Radio frequency signal variable polarization system and method of array radio frequency simulation system

Abstract

The invention provides a radio frequency signal variable polarization system and method of an array radio frequency simulation system, and the method comprises a radio frequency signal transmitting step: controlling the on-off of a mechanical switch, and transmitting a radio frequency signal to a power divider; and a polarization signal acquisition step: controlling an attenuator and a phase modulator by using a polarization control unit, further controlling the radio frequency signal processed by the power divider, and acquiring a required polarization signal. According to the invention, the radio frequency target simulation system releases the radio frequency signal meeting the frequency and power requirements, so that the polarization control unit calculates the corresponding control word according to the polarization characteristics; attenuators and phase modulators in the polarization analysis unit, the vertical polarization fine control case, the vertical polarization coarse control case, the horizontal polarization fine control case and the horizontal polarization coarse control case are controlled through a control cable to obtain any polarization wave conforming to the polarization axial ratio and the polarization inclination angle, and finally generation and release of the target echo any polarization wave are achieved. And the semi-physical simulation requirements of various aircrafts are met.

Description

Technical Field

[0001] The present invention relates to the field of simulation technology, and in particular to a radio frequency signal polarization changing system and method for an array radio frequency simulation system, and in particular to a radio frequency signal polarization changing implementation system and method for an array radio frequency simulation system. Background Art

[0002] The semi-physical simulation system is a system that simulates target signals in the laboratory and analyzes and verifies the guidance and control system. The semi-physical simulation system plays an indispensable role in reducing R&D costs, shortening the development cycle, and improving the development level.

[0003] The semi-physical simulation test system is mainly composed of a microwave darkroom, a target simulation system, a flight turntable, a communication network, a simulation computer, etc. When the target simulation system releases the RF signal, it needs to control the energy, frequency and polarization characteristics of the released signal according to the working mode of the aircraft radar, the relative position and attitude of the aircraft and the target, to ensure the consistency of the released signal with the actual target echo characteristics.

[0004] Currently, there is no method specifically used for implementing polarization change of RF signals in array RF simulation systems. It is impossible to achieve the generation and release of arbitrary polarization waves of target echoes, and it is impossible to meet the semi-physical simulation requirements of various types of aircraft.

[0005] In a Chinese patent document with publication number CN115754928A, a dynamic high-precision real-time RF reproduction technology of interference polarization is disclosed, which relates to the field of radar anti-interference technology. The following steps are included: Step 1, develop a fully polarized target and an interference simulator; Step 2, establish an RF array and a feeding system; Step 3, calculate the polarization echo interference simulation; Step 4, combine the constructed target and the polarization model of the interference to calculate the target dynamic echo data under the current posture of the target; Step 5, transmit the signal generated by the target and the interference simulator through the RF array and the feeding system. However, the patent document solves the problem that the traditional RF simulation test system does not care about the polarization characteristics of the signal, can only form a single horizontal polarization or vertical polarization signal environment, and does not have rich polarization information, which is different from the problem to be solved by the present invention. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide a radio frequency signal polarization changing system and method for an array type radio frequency simulation system.

[0007] According to the present invention, a radio frequency signal polarization changing system of an array type radio frequency simulation system includes:

[0008] RF target simulation system, power divider, mechanical switch, polarization analysis unit, vertical polarization fine control chassis, horizontal polarization fine control chassis, polarization control unit, vertical polarization coarse control chassis, horizontal polarization coarse control chassis and dual-polarization conical antenna;

[0009] The mechanical switch includes a first mechanical switch and a second mechanical switch;

[0010] The radio frequency target simulation system is connected to the power divider;

[0011] One output of the power divider is connected to the first mechanical switch;

[0012] One output of the first mechanical switch is connected to the second mechanical switch;

[0013] Another output of the first mechanical switch is connected to a polarization analysis unit;

[0014] The polarization analysis unit is connected to the second mechanical switch;

[0015] The second mechanical switch is connected to the vertical polarization precision control chassis;

[0016] The vertical polarization fine control chassis is connected to the vertical polarization coarse control chassis;

[0017] The vertical polarization coarse control cabinet is connected to the dual-polarization conical antenna;

[0018] Another output of the power divider is connected to a polarization analysis unit;

[0019] The polarization analysis unit is connected to the horizontal polarization precision control chassis;

[0020] The horizontal polarization fine control chassis is connected to the horizontal polarization coarse control chassis;

[0021] The horizontal polarization coarse control cabinet is connected to the dual-polarization conical antenna;

[0022] The polarization control unit is connected to the polarization analysis unit, the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis.

[0023] Preferably, the power divider is used to evenly distribute the power of the radio frequency signal so that the horizontal polarization signal and the vertical polarization signal are equal;

[0024] The mechanical switch is used to switch the link of the radio frequency signal;

[0025] The vertical polarization precision control chassis is used to control the precision of the vertical radiation signal;

[0026] The horizontal polarization precision control chassis is used to control the precision of the horizontal radiation signal;

[0027] The polarization control unit is used to modulate the power ratio and phase difference between the vertical polarization signal and the horizontal polarization signal;

[0028] The vertical polarization coarse control chassis is used for power compensation and triplet allocation of vertical radiation signals;

[0029] The horizontal polarization coarse control chassis is used for power compensation and triplet allocation of horizontal radiation signals;

[0030] The dual-polarized conical antenna is used to receive a vertical input signal and a horizontal input signal and radiate dual-polarized signals.

[0031] Preferably, the polarization control unit is connected to the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis through a control cable, and other devices are connected based on microwave cables.

[0032] Preferably, the polarization analysis unit includes a vertical branch input, a horizontal branch input, a vertical branch output and a horizontal branch output; and the dual-polarization conical antenna includes a vertical polarization input and a horizontal polarization input.

[0033] Preferably, the RF target simulation system is used to release RF signals that meet preset frequency and power requirements; the polarization analysis unit, vertical polarization fine control chassis, vertical polarization coarse control chassis, horizontal polarization fine control chassis and horizontal polarization coarse control chassis all include attenuators and phase modulators.

[0034] A method for changing polarization of radio frequency signals in an array radio frequency simulation system according to the present invention includes:

[0035] RF signal transmission step: controlling the opening and closing of the mechanical switch to transmit the RF signal to the power divider;

[0036] Polarization signal acquisition steps: Use the polarization control unit to control the attenuator and the phase modulator, and then control the radio frequency signal processed by the power divider to obtain the required polarization signal.

[0037] Preferably, the RF signal transmitting step includes transmitting the RF signal to a vertical polarization precision control chassis through a power divider, and radiating the vertical polarization signal at the antenna end; and controlling the opening and closing of a mechanical switch to allow the RF signal to enter a polarization analysis unit.

[0038] Preferably, the polarization signal acquisition step includes:

[0039] The polarization control unit receives the current polarization mode, polarization axis ratio and polarization tilt angle;

[0040] respectively calculating the control words of the attenuator and phase modulator required for the vertical polarization link and the horizontal polarization link of the polarization analysis unit;

[0041] The polarization control unit receives the current position information and respectively calculates the control word of the vertical polarization link and the control word of the horizontal polarization link of the arbitrary polarization target;

[0042] The polarization control unit is instructed to output a control word of the vertical polarization link through the control cable;

[0043] The polarization control unit is instructed to output a control word of a horizontal polarization link through a control cable;

[0044] The polarization control unit is made to control the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis to work in coordination.

[0045] Preferably, the polarization control unit is connected to the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis through a control cable, and other devices are connected based on microwave cables.

[0046] Preferably, the polarization analysis unit includes a vertical branch input, a horizontal branch input, a vertical branch output and a horizontal branch output; and the dual-polarization conical antenna includes a vertical polarization input and a horizontal polarization input.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. The present invention enables the radio frequency target simulation system to release radio frequency signals that meet the frequency and power requirements, and enables the polarization control unit to solve the corresponding control word according to the polarization characteristics, and then controls the polarization analysis unit, the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the attenuator and phase modulator in the horizontal polarization coarse control chassis through the control cable to obtain arbitrary polarization waves that meet the polarization axis ratio and polarization inclination angle, and finally realizes the generation and release of arbitrary polarization waves of target echoes, meeting the semi-physical simulation requirements of various types of aircraft.

[0049] 2. The present invention controls the mechanical switch so that the radio frequency signal passes through the power divider and then directly passes through the vertical polarization precision control chassis, and can radiate the vertical polarization signal at the antenna end; by controlling the mechanical switch so that the radio frequency signal passes through the power divider and then enters the polarization analysis unit, under the control of the polarization control unit, any polarization signal can be radiated at the antenna end, reducing the R&D cost, shortening the development cycle, and having good application prospects.

[0050] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0052] Figure 1 It is a schematic diagram of system connection of the present invention.

[0053] Figure 2 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0055] Reference Figure 1 As shown, a radio frequency signal polarization changing system of an array type radio frequency simulation system comprises:

[0056] Radio frequency target simulation system, power divider, mechanical switch, polarization analysis unit, vertical polarization fine control chassis, horizontal polarization fine control chassis, polarization control unit, vertical polarization coarse control chassis, horizontal polarization coarse control chassis and dual-polarization conical antenna.

[0057] Among them, the power divider is used to evenly distribute the power of the RF signal and keep the horizontal and vertical polarization input signals equal;

[0058] The mechanical switch is used to switch the link of the radio frequency signal and realize the radio frequency switching of different polarization modes;

[0059] The vertical polarization precision control chassis is used for precision control of vertical radiation signals to achieve regional selection and amplitude and phase control of the radiation triplet;

[0060] The horizontal polarization precision control chassis is used for precision control of horizontal radiation signals to achieve regional selection and amplitude and phase control of the radiation triplet;

[0061] The polarization control unit is used to modulate the power ratio and phase difference between the vertical polarization signal and the horizontal polarization signal to achieve any polarization mode;

[0062] The vertical polarization coarse control chassis is used for power compensation and triplet allocation of vertical radiation signals to achieve radiation signal power enhancement and position simulation;

[0063] The horizontal polarization coarse control chassis is used for power compensation and triplet allocation of horizontal radiation signals, realizing radiation signal power enhancement and position simulation;

[0064] The dual-polarized conical antenna is used for receiving a vertical input signal and a horizontal input signal and radiating a dual-polarized signal.

[0065] The various accessories are connected as follows:

[0066] Connecting the output end of the radio frequency target simulation system to the input end of the power divider through a microwave cable;

[0067] Connecting one output of the power divider to the input end of the first mechanical switch through a microwave cable;

[0068] Connecting one output of the first mechanical switch to one input of the second mechanical switch via a microwave cable;

[0069] Connecting another output of the first mechanical switch to the polarization analysis unit;

[0070] connecting the polarization resolving unit to the second mechanical switch;

[0071] Connecting the output end of the second mechanical switch to the input end of the vertical polarization precision control chassis through a microwave cable;

[0072] Connecting the output end of the vertical polarization fine control chassis to the input end of the vertical polarization coarse control chassis through a microwave cable;

[0073] Connecting the output terminal of the vertical polarization coarse control cabinet to the vertical polarization input terminal of the dual-polarization conical antenna through a microwave cable;

[0074] Connecting the other output of the power divider to the horizontal branch input of the polarization analysis unit through a microwave cable;

[0075] Connecting the horizontal branch output end of the polarization analysis unit to the input end of the horizontal polarization precision control chassis through a microwave cable;

[0076] Connecting the output end of the horizontal polarization fine control chassis to the input end of the horizontal polarization coarse control chassis through a microwave cable;

[0077] Connecting the output end of the horizontal polarization coarse control cabinet to the horizontal polarization input end of the dual-polarization conical antenna through a microwave cable;

[0078] The polarization control unit is connected to the polarization analysis unit, the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis through a control cable.

[0079] After the connection is completed, by controlling the first mechanical switch and the second mechanical switch, the RF signal passes through the power divider and then directly passes through the vertical polarization precision control chassis, and the vertical polarization signal can be radiated at the antenna end; by controlling the first mechanical switch and the second mechanical switch, the RF signal passes through the power divider and then enters the polarization analysis unit. Under the control of the polarization control unit, any polarization signal can be radiated at the antenna end.

[0080] The present invention realizes the generation and release of arbitrary polarization waves of target echoes, meets the semi-physical simulation requirements of various aircraft, reduces research and development costs, shortens the development cycle, and has good application prospects.

[0081] Reference Figure 2 As shown, a method for changing polarization of radio frequency signals in an array radio frequency simulation system includes:

[0082] Step 1: Connect the various accessories in the above system;

[0083] Step 2: Under the control of the simulation system, the RF target simulation system releases RF signals that meet the frequency and power requirements. The polarization control unit solves the corresponding control word according to the polarization characteristics, and controls the attenuators and phase modulators in the polarization analysis unit, vertical polarization fine control chassis, vertical polarization coarse control chassis, horizontal polarization fine control chassis, and horizontal polarization coarse control chassis through the control cable to obtain arbitrary polarized waves that meet the polarization axis ratio and polarization inclination.

[0084] Specifically, the control steps of the polarization control unit are as follows:

[0085] Step 2.1: The polarization control unit receives the current polarization mode, polarization axis ratio and polarization tilt angle;

[0086] Step 2.2: Calculate the attenuator and phase modulator control words required for the vertical and horizontal polarization links of the polarization analysis unit respectively to achieve arbitrary polarization target polarization mode and characteristic simulation;

[0087] Step 2.3: The polarization control unit receives the current position information and calculates the vertical polarization link control word and the horizontal polarization link control word of any polarization target respectively;

[0088] Step 2.4: The polarization control unit outputs the vertical polarization link control word through the control cable to simultaneously control the vertical polarization fine control chassis and the vertical polarization coarse control chassis to achieve accurate simulation of the vertical radiation direction of any polarization target position;

[0089] Step 2.5: The polarization control unit outputs the horizontal polarization link control word through the control cable. At the same time, the horizontal radiation direction of any polarization target position is accurately simulated through the horizontal and vertical polarization fine control chassis and the horizontal polarization coarse control chassis.

[0090] Step 2.6: The polarization control unit controls the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis to work together to ensure the accuracy of the radiation position of any polarization target.

[0091] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0092] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A radio frequency signal polarization changing system of an array radio frequency simulation system, characterized in that: It includes a radio frequency target simulation system, a power divider, a mechanical switch, a polarization analysis unit, a vertical polarization fine control chassis, a horizontal polarization fine control chassis, a polarization control unit, a vertical polarization coarse control chassis, a horizontal polarization coarse control chassis and a dual-polarization conical antenna; The mechanical switch includes a first mechanical switch and a second mechanical switch; The radio frequency target simulation system is connected to the power divider; One output of the power divider is connected to the first mechanical switch; One output of the first mechanical switch is connected to the second mechanical switch; Another output of the first mechanical switch is connected to a polarization analysis unit; The polarization analysis unit is connected to the second mechanical switch; The second mechanical switch is connected to the vertical polarization precision control chassis; The vertical polarization fine control chassis is connected to the vertical polarization coarse control chassis; The vertical polarization coarse control cabinet is connected to the dual-polarization conical antenna; Another output of the power divider is connected to a polarization analysis unit; The polarization analysis unit is connected to the horizontal polarization precision control chassis; The horizontal polarization fine control chassis is connected to the horizontal polarization coarse control chassis; The horizontal polarization coarse control cabinet is connected to the dual-polarization conical antenna; The polarization control unit is connected to the polarization analysis unit, the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis.

2. The radio frequency signal polarization changing system of the array type radio frequency simulation system according to claim 1, characterized in that: The power divider is used to evenly distribute the power of the radio frequency signal so that the horizontal polarization signal and the vertical polarization signal are equal; The mechanical switch is used to switch the link of the radio frequency signal; The vertical polarization precision control chassis is used to control the precision of the vertical radiation signal; The horizontal polarization precision control chassis is used to control the precision of the horizontal radiation signal; The polarization control unit is used to modulate the power ratio and phase difference between the vertical polarization signal and the horizontal polarization signal; The vertical polarization coarse control chassis is used for power compensation and triplet allocation of vertical radiation signals; The horizontal polarization coarse control chassis is used for power compensation and triplet allocation of horizontal radiation signals; The dual-polarized conical antenna is used to receive a vertical input signal and a horizontal input signal and radiate dual-polarized signals.

3. The radio frequency signal polarization changing system of the array type radio frequency simulation system according to claim 2, characterized in that: The polarization control unit is connected to the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis through a control cable, and other devices are connected based on microwave cables.

4. The radio frequency signal polarization changing system of the array type radio frequency simulation system according to claim 3, characterized in that: The polarization analysis unit includes a vertical branch input, a horizontal branch input, a vertical branch output and a horizontal branch output; the dual-polarization conical antenna includes a vertical polarization input and a horizontal polarization input.

5. The radio frequency signal polarization changing system of the array type radio frequency simulation system according to claim 1, characterized in that: The radio frequency target simulation system is used to release radio frequency signals that meet preset frequency and power requirements; the polarization analysis unit, the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis and the horizontal polarization coarse control chassis all include attenuators and phase modulators.

6. A method for changing polarization of radio frequency signals in an array type radio frequency simulation system, based on the radio frequency signal changing polarization system in an array type radio frequency simulation system according to any one of claims 1 to 5, characterized in that: include: RF signal transmission step: controlling the opening and closing of the mechanical switch to transmit the RF signal to the power divider; Polarization signal acquisition steps: Use the polarization control unit to control the attenuator and the phase modulator, and then control the radio frequency signal processed by the power divider to obtain the required polarization signal.

7. The method for changing polarization of radio frequency signals in an array radio frequency simulation system according to claim 6, characterized in that: The RF signal transmitting step includes transmitting the RF signal to the vertical polarization precision control chassis through the power divider, radiating the vertical polarization signal at the antenna end; and controlling the opening and closing of the mechanical switch to allow the RF signal to enter the polarization analysis unit.

8. The method for changing polarization of radio frequency signals in an array radio frequency simulation system according to claim 7, characterized in that: The polarization signal acquisition step comprises: The polarization control unit receives the current polarization mode, polarization axis ratio and polarization tilt angle; respectively calculating the control words of the attenuator and phase modulator required for the vertical polarization link and the horizontal polarization link of the polarization analysis unit; The polarization control unit receives the current position information and respectively calculates the control word of the vertical polarization link and the control word of the horizontal polarization link of the arbitrary polarization target; The polarization control unit is instructed to output a control word of the vertical polarization link through the control cable; The polarization control unit is instructed to output a control word of a horizontal polarization link through a control cable; The polarization control unit is made to control the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis to work in coordination.

9. The method for changing polarization of radio frequency signals in an array radio frequency simulation system according to claim 6, characterized in that: The polarization control unit is connected to the vertical polarization fine control chassis, the vertical polarization coarse control chassis, the horizontal polarization fine control chassis, and the horizontal polarization coarse control chassis through a control cable, and other devices are connected based on microwave cables.

10. The method for changing polarization of radio frequency signals in an array radio frequency simulation system according to claim 6, characterized in that: The polarization analysis unit includes a vertical branch input, a horizontal branch input, a vertical branch output and a horizontal branch output; the dual-polarization conical antenna includes a vertical polarization input and a horizontal polarization input.

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