Aircraft wireless communication terminal

Abstract

The invention relates to the technical field of wireless communication, and discloses an aircraft wireless communication terminal which comprises an aircraft cabin inner part and an aircraft cabin outer part which are in communication connection with each other. Wherein the aircraft cabin inner part comprises a signal processing and power supply board, the signal processing and power supply board comprises a signal processing part and a power supply part, and the aircraft cabin outer part comprises a power amplifier board, a first antenna and a second antenna. The problems of redundant design, poor applicability and the like of matched products in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to an aircraft wireless communication terminal. Background Art

[0002] With the increasingly fierce competition in science and technology, how to enable effective wireless communication between aircraft and the ground has become an important research field of wireless communication. There is usually an aircraft control interaction center on the ground, and the reliable transmission of wireless interaction information ensures the normal operation of the aircraft and the ground control center. The selection of traditional wireless interaction terminals between aircraft and the ground basically continues to stack old wireless communication products, resulting in redundant design of supporting products and poor applicability. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an aircraft wireless communication terminal to solve the problems of redundant design of supporting products and poor applicability in the prior art.

[0004] The technical solution adopted by the present invention to solve the above problems is: An aircraft wireless communication terminal includes an aircraft cabin inner part and an aircraft cabin outer part which are communicatively connected to each other; wherein the aircraft cabin inner part includes a signal processing and power supply board, the signal processing and power supply board includes a signal processing part and a power supply part, and the aircraft cabin outer part includes a power amplifier board, a first antenna, and a second antenna.

[0005] As a preferred technical solution, the inner part of the aircraft cabin also includes a channel plate.

[0006] As a preferred technical solution, the first antenna, the power amplifier board, the channel board, and the signal processing part are communicatively connected in sequence, and the second antenna, the power amplifier board, the channel board, and the signal processing part are communicatively connected in sequence.

[0007] As a preferred technical solution, the signal processing part includes a ZYNQ-7000 series chip and a CX9261 chip. The ZYNQ-7000 series chip and the CX9261 chip are connected to each other through a control bus and an interactive bus. The ZYNQ-7000 series chip is also used to communicate with the power amplifier board through an RS-422 bus.

[0008] As a preferred technical solution, the signal processing part also includes a clock distribution circuit and a crystal oscillator which are communicatively connected to each other, and the clock distribution circuit is communicatively connected to the ZYNQ-7000 series chip and the CX9261 chip respectively.

[0009] As a preferred technical solution, the channel board includes a receiving channel, and the receiving channel includes a limiter, a first filter, a first amplifier, a second filter, a first mixer, and a third filter which are communicatively connected in sequence.

[0010] As a preferred technical solution, the channel board includes a transmitting channel, and the transmitting channel includes an attenuator, a second amplifier, a fourth filter, a second mixer, a fifth filter, a second amplifier, and a sixth filter which are sequentially communicatively connected.

[0011] As a preferred technical solution, the power amplifier board includes an adjustable attenuator, a third amplifier, a seventh filter, a third amplifier, an isolator, an eighth filter, a circulator, and an integrated antenna 2-to-1 switch that are communicatively connected in sequence. The adjustable attenuator is used to communicate with the transmitting channel of the channel board, the circulator is used to communicate with the receiving channel of the channel board, and the integrated antenna 2-to-1 switch is used to communicate with the first antenna and the second antenna respectively.

[0012] As a preferred technical solution, the first antenna is arranged in the east direction of the aircraft and the second antenna is arranged in the west direction of the aircraft, or the first antenna is arranged in the west direction of the aircraft and the second antenna is arranged in the east direction of the aircraft.

[0013] As a preferred technical solution, the power supply part includes a management unit, a temperature detection circuit, a 28V DC-DC module, a 12V DC-DC module, a 3.3V DC-DC module, a first voltage detection circuit, a second voltage detection circuit, and a third voltage detection circuit. The 28V DC-DC module, the first voltage detection circuit, and the management unit are communicatively connected in sequence, the 12V DC-DC module, the second voltage detection circuit, and the management unit are communicatively connected in sequence, the 3.3V DC-DC module, the third voltage detection circuit, and the management unit are communicatively connected in sequence, and the temperature detection circuit is communicatively connected to the management unit.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention not only meets the requirement of limited internal space of the aircraft, but also makes full use of the external space, reducing the occupancy of the interior of the aircraft. The compact design of the entire structure allows the aircraft to be equipped with more other functional components, thereby improving the overall design flexibility and space utilization; (2) The present invention not only improves the stability of the system, but also enables each module to be maintained or upgraded without affecting the functions of other modules; (3) The present invention ensures efficient transmission of power signals and radio frequency signals while reducing interference, which not only enhances the reliability of the system but also reserves redundant interfaces for future expansion, thereby improving the scalability and adaptability of the system; (4) The reasonable arrangement of the antennas of the present invention ensures that the signal communication between the ground and the aircraft remains stable under various flight attitudes, ensuring the signal quality and transmission efficiency; (5) The present invention improves the power management capability of the system and can provide timely feedback and processing when power anomalies occur, thereby ensuring the reliability and safety of the system and further improving the flexibility and adaptability of the system.

[0015] (6) The present invention maximizes the efficiency of signal transmission and reception, ensures the signal quality and isolation during signal amplification and transmission, and avoids signal crosstalk and loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of the present invention; Figure 2 It is a schematic diagram of wireless signal interaction; Figure 3 This is the circuit diagram of the power supply part; Figure 4 This is the circuit diagram of the signal processing part; Figure 5 This is the architecture diagram of the channel board receiving channel; Figure 6 This is the architecture diagram of the channel board transmission channel; Figure 7 This is the architecture diagram of the power amplifier board and antenna; Figure 8 Schematic diagram of antenna location. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0018] Example 1 like Figures 1 to 8 As shown, the present invention combines the application scenario of wireless communication between aircraft and the ground, takes into account the structural characteristics of the aircraft itself, and proposes a terminal design architecture and method for wireless communication with high space utilization, light weight, and simple integration.

[0019] The wireless communication terminal of the present invention is composed of an aircraft cabin internal part (channel board, signal processing and power supply board) and an aircraft cabin external part (power amplifier board, first antenna, second antenna), and is designed according to the Ku band.

[0020] 1. Signal processing and power board: The design includes signal processing part and power supply part. The signal processing part is responsible for the reception and transmission of communication signals, information fusion and other processing, and the power supply part is used to power the communication terminal.

[0021] 2. Channel board: responsible for frequency conversion, filtering and other processing of some communication signals on the channel link.

[0022] 3. Antenna: responsible for sending and receiving radio frequency signals.

[0023] 4. Power amplifier board: RF power amplifier signal reception and transmission, power amplification and other processing.

[0024] The interaction relationship between wireless signals is as follows: Figure 2 .

[0025] The wireless signal is received from the two antennas and the RF signal is transmitted to the power amplifier board for power amplification and other processing. The processed wireless signal passes through the channel board for link-related frequency conversion, filtering and other processing. Finally, it is transmitted to the signal processing part of the signal processing board and the power board for data fusion and other processing. The transmission of wireless signals is the reverse process of reception.

[0026] For the interaction between the cabin and the outside, two connectors, connector 1 (J30J09P02JSS00S00000) and connector 2 (JH-ZGJ02TF), are selected as the interaction interface. The function of connector 1 is to complete the connection of power supply and control of the power amplifier, and the function of connector 2 is to complete the connection of RF signal transmission. The interaction design of connector 1 is shown in Table 1. The interaction design of connector 2 is shown in Table 2.

[0027] Table 1 Connector 1 interactive interface design table

[0028] Table 2 Connector 2 interactive interface design table

[0029] (a) Signal processing and power board design.

[0030] 1. The power supply is designed as follows: Figure 3 .

[0031] The power supply part includes 28V DC-DC module, 12V DC-DC module and 3.3V DC-DC module, various voltage detection circuits, temperature detection circuit, management unit, etc.

[0032] The 28V DC-DC module, 12V DC-DC module and 3.3V DC-DC module respectively complete the conversion of external voltage into the required 28V, 12V and 3.3V voltages. The temperature detection circuit mainly completes the temperature detection of the power supply part. The voltage detection circuit mainly completes the voltage detection part of the 28V DC-DC, 12V DC-DC and 3.3V DC-DC modules. The management unit mainly completes the management of the power module temperature, voltage, etc.

[0033] 2. Signal processing design Figure 4 .

[0034] The signal processing part is mainly composed of a FPGA processor, a clock distribution circuit, a CX9261 chip, an external interface circuit, etc.

[0035] CX9261 is a broadband multi-mode RF transceiver chip that integrates low noise amplifier, up / down mixer, multi-mode filter, ADC / DAC, driver amplifier, fractional frequency synthesis, logic control, extraction / interpolation filtering, digital down conversion and automatic calibration. It has three receiving channels and two transmitting channels.

[0036] The ZYNQ-7000 series is based on the first generation SoC architecture of Xilinx. The present invention designs 1 RS-422 to mainly control the power amplifier, 1 CX9261 control bus, and 1 CX9261 interactive bus. The two interactive channels can be selected according to different needs.

[0037] (ii) Channel plate design.

[0038] 1. Channel board receiving design Figure 5 .

[0039] After the RF signal enters the receiving part from the antenna port, it is first limited by the limiter, then enters the broadband filter to filter out environmental interference, and then amplified by the low-noise amplifier; secondly, the frequency band signal is filtered; finally, the output path is frequency-converted by the mixer, and the intermediate frequency signal is obtained after filtering by the filter.

[0040] 2. Channel plate launch design Figure 6 .

[0041] The signal processing part inputs an intermediate frequency signal, which is filtered after being processed by the attenuator and amplifier, and then frequency-converted with the local oscillator signal. After the spurious signal is filtered out by a customized bandpass filter, an RF signal is output to the power amplifier transmitting part after a first stage of amplification and filtering.

[0042] (III) Power amplifier board and antenna design Figure 7 .

[0043] The power amplifier board and antenna design include transmission and reception.

[0044] Transmission: The channel board transmits one RF signal, and an adjustable attenuator is used to control the output power of the transmission path. Two driver amplifiers make the input power of the terminal amplifier meet the requirements. The filter group is used to filter out the harmonics of the first two driver amplifiers. The RF signal of the terminal amplifier saturation power is isolated by an isolator to prevent the signal from returning and damaging the amplifier. Finally, the cavity filter group filters out the harmonics. The circulator can isolate the reception of the RF signal, and finally the integrated antenna 2-to-1 switch is used to select the antenna in a certain direction for radiation.

[0045] The receiving device selects one antenna to receive the RF signal through the integrated antenna 2-to-1 switch, and isolates the transmission of the ground-bound RF signal through the circulator, and then the RF signal is sent to the channel board receiving channel.

[0046] The present invention designs two antennas and one power amplifier, and the antennas are placed in the east-west direction outside the aircraft. Figure 8 This design ensures that the minimum number of antennas is selected within the maximum signal interaction range between the actual ground and the aircraft, and the design is efficient and cost-saving.

[0047] The present invention adopts efficient space utilization and structural design: The present invention particularly considers the miniaturization and lightweight requirements of the aircraft by integrating the signal processing board and the channel board inside the aircraft cabin, while large-sized components such as the power amplifier and the antenna are installed outside the cabin. This design not only meets the requirements of the limited internal space of the aircraft, but also makes full use of the external space and reduces the occupancy of the interior of the fuselage. The layout and number of antennas are designed with consideration of the actual application scenarios. The compact architecture of the entire design allows the aircraft to be installed with more other functional components, thereby improving the overall design flexibility and space utilization.

[0048] The present invention adopts a modular wireless communication architecture: the invention divides the wireless communication terminal into different functional modules, including signal processing board, channel board, power amplifier board and antenna, etc., to ensure the functional independence of each module. This modular design not only improves the stability of the system, but also enables each module to be maintained or upgraded without affecting the functions of other modules.

[0049] The present invention adopts a flexible signal interaction design: The wireless signal interaction design of the present invention uses two connectors (J30J09P02JSS00S00000 and JH-ZGJ02TF) to complete the power supply and control of the power amplifier and the transmission of the RF signal. Through this separate signal path design, the efficient transmission of the power signal and the RF signal is ensured, while reducing interference. This design not only enhances the reliability of the system, but also reserves redundant interfaces for future expansion, improving the scalability and adaptability of the system.

[0050] The signal transmission and reception of the present invention has high reliability: through the design of two antennas, which are arranged in the east and west directions of the aircraft respectively, the maximum signal coverage range is achieved. The reasonable arrangement of the antennas ensures that the signal communication between the ground and the aircraft remains stable under various flight postures. In particular, the design of the power amplifier and the filter is integrated to ensure the signal quality and transmission efficiency. The present invention adopts an integrated design of signal processing and power management: a power management module is integrated in the signal processing board, which can convert the external voltage into different voltages required by the system (such as 12V, 3.3V, etc.), and has built-in voltage detection, temperature detection and management units. This design improves the power management capability of the system, and can provide timely feedback and processing when power supply abnormalities occur, ensuring the reliability and security of the system. At the same time, the signal processing part adopts the highly integrated CX9261 RF transceiver chip, combined with the ZYNQ-7000 series SoC chip, which can realize multi-channel and multi-mode signal processing, further improving the flexibility and adaptability of the system.

[0051] The present invention adopts an integrated layout design of antenna and power amplifier: the design of antenna and power amplifier board adopts a highly integrated layout form. The antenna and power amplifier board form a whole, which can not only amplify the radio frequency signal, but also match with the antenna, so as to maximize the efficiency of signal transmission and reception. Components such as adjustable attenuator, driver amplifier, filter group and circulator are adopted to ensure the signal quality and isolation during signal amplification and transmission, and avoid signal crosstalk and loss.

[0052] As described above, the present invention can be preferably implemented.

[0053] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. An aircraft wireless communication terminal, characterized in that: It includes an aircraft cabin inner part and an aircraft cabin outer part which are communicatively connected to each other; wherein the aircraft cabin inner part includes a signal processing and power supply board, the signal processing and power supply board includes a signal processing part and a power supply part, and the aircraft cabin outer part includes a power amplifier board, a first antenna, and a second antenna.

2. An aircraft wireless communication terminal according to claim 1, characterized in that: The inner part of the aircraft cabin also includes a channel panel.

3. An aircraft wireless communication terminal according to claim 2, characterized in that: The first antenna, the power amplifier board, the channel board, and the signal processing part are communicatively connected in sequence, and the second antenna, the power amplifier board, the channel board, and the signal processing part are communicatively connected in sequence.

4. An aircraft wireless communication terminal according to claim 3, characterized in that: The signal processing part includes ZYNQ-7000 series chips and CX9261 chips. The ZYNQ-7000 series chips are connected to the CX9261 chips through a control bus and an interactive bus. The ZYNQ-7000 series chips are also used to communicate with the power amplifier board through an RS-422 bus.

5. An aircraft wireless communication terminal according to claim 4, characterized in that: The signal processing part also includes a clock distribution circuit and a crystal oscillator which are communicatively connected to each other. The clock distribution circuit is communicatively connected to the ZYNQ-7000 series chip and the CX9261 chip respectively.

6. An aircraft wireless communication terminal according to claim 2, characterized in that: The channel board comprises a receiving channel, and the receiving channel comprises a limiter, a first filter, a first amplifier, a second filter, a first mixer, and a third filter which are communicatively connected in sequence.

7. An aircraft wireless communication terminal according to claim 6, characterized in that: The channel board includes a transmitting channel, and the transmitting channel includes an attenuator, a second amplifier, a fourth filter, a second mixer, a fifth filter, a second amplifier, and a sixth filter which are communicatively connected in sequence.

8. An aircraft wireless communication terminal according to claim 7, characterized in that: The power amplifier board includes an adjustable attenuator, a third amplifier, a seventh filter, a third amplifier, an isolator, an eighth filter, a circulator, and an integrated antenna 2-to-1 switch which are communicatively connected in sequence. The adjustable attenuator is used to communicate with the transmitting channel of the channel board, the circulator is used to communicate with the receiving channel of the channel board, and the integrated antenna 2-to-1 switch is used to communicate with the first antenna and the second antenna respectively.

9. The aircraft wireless communication terminal according to claim 1, characterized in that: The first antenna is arranged in the east direction of the aircraft, and the second antenna is arranged in the west direction of the aircraft, or the first antenna is arranged in the west direction of the aircraft, and the second antenna is arranged in the east direction of the aircraft.

10. An aircraft wireless communication terminal according to any one of claims 1 to 9, characterized in that: The power supply part includes a management unit, a temperature detection circuit, a 28V DC-DC module, a 12V DC-DC module, a 3.3V DC-DC module, a first voltage detection circuit, a second voltage detection circuit, and a third voltage detection circuit. The 28V DC-DC module, the first voltage detection circuit, and the management unit are communicatively connected in sequence, the 12V DC-DC module, the second voltage detection circuit, and the management unit are communicatively connected in sequence, the 3.3VDC-DC module, the third voltage detection circuit, and the management unit are communicatively connected in sequence, and the temperature detection circuit is communicatively connected to the management unit.

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