CN115173083A - Multi-beam anti-interference phased array antenna - Google Patents
Multi-beam anti-interference phased array antenna Download PDFInfo
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- CN115173083A CN115173083A CN202210924994.0A CN202210924994A CN115173083A CN 115173083 A CN115173083 A CN 115173083A CN 202210924994 A CN202210924994 A CN 202210924994A CN 115173083 A CN115173083 A CN 115173083A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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Abstract
The invention discloses a multi-beam anti-interference phased array antenna, which belongs to the technical field of communication antennas and comprises an antenna array surface, a radio frequency assembly unit, a thermal control unit and an anti-interference digital processing unit which are sequentially connected from top to bottom, wherein the anti-interference digital processing unit and a control unit are arranged on the same layer, and a frequency conversion unit and a power supply module are respectively arranged on two sides of the radio frequency assembly unit; the radio frequency component unit is connected with the anti-interference digital processing unit; the control unit is in communication connection with the radio frequency assembly unit; the control unit is communicated with the anti-interference digital processing unit, switching between an anti-interference mode and a non-anti-interference mode is achieved, and the working state of the anti-interference digital processing unit is monitored. The linear polarization signal is synthesized by the two circularly polarized signals, so that stable signal gain in scanning within the range of 360 degrees off-axis angle +/-60 degrees of azimuth can be guaranteed, gain loss can be greatly reduced, and high-precision and high-stability polarization tracking is realized.
Description
Technical Field
The invention relates to the technical field of communication antennas, in particular to a multi-beam anti-interference phased array antenna.
Background
The satellite communication has the advantages of long transmission distance, large coverage range and no influence by landform. The satellite communication system can perform voice, data and image communication in the satellite beam coverage range no matter in mountains, hills, rivers, deserts and grasslands, has good communication quality, stable channels, low bit error rate and flexible networking mode, and has irrelevant communication cost and communication distance, so that the satellite communication becomes a main means of wireless communication and plays an increasingly important role in modern information transmission.
The conventional satellite communication earth station is generally fixed or movable, unlike the general wireless communication system which has the capability of realizing real-time communication in motion, for example, on moving trains and automobiles, due to the fluctuation, bumpiness and turning of roads and the continuous change of the position and direction of the vehicles, the antennas erected on the carriers cannot keep real-time alignment with the satellites and cannot receive satellite signals. In order to solve the problem of stable satellite communication in motion, the technology of communication in motion is developed and can be applied to the scene of communication in quiet.
The traditional communication-in-motion antenna has low tracking speed and large size and weight, and simultaneously, one set of antenna cannot track a plurality of targets simultaneously. The introduction of the multi-beam phased array antenna technology enables the inherent defects of the traditional communication-in-motion antenna system to be effectively solved.
The satellite signal tracking mainly comprises polarization tracking and azimuth tracking, wherein a polarization matching mode commonly used for the polarization tracking is to synthesize a linear polarization signal with controllable direction by using two polarization signals with the same phase line which are perpendicular to each other, and adjust the direction of the synthesized linear polarization wave by controlling the amplitude of the two linear polarization signals. However, synthesizing linear polarization in this way requires using an attenuator to adjust the amplitude of the linear polarization signal, which results in large power loss, and in pursuit of maximum gain, results in low power stability in the scanning range, and also results in low accuracy of synthesized linear polarization due to low accuracy of attenuator adjustment.
The traditional communication-in-moving phased array antenna can only track one target and does not have an anti-interference function, and for simultaneous multi-target tracking of one frequency band or simultaneous multi-target tracking of multiple frequency bands and each frequency band, a plurality of communication-in-moving phased array systems need to work simultaneously to meet the tracking requirement, and an anti-interference system needs to be added independently to prevent interference signals from being accessed, so that the cost, the weight and the size of the whole large system are increased. The specific problem to be solved by the invention is how to track n targets simultaneously in one frequency band or simultaneously track n targets simultaneously in multiple frequency bands and each frequency band is resistant to m interference, wherein n is not less than 2,m is not less than 1.
Disclosure of Invention
The invention aims at the problems and provides a multi-beam anti-interference phased array antenna which comprises an antenna array surface, a radio frequency component unit, a thermal control unit, an anti-interference digital processing unit and a control unit which are sequentially connected from top to bottom,
the anti-interference digital processing unit and the control unit are arranged on the same layer, and a frequency conversion unit and a power module are respectively arranged on two sides of the radio frequency assembly unit;
the radio frequency component unit is connected with the anti-interference digital processing unit;
the control unit is in communication connection with the radio frequency component units, controls the phase shifters of the radio frequency component units in each frequency band, realizes scanning of 360-degree off-axis angles +/-60 degrees in direction, performs multi-beam scanning simultaneously, and monitors the working state of the radio frequency component units;
the control unit is communicated with the anti-interference digital processing unit, switching between an anti-interference mode and a non-anti-interference mode is achieved, and the working state of the anti-interference digital processing unit is monitored.
Furthermore, each frequency band array element in the antenna array surface comprises left-hand circular polarization feed and right-hand circular polarization feed;
the left-hand circular polarization and the right-hand circular polarization are vertically connected with the radio frequency component unit;
the left-hand circular polarization and the right-hand circular polarization can simultaneously realize n wave beams and resist m interferences, wherein n is larger than or equal to 2, namely at least 2 wave beams are included, and m is larger than or equal to 1;
the multi-beam anti-interference phased array antenna is not limited to the application of resisting interference of multiple beams in one frequency band, can be expanded to the application of resisting interference of multiple beams in multiple frequency bands, is suitable for the application of resisting m interference of n beams in the left and right directions of a frequency bands, is also suitable for the application of resisting m interference of n beams in the a frequency bands, and can be applied to different scenes of 'static center communication' and 'communication in motion', wherein a is more than or equal to 1.
Further, each of the antenna fronts includes equal m +1 sub-arrays.
Furthermore, the radio frequency component unit comprises a receiving component, a frequency conversion component, a local oscillation module and a phase shifter;
the receiving assembly comprises a left-handed receiving module and a right-handed receiving module, the left-handed receiving module and the right-handed receiving module are respectively n (m + 1), and each of the left-handed receiving module and the right-handed receiving module is composed of n LNA (low noise amplifier) channel units.
Furthermore, each LNA channel unit performs low noise amplification filtering and attenuation control functions on the beam radio frequency signals received by the antenna, then divides the signals into n paths of signals, performs signal phase control on each path of signals after power division, combines the signals of the corresponding beams, and sends the combined signals to the frequency conversion component.
Furthermore, the frequency conversion assembly comprises n × m +1 left-handed frequency conversion channels and n × m +1 right-handed frequency conversion channels, wherein the left-handed frequency conversion channels and the right-handed frequency conversion channels are used for down-converting the radio frequency signals to intermediate frequency signals, amplifying and filtering the intermediate frequency signals, and outputting the intermediate frequency signals.
Furthermore, the local oscillation module mainly provides local oscillation signals for 2n × m +1 frequency conversion assemblies.
Furthermore, the anti-interference digital processing unit is vertically connected with the radio frequency component unit, and is used for receiving n wave beam signals of m +1 sub-arrays, resisting m interference functions of each wave beam in an anti-interference mode, combining the left-handed signals of the m +1 sub-arrays into one path for output, and combining the right-handed signals of the m +1 sub-arrays into one path for output;
and in a non-anti-interference mode, synthesizing each wave beam of m +1 sub-array left-hand signals into one path of output, and synthesizing each wave beam of m +1 sub-array right-hand signals into one path of output.
Furthermore, the control unit is in communication connection with the radio frequency component unit through a serial port, and the control unit controls the phase shifter to shift the phase, so that the pointing and tracking of n wave beams of the phased array antenna are realized.
Still further, the frequency conversion unit includes: the system comprises a channelization unit, a frequency conversion module and a local oscillation control unit;
the channelizing unit divides n left-handed wave beam signals and n right-handed wave beam signals input in the radio frequency component unit into K channels respectively, and outputs 2K channels to the frequency conversion module, wherein K is more than or equal to 2.
The invention has the beneficial effects that:
the linear polarization signal is synthesized by the two circularly polarized signals, so that stable signal gain in scanning within the range of 360 degrees off-axis angle +/-60 degrees of azimuth can be guaranteed, gain loss can be greatly reduced, and high-precision and high-stability polarization tracking is realized.
The method and the device can realize n target tracking at the same time of one frequency band or n target tracking at the same time of a plurality of frequency bands and each frequency band, and each wave beam resists m interference, seamless switching can be realized between left-handed polarization and right-handed polarization, the tracking target can be switched seamlessly, n is not less than 2,m is not less than 1, the method and the device are suitable for phased array products in the communication and navigation fields, and have strong expansibility.
The application is not limited to the application of multiple wave beams in one frequency band for resisting interference, and can be expanded to the application of multiple wave beams in multiple frequency bands for resisting interference, namely the application is suitable for resisting m interference by using n wave beams in left and right rotation of a frequency bands, and is also suitable for m interference applications by using n wave beams in single polarization of a frequency band, the application scene of the application can be used for realizing rapid and simultaneous tracking of multiple targets under different scenes such as 'static center communication' and 'communication in motion', and the like, wherein a is not less than 1,n and is not less than 2,m and is not less than 1.
According to the multi-beam anti-interference phased array antenna, the number of array surfaces or array elements does not need to be increased, the digital-analog mixing method is adopted to realize independent scanning and tracking of the target by a plurality of beams and simultaneously resist multi-interference, the problems of large size, low integration level and single function of the multi-beam anti-interference phased array antenna are solved, and the multi-beam anti-interference phased array antenna is suitable for multi-beam anti-interference/non-anti-interference application of one frequency band or a plurality of frequency bands.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of a basic framework of a multi-beam anti-interference phased array antenna according to an embodiment of the present invention;
fig. 2 is a schematic side structure diagram of a multi-beam anti-interference phased array antenna according to an embodiment of the present invention.
Reference numerals:
the antenna array surface is 1, the radio frequency component unit is 2, the thermal control unit is 3, the anti-interference digital processing unit is 4, the control unit is 5, the frequency conversion module is 6, and the power module is 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 2, as shown in fig. 1 to 2, a multi-beam anti-interference phased array antenna includes an antenna array 1, a radio frequency component unit 2, a thermal control unit 3, an anti-interference digital processing unit 4 and a control unit 5 connected in sequence from top to bottom,
the anti-interference digital processing unit 4 and the control unit 5 are arranged on the same layer, and a frequency conversion unit 6 and a power module 7 are respectively arranged on two sides of the radio frequency component unit;
the radio frequency component unit 2 is connected with the anti-interference digital processing unit 4;
the control unit 5 is in communication connection with the radio frequency component unit 2, controls the phase shifter of the radio frequency component unit of each frequency band to realize scanning of 360-degree off-axis angles +/-60 degrees in direction, simultaneously performs multi-beam scanning, and monitors the working state of the radio frequency component unit 2;
and the control unit 5 is communicated with the anti-interference digital processing unit 4, so that the switching between the anti-interference mode and the non-anti-interference mode is realized, and the working state of the anti-interference digital processing unit is monitored.
It should be noted that, the antenna array surface performs signal radiation; the radio frequency component unit is vertically interconnected with the antenna array surface, and mainly realizes that the input signal of a radio frequency signal port is subjected to low-noise amplification, phase shift and down-conversion and then is sent to the anti-interference digital processing unit.
The thermal control unit adopts a vapor chamber for heat dissipation and serves as a mounting main body of the whole system. The anti-interference digital processing unit and the radio frequency assembly unit are vertically interconnected and installed on the upper side and the lower side of the soaking plate of the thermal control unit, n wave beam signals of m +1 sub-arrays are mainly received from the radio frequency assembly unit, each wave beam of the left-hand signals of the m +1 sub-arrays is synthesized into one path and output to the frequency conversion module through anti-interference, and each wave beam of the right-hand signals of the m +1 sub-arrays is synthesized into one path and output to the frequency conversion unit.
The frequency conversion unit is connected with the anti-interference digital processing unit through a cable, and left-handed and right-handed signals generated by the processing of the main anti-interference digital processing unit are channelized into left-handed and right-handed k channels, and are sent to the subsequent signal processing unit after being down-converted to 70MHz +/-20 MHz.
The control unit is communicated with the radio frequency component unit through a serial port, and mainly realizes phase shift control and beam forming through controlling a phase shifter of the radio frequency component unit, and realizes beam pointing and tracking and simultaneously monitors the working state of the radio frequency component unit.
The control unit is communicated with the anti-interference digital processing unit through a serial port, and mainly realizes the switching between an anti-interference function and a non-anti-interference mode and monitors the working state of the anti-interference digital processing unit.
As can be seen from FIG. 2, the module of the present invention comprises 7 modules, wherein three modules adopt a vertical interconnection structure, one module is used as a main body for installing and radiating the whole system, the installation of the whole system is tight, and the space utilization rate is greatly improved.
It is worth mentioning that the thermal control unit adopts the soaking plate to dissipate heat and is used as the installation main body of the whole system. The thermal control unit adopts a soaking plate to provide small space and good heat dissipation performance for high-heat-consumption components and digital control boards, ensures uniform temperature and temperature change of each module, and meets the temperature resistance requirement of devices by combining fan heat dissipation.
The heat control unit is used as a whole system installation main body, the radio frequency assembly unit is installed on the vapor chamber through screws, the anti-interference digital processing unit and the control unit are installed below the vapor chamber through screws, and the frequency conversion unit and the power supply module are hung on the side face of the vapor chamber through screws.
In an embodiment of the present invention, each frequency band array element in the antenna array plane 1 includes left-hand circular polarization feed and right-hand circular polarization feed;
the left-hand circular polarization and the right-hand circular polarization are vertically connected with the radio frequency component unit 2;
the left-hand circular polarization and the right-hand circular polarization can simultaneously generate n wave beams and resist m interference, wherein n is larger than or equal to 2, namely at least 2 wave beams are included, and m is larger than or equal to 1;
the multi-beam anti-interference phased array antenna is not limited to the application of resisting interference of multiple beams in one frequency band, can be expanded to the application of resisting interference of multiple beams in multiple frequency bands, is suitable for the application of resisting m interference of n beams in the left and right directions of a frequency bands, is also suitable for the application of resisting m interference of n beams in the a frequency bands, and can be applied to different scenes of 'static center communication' and 'communication in motion', wherein a is more than or equal to 1.
It should be noted that, the multi-beam anti-interference phased array antenna can realize n target tracking at the same time of one frequency band or n target tracking at the same time of multiple frequency bands and each frequency band and resist m interference, and from the aspects of function realization, electrical performance, processing difficulty, system thermal control, control angle and cost analysis, the antenna architecture is the optimal architecture of the multi-beam anti-interference phased array antenna, the architecture greatly improves the space utilization rate, and n is not less than 2,m and is not less than 1.
The antenna array surface comprises a plurality of antenna array elements, wherein the antenna array elements are designed in a double-circular polarization mode, and each antenna array element comprises two feeds, a left-hand circular polarization mode and a right-hand circular polarization mode.
The antenna array surface is realized by adopting a multi-layer coupling feed microstrip antenna mode, a fixed array element interval is adopted according to a scanning angle to be covered, the unit interval is determined by calculation according to a formula, and signals are radiated to the space through each array element to synthesize beams in the required direction.
In an embodiment of the present invention, each of the antenna arrays includes equal m +1 sub-arrays.
In an embodiment of the present invention, the radio frequency component unit 2 includes a receiving component, a frequency conversion component, a local oscillator module, and a phase shifter;
the receiving assembly comprises a left-handed receiving module and a right-handed receiving module, the left-handed receiving module and the right-handed receiving module are respectively n (m + 1), and each of the left-handed receiving module and the right-handed receiving module is composed of n LNA (low noise amplifier) channel units.
In an embodiment of the present invention, each LNA channel unit performs low noise amplification filtering and attenuation control functions on a beam radio frequency signal received by an antenna, and then divides the signal into n paths of signals, performs signal phase control on each path of signal after the power division, combines the signals of the corresponding beams, and sends the combined signals to a frequency conversion module.
In an embodiment of the present invention, the frequency conversion component includes n × m +1 left-handed frequency conversion channels and n × m +1 right-handed frequency conversion channels, and the left-handed frequency conversion channels and the right-handed frequency conversion channels are configured to down-convert a radio frequency signal to an intermediate frequency signal, amplify and filter the intermediate frequency signal, and output the amplified intermediate frequency signal.
It should be noted that the frequency conversion component mainly down-converts the radio frequency signal to the intermediate frequency signal ((900 MHz-3500M) ± 500 MHz), and amplifies and filters the intermediate frequency signal and outputs the intermediate frequency signal.
In an embodiment of the present invention, the local oscillation module mainly provides local oscillation signals for 2n × m +1 frequency conversion assemblies.
In an embodiment of the present invention, the anti-interference digital processing unit 4 is vertically connected to the radio frequency component unit 2, and the anti-interference digital processing unit 4 is configured to receive n beam signals of m +1 sub-arrays, perform m-interference resistance function on each beam in an anti-interference mode, combine the left-handed signals of the m +1 sub-arrays into one path for output, and combine the right-handed signals of the m +1 sub-arrays into one path for output;
and in a non-anti-interference mode, synthesizing each wave beam of the m +1 sub-array left-hand signals into one path for output, and synthesizing each wave beam of the m +1 sub-array right-hand signals into one path for output.
It should be noted that, the anti-interference digital processing unit adopts a hardware platform with a DSP + FPGA architecture, the processing speed is high, external interfaces are rich, the anti-interference function is loaded, m +1 sub-arrays equally divided by the antenna array surface are combined, the anti-interference function of m interference can be realized for each beam, and m is more than or equal to 1.
In an embodiment of the present invention, the control unit 5 is in communication connection with the radio frequency component unit 2 through a serial port, and the control unit 5 controls the phase shifter to shift the phase, so as to realize the pointing and tracking of n beams of the phased array antenna.
It should be noted that the wave control main control board of the control unit is installed below the soaking plate and is communicated with the radio frequency assembly unit and the anti-interference digital processing unit through serial ports.
The control unit receives the combined inertial navigation information through a serial port, calculates position information in real time and calculates beam pointing information by combining ephemeris information, and then controls the numerical control phase shifter in the radio frequency assembly unit to realize beam pointing.
Specifically, the n wave beams of the antenna are controlled to point and track by controlling the phase shift of the phase shifter of the radio frequency component unit. The temperature change of the radio frequency component unit is realized by receiving the temperature information reported by the radio frequency component unit, and the switching between the anti-interference mode and the non-anti-interference mode of the anti-interference digital processing unit is controlled.
And detecting the temperature change of the interference digital processing unit by receiving the temperature information reported by the interference digital processing unit.
In an embodiment of the present invention, the frequency conversion unit 6 includes: the system comprises a channelization unit, a frequency conversion module and a local oscillation control unit;
the channelizing unit divides n left-handed beam signals and n right-handed beam signals input in the radio frequency component unit 2 into K channels respectively, and outputs 2K channels to the frequency conversion module, wherein K is greater than or equal to 2.
It should be noted that the left-hand corresponds to k channels, the right-hand corresponds to k channels, and 2k channels are output to the frequency conversion module, wherein n is greater than or equal to 2,k and greater than or equal to 2.
The frequency conversion module converts the input 2k channel signals into an intermediate frequency of 70MHz +/-20 MHz, and outputs the intermediate frequency to the baseband processing unit after filtering and amplification, wherein the left-handed k channels and the right-handed k channels are paired pairwise to share a local oscillator.
The local oscillator control unit mainly provides corresponding local oscillators for the frequency conversion module, communicates with the system master control, responds to commands to correspondingly control the modules, performs filtering and voltage stabilizing processing on an input power supply, and provides corresponding power supplies for the frequency conversion module and the channelization unit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multi-beam anti-interference phased array antenna comprises an antenna array surface (1), a radio frequency component unit (2), a thermal control unit (3), an anti-interference digital processing unit (4) and a control unit (5) which are sequentially connected from top to bottom,
the anti-interference digital processing unit (4) and the control unit (5) are arranged on the same layer, and a frequency conversion unit (6) and a power module (7) are respectively installed on two sides of the radio frequency component unit (2); the radio frequency component is characterized in that the radio frequency component unit (2) is connected with an anti-interference digital processing unit (4);
the control unit (5) is in communication connection with the radio frequency component unit (2) and controls the phase shifter of the radio frequency component unit of each frequency band, so that the scanning of 360-degree off-axis angles +/-60 degrees of the direction is realized, multi-beam scanning is carried out at the same time, and the working state of the radio frequency component unit (2) is monitored;
the control unit (5) is communicated with the anti-interference digital processing unit (4), so that switching between an anti-interference mode and a non-anti-interference mode is realized, and the working state of the anti-interference digital processing unit (4) is monitored.
2. The multi-beam antijam phased array antenna of claim 1, wherein each frequency band element in the antenna array (1) includes left and right hand circular polarization feeds;
the left-hand circular polarization and the right-hand circular polarization are vertically connected with the radio frequency component unit (2);
the left-hand circular polarization and the right-hand circular polarization can simultaneously realize n wave beams and resist m interferences, wherein n is more than or equal to 2, namely at least 2 wave beams are included, and m is more than or equal to 1;
the multi-beam anti-interference phased array antenna is not limited to the application of resisting interference of multiple beams in one frequency band, can be expanded to the application of resisting interference of multiple beams in multiple frequency bands, is suitable for the application of resisting m interference of n beams in the left and right directions of a frequency bands, is also suitable for the application of resisting m interference of n beams in the a frequency bands, and can be applied to different scenes of 'static center communication' and 'communication in motion', wherein a is more than or equal to 1.
3. The multi-beam antijam phased array antenna of claim 2, wherein each of the antenna fronts includes equal m +1 sub-arrays.
4. The multi-beam antijam phased array antenna of claim 3, characterized in that the radio frequency component unit (2) includes a receiving component, a frequency conversion component, a local oscillation module and a phase shifter;
the receiving assembly comprises a left-handed receiving module and a right-handed receiving module, the left-handed receiving module and the right-handed receiving module are respectively n (m + 1), and each of the left-handed receiving module and the right-handed receiving module is composed of n LNA (low noise amplifier) channel units.
5. The multi-beam anti-jamming phased array antenna according to claim 4, wherein each of the LNA channel units performs low noise amplification filtering and attenuation control functions on the beam radio frequency signals received by the antenna, then divides the signals into n paths of signals, performs signal phase control on each path of signals after the power division, combines the signals of the corresponding beams, and sends the combined signals to the frequency conversion component.
6. The multi-beam antijam phased array antenna of claim 3, wherein the frequency conversion assembly includes n x (m + 1) left-hand frequency conversion channels and n x (m + 1) right-hand frequency conversion channels, and the left-hand frequency conversion channels and the right-hand frequency conversion channels are configured to down-convert the radio frequency signals to intermediate frequency signals and amplify and filter the intermediate frequency signals for output.
7. The multi-beam antijam phased array antenna of claim 3, wherein the local oscillator module is configured to provide local oscillator signals to substantially 2n x (m + 1) of the frequency conversion assemblies.
8. The multi-beam antijam phased array antenna of claim 4, wherein the antijam digital processing unit (4) is vertically connected to the radio frequency component unit (2), and the antijam digital processing unit (4) is configured to receive n beam signals of m +1 subarrays, perform m-interference-resistant functions on each beam in an antijam mode, combine the left-handed signals of the m +1 subarrays into one output, and combine the right-handed signals of the m +1 subarrays into one output;
and in a non-anti-interference mode, synthesizing each wave beam of the m +1 sub-array left-rotation signals into one path of output, and synthesizing each wave beam of the m +1 sub-array right-rotation signals into one path of output.
9. The multi-beam antijam phased array antenna of claim 4, characterized in that the control unit (5) is in communication connection with the radio frequency assembly unit (2) via a serial port, and the control unit (5) controls the phase shifters to shift the phases, so as to realize n beam pointing and tracking of the phased array antenna.
10. The multi-beam antijam phased array antenna of claim 4, characterized in that the frequency conversion unit (6) comprises: the system comprises a channelization unit, a frequency conversion module and a local oscillation control unit;
the channelizing unit divides n left-handed wave beam signals and n right-handed wave beam signals input in the radio frequency component unit (2) into K channels respectively, and outputs 2K channels to the frequency conversion module, wherein K is larger than or equal to 2.
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| CN116260499A (en) * | 2023-05-10 | 2023-06-13 | 成都星航微波技术有限公司 | Satellite-borne multi-beam T/R phased array and solar power supply automatic unfolding system |
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| CN116260499A (en) * | 2023-05-10 | 2023-06-13 | 成都星航微波技术有限公司 | Satellite-borne multi-beam T/R phased array and solar power supply automatic unfolding system |
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Inventor after: Shan Nina Inventor after: He Chang Inventor after: Jin Shichao Inventor after: Gao Feng Inventor after: Wang Zihan Inventor after: Chen Lu Inventor after: Duan Zhen Inventor after: Liu Haiyong Inventor after: Liu Yazhao Inventor after: Cui Zhe Inventor before: Shan Nina |