CN113036462B - C-band broadband digital multi-beam array antenna system - Google Patents
C-band broadband digital multi-beam array antenna system Download PDFInfo
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- CN113036462B CN113036462B CN202110219132.3A CN202110219132A CN113036462B CN 113036462 B CN113036462 B CN 113036462B CN 202110219132 A CN202110219132 A CN 202110219132A CN 113036462 B CN113036462 B CN 113036462B
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Abstract
The invention provides a C-band broadband digital multi-beam array antenna system. The antenna system comprises an antenna array surface, a digital down-conversion component, a frequency synthesis component and a power supply component; the antenna array surface comprises a left antenna array, a left array frame fixedly provided with the left antenna array, a right antenna array and a right array frame fixedly provided with the right antenna array, and the left array frame and the right array frame are respectively positioned on the left side and the right side of the whole system structure; the digital down-conversion component is positioned at the lowest part of the whole system structure and is connected with the left antenna array and the right antenna array through radio frequency cables; the frequency synthesis component is positioned above the digital down-conversion component and is connected with the digital down-conversion component through a radio frequency cable; the power supply assembly supplies power for the digital down-conversion assembly and the frequency synthesis assembly. The antenna array surface of the broadband digital multi-beam array antenna system is divided into an antenna left array and an antenna right array, and the antenna left array and the antenna right array share one set of digital down-conversion assembly to further form a multi-beam directional diagram in a time-sharing mode, so that the power consumption of the system is reduced, and the hardware cost of the system is reduced.
Description
Technical Field
The invention relates to the technical field of digital array antennas, in particular to a C-band broadband digital multi-beam array antenna system.
Background
The digital multi-beam array antenna adopts a beam forming network to form a plurality of beams with different directions in space, thereby realizing space division multiplexing and increasing communication capacity. The method has the characteristics of flexible and controllable beam, low side lobe level and self-adaptive zeroing, and has wide application prospect in military and civil aspects.
Specifically, the digital multi-beam array antenna is a technology that introduces digital signal processing into the field of phased array antenna technology, and forms a reception beam in a desired direction by digital signal processing by making full use of the aperture of the array antenna. For signals of a plurality of receiving channels of the array antenna, compensating phase differences caused by propagation wave path differences caused by different spatial positions of antenna array elements for incident signals in a certain direction by using a digital processing method, realizing in-phase superposition, realizing maximum energy receiving in the direction and finishing beam forming in the direction. This focusing of the directional gain received by the array in a given direction corresponds to the formation of a "beam". The beams can be pointed in different directions by changing the weight values, and the scanning of the beams is realized. Multiple beams can be formed simultaneously through multi-channel parallel processing, and a proper window function can be selected to reduce the side lobe level of a directional diagram.
However, most of the current digital multi-beam array antennas have problems in terms of cost, volume, power consumption, etc., and if the coverage of beams in a plurality of quadrant airspaces is to be satisfied, a plurality of such digital multi-beam array antennas are generally required, which is difficult to satisfy the demands of the development of wireless communication devices toward miniaturization, low cost, and integration.
Disclosure of Invention
The invention provides a C-band broadband digital multi-beam array antenna system, which solves the problems of cost, volume, power consumption and the like in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a C-band broadband digital multi-beam array antenna system comprises an antenna array surface, a C-band broadband digital multi-beam array antenna system and a C-band broadband digital multi-beam array antenna system, wherein the C-band broadband digital multi-beam array antenna system comprises an antenna left array, a left array frame fixedly provided with the antenna left array, an antenna right array and a right array frame fixedly provided with the antenna right array, and the antenna left array frame, the antenna right array and the right array frame are respectively positioned on the left side and the right side of the whole system structure; the digital down-conversion component is positioned at the lowest part of the whole system structure and is connected with the left antenna array and the right antenna array through radio frequency cables; the frequency synthesis assembly is arranged in parallel with the digital down-conversion assembly, is positioned on the digital down-conversion assembly and is connected with the digital down-conversion assembly through a radio frequency cable; and the power supply component supplies power to the digital down-conversion component and the frequency synthesis component.
Furthermore, the left antenna array and the right antenna array are sixteen-unit one-dimensional linear arrays, a multi-beam directional diagram covering an airspace from-45 degrees to +45 degrees is formed on an azimuth plane and is used for receiving electromagnetic signals of the airspace, and the left antenna array and the right antenna array work in a time-sharing mode.
Further, the size of the array face of the antenna array face is 16 × 5; the pitching plane 5 antenna units are combined into a linear array through the power divider, the azimuth plane has 16 linear arrays to form the whole antenna array surface, and the 16 linear arrays are divided into a completely consistent and interchangeable antenna left array and an antenna right array.
Furthermore, the digital down-conversion component outputs sixteen paths of intermediate frequency signals after the received electromagnetic signals are subjected to amplitude limiting, amplification or direct connection selection, gain control, switch filtering, third-time frequency conversion, amplification, filtering and gain control.
Furthermore, the digital down-conversion component comprises a receiving channel module circuit, a local oscillator power divider and a power supply control network; the three local oscillation signals and the control signal provided by the frequency synthesis component and the power supply signal are transmitted to a receiving channel through a local oscillation power distribution and power supply control network; the receiving channel module circuit is provided with sixteen receiving channels, and each receiving channel is shared by two antennas and is switched to use through a switch.
Furthermore, the frequency synthesis component mainly comprises a clock reference unit, a local oscillator synthesis unit, a second local oscillator synthesis unit, a third local oscillator synthesis unit and a system control and power supply processing unit; wherein, a local oscillator synthesis unit, two local oscillator synthesis units and three local oscillator synthesis units provide 2 way one local oscillator signal, 2 way two local oscillator signals and 2 way three local oscillator signals for digital down conversion subassembly respectively.
Furthermore, a local oscillation synthesis unit comprises a first comb spectrum generator, a first switch filter component, a first amplifier, a mixer, a second switch filter component, a second amplifier, a directional coupling module and a one-to-two power divider which are arranged in sequence; the other input end of the mixer is connected with the frequency hopping signal after filtering.
Further, the second local oscillator synthesis unit comprises a second comb spectrum generator, a first filter circuit, a first amplifying circuit, a mixer, a second filter circuit, a second amplifying circuit, a directional coupling module and a one-to-two power divider which are sequentially arranged; the other input end of the mixer is connected with the frequency hopping signal after filtering.
Furthermore, the three local oscillation synthesis unit comprises a third comb spectrum generator, a first filter circuit, a first amplifying circuit, a DDS, a second filter circuit, a second amplifying circuit, a directional coupling module and a one-to-two power divider which are sequentially arranged.
Furthermore, the frequency synthesis component further comprises a self-checking source synthesis unit, which is used for providing 2 paths of self-checking signals, realizing the fault detection function, carrying out self-checking on each internal unit circuit and module and reporting the self-checking result.
The invention has the following beneficial effects:
the broadband digital multi-beam array antenna system adopts antenna aperture multiplexing and time-sharing receiving, and switches the receiving channels of the left array and the right array of the antenna in a time-sharing manner through the switch in the digital down-conversion component, so that the power consumption of the system is reduced, and the hardware cost of the system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a three-dimensional view of a C-band wideband digital multi-beam array antenna system in accordance with an embodiment of the present invention.
Fig. 2 is a side view of a C-band wideband digital multi-beam array antenna system in accordance with an embodiment of the present invention.
Fig. 3 is a top view of a C-band wideband digital multi-beam array antenna system in accordance with an embodiment of the present invention.
Fig. 4 is a schematic diagram of an antenna array surface of a C-band wideband digital multi-beam array antenna system according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of the operation of the digital down-conversion module of the C-band wideband digital multi-beam array antenna system according to the embodiment of the present invention.
Fig. 6 is a schematic diagram of the operation of the frequency synthesis component of the C-band wideband digital multi-beam array antenna system according to the embodiment of the present invention.
The reference numerals of the main elements in the figures are explained as follows:
1-L-left array of antennas; 1-R-antenna right array; 2-L-left matrix frame; 2-R-right matrix frame; 3-a digital down conversion component; 4-frequency synthesis component; 5-power supply components; 6-radio frequency cable.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
A C-band broadband digital multi-beam array antenna system comprises an antenna array surface, a digital down-conversion assembly, a frequency synthesis assembly and a power supply assembly; the antenna array comprises a left antenna array, a left array frame for fixedly mounting the left antenna array, a right antenna array and a right array frame for fixedly mounting the right antenna array, and the left array frame and the right array frame are respectively positioned on the left side and the right side of the whole system structure; the digital down-conversion component is positioned at the lowest part of the whole system structure and is connected with the left antenna array and the right antenna array through radio frequency cables; the frequency synthesis component is positioned above the digital down-conversion component and is connected with the digital down-conversion component through a radio frequency cable; the power supply assembly supplies power for the digital down-conversion assembly and the frequency synthesis assembly.
Furthermore, the left antenna array and the right antenna array are sixteen-unit one-dimensional linear arrays, form a multi-beam directional diagram covering an airspace from-45 degrees to +45 degrees on an azimuth plane, and are used for receiving electromagnetic signals of the respective corresponding airspaces, and the left antenna array and the right antenna array work in a time-sharing manner.
Furthermore, the digital down-conversion component consists of a receiving channel, a local oscillator power divider and a power control network. The antenna array has sixteen receiving channels, each channel multiplexes two antennas, and the antennas are switched by a switch for use. The digital down-conversion component outputs sixteen paths of intermediate frequency signals after the signals are subjected to amplitude limiting, amplification or direct connection selection, gain control, switch filtering, three-time frequency conversion, amplification, filtering and gain control. In addition, it provides three local oscillation signals and control signals by frequency synthesis component, and the power supply is transferred to receiving channel by local oscillation power divider and power supply control network.
Furthermore, the frequency synthesis component is composed of circuits such as a clock reference unit, a self-checking source synthesis unit, a local oscillator synthesis unit, a two local oscillator synthesis unit, a three local oscillator synthesis unit, a system control and power supply processing unit and the like, provides 2 paths of one local oscillator signals, 2 paths of two local oscillator signals and 2 paths of three local oscillator signals for the digital down-conversion component, and provides 1 path of sampling clock signals for the AD sampling board. Meanwhile, the frequency synthesis assembly has a perfect fault detection function, carries out self-detection on each internal unit circuit and module and reports a self-detection result. In order to calibrate the amplitude phase consistency of the radio frequency channel, two paths of self-calibration sources are generated by the frequency synthesis assembly and coupled into the left antenna array and the right antenna array, and calibration is carried out after the acquisition of the receiving channel.
The invention is described in detail below with reference to the accompanying drawings:
fig. 1 is a three-dimensional view of a C-band broadband digital multi-beam array antenna system according to an embodiment of the present invention, fig. 2 is a side view of the C-band broadband digital multi-beam array antenna system according to the embodiment of the present invention, and fig. 3 is a top view of the C-band broadband digital multi-beam array antenna system according to the embodiment of the present invention.
The antenna array surface of the C-waveband broadband digital multi-beam array antenna system is divided into the left antenna array and the right antenna array, and the left antenna array and the right antenna array share one set of digital down-conversion assembly to form a multi-beam directional diagram in a time-sharing mode, so that the power consumption of the system is reduced, and the hardware cost of the system is reduced. Specifically, the method comprises the following steps:
as shown in fig. 1 to 3, the C-band broadband digital multi-beam array antenna system includes: the system comprises a left antenna array (1-L), a left array frame (2-L) for fixedly mounting the left antenna array (1-L), a right antenna array (1-R) and a right array frame (2-R) for fixedly mounting the right antenna array (1-R), which are respectively positioned at the left side and the right side of the whole system structure; the digital down-conversion component (3) is positioned at the lowest part of the whole system structure and is connected with the left antenna array (1-L) and the right antenna array (1-R) through a radio frequency cable (6); the frequency synthesis component (4) is positioned on the digital down-conversion component (3) and is connected with the digital down-conversion component through a radio frequency cable (6); the power supply component (5) provides power supply requirements for the digital down-conversion component (3) and the frequency synthesis component (4).
Fig. 4 is a schematic diagram of an antenna array of a C-band wideband digital multi-beam array antenna system according to an embodiment of the present invention, showing that the size of the antenna array is 16 (azimuth) × 5 (elevation). The 5 antenna units of the pitching surface are synthesized into a linear array through the power divider, and the azimuth surface comprises 16 linear arrays to form the whole antenna array surface. The left antenna array (1-L) and the right antenna array (1-R) are completely consistent and can be interchanged.
Fig. 5 is a schematic diagram of the operation of the digital down-conversion module of the C-band wideband digital multi-beam array antenna system according to the embodiment of the present invention. As shown in fig. 5, the digital down conversion module (3) is composed of two parts of module circuits, namely a receiving channel, a local oscillator power divider and a power control network. The digital down-conversion component (3) is provided with sixteen receiving channels, each channel multiplexes two antennas, and the antennas are switched to use through a switch. The digital down-conversion component (3) outputs sixteen paths of intermediate frequency signals after the electromagnetic signals are subjected to amplitude limiting, amplification or direct connection selection, gain control, switch filtering, third-time frequency conversion, amplification, filtering and gain control; the digital down-conversion component (3) provides three local oscillation signals and control signals by the frequency synthesis component (4), and the power supply component (5) provides power to be transmitted to a receiving channel through the local oscillation power divider and the power supply control network.
Fig. 6 is a schematic diagram of a frequency synthesis component of a C-band wideband digital multi-beam array antenna system according to an embodiment of the present invention. As shown in fig. 6, the frequency synthesis component (4) is composed of a clock reference unit, a self-checking source synthesis unit, a first local oscillator synthesis unit, a second local oscillator synthesis unit, a third local oscillator synthesis unit, a system control and power supply processing unit, and other circuits. The frequency synthesis component (4) provides 2 paths of first local oscillation signals, 2 paths of second local oscillation signals and 2 paths of third local oscillation signals for the digital down-conversion component (3), and provides 1 path of sampling clock signals and 2 paths of self-correcting signals at the same time. The device has a clock synchronization function, can synchronize an external 100MHz clock signal, has a perfect fault detection function, performs self-detection on internal unit circuits and modules, and reports a self-detection result.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A C-band wideband digital multi-beam array antenna system, comprising:
the antenna array surface consists of a left antenna array, a left array frame fixedly provided with the left antenna array, a right antenna array and a right array frame fixedly provided with the right antenna array, and the left antenna array and the right antenna array are respectively positioned on the left side and the right side of the whole system structure;
the digital down-conversion component is positioned at the lowest part of the whole system structure and is connected with the left antenna array and the right antenna array through radio frequency cables;
the frequency synthesis assembly is arranged in parallel with the digital down-conversion assembly, is positioned on the digital down-conversion assembly and is connected with the digital down-conversion assembly through a radio frequency cable;
the power supply component supplies power for the digital down-conversion component and the frequency synthesis component;
and the antenna left array and the antenna right array work in a time-sharing mode.
2. The C-band wideband digital multi-beam array antenna system according to claim 1, wherein: the antenna left array and the antenna right array are sixteen-unit one-dimensional linear arrays, form a multi-beam directional diagram covering an airspace from-45 degrees to +45 degrees on an azimuth plane, and are used for receiving electromagnetic signals of the airspace.
3. The C-band wideband digital multi-beam array antenna system of claim 2, wherein: the size of the array surface of the antenna array surface is 16 multiplied by 5; the 5 antenna units of the pitching surface are synthesized into a linear array through the power divider, the azimuth surface comprises 16 linear arrays to form a whole antenna array surface, and the 16 linear arrays are divided into a completely consistent and interchangeable antenna left array and an antenna right array.
4. The C-band wideband digital multi-beam array antenna system of claim 1, wherein: the digital down-conversion component outputs sixteen paths of intermediate frequency signals after amplitude limiting, amplification or direct selection, gain control, switch filtering, third-time frequency conversion, amplification, filtering and gain control on the received electromagnetic signals.
5. The C-band wideband digital multi-beam array antenna system according to claim 4, wherein: the digital down-conversion component comprises a receiving channel module circuit, a local oscillator power divider and a power supply control network; the three local oscillation signals and the control signal provided by the frequency synthesis component and the power supply signal are transmitted to a receiving channel through a local oscillation power division and power supply control network; the receiving channel module circuit is provided with sixteen receiving channels, and each receiving channel is shared by two antennas and is switched to be used through a switch.
6. The C-band wideband digital multibeam array antenna system of claim 1, wherein the frequency synthesis component is mainly composed of a clock reference unit, a local oscillator synthesizing unit, a second local oscillator synthesizing unit, a third local oscillator synthesizing unit, a system control and power supply processing unit; wherein, a local oscillator synthesis unit, two local oscillator synthesis units and three local oscillator synthesis units provide 2 way one local oscillator signal, 2 way two local oscillator signals and 2 way three local oscillator signals for digital down conversion subassembly respectively.
7. The C-band wideband digital multibeam array antenna system of claim 6, wherein the local oscillator synthesizing unit comprises a first comb spectrum generator, a first switch filter assembly, a first amplifier, a mixer, a second switch filter assembly, a second amplifier, a directional coupling module, and a one-to-two power divider, which are sequentially arranged; the other input end of the mixer is connected with the frequency hopping signal after filtering.
8. The C-band wideband digital multibeam array antenna system of claim 6, wherein the two local oscillator synthesis units comprise a second comb spectrum generator, a first filter circuit, a first amplifier circuit, a mixer, a second filter circuit, a second amplifier circuit, a directional coupling module, and a one-to-two power divider, which are sequentially arranged; the other input of the mixer is connected with the frequency hopping signal after being filtered.
9. The C-band broadband digital multi-beam array antenna system according to claim 6, wherein the three local oscillator synthesizing units comprise a third comb spectrum generator, a first filter circuit, a first amplifying circuit, a DDS, a second filter circuit, a second amplifying circuit, a directional coupling module, and a one-to-two power divider, which are sequentially arranged.
10. The C-band broadband digital multi-beam array antenna system according to claim 6, wherein the frequency synthesis component further comprises a self-checking source synthesis unit for providing 2 paths of self-checking signals, implementing a fault detection function, performing self-checking on internal unit circuits and modules, and reporting a self-checking result.
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