A dual-frequency millimeter wave guidance array signal isolation method

Abstract

The present invention discloses a method for isolating signals from a dual-frequency millimeter-wave guidance array. The method includes: setting a first frequency for the main array antenna and a second frequency for the illumination horn antenna, such that the difference between the first frequency and the second frequency is greater than a target frequency difference, wherein the first frequency is the frequency at which the main array antenna receives and transmits signals, and the second frequency is the frequency at which the illumination horn antenna transmits signals; determining a safe distance between the main array antenna and the illumination horn antenna based on the first frequency; setting the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illumination horn antenna; and determining the isolation between the main array antenna end and the illumination horn antenna end based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safe distance. The present invention solves the technical problem of high interference and poor signal quality when a dual-frequency millimeter-wave antenna is in operation.

Description

Technical Field

[0001] The present invention relates to the technical field of phased array radar front ends, and in particular to a dual-frequency millimeter-wave guidance array signal isolation method. Background Art

[0002] In recent years, domestic related research, such as the patent number "Electromagnetic Compatibility Method and Device for Dual-Band Common-Aperture Radar", has adopted a nested and asynchronous working mode between antennas to reduce the size of radar equipment, but the isolation between antennas is low and the system's comprehensive design capabilities have not been fully utilized.

[0003] Domestic research, such as Wang Yunchao's "Design of a Dual-Frequency, Dual-Polarized Missile-Borne Active Phased Array Antenna" from the University of Electronic Science and Technology of China, utilizes a low-stacked antenna design operating in the Ku and Ka bands. The Ku antenna is a rectangular grid array, while the Ka-band uses a sparse array around the Ku elements. This reduces the array aperture but increases system complexity and compromises antenna performance. Furthermore, this design is based on the wide frequency spacing between the dual-bands. In practice, the millimeter-wave atmospheric frequency window is extremely limited. Using transmission signals from other lower-frequency bands would make it difficult to effectively detect small, light, and stealthy targets. Summary of the Invention

[0004] An embodiment of the present invention provides a dual-frequency millimeter wave guidance array signal isolation method to at least solve the technical problem of large interference and poor signal when the dual-frequency millimeter wave antenna is working.

[0005] According to one aspect of an embodiment of the present invention, a dual-frequency millimeter-wave guided array signal isolation method is provided. The method may include: setting a first frequency of the main array antenna and a second frequency of the illumination horn antenna so that the difference between the first frequency and the second frequency is greater than the target frequency difference, wherein the first frequency is the frequency of the main array antenna receiving and transmitting signals, and the second frequency is the frequency of the illumination horn antenna transmitting signals; determining a safe distance between the main array antenna and the illumination horn antenna based on the first frequency; setting the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illumination horn antenna; determining the main array antenna end isolation and the illumination horn antenna end isolation based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna and the safe distance; when an interference signal is generated in the receiving link of the main array antenna, the receiving link is divided into a front-end receiving part, a front-end receiving part, and a front-end receiving part. The secondary frequency conversion part and the secondary frequency conversion part are used to obtain the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part; based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part, the receiving link isolation is determined; the intermediate frequency when the illuminating horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal are obtained; based on the intermediate frequency when the illuminating horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal, the intermediate frequency baseband cancellation isolation is determined; based on the main array antenna end isolation, the illuminating horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation, the total isolation is determined; the receiving sensitivity of the main array antenna receiving array is obtained, and the difference between the second frequency and the total isolation is made less than or equal to the receiving sensitivity, so that the dual-frequency millimeter wave guidance array signal isolation is optimized.

[0006] Optionally, determining the safe distance between the main array antenna and the illumination horn antenna based on the first frequency includes: determining a wavelength corresponding to the first frequency based on the first frequency; and determining a distance between the main array antenna and the illumination horn antenna that is greater than 10 times the wavelength corresponding to the first frequency as the safe distance.

[0007] Optionally, determining the main array antenna end isolation and the illumination horn antenna end isolation based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance includes: inputting the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance into an electromagnetic simulation model to obtain the main array antenna end isolation and the illumination horn antenna end isolation.

[0008] Optionally, before obtaining the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part, the method also includes: setting a radio frequency filter in the front-end receiving part; setting a first intermediate frequency filter in the primary frequency conversion part; and setting a second intermediate frequency filter in the secondary frequency conversion part.

[0009] Optionally, determining the reception link isolation degree based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part includes: determining the sum of the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part as the reception link isolation degree.

[0010] Optionally, determining the intermediate frequency baseband cancellation isolation based on the intermediate frequency when the illumination horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal includes: determining the difference between the intermediate frequency when the main array antenna receives the signal and the intermediate frequency when the illumination horn antenna transmits the signal as the intermediate frequency baseband cancellation isolation.

[0011] Optionally, determining the total isolation based on the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation includes: taking the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation to determine the total isolation and determining the sum of the four as the total isolation.

[0012] Beneficial effects of the present invention:

[0013] The present invention proposes a dual-frequency millimeter wave guidance array signal isolation method, which sets the first frequency of the main array antenna and the second frequency of the illumination horn antenna so that the difference between the first frequency and the second frequency is greater than the target frequency difference, and obtains a safe distance between the main array antenna and the illumination horn antenna according to the first frequency; sets the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illumination horn antenna; obtains the main array antenna end isolation and the illumination horn antenna end isolation according to the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna and the safe distance; if the receiving link of the main array antenna generates an interference signal, the receiving link is disconnected. It is divided into a front-end receiving part, a primary frequency conversion part and a secondary frequency conversion part, and a corresponding filter is set in each part to obtain the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part; according to the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part, the receiving link isolation is obtained; a reference intermediate frequency of the illumination signal is extracted and input into the receiver of the active array as the intermediate frequency reference, and in the receiving link to the intermediate frequency part, the intermediate frequency of the illumination signal and the intermediate frequency of the active receiving array can be used to cancel each other to obtain the intermediate frequency baseband cancellation isolation, and finally when the difference between the second frequency and the total isolation is less than or equal to the receiving sensitivity, the signal isolation of the dual-frequency millimeter wave guidance array is optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 This is a flow chart of a dual-frequency millimeter-wave guidance array signal isolation method according to an embodiment of the present invention;

[0016] Figure 2 2 is a block diagram of the radio frequency receiving link isolation principle according to an embodiment of the present invention;

[0017] Figure 3 is a block diagram of a digital baseband cancellation system according to an embodiment of the present invention;

[0018] Figure 4 2 is a schematic diagram of antenna isolation simulation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0021] Example 1

[0022] According to an embodiment of the present invention, a dual-frequency millimeter-wave guidance array signal isolation method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system containing at least one set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0023] Figure 1 FIG. 1 is a flow chart of a dual-frequency millimeter wave guidance array signal isolation method according to an embodiment of the present invention. Figure 1 As shown, the method may include the following steps:

[0024] Step S101, setting a first frequency of the main array antenna and a second frequency of the illumination horn antenna so that the difference between the first frequency and the second frequency is greater than a target frequency difference, wherein the first frequency is the frequency at which the main array antenna receives and transmits signals, and the second frequency is the frequency at which the illumination horn antenna transmits signals.

[0025] In the technical solution provided in step S101 of the present invention, the operating frequencies are first divided according to the system attack scenario, target, etc. The active array signal and the semi-active illumination signal are set at the two ends of the available frequency band as much as possible. The larger the frequency interval, the better the signal filtering effect. In terms of frequency selection, the first frequency F1 of the main array antenna and the second frequency F2 of the illumination horn antenna are set so that the difference between the first frequency and the second frequency is greater than the target frequency difference FΔ, wherein the first frequency is the frequency of the main array antenna receiving and transmitting signals, and the second frequency is the frequency of the illumination horn antenna transmitting signals.

[0026] Step S102: determining a safe distance between the main array antenna and the illumination horn antenna based on the first frequency.

[0027] In the technical solution provided in the above step S102 of the present invention, a safe distance between the main array antenna and the illumination horn antenna is obtained according to the first frequency.

[0028] Step S103 , setting the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illumination horn antenna.

[0029] In the technical solution provided in step S103 of the present invention, the size of the main array antenna is set to 150 mm x 100 mm, the size of the illumination horn antenna is set to 60 mm x 45 mm, and the polarization mode of the main array antenna and the polarization mode of the illumination horn antenna are set to millimeter waves. The main array antenna is a low-profile printed antenna, and the illumination horn antenna is a lightweight antenna with equal directivity and narrow beam. The polarization mode of the main array antenna and the polarization mode of the illumination horn antenna are vertical polarization, horizontal polarization, left-hand polarization, right-hand polarization, and other polarization modes with high isolation from each other.

[0030] Step S104 : determining the main array antenna end isolation and the illumination horn antenna end isolation based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance.

[0031] In the technical solution provided in step S104 of the present invention, the main array antenna end isolation and the illumination horn antenna end isolation are obtained based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance.

[0032] Step S105: When an interference signal is generated in the receiving link of the main array antenna, the receiving link is divided into a front-end receiving part, a primary frequency conversion part, and a secondary frequency conversion part, and the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part are obtained.

[0033] In the technical solution provided in the above step S105 of the present invention, Figure 2 FIG. 1 is a block diagram of the radio frequency receiving link isolation principle according to an embodiment of the present invention. Figure 2 As shown in the figure, when the receiving link of the main array antenna generates an interference signal, the receiving link is divided into a front-end receiving part, a primary frequency conversion part, and a secondary frequency conversion part, and the suppression degree Y1 of the front-end receiving part, the suppression degree Y2 of the primary frequency conversion part, and the suppression degree Y3 of the secondary frequency conversion part are obtained.

[0034] Step S106 : determining the reception link isolation based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part.

[0035] In the technical solution provided in the above step S106 of the present invention, the reception link isolation is obtained according to the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part.

[0036] Step S107, obtaining the intermediate frequency when the illumination horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal.

[0037] In the technical solution provided in step S107 of the present invention, Figure 3 FIG. 1 is a block diagram of a digital baseband cancellation system according to an embodiment of the present invention. Figure 3 As shown, the array master control is used to generate the illumination waveform baseband. The illumination waveform baseband is converted through DA to obtain the intermediate frequency FIz when the illumination horn antenna transmits the signal. The array master control is used to generate the active array baseband. The active array baseband is converted through AD to obtain the intermediate frequency FI2 when the main array antenna receives the signal.

[0038] Step S108 , determining the intermediate frequency baseband cancellation isolation based on the intermediate frequency when the illumination horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal.

[0039] In the technical solution provided in step S108 of the present invention, the difference between the amplitude of the intermediate frequency FI2 when the main array antenna receives the signal and the amplitude of the intermediate frequency FIz when the illumination horn antenna transmits the signal is determined as the intermediate frequency baseband cancellation isolation.

[0040] Step S109 : determining the total isolation based on the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation, and the intermediate frequency baseband cancellation isolation.

[0041] In the technical solution provided in step S109 of the present invention, the total isolation is obtained based on the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation.

[0042] Step S110: obtaining the receiving sensitivity of the main array antenna receiving array, making the difference between the second frequency and the total isolation less than or equal to the receiving sensitivity, so as to achieve optimal signal isolation of the dual-frequency millimeter wave guidance array.

[0043] In the technical solution provided in the above step S110 of the present invention, the receiving sensitivity of the receiving array of the main array antenna is obtained, and the difference between the second frequency Pzs (dB) and the total isolation ISOL_sys (dB) is made less than or equal to the receiving sensitivity Rse (dB), so that the signal isolation of the dual-frequency millimeter wave guidance array is optimized. When the dual-frequency millimeter wave guidance array signal isolation cannot be optimized, the process returns to step S101.

[0044] The above method of this embodiment is further introduced below.

[0045] As an optional embodiment, step S102, determining the safe distance between the main array antenna and the illumination horn antenna based on the first frequency, includes: determining the wavelength corresponding to the first frequency based on the first frequency; and determining the distance between the main array antenna and the illumination horn antenna greater than 10 times the wavelength corresponding to the first frequency as the safe distance.

[0046] In this embodiment, a wavelength corresponding to the first frequency is obtained according to the first frequency; and a distance between the main array antenna and the illumination horn antenna greater than 10 times the wavelength corresponding to the first frequency is determined as a safe distance.

[0047] As an optional embodiment, step S104, determining the main array antenna end isolation and the illumination horn antenna end isolation based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance, includes: inputting the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance into an electromagnetic simulation model to obtain the main array antenna end isolation and the illumination horn antenna end isolation.

[0048] In this embodiment, Figure 4This is a schematic diagram of antenna isolation simulation according to an embodiment of the present invention. Using 3D electromagnetic modeling software HFSS, the dimensions of the main array antenna, the dimensions of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and a safety distance are input into the 3D electromagnetic modeling software to obtain an electromagnetic simulation model. The input port of the illumination horn antenna is set as an electromagnetic transmitting port, and the main array antenna port is set as an electromagnetic receiving port. The operating frequency and finite element meshing conditions of the 3D electromagnetic modeling software are set, and the finite element algorithm of the 3D electromagnetic modeling software is run. Through repeated iterative calculations by the computer, the main array antenna end isolation is obtained as ISOL_ant1, and the main array antenna end isolation is obtained as ISOL_ant2.

[0049] As an optional embodiment, in step S105, before obtaining the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part, the method also includes: setting a radio frequency filter in the front-end receiving part; setting a first intermediate frequency filter in the primary frequency conversion part; and setting a second intermediate frequency filter in the secondary frequency conversion part.

[0050] In this embodiment, Figure 2 As shown, a radio frequency filter is set in the front-end receiving part; an intermediate frequency 1 filter is set in the primary frequency conversion part; and an intermediate frequency 2 filter is set in the secondary frequency conversion part. The working radio frequency frequency of the front-end receiving part is set to F1, the working frequency of the primary frequency conversion part is an intermediate frequency FI1, and the working frequency of the secondary frequency conversion part is a second intermediate frequency FI2, and F1>FI1>FI2.

[0051] As an optional implementation method, step S106, the receiving link isolation is determined based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part, including: taking the sum of the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part as the receiving link isolation.

[0052] In this embodiment, it is assumed that the suppression degree of the RF filter of the front-end receiving part on the interference signal is Y1, the suppression degree of the IF 1 filter of the primary frequency conversion part on the interference signal is Y2, and the suppression degree of the IF 2 filter of the secondary frequency conversion part on the interference signal is Y3. The isolation of the RF link from the interference signal is Y1+Y2+Y3=ISOL_rf, where ISOL_rf is the isolation degree of the receiving link.

[0053] As an optional embodiment, step S108, determining the intermediate frequency baseband cancellation isolation based on the intermediate frequency when the illumination horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal, includes: determining the difference between the intermediate frequency when the main array antenna receives the signal and the intermediate frequency when the illumination horn antenna transmits the signal as the intermediate frequency baseband cancellation isolation.

[0054] In this embodiment, Figure 3 As shown in FIG, the difference between the intermediate frequency FI2 when the main array antenna receives the signal and the intermediate frequency FIz when the illumination horn antenna transmits the signal is determined as the intermediate frequency baseband cancellation isolation ISOL_ds.

[0055] As an optional embodiment, step S109, determining the total isolation based on the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation, includes: determining the total isolation by summing the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation.

[0056] In this embodiment, the total isolation is determined by summing the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation, and the intermediate frequency baseband cancellation isolation. The total isolation is expressed as follows:

[0057] ISOL_sys= ISOL_ant1+ISOL_ant2+ ISOL_rf + ISOL_if

[0058] Among them, ISOL_sys is the total isolation.

[0059] In an embodiment of the present invention, a first frequency of the main array antenna and a second frequency of the illumination horn antenna are set so that the difference between the first frequency and the second frequency is greater than a target frequency difference, wherein the first frequency is the frequency at which the main array antenna receives and transmits signals, and the second frequency is the frequency at which the illumination horn antenna transmits signals; based on the first frequency, a safe distance between the main array antenna and the illumination horn antenna is determined; the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illumination horn antenna are set; based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safe distance, the isolation degree at the main array antenna end and the isolation degree at the illumination horn antenna end are determined; when an interference signal is generated in the receiving link of the main array antenna, the receiving link is divided into a front-end receiving part, a primary frequency conversion part, and a secondary frequency conversion part, and the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part are obtained. ; Based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part and the suppression degree of the secondary frequency conversion part, the receiving link isolation is determined; the intermediate frequency when the illuminating horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal are obtained; based on the intermediate frequency when the illuminating horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal, the intermediate frequency baseband cancellation isolation is determined; based on the main array antenna end isolation, the illuminating horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation, the total isolation is determined; the receiving sensitivity of the main array antenna receiving array is obtained, and the difference between the second frequency and the total isolation is made less than or equal to the receiving sensitivity, so that the signal isolation of the dual-frequency millimeter wave guidance array is optimized, and the technical problem of large interference and poor signal when the dual-frequency millimeter wave antenna is working is solved, and the technical effect of small interference and strong signal when the dual-frequency millimeter wave antenna is working is achieved through the isolation design of the antenna end, the step-by-step filtering isolation of the RF link, and the intermediate frequency baseband isolation cancellation at three levels of isolation design is achieved.

[0060] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0061] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0063] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0064] In addition, the functional units in various embodiments of the present invention may be integrated into a first processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0065] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dual-frequency millimeter wave guidance array signal isolation method, characterized in that: include: Setting a first frequency of the main array antenna and a second frequency of the illumination horn antenna so that the difference between the first frequency and the second frequency is greater than the target frequency difference, wherein the first frequency is the frequency at which the main array antenna receives and transmits signals, and the second frequency is the frequency at which the illumination horn antenna transmits signals; Determining a safe distance between the main array antenna and the illumination horn antenna based on the first frequency; Set the size of the main array antenna, the size of the illuminating horn antenna, the polarization mode of the main array antenna, and the polarization mode of the illuminating horn antenna; Based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna and the safety distance, the isolation degree at the main array antenna end and the isolation degree at the illumination horn antenna end are determined; When an interference signal is generated in the receiving link of the main array antenna, the receiving link is divided into a front-end receiving part, a primary frequency conversion part, and a secondary frequency conversion part, and the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part are obtained; Determine the reception link isolation based on the suppression of the front-end receiving part, the suppression of the primary frequency conversion part, and the suppression of the secondary frequency conversion part; Obtain the intermediate frequency when the illumination horn antenna transmits the signal and the intermediate frequency when the main array antenna receives the signal; Determine the IF baseband cancellation isolation based on the IF when the illumination horn antenna transmits the signal and the IF when the main array antenna receives the signal; Determine the total isolation based on the isolation at the main array antenna end, the isolation at the illumination horn antenna end, the reception link isolation, and the intermediate frequency baseband cancellation isolation. The receiving sensitivity of the main array antenna receiving array is obtained, and the difference between the second frequency and the total isolation is made less than or equal to the receiving sensitivity, so that the signal isolation of the dual-frequency millimeter wave guidance array is optimized.

2. The method according to claim 1, characterized in that The step of determining a safe distance between the main array antenna and the illumination horn antenna based on the first frequency includes: Based on the first frequency, determining a wavelength corresponding to the first frequency; The distance between the main array antenna and the illumination horn antenna is greater than 10 times the wavelength corresponding to the first frequency, which is determined as a safe distance.

3. The method according to claim 2, characterized in that The determining of the main array antenna end isolation and the illumination horn antenna end isolation based on the size of the main array antenna, the size of the illumination horn antenna, the polarization mode of the main array antenna, the polarization mode of the illumination horn antenna, and the safety distance includes: The size of the main array antenna, the size of the illuminating horn antenna, the polarization mode of the main array antenna, the polarization mode of the illuminating horn antenna and the safety distance are input into the electromagnetic simulation model to obtain the isolation at the main array antenna end and the isolation at the illuminating horn antenna end.

4. The method according to claim 1, wherein Before obtaining the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part, the method further includes: Setting a radio frequency filter in the front-end receiving part; A first intermediate frequency filter is provided in the primary frequency conversion part; A second intermediate frequency filter is provided in the secondary frequency conversion part.

5. The method according to claim 1, wherein The determining of the reception link isolation based on the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part includes: The sum of the suppression degree of the front-end receiving part, the suppression degree of the primary frequency conversion part, and the suppression degree of the secondary frequency conversion part is determined as the receiving link isolation.

6. The method according to claim 3, characterized in that The determining of the intermediate frequency baseband cancellation isolation based on the intermediate frequency when the illumination horn antenna transmits a signal and the intermediate frequency when the main array antenna receives a signal includes: The difference between the intermediate frequency when the main array antenna receives the signal and the intermediate frequency when the illumination horn antenna transmits the signal is determined as the intermediate frequency baseband cancellation isolation.

7. The method according to claim 6, characterized in that The total isolation is determined based on the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation, including: The total isolation is determined by summing the main array antenna end isolation, the illumination horn antenna end isolation, the receiving link isolation and the intermediate frequency baseband cancellation isolation.

8. A computer system, characterized in that include: One or more processors, and a computer-readable storage medium for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the method of claim 1.

9. A computer-readable storage medium, characterized in that Computer-executable instructions are stored, and when the instructions are executed, they are used to implement the method of claim 1.

10. A computer program product, characterized in that The invention comprises computer executable instructions, which are used to implement the method of claim 1 when the instructions are executed.

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