Off-field correction device and method in conformal array plane antenna channel

Abstract

The invention discloses an off-field correction device and method in a conformal array plane antenna channel, and the device comprises a first array plane, a second array plane, a third array plane, a fourth array plane, a fifth array plane, and an external correction antenna probe, and the first array plane, the second array plane, the third array plane, the fourth array plane, and the fifth array plane are all provided with a plurality of antenna array elements. The plurality of antenna array elements are in one-to-one correspondence with the plurality of transmitting channels and the plurality of receiving channels; when the external correction antenna probe is arranged along the central normal of the second array plane, the receiving end / transmitting end of the external correction antenna probe is in communication connection with the plurality of transmitting channels / receiving channels of the first array plane, the second array plane and the third array plane; and when the external correction antenna probe is arranged along the central normal of the fourth array plane, the receiving end / transmitting end of the external correction antenna probe is in communication connection with the plurality of transmitting channels / receiving channels of the third array plane, the fourth array plane and the fifth array plane. According to the device and the method, the out-of-field correction of the conformal array plane antenna channel is realized, and the system error of the out-of-field correction is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of phased array antenna channel correction, and in particular to an out-of-field correction device and method for a conformal array antenna channel. Background Art

[0002] As an advanced antenna technology, conformal array antennas can be perfectly integrated with the carrier surface, which can not only significantly save space and effectively reduce air resistance, but also improve the radiation performance and directivity of the antenna. Therefore, they have been increasingly used in the fields of radar and wireless communications. The array of phased array antennas contains multiple transmit and receive channels. Due to the differences in frequency response between channels, precise calibration measurements and corresponding compensation are required.

[0003] For common planar regular arrays, high-precision correction methods usually involve near-field external correction, which is usually completed under darkroom conditions. However, conformal array antennas are different from traditional planar regular array antennas, and their shape is not a simple planar structure. For example, vehicle-mounted conformal array antennas usually have an "arch" shape. This special structure makes it very difficult to perform near-field external correction under conventional darkroom conditions, especially when the antenna is large, it is even more difficult to place it in a darkroom for accurate measurement. In order to overcome the above limitations, a feasible method is to perform external correction outside the darkroom. However, this method has its inherent problems: during external correction, the correction antenna probe needs to be placed at different positions, and each position can only cover part of the conformal array antenna. The results of multiple external corrections need to cover all the conformal array antennas. Measurement errors may be introduced between multiple correction measurements, and the support rod of the correction antenna probe may shake due to factors such as wind force, thermal expansion and contraction, and ultimately introduce systematic errors between multiple measurements, resulting in inaccurate full array external correction results. This inaccuracy will ultimately affect the quality of beamforming and reduce the overall performance of the system.

[0004] In view of this situation, it is necessary to study a method to solve the difficulties faced by the external correction technology of conformal array antennas. This method should be able to eliminate the systematic errors introduced in multiple external correction processes, realize the external correction of the conformal array antenna in the whole array channel with high precision, and ensure the quality of the antenna beam forming in all directions. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes an out-of-field correction device and method in a conformal array antenna channel.

[0006] The present invention proposes an out-of-field correction device in a conformal array antenna channel, comprising a first array, a second array, a third array, a fourth array, a fifth array, and an external correction antenna probe, wherein the first array, the second array, the third array, the fourth array, and the fifth array are all provided with a plurality of antenna array elements; the plurality of antenna array elements correspond one to one to a plurality of transmitting channels and a plurality of receiving channels; when the external correction antenna probe is arranged along the central normal of the second array, the receiving end / transmitting end of the external correction antenna probe is all communicatively connected with the plurality of transmitting channels / receiving channels of the first array, the second array, and the third array; when the external correction antenna probe is arranged along the central normal of the fourth array, the receiving end / transmitting end of the external correction antenna probe is all communicatively connected with the plurality of transmitting channels / receiving channels of the third array, the fourth array, and the fifth array.

[0007] Preferably, when the external correction antenna probe is arranged along the center normal of the second array face and the receiving end of the external correction antenna probe is communicatively connected with multiple transmission channels of the first array face, the second array face and the third array face, the position of the external correction antenna probe on the center normal of the second array face is taken as the first position, the multiple transmission channels of the first array face, the second array face and the third array face send out transmission correction excitation signal a, and the external correction antenna probe receives the transmission correction excitation signal a;

[0008] When the external correction antenna probe is arranged along the center normal of the fourth array and the receiving end of the external correction antenna probe is communicatively connected with multiple transmitting channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the center normal of the fourth array is taken as the second position, the multiple transmitting channels of the third array, the fourth array and the fifth array send out a transmitting correction excitation signal a, and the correction antenna probe receives the transmitting correction excitation signal a.

[0009] Preferably, when the external correction antenna probe is arranged along the center normal of the second array face and the transmitting end of the external correction antenna probe is communicatively connected with the multiple receiving channels of the first array face, the second array face and the third array face, the position of the external correction antenna probe on the center normal of the second array face is taken as the third position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the first array face, the second array face and the third array face receive the receiving correction excitation signal f;

[0010] When the external correction antenna probe is arranged along the central normal of the fourth array and the transmitting end of the external correction antenna probe is communicatively connected with multiple receiving channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the central normal of the fourth array is taken as the fourth position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the third array, the fourth array and the fifth array receive the receiving correction excitation signal f.

[0011] Preferably, the transmission correction excitation signal a is a linear frequency modulation signal S with the carrier frequency as the center frequency. a (t), linear frequency modulation signal S a The expression of (t) is as follows:

[0012] S a (t) = Acos(2πf carrier t+πKt 2 );

[0013] Among them, S a (t) is the emission correction excitation signal a; f carrier is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the transmitted correction excitation signal a, τ is the time width of the transmitted correction excitation signal a.

[0014] Preferably, the received correction excitation signal f is a linear frequency modulation signal S with the carrier frequency as the center frequency. f (t), linear frequency modulation signal S f The expression of (t) is as follows:

[0015] S f (t) = Acos(2πf RF t+πKt 2 );

[0016] Among them, S f (t) is the received correction excitation signal f; f RF is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the received correction excitation signal f, τ is the time width of the received correction excitation signal f.

[0017] The present invention proposes an out-of-field correction method in a conformal array antenna channel, which is applied to any of the above-mentioned out-of-field correction devices in a conformal array antenna channel, and the method comprises the following steps:

[0018] S1. Obtain the transceiver type of out-of-field correction in the antenna array, and select to execute the transmission channel out-of-channel correction strategy or the receiving channel out-of-channel correction strategy according to the transceiver type, wherein the transceiver type includes the receiving channel out-of-channel correction and the transmission channel out-of-channel correction;

[0019] S2. When the transceiver type is specifically a transmission channel out-of-correction, the transmission channel out-of-correction strategy is executed;

[0020] S3. When the transceiver type is specifically a receive channel out-of-correction, execute a receive channel out-of-correction strategy;

[0021] S4. Perform out-of-field correction on the antenna array surface according to the execution result of the transmission channel out-of-channel correction strategy or the reception channel out-of-channel correction strategy.

[0022] Preferably, the emission channel out-of-channel correction strategy specifically includes:

[0023] The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the first array, the second array, and the third array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data b of the transmission channels of the first array, the second array, and the third array;

[0024] The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the third array, the fourth array and the fifth array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data c of the transmission channels of the third array, the fourth array and the fifth array;

[0025] Subtract the original external correction data b from the original external correction data c of each transmission channel corresponding to the third array, and then calculate the average error of all transmission channels corresponding to the third array, so as to obtain the average error data d of the external correction of two transmissions;

[0026] The original external correction data b of each transmission channel of the first array, the second array and the third array are directly used as the final transmission external correction data e of the first array, the second array and the third array, and the original external correction data c of each transmission channel of the fourth array and the fifth array minus the average error data d is used as the final transmission external correction data e of the fourth array and the fifth array.

[0027] Preferably, the correction strategy outside the receiving channel specifically includes:

[0028] The transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and each receiving channel of the first array, the second array, and the third array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain the original external correction data g of each receiving channel of the first array, the second array, and the third array;

[0029] The transmitting end of the external correction antenna probe sends out a receiving correction excitation signal f, and each receiving channel of the third array, the fourth array, and the fifth array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain original external correction data h of each receiving channel of the third array, the fourth array, and the fifth array;

[0030] Subtract the original external correction data h from the original external correction data g of each receiving channel corresponding to the third array, and then calculate the average error of all receiving channels corresponding to the third array to obtain the average error data i of the two receiving external corrections;

[0031] The original external correction data g is directly used as the final received external correction data j of the first, second and third arrays, and the result of subtracting the average error data i from the original external correction data h of each transmitting channel of the fourth and fifth arrays is used as the final received external correction data j of the fourth and fifth arrays.

[0032] Preferably, the preprocessing specifically includes:

[0033] The received transmission correction excitation signal a / receiving correction excitation signal f is down-converted, digitized and synchronously collected, and the wave path difference between the antenna array element and the external correction antenna probe and the antenna array element radiation pattern are removed.

[0034] Preferably, the path difference between the antenna array element and the external correction antenna probe and the antenna array element directional pattern are removed according to the following formula:

[0035]

[0036] Among them, s 2i (n) is the external correction data after removing the wave path difference and antenna element radiation pattern; s 1i (n) is the external correction data before removing the wave path difference and antenna element radiation pattern; τ i is the physical path delay difference between the antenna array element and the external correction antenna probe, τ i =(L max -L i ) / c,L max is the maximum wave range, L i is the wave path corresponding to each antenna array element, c is the speed of light; f s is the data sampling rate; A i and are the normalized amplitude and phase of the directional pattern of the antenna array element toward the outward correction antenna probe direction; f RF is the difference between the center frequency of the correction excitation signal and the center frequency of the external correction data; i is the antenna array element number; n is an integer between [0, N], and N is the number of data sampling points; e is the natural base; j is

[0037] In the present invention, the proposed device and method for out-of-field correction in the channel of a conformal array antenna obtains the transceiver type of out-of-field correction in the antenna array, and selects to execute a transmission channel out-of-channel correction strategy or a receiving channel out-of-channel correction strategy according to the transceiver type, wherein the transceiver type includes a receiving channel out-of-channel correction and a transmission channel out-of-channel correction; when the transceiver type is specifically a transmission channel out-of-channel correction, the transmission channel out-of-channel correction strategy is executed; when the transceiver type is specifically a receiving channel out-of-channel correction, the receiving channel out-of-channel correction strategy is executed; according to the execution result of the transmission channel out-of-channel correction strategy or the receiving channel out-of-channel correction strategy, the antenna array is subjected to out-of-field correction. The present invention provides a reliable solution for out-of-field correction of conformal array antenna transceivers, and is particularly suitable for situations where the antenna scale is large. The present invention adopts an out-of-field correction method to solve the problem that out-of-field correction of conformal array antennas is difficult to perform under conventional darkroom conditions, and at the same time uses the difference between the measurement results of the common array in two measurement processes to correct the external correction measurement results, thereby eliminating the unavoidable system errors introduced between the two external corrections. The present invention ultimately reduces the environmental condition requirements and realizes high-precision off-field correction of the full array channel of the conformal array antenna, ensuring the quality of the antenna beamforming in all directions. At the same time, the present invention does not change the hardware architecture of the system and does not add additional test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic structural diagram of the antenna array and the external correction antenna probe distribution of an external correction device in a conformal array antenna channel proposed by the present invention;

[0039] Figure 2 The present invention is a schematic diagram of the working process of an out-of-field correction method in a conformal array antenna channel proposed by the present invention. DETAILED DESCRIPTION

[0040] Reference Figure 1 and Figure 2 The present invention proposes an out-of-field correction device in a conformal array antenna channel, comprising a first array, a second array, a third array, a fourth array, a fifth array, and an external correction antenna probe, wherein the first array, the second array, the third array, the fourth array, and the fifth array are each provided with a plurality of antenna array elements; the plurality of antenna array elements correspond one to one to a plurality of transmitting channels and a plurality of receiving channels; when the external correction antenna probe is arranged along the central normal of the second array, the receiving end / transmitting end of the external correction antenna probe is communicatively connected with the plurality of transmitting channels / receiving channels of the first array, the second array, and the third array; when the external correction antenna probe is arranged along the central normal of the fourth array, the receiving end / transmitting end of the external correction antenna probe is communicatively connected with the plurality of transmitting channels / receiving channels of the third array, the fourth array, and the fifth array.

[0041] In this embodiment, the external correction antenna probe may be disposed on the center normal of the second array plane or the fourth array plane through a supporting member, and the supporting member may be a supporting rod fixed on the ground.

[0042] Specifically, when the external correction antenna probe is arranged along the center normal of the second array and the receiving end of the external correction antenna probe is communicatively connected with multiple transmission channels of the first array, the second array, and the third array, the position of the external correction antenna probe on the center normal of the second array is taken as the first position, the multiple transmission channels of the first array, the second array, and the third array send out a transmission correction excitation signal a, and the external correction antenna probe receives the transmission correction excitation signal a.

[0043] When the external correction antenna probe is located at the first position, the wave path L between each antenna array element of the first array plane, the second array plane, and the third array plane and the external correction antenna probe is calculated. Ai , that is, the distance between the antenna element and the external correction antenna probe, the subscript i represents the antenna element number, and the subscript A represents the first position.

[0044] When the external correction antenna probe is arranged along the center normal of the fourth array and the receiving end of the external correction antenna probe is communicatively connected with multiple transmitting channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the center normal of the fourth array is taken as the second position, the multiple transmitting channels of the third array, the fourth array and the fifth array send out a transmitting correction excitation signal a, and the correction antenna probe receives the transmitting correction excitation signal a.

[0045] When the external correction antenna probe is located at the second position, calculate the wave path L between each antenna array element of the third array plane, the fourth array plane, and the fifth array plane and the external correction antenna probe Bi , the subscript i represents the antenna element number, and the subscript B represents the second position.

[0046] In this embodiment, the transmission correction excitation signal a is a linear frequency modulation signal S with the carrier frequency as the center frequency. a (t), linear frequency modulation signal S a The expression of (t) is as follows:

[0047] S a (t) = Acos(2πf carrier t+πKt 2 );

[0048] Among them, S a (t) is the emission correction excitation signal a; f carrier is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the transmitted correction excitation signal a, τ is the time width of the transmitted correction excitation signal a.

[0049] Specifically, when the external correction antenna probe is arranged along the center normal of the second array and the transmitting end of the external correction antenna probe is communicatively connected with multiple receiving channels of the first array, the second array, and the third array, the position of the external correction antenna probe on the center normal of the second array is taken as the third position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the first array, the second array, and the third array receive the receiving correction excitation signal f.

[0050] When the external correction antenna probe is located at the third position, calculate the wave path L between each antenna array element of the first array plane, the second array plane, and the third array plane and the external correction antenna probe Ci , subscript i represents the antenna element number, and subscript C represents the third position.

[0051] When the external correction antenna probe is arranged along the central normal of the fourth array and the transmitting end of the external correction antenna probe is communicatively connected with multiple receiving channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the central normal of the fourth array is taken as the fourth position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the third array, the fourth array and the fifth array receive the receiving correction excitation signal f.

[0052] When the external correction antenna probe is located at the fourth position, the wave path L between each antenna array element of the third array plane, the fourth array plane, and the fifth array plane and the external correction antenna probe is calculated. Di , subscript i represents the antenna element number, and subscript D represents the fourth position.

[0053] In this embodiment, the received correction excitation signal f is a linear frequency modulation signal S with the carrier frequency as the center frequency. f (t), linear frequency modulation signal S f The expression of (t) is as follows:

[0054] S f (t) = Acos(2πf RF t+πKt 2 );

[0055] Among them, S f (t) is the received correction excitation signal f; f RF is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the received correction excitation signal f, τ is the time width of the received correction excitation signal f.

[0056] In this embodiment, the out-of-channel correction of the array transmission channel and the out-of-channel correction of the array reception channel are independent of each other, the first position and the third position may not overlap, the second position and the fourth position may not overlap, and the out-of-channel correction of the transmission channel or the out-of-channel correction of the reception channel is selected according to the transceiver type of the antenna array.

[0057] In this embodiment, the distance between the position of the external correction antenna probe and the geometric center O2 or O4 of the second array or the fourth array respectively satisfies the mid-field condition of the antenna.

[0058] In this embodiment, the transmitting correction excitation signal a and the receiving correction excitation signal f need to be synchronously generated and collected under the control of the synchronization signal, and the correction excitation signal generation and collection are coherent with the clocks used.

[0059] Reference Figure 1 and Figure 2 The present invention proposes an out-of-field correction method in a conformal array antenna channel, which is applied to any of the above-mentioned out-of-field correction devices in a conformal array antenna channel. The method comprises the following steps:

[0060] S1. Obtain the transceiver type of out-of-field correction in the antenna array, and select to execute the transmission channel out-of-channel correction strategy or the receiving channel out-of-channel correction strategy according to the transceiver type. The transceiver type includes the receiving channel out-of-channel correction and the transmission channel out-of-channel correction.

[0061] S2. When the transceiver type is specifically the transmission channel out-of-correction, the transmission channel out-of-correction strategy is executed.

[0062] In this embodiment, the emission channel out-of-channel correction strategy specifically includes:

[0063] The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the first array, the second array, and the third array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data b of the transmission channels of the first array, the second array, and the third array;

[0064] The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the third array, the fourth array and the fifth array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data c of the transmission channels of the third array, the fourth array and the fifth array;

[0065] Subtract the original external correction data b from the original external correction data c of each transmission channel corresponding to the third array, and then calculate the average error of all transmission channels corresponding to the third array, so as to obtain the average error data d of the external correction of two transmissions;

[0066] The original external correction data b of each transmission channel of the first array, the second array and the third array are directly used as the final transmission external correction data e of the first array, the second array and the third array, and the original external correction data c of each transmission channel of the fourth array and the fifth array minus the average error data d is used as the final transmission external correction data e of the fourth array and the fifth array.

[0067] S3. When the transceiver type is specifically the receive channel out-of-correction, execute the receive channel out-of-correction strategy.

[0068] In this embodiment, the correction strategy outside the receiving channel specifically includes:

[0069] The transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and each receiving channel of the first array, the second array, and the third array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain the original external correction data g of each receiving channel of the first array, the second array, and the third array;

[0070] The transmitting end of the external correction antenna probe sends out a receiving correction excitation signal f, and each receiving channel of the third array, the fourth array, and the fifth array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain original external correction data h of each receiving channel of the third array, the fourth array, and the fifth array;

[0071] Subtract the original external correction data h from the original external correction data g of each receiving channel corresponding to the third array, and then calculate the average error of all receiving channels corresponding to the third array to obtain the average error data i of the two receiving external corrections;

[0072] The original external correction data g is directly used as the final received external correction data j of the first, second and third arrays, and the result of subtracting the average error data i from the original external correction data h of each transmitting channel of the fourth and fifth arrays is used as the final received external correction data j of the fourth and fifth arrays.

[0073] In this embodiment, the preprocessing specifically includes:

[0074] The received transmission correction excitation signal a / receiving correction excitation signal f is down-converted, digitized and synchronously collected, and the wave path difference between the antenna array element and the external correction antenna probe and the antenna array element radiation pattern are removed.

[0075] In this embodiment, the path difference between the antenna array element and the external correction antenna probe and the antenna array element radiation pattern are removed according to the following formula:

[0076]

[0077] Among them, s 2i (n) is the external correction data after removing the wave path difference and antenna element radiation pattern; s 1i (n) is the external correction data before removing the wave path difference and antenna element radiation pattern; τ i is the physical path delay difference between the antenna array element and the external correction antenna probe, τ i =(L max-L i ) / c,L max is the maximum wave range, L i is the wave path corresponding to each antenna array element, c is the speed of light; f s is the data sampling rate; A i and are the normalized amplitude and phase of the directional pattern of the antenna array element toward the outward correction antenna probe direction; f RF is the difference between the center frequency of the correction excitation signal and the center frequency of the external correction data; i is the antenna array element number; n is an integer between [0, N], and N is the number of data sampling points; e is the natural base; j is

[0078] S4. Perform out-of-field correction on the antenna array surface according to the execution result of the transmission channel out-of-channel correction strategy or the reception channel out-of-channel correction strategy.

[0079] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An out-of-field correction device in a conformal array antenna channel, characterized in that: It includes a first array, a second array, a third array, a fourth array, a fifth array, and an external correction antenna probe, wherein a plurality of antenna array elements are arranged on the first array, the second array, the third array, the fourth array, and the fifth array; the plurality of antenna array elements correspond to a plurality of transmitting channels and a plurality of receiving channels one by one; when the external correction antenna probe is arranged along the central normal of the second array, the receiving end / transmitting end of the external correction antenna probe is communicatively connected with the plurality of transmitting channels / receiving channels of the first array, the second array, and the third array; when the external correction antenna probe is arranged along the central normal of the fourth array, the receiving end / transmitting end of the external correction antenna probe is communicatively connected with the plurality of transmitting channels / receiving channels of the third array, the fourth array, and the fifth array.

2. The out-of-field correction device in the conformal array antenna channel according to claim 1, characterized in that: When the external correction antenna probe is arranged along the center normal of the second array face and the receiving end of the external correction antenna probe is communicatively connected with multiple transmission channels of the first array face, the second array face and the third array face, the position of the external correction antenna probe on the center normal of the second array face is taken as the first position, the multiple transmission channels of the first array face, the second array face and the third array face send out transmission correction excitation signals a, and the external correction antenna probe receives the transmission correction excitation signals a; When the external correction antenna probe is arranged along the center normal of the fourth array and the receiving end of the external correction antenna probe is communicatively connected with multiple transmitting channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the center normal of the fourth array is taken as the second position, the multiple transmitting channels of the third array, the fourth array and the fifth array send out a transmitting correction excitation signal a, and the correction antenna probe receives the transmitting correction excitation signal a.

3. The out-of-field correction device in the conformal array antenna channel according to claim 1, characterized in that: When the external correction antenna probe is arranged along the center normal of the second array face and the transmitting end of the external correction antenna probe is communicatively connected with the multiple receiving channels of the first array face, the second array face and the third array face, the position of the external correction antenna probe on the center normal of the second array face is taken as the third position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the first array face, the second array face and the third array face receive the receiving correction excitation signal f; When the external correction antenna probe is arranged along the central normal of the fourth array and the transmitting end of the external correction antenna probe is communicatively connected with multiple receiving channels of the third array, the fourth array and the fifth array, the position of the external correction antenna probe on the central normal of the fourth array is taken as the fourth position, the transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and the multiple receiving channels of the third array, the fourth array and the fifth array receive the receiving correction excitation signal f.

4. The out-of-field correction device in the conformal array antenna channel according to claim 2, characterized in that: The transmission correction excitation signal a is a linear frequency modulation signal S with the carrier frequency as the center frequency. a (t), linear frequency modulation signal S a The expression of (t) is as follows: S a (t)=Acos(2πf carrier t+πKt 2 ); Among them, S a (t) is the emission correction excitation signal a; f carrier is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the transmitted correction excitation signal a, τ is the time width of the transmitted correction excitation signal a.

5. The out-of-field correction device in the conformal array antenna channel according to claim 3, characterized in that: The received correction excitation signal f is a linear frequency modulation signal S with the carrier frequency as the center frequency. f (t), linear frequency modulation signal S f The expression of (t) is as follows: S f (t)=Acos(2πf RF t+πKt 2 ); Among them, S f (t) is the received correction excitation signal f; f RF is the carrier frequency; K is the modulation slope, K=BW / τ, BW is the bandwidth of the received correction excitation signal f, τ is the time width of the received correction excitation signal f.

6. A method for out-of-field correction in a conformal array antenna channel, characterized in that: Applicable to the out-of-field correction device in the conformal array antenna channel according to any one of claims 1 to 5, the method comprises the following steps: S1. Obtain the transceiver type of out-of-field correction in the antenna array, and select to execute the transmission channel out-of-channel correction strategy or the receiving channel out-of-channel correction strategy according to the transceiver type, wherein the transceiver type includes the receiving channel out-of-channel correction and the transmission channel out-of-channel correction; S2. When the transceiver type is specifically a transmission channel out-of-correction, the transmission channel out-of-correction strategy is executed; S3. When the transceiver type is specifically a receive channel out-of-correction, execute a receive channel out-of-correction strategy; S4. Performing mid-field out-of-field correction on the antenna array surface according to the execution result of the transmission channel out-of-channel correction strategy or the reception channel out-of-channel correction strategy.

7. The out-of-field correction method in the conformal array antenna channel according to claim 6, characterized in that: The emission channel out-of-channel correction strategy specifically includes: The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the first array, the second array, and the third array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data b of the transmission channels of the first array, the second array, and the third array; The receiving end of the external correction antenna probe receives the transmission correction excitation signals a from the transmission channels corresponding to the third array, the fourth array and the fifth array in sequence, and pre-processes the received transmission correction excitation signals a to obtain the original external correction data c of the transmission channels of the third array, the fourth array and the fifth array; Subtract the original external correction data b from the original external correction data c of each transmission channel corresponding to the third array, and then calculate the average error of all transmission channels corresponding to the third array, so as to obtain the average error data d of the external correction of two transmissions; The original external correction data b of each transmission channel of the first array, the second array and the third array are directly used as the final transmission external correction data e of the first array, the second array and the third array, and the original external correction data c of each transmission channel of the fourth array and the fifth array minus the average error data d is used as the final transmission external correction data e of the fourth array and the fifth array.

8. The out-of-field correction method in the conformal array antenna channel according to claim 6, characterized in that: The receiving channel out-of-channel correction strategy specifically includes: The transmitting end of the external correction antenna probe sends a receiving correction excitation signal f, and each receiving channel of the first array, the second array, and the third array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain the original external correction data g of each receiving channel of the first array, the second array, and the third array; The transmitting end of the external correction antenna probe sends out a receiving correction excitation signal f, and each receiving channel of the third array, the fourth array, and the fifth array receives the receiving correction excitation signal f, and pre-processes the received receiving correction excitation signal f to obtain original external correction data h of each receiving channel of the third array, the fourth array, and the fifth array; Subtract the original external correction data h from the original external correction data g of each receiving channel corresponding to the third array, and then calculate the average error of all receiving channels corresponding to the third array to obtain the average error data i of the two receiving external corrections; The original external correction data g is directly used as the final received external correction data j of the first, second and third arrays, and the result of subtracting the average error data i from the original external correction data h of each transmitting channel of the fourth and fifth arrays is used as the final received external correction data j of the fourth and fifth arrays.

9. The out-of-field correction method in the conformal array antenna channel according to claim 7 or 8, characterized in that: The pre-processing specifically includes: The received transmission correction excitation signal a / receiving correction excitation signal f is down-converted, digitized and synchronously collected, and the wave path difference between the antenna array element and the external correction antenna probe and the antenna array element radiation pattern are removed.

10. The out-of-field correction method in the conformal array antenna channel according to claim 9, characterized in that: The path difference between the antenna element and the external correction antenna probe and the antenna element radiation pattern are removed according to the following formula: Among them, s 2i (n) is the external correction data after removing the wave path difference and antenna element radiation pattern; s 1i (n) is the external correction data before removing the wave path difference and antenna element radiation pattern; τ i is the physical path delay difference between the antenna array element and the external correction antenna probe, τ i =(L max -L i ) / c,L max is the maximum wave range, L i is the wave path corresponding to each antenna array element, c is the speed of light; f s is the data sampling rate; A i and are the normalized amplitude and phase of the directional pattern of the antenna array element toward the outward correction antenna probe direction; f RF is the difference between the center frequency of the correction excitation signal and the center frequency of the external correction data; i is the antenna array element number; n is an integer between [0, N], and N is the number of data sampling points; e is the natural base; j is

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