple ground stations, or the rapid deployment of a single device for immediate on-site operation, achieving maximum efficiency and convenience. Attached Figure Description

[0021] Figure 1 This is a structural block diagram of a circularly polarized multi-port multi-functional receiving device according to one embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Another embodiment of a circularly polarized multi-port multi-functional receiver is shown in the block diagram.

[0023] Figure 3 This is a structural block diagram of the wireless radio frequency communication module chip of this utility model;

[0024] Figure 4 This is a schematic diagram of the circularly polarized planar helical antenna structure provided by this utility model;

[0025] Figure 5 This is a schematic diagram of the low-profile omnidirectional circularly polarized antenna structure provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the circularly polarized spiral antenna structure provided by this utility model;

[0027] Figure 7 This is a schematic diagram of the circularly polarized microstrip antenna structure provided by this utility model.

[0028] The following are the reference numerals in the diagram: 1. Circularly polarized antenna; 2. Power divider; 3. Classic Bluetooth module; 4. BLE Bluetooth module; 5. Wi-Fi module; 6. Serial interface; 7. Main control module; 8. Mobile communication module; 9. USB-Type C interface; 10. Ethernet interface; 11. Rechargeable battery; 12. Power amplifier; 13. RF switch; 14. Analog-to-digital converter; 15. Bluetooth antenna interface; 16. Electrostatic discharge protection; 17. Filter; 18. Low noise amplifier. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0030] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Directional terms such as "upper," "lower," "left," and "right" are defined relative to the indicated orientation of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts used for relative description and clarification, and they may change accordingly depending on the orientation of the components in the accompanying drawings.

[0031] Example 1, please refer to Figure 1 and Figure 3A circularly polarized multi-port multi-functional transceiver device includes: a circularly polarized antenna 1, a power divider 2, a wireless radio frequency communication module, and a main control module 7, which are electrically connected in sequence. The power divider 2 is a 1-to-3 power divider. The wireless radio frequency communication module includes a classic Bluetooth module 3, a BLE Bluetooth module 4, and a Wi-Fi module 5. In some embodiments, the classic Bluetooth module 3 and BLE Bluetooth module 4 can be replaced with a dual-mode Bluetooth module. The power divider is selected according to actual needs. The circularly polarized antenna 1 operates at a frequency of 2.4GHz to 2.5GHz, covering the Bluetooth and Wi-Fi bands. In application scenarios, the circularly polarized antenna can be implemented in different ways, for example... Figure 4-7 The diagram shows a circularly polarized planar helical antenna, a low-profile omnidirectional circularly polarized antenna, a circularly polarized helical antenna, and a circularly polarized microstrip antenna. Among these, the preferred scheme is to use... Figure 5 The low-profile omnidirectional circularly polarized antenna shown includes a full-line antenna section and a circularly polarized antenna section. It achieves wide-area signal coverage for the ground station through omnidirectional radiation characteristics and ensures efficient reception of electromagnetic wave signals in any polarization direction through circular polarization characteristics. Specifically, the height of the aforementioned low-profile omnidirectional circularly polarized antenna is no higher than 0.05 times the free-space wavelength corresponding to the operating frequency.

[0032] Preferably, the circularly polarized antenna 1 is connected to the power divider 2 via a coaxial connector transmission line.

[0033] Specifically, the classic BT Bluetooth module 3, BLE Bluetooth module 4, and Wi-Fi module 5 all integrate chips, radio frequency circuits, and radio frequency switches 13. The output of the power divider 2 is connected to the input of the radio frequency switch 13 of each module via radio frequency connection lines, and the output of the radio frequency switch 13 is connected to the corresponding radio frequency circuit. The chip of each module drives the radio frequency switch 13 through control signals to switch the signal connection between the radio frequency circuit and the power divider 2. In this embodiment, the radio frequency connection line is preferably a 50Ω radio frequency connection line.

[0034] Preferably, the radio frequency (RF) circuits of the classic BT Bluetooth module 3, BLE Bluetooth module 4, and Wi-Fi module 5 are all integrated into the corresponding chip. The RF circuit includes a power amplifier 12, a low-noise amplifier 18, a filter 17, and electrostatic discharge protection 16. The chip also integrates a Bluetooth antenna interface 15 and an analog-to-digital converter 14. In this device, the Bluetooth interface is used to connect to the power divider 2, and then to the circularly polarized antenna 1.

[0035] Furthermore, the circularly polarized antenna 1 is fed via a coaxial line, with the feeding point located at the axis of the circularly polarized antenna 1.

[0036] Specifically, the wireless radio frequency communication module is connected to the main control module 7 via serial interface 6. In some application scenarios, serial interface 6 is a UART. In some preferred implementations, the chip in the main control module 7 is a Cortex-M series chip, that is, the main control module uses an ARM Cortex-M series microcontroller (preferably with an M4 core). In this way, the main control chip controls the chips in the wireless radio frequency communication module through the serial port, performing data transmission and reception, selection of conduction branches, signal processing, etc.

[0037] Example 2, please refer to Figure 2 Unlike Embodiment 1, the circularly polarized multi-port multi-functional transceiver also includes a built-in rechargeable battery 11, a USB-Type C interface 9, and an Ethernet interface 10. The rechargeable battery 11 is charged via the USB-Type C interface 9 or the Ethernet interface 10. During charging, wired data transmission with external devices is performed via the USB-Type C interface 9 or the Ethernet interface 10. The built-in rechargeable battery 11 is configured to provide the power required for the device's operation and is typically a lithium battery. The two charging interface modules, USB-Type C interface 9 and Ethernet interface 10 conforming to the IEEE 802.3at standard, simultaneously support: charging the built-in lithium battery via USB-Type C interface 9 or the Ethernet interface 10; and bidirectional wired data transmission with external devices during charging via USB-Type C interface 9 or the Ethernet interface 10. The charging and data transmission functions of the USB-Type C interface 9 and the Ethernet interface operate in parallel, and the charging and data transmission operations of the two interfaces do not interfere with each other.

[0038] This circularly polarized multi-port multi-functional transceiver also includes a mobile communication module 8, which is directly connected to and powered by the rechargeable battery 11, and is used to realize wireless data transmission with a remote server. The mobile communication module 8 can be a 4G wireless communication module, which can be directly connected to and powered by the rechargeable lithium battery, and is used to establish a wireless data transmission link with the remote server during device movement. The data transmission link of the 4G module is independent of the data transmission links of the USB-Type C interface 9 and the Ethernet interface 10, supporting multi-channel concurrent communication. The rechargeable battery 11, USB-Type C interface 9, Ethernet interface 10, and mobile communication module 8 are all controlled by the main control module 7.

[0039] Please continue reading. Figure 2As shown, the main control module 7 is scalable and includes an expandable interface unit for connecting external functional components: a Wi-Fi communication unit for establishing a wireless connection with a mobile terminal (such as a mobile phone) and transmitting data; an LED control unit for driving and configuring the LED display status; and a non-volatile storage unit with integrated EEP ROM memory for storing device configuration parameters and user data.

[0040] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly, for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] The present utility model has been described in detail above, with the aim of enabling those skilled in the art to understand its contents and implement it. However, this description should not be construed as limiting the scope of protection of the present utility model. Furthermore, the present utility model is not limited to the above-described embodiments. All equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A circularly polarized multi-port multifunctional receiving device, characterized in that, include: The circularly polarized antenna (1), power divider (2), wireless radio frequency communication module and main control module (7) are electrically connected in sequence. The wireless radio frequency communication module includes a Bluetooth module and a Wi-Fi module (5). The operating frequency band of the circularly polarized antenna (1) is 2.4GHz-2.5GHz, covering the Bluetooth and Wi-Fi communication frequency bands.

2. The circularly polarized multi-port multi-functional receiving device according to claim 1, characterized in that, The Bluetooth module includes one or more of the classic BT Bluetooth module (3), BLE Bluetooth module (4) and dual-mode Bluetooth module. Both the Bluetooth module and the Wi-Fi module (5) integrate a chip, radio frequency circuit and radio frequency switch (13). The output terminal of the power divider (2) is connected to the input terminal of the radio frequency switch (13) of each module through radio frequency connection lines. The output terminal of the radio frequency switch (13) is connected to the corresponding radio frequency circuit. The chip of each module drives the radio frequency switch (13) through control signals to switch the signal connection between the radio frequency circuit and the power divider (2).

3. The circularly polarized multi-port multifunctional receiving device according to claim 1, characterized in that, The circularly polarized antenna (1) is connected to the power divider (2) via a radio frequency connection line.

4. The circularly polarized multi-port multifunctional receiving device according to claim 2, characterized in that, The radio frequency circuits of the Bluetooth module and the Wi-Fi module (5) are integrated into the corresponding chip. The radio frequency circuits include a power amplifier (12), a low noise amplifier (18), a filter (17) and electrostatic protection (16). The chip also integrates a Bluetooth antenna interface (15) and an analog-to-digital converter (14).

5. A circularly polarized multi-port multifunctional receiving device according to claim 1, characterized in that, The circularly polarized antenna (1) is fed by a coaxial line, and the feeding point is located at the axis of the circularly polarized antenna (1).

6. The circularly polarized multi-port multifunctional receiving device according to claim 1, characterized in that, The wireless radio frequency communication module is connected to the main control module (7) through a serial interface (6).

7. A circularly polarized multi-port multifunctional receiving device according to claim 1, characterized in that, The main control module (7) uses a Cortex-M series chip.

8. A circularly polarized multi-port multifunctional receiving device according to claim 1, characterized in that, The circularly polarized antenna (1) is any one of a low-profile omnidirectional circularly polarized antenna, a radial-mode circularly polarized spiral antenna, an axial-mode circularly polarized spiral antenna, and a circularly polarized microstrip antenna.

9. A circularly polarized multi-port multi-functional receiving device according to claim 1, characterized in that, It also includes a built-in rechargeable battery (11), a USB-Type C interface (9) and an Ethernet interface (10), the rechargeable battery (11) is charged through the USB-Type C interface (9) or the Ethernet interface (10), and wired data transmission with external devices is performed through the USB-Type C interface (9) or the Ethernet interface (10) during the charging process.

10. A circularly polarized multi-port multifunctional receiving device according to claim 9, characterized in that, It also includes a mobile communication module (8), which is directly connected to the rechargeable battery (11) and powered by the rechargeable battery (11) to enable wireless data transmission with a remote server.

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