A method for implementing scanning of phased array transmitter

Abstract

The present invention provides a phase array transmitter scanning implementation method, including a main control board, a power amplifier module and a host computer. The main control board adopts MCU, and uses a network port to exchange information with the host computer through the TCP protocol; the algorithm in the main control board can find the required value in the pre-stored phase scanning table, and send the phase value to the corresponding power amplifier respectively; the specific scanning implementation method is to first confirm the horizontal distance and vertical distance of the antenna, the maximum phase delay time and the antenna array arrangement mode, confirm the boundary conditions, that is, the required radiation angle size, use Matlab to solve the implicit function, so as to confirm the boundary, and confirm the spatial scanning interval through the main lobe beam width; the pitch angle and horizontal angle of the confirmed point are brought into the solution to the delay time required for each power amplifier module. The present invention solves the problem of low reliability of passive phase array transmitters and solves the problems of high cost and engineering difficulty of active phase control transmitters.

Description

Technical Field

[0001] The invention belongs to the technical field of radio interference, and in particular relates to a method for realizing scanning of a phase array transmitter. Background Art

[0002] At present, the known phase array transmitter scanning technology is mainly divided into two categories, one is the active phase control transmitter, which is characterized by each antenna unit equipped with a transmitting and receiving component, and the other is the passive phase control transmitter, which is characterized by only one central transmitter and one receiver. Both types of phase control transmitters can achieve full space scanning of the target space in a very short time, but the active phase control transmitter has the problem of high cost and high engineering difficulty, and the passive phase control transmitter has the problem of power, efficiency, beam control and reliability not as good as the active phase transmitter.

[0003] Aiming at the shortcomings of high cost and great engineering difficulty of active phase control transmitter and low reliability of passive phase control transmitter, a scanning implementation method of phase array transmitter is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a phase array transmitter scanning implementation method in view of the above-mentioned deficiencies in the prior art, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a phase array transmitter scanning implementation method, including a main control board, a power amplifier module and a host computer, the main control board adopts MCU, and uses a network port to exchange information with the host computer through the TCP protocol;

[0006] The algorithm in the main control board can search for the required value in the pre-stored phase scan table and send the phase value to the corresponding power amplifier;

[0007] The specific scanning implementation method includes the following steps:

[0008] S1: Confirm the horizontal distance of the antenna and vertical distance , Maximum phase delay time and antenna array arrangement;

[0009] S2: Confirm the boundary conditions, i.e. the required radiation angle;

[0010] S3: Use Matlab to solve the implicit function to confirm the boundary. The implicit function is as follows:

[0011]

[0012] in, The number of columns of the power amplifier array minus one;

[0013] The number of columns of the power amplifier array minus one;

[0014] is the vertical distance between antennas;

[0015] is the horizontal distance of the antenna;

[0016] is the pitch angle of the wave;

[0017] is the horizontal angle of the wave;

[0018] is the speed of light;

[0019] The maximum time that the phase delayer can delay;

[0020] S4: confirm the spatial scanning interval by the main lobe beam width;

[0021] S5: Substitute the pitch angle and horizontal angle of the confirmation point into the solution to find out the delay time required for each power amplifier module.

[0022] Furthermore, the communication between the main control board and the power amplifier module arranged in each antenna unit adopts four-wire RS485, and the phase scanning function is triggered by a differential controller.

[0023] Further, in S5, the antenna distance, angle range and angle step confirmed in S4 are used as input quantities, and two FOR loops and an IF conditional judgment statement are used to judge the boundary conditions, so as to calculate the phase delay time required for each angle;

[0024] The first FOR loop is used to increase the horizontal angle, and the second FOR loop is used to increase the pitch angle. The pitch and horizontal time calculations are shown below:

[0025]

[0026] Wherein, t is the calculated time;

[0027] N is the number of columns of the power amplifier array minus one;

[0028] d is the antenna spacing;

[0029] is the angle of the wave;

[0030] is the speed of light;

[0031] When a negative number is calculated in a row or column, you need to subtract the smallest negative number calculated in this row or column to turn it into a positive number.

[0032] Furthermore, after obtaining the calculation results, they are stored in the memory of the single-chip computer. When the phase scanning instruction needs to be executed, it is called in the required order and the related instructions are composed and sent to each power amplifier through RS485. The power amplifier receives the instruction and stores each delay time in the memory, waiting for the arrival of the differential trigger signal;

[0033] When the phase scan start instruction is executed, the MCUs in the sixteen power amplifiers are interrupted simultaneously through the differential signal trigger, and the phase scan function is executed in sequence according to the corresponding time intervals.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] Each antenna of the phase array transmitter of the present invention is equipped with a transmitting component and only has one receiver, thereby solving the problem of low reliability of passive phase array transmitters and providing a phase algorithm adapted thereto, thereby shortening the development cycle and time, and solving the problems of high cost and great engineering difficulty of active phase control transmitters. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall implementation architecture of the present invention;

[0037] Figure 2 It is the antenna array arrangement method in the embodiment of the present invention;

[0038] Figure 3 is a phase scanning range diagram of two different antenna spacings in an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the phase delay time calculation process in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, the present invention provides a technical solution: a phase array transmitter scanning implementation method, including a main control board, a power amplifier module and a host computer, the main control board adopts MCU, and uses a network port to exchange information with the host computer through the TCP protocol;

[0042] The communication between the main control board and the power amplifier module set in each antenna unit adopts four-wire RS485, and the phase scanning function is triggered by a differential controller;

[0043] The algorithm in the main control board can search for the required value in the pre-stored phase scan table and send the phase value to the corresponding power amplifier;

[0044] The specific scanning implementation method includes the following steps:

[0045] S1: Confirm the horizontal distance of the antenna and vertical distance , Maximum phase delay time and antenna array arrangement; wherein the antenna array arrangement is as follows Figure 2 As shown, in the figure, the numbers 1 to 16 represent sixteen power amplifier numbers, X represents the horizontal azimuth, and Y represents the elevation azimuth.

[0046] S2: Confirm the boundary conditions, i.e. the required radiation angle;

[0047] S3: Use Matlab to solve the implicit function to confirm the boundary. The implicit function is as follows:

[0048]

[0049] in, The number of columns of the power amplifier array minus one;

[0050] The number of columns of the power amplifier array minus one;

[0051] is the vertical distance between antennas;

[0052] is the horizontal distance of the antenna;

[0053] is the pitch angle of the wave;

[0054] is the horizontal angle of the wave;

[0055] is the speed of light;

[0056] The maximum time that the phase delayer can delay;

[0057] S4: confirm the spatial scanning interval by the main lobe beam width;

[0058] S5: Substitute the pitch angle and horizontal angle of the confirmation point into the solution to obtain the delay time required for each power amplifier module;

[0059] The specific calculation logic is as follows: Figure 4 As shown, the antenna distance, angle range and angle step confirmed in S4 are used as input quantities, and then two FOR loops and an IF conditional judgment statement are used to judge the boundary conditions, so as to calculate the phase delay time required for each angle;

[0060] The first FOR loop is used to increase the horizontal angle, and the second FOR loop is used to increase the pitch angle. The pitch and horizontal time calculations are shown below:

[0061]

[0062] Wherein, t is the calculated time;

[0063] N is the number of columns of the power amplifier array minus one;

[0064] d is the antenna spacing;

[0065] is the angle of the wave;

[0066] is the speed of light;

[0067] When a negative number is calculated in a row or column, you need to subtract the smallest negative number calculated in this row or column to turn it into a positive number.

[0068] After the calculation results are obtained, they are stored in the memory of the single-chip computer. When the phase scanning instruction needs to be executed, it is called in the required order and the related instructions are composed and sent to each power amplifier through RS485. The power amplifier receives the instruction and stores each delay time in the memory, waiting for the arrival of the differential trigger signal.

[0069] When the phase scan start instruction is executed, the MCUs in the sixteen power amplifiers are interrupted simultaneously through the differential signal trigger, and the phase scan function is executed in sequence according to the corresponding time intervals.

[0070] When used specifically, , or , and The range is , When , the boundary is obtained as Figure 3 As shown: Wherein, the horizontal axis is the horizontal angle, and the vertical axis is the pitch angle, and the unit is degree;

[0071] The points inside the middle rectangle plus circles represent points that can be scanned when the antenna distance is 110 mm and 55 mm; the points outside the middle rectangle plus circles represent points that can be scanned when the antenna distance is 55 mm.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A phase array transmitter scanning implementation method, characterized in that: It includes a main control board, a power amplifier module and a host computer. The main control board uses an MCU and uses the network port to exchange information with the host computer through the TCP protocol. The algorithm in the main control board can search for the required value in the pre-stored phase scan table and send the phase value to the corresponding power amplifier; The specific scanning implementation method includes the following steps: S1: Confirm the vertical distance of the antenna and horizontal distance , Maximum phase delay time and antenna array arrangement; S2: Confirm the boundary conditions, i.e. the required radiation angle; S3: Use Matlab to solve the implicit function to confirm the boundary. The implicit function is as follows: ； in, The number of columns of the power amplifier array minus one; The number of rows of the power amplifier array minus one; is the vertical distance between antennas; is the horizontal distance of the antenna; is the pitch angle of the wave; is the horizontal angle of the wave; C is the speed of light; The maximum time that the phase delayer can delay; S4: confirm the spatial scanning interval by the main lobe beam width; S5: Substitute the pitch angle and horizontal angle of the confirmation point into the solution to find out the delay time required for each power amplifier module.

2. A phase array transmitter scanning implementation method according to claim 1, characterized in that: The communication between the main control board and the power amplifier module arranged in each antenna unit adopts four-wire RS485, and the phase scanning function is triggered by a differential controller.

3. A phased array transmitter scanning implementation method according to claim 2, characterized in that: In S5, the antenna distance, angle range and angle step confirmed in S1 to S4 are used as input quantities, and two FOR loops and an IF conditional judgment statement are used to judge the boundary conditions, so as to calculate the phase delay time required for each angle; The first FOR loop is used to increase the pitch angle, and the second FOR loop is used to increase the horizontal angle. The pitch and horizontal time calculations are shown below: ; Wherein, t is the calculated time; N is the number of columns of the power amplifier array minus one; d is the antenna spacing; is the angle of the wave; C is the speed of light; When a negative number is calculated in a row or column, you need to subtract the smallest negative number calculated in this row or column to turn it into a positive number.

4. A phase array transmitter scanning implementation method according to claim 3, characterized in that: After the calculation result t is obtained, it is stored in the memory of the single-chip computer. When the phase scanning instruction needs to be executed, it is called in the required order and the related instructions are composed and sent to each power amplifier through RS485. The power amplifier receives the instruction and stores each delay time in the memory, waiting for the arrival of the differential trigger signal; When the phase scan start instruction is executed, the MCUs in the sixteen power amplifiers are interrupted simultaneously through the differential signal trigger, and the phase scan function is executed in sequence according to the corresponding time intervals.

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