CN111952727B - Phased array antenna - Google Patents
Phased array antenna Download PDFInfo
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- CN111952727B CN111952727B CN202011004137.6A CN202011004137A CN111952727B CN 111952727 B CN111952727 B CN 111952727B CN 202011004137 A CN202011004137 A CN 202011004137A CN 111952727 B CN111952727 B CN 111952727B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a phased array antenna, comprising: the distributed framework has a regular dodecahedron overall structure, so that beams cover a preset airspace range; the phase control modules are arranged on the distributed framework; one end of each phase control module is connected with the TR component, and the other end of each phase control module performs beam scanning within the preset airspace range. The invention can realize the beam coverage of a large airspace range with omni-directional azimuth and pitching azimuth of about +/-120 degrees, has excellent scanning gain and gain flatness, and solves the problems of insufficient gain and low gain flatness in the traditional distributed phased array antenna.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a phased array antenna with a novel distributed antenna framework and large airspace coverage.
Background
In recent years, a distributed communication system with characteristics of cognition, dynamics and distribution is gradually formed, and the developed distributed cooperative networking communication mode is to split the functions of an expensive large-scale system into a large number of cheap small-scale units, and form the small-scale units into a flexible system by utilizing a network technology. With the deep development of a distributed cooperative communication system, future communication networks will change more and more towards characteristics of multiple targets, intellectualization, wide area distribution and the like. In the expected future, the wireless communication system forms a centreless small-sized unit discrete distribution in a distributed cooperative mode, so that intelligent communication and target search of the whole system are realized, and efficient real-time communication suitable for complex environments such as multi-target, intelligent, wide area distribution and the like is gradually formed. However, to realize intelligent communication and target search of the distributed system, one of the main works is to ensure barrier-free real-time information exchange of the wide area distribution units and to realize complex environment multi-task collaboration based on information interaction and data fusion, which requires that the radio frequency front end of the distributed system has electromagnetic wave receiving/transmitting capability covered by a large airspace and supports remote communication between the distributed units.
For the antenna design of the radio frequency front end, the current scheme for realizing large airspace coverage mainly comprises an omnidirectional antenna, a mechanism scanning antenna, a phased array antenna, a distributed antenna combination and the like. The omni-directional design of a single antenna has lower antenna gain, so that the requirement of long-distance communication under wide area distribution on the antenna gain cannot be met. While the mechanism scanning antenna can realize wide-area beam coverage, firstly the cost of the rotating mechanism is often higher, and meanwhile, the beam scanning speed is generally lower, so that the requirements of a future communication system on real-time performance and high efficiency are hardly met. The general phased array scheme and the distributed scheme are mostly composed of a traditional two/four-sided framework or columnar framework, and the gain flatness of a radiation pattern under the coverage of a large airspace is low. The existing spherical distributed framework can ensure the gain flatness of the antenna under the coverage of a large airspace, but basically consists of single array elements distributed on the spherical surface, so that the modularization degree of the whole phased array antenna design is low, and the antenna structure is complex.
Disclosure of Invention
The invention aims to provide a phased array antenna which can realize large airspace coverage and meet the requirements of module integration level, antenna gain and gain flatness.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
a phased array antenna comprising:
the distributed framework has a regular dodecahedron overall structure, so that beams cover a preset airspace range;
the phase control modules are arranged on the distributed framework; one end of each phase control module is connected with the TR component, and the other end of each phase control module performs beam scanning within the preset airspace range.
Preferably, the distributed framework comprises a plurality of frames, and each of the frames has a hollow regular pentagon in horizontal cross section.
Preferably, each of the frames is provided with a frame base;
the frame base is arranged on the inner side wall of the frame, and the phase control module is correspondingly arranged on the frame base.
Preferably, each of said frames is integrally provided with its said frame base;
all of the frames of the distributed architecture are integrally disposed.
Preferably, each phase control module comprises a module base and a plurality of microstrip line arrays;
the module base is fixedly connected with the frame base, the horizontal section of the module base is a regular pentagon, and the module base is matched with the frame to be embedded into the frame;
the outer side wall of each microstrip line array is fixedly connected with the module base, one end of each microstrip line array is connected with the TR component, and the other end of each microstrip line array performs beam scanning according to radio frequency signals of the TR component.
Preferably, the module base comprises a plurality of metal walls and a plurality of feed holes;
all the metal walls are arranged on the end face of the module base at intervals along a preset direction, and each metal wall is connected with the microstrip line array correspondingly;
all the feed holes are arranged at intervals along the long side direction of the metal wall, and each feed hole penetrates through the module base and is used for accommodating a feed connector; one end of the feed connector is connected with the microstrip line array, and the other end of the feed connector is connected with the TR component.
Preferably, each microstrip array comprises a plurality of microstrip array elements, and each microstrip array element is arranged corresponding to each feed hole;
the outer side wall of each microstrip array element is fixedly connected with the metal wall, one end of each microstrip array element is connected with the TR component through the corresponding feed connector in the feed hole, and the other end of each microstrip array element performs beam scanning according to radio frequency signals of the TR component.
Preferably, each microstrip array element comprises a coupling feeder and a microstrip oscillator;
the coupling feeder line is connected with the feed connector;
the first end of the microstrip oscillator is fixedly connected with the metal wall, and the second end of the microstrip oscillator is connected with the coupling feeder line.
Preferably, all of the metal walls are integrally provided with the module base.
Preferably, the preset airspace range is an azimuth plane of 360 degrees and a pitch plane of +/-120 degrees.
Compared with the prior art, the invention has at least one of the following advantages:
the distributed architecture of the phased array antenna provided by the invention is integrally provided with a regular dodecahedron structure, so that the phased array antenna at least comprises three phased array modules in a visible area of any space pointing angle in a space domain range, and the phased array antenna can realize beam coverage in a large space domain range of about +/-120 degrees in azimuth plane omni-directional and elevation plane.
The invention can comprise twelve phased modules, wherein when nine phased modules are arranged, each phased module can be provided with one hundred microstrip array elements, so that the phased array antenna has higher module integration level.
The phased array antenna has excellent scanning gain and gain flatness in a large airspace range with an omnidirectional azimuth plane and a 120 DEG pitch plane, and solves the problems of insufficient gain and low gain flatness in the traditional distributed phased array antenna.
The invention not only has the simplicity of the structure and the convenience of installation and configuration, but also is convenient for adjusting the structure of the phased array antenna according to the actual engineering requirement, so that the phased array antenna has wide applicability.
Drawings
Fig. 1 is a schematic structural diagram of a phased array antenna according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a distributed architecture of a phased array antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a phased array antenna according to an embodiment of the present invention;
fig. 4 is a top view of a module base of a phased array antenna according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a microstrip line array of a phased array antenna according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a conical radiation area formed by three groups of phased array modules of a phased array antenna according to an embodiment of the present invention;
FIG. 7 shows the scan gain at different scan angles in a low frequency tapered radiation region of a phased array antenna according to an embodiment of the present invention;
FIG. 8 shows the scan gain at different scan angles in a tapered radiation region at an intermediate frequency of a phased array antenna according to an embodiment of the present invention;
fig. 9 shows the scan gain at different scan angles in the tapered radiation region at high frequency for a phased array antenna according to an embodiment of the present invention.
Detailed Description
A phased array antenna according to the present invention is described in further detail below with reference to the accompanying drawings and detailed description. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the invention. For a better understanding of the invention with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or essential characteristics thereof.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1 to 9, a phased array antenna according to this embodiment includes: a distributed frame 10 having an overall structure of a regular dodecahedron so that the beam covers a preset airspace range; a plurality of phase control modules 20 disposed on the distributed frame 10; one end of each phase control module 20 is connected with the TR module, and the other end performs beam scanning within the preset airspace range.
With continued reference to fig. 1 and 2, the distributed architecture 10 includes a plurality of frames 101, and each of the frames 101 has a hollow regular pentagon in horizontal cross section.
It will be appreciated that in some other embodiments, each of the frames 101 is provided with a frame base 1011; the frame base 1011 is disposed on an inner sidewall of the frame 101, and the phase control module 20 is correspondingly disposed on the frame base 1011.
Specifically, the overall structure of the distributed frame 10 is a hollow regular dodecahedron, where nine surfaces are formed by nine frames 101, the other three surfaces are hollow surfaces, the nine frames 101 are connected into a whole, and the three hollow surfaces form an irregular notch through which the necessary cables and supporting structures of the phased array antenna can be placed inside the distributed frame 10, but the invention is not limited thereto.
Specifically, the frame base 1011 is irregularly shaped, the hollow area 1012 complementary to the frame base 1011 is irregularly shaped, and the hollow area 1012 is used for avoiding a space for the feeding structure in the phase control module 20, so that the irregular shapes of the frame base 1011 and the hollow area 1012 are related to the installation position of the feeding structure, but the invention is not limited thereto.
In this embodiment, the frame base 1011 of each frame 101 is further provided with six first screw holes 1013 so that the frame 101 may be fixedly connected to the phase control module 20.
With continued reference to fig. 1 and 2, each of the frames 101 is integrally disposed with the frame base 1011 thereof; all of the frames 101 of the distributed architecture 10 are integrally provided.
Specifically, the distributed frame 10 is integrally disposed between the frames 101 and between each frame 101 and the frame bottom 1011 thereof, so that the distributed frame 10 has an integrated structure, which not only can satisfy the simplicity of the frame structure, but also can achieve the convenience of installation and configuration, but the invention is not limited thereto.
Referring to fig. 3 to 5, each of the phase control modules 20 includes a module base 201 and a plurality of microstrip line arrays 202; the module base 201 is fixedly connected with the frame base 1011, and the horizontal section of the module base 201 is a regular pentagon, and is matched with the frame 101 to be embedded into the frame 101; the outer side wall of each microstrip line array 202 is fixedly connected with the module base 201, one end of each microstrip line array 202 is connected with the TR assembly, and the other end of each microstrip line array 202 performs beam scanning according to radio frequency signals of the TR assembly.
Specifically, the distributed architecture 10 includes nine frames 101, and each of the phase control modules 20 is correspondingly disposed on each of the frames 101, so that the number of the phase control modules 20 is nine; since the height of the frame base 1011 is lower than the height of the frame 101, there is a certain height difference between the frame base 1011 and the frame 101, the height difference between the module base 201 and the height difference between the frame base 1011 and the frame 101 in each of the phase control modules 20 is the same, and the horizontal cross section of the module base 201 is a regular pentagon, so that the module base 201 can be embedded in the frame 101, but the present invention is not limited thereto.
With continued reference to fig. 3 to 5, the module base 201 includes a plurality of metal walls 2011 and a plurality of feed holes 2012; all the metal walls 2011 are arranged on the end face of the module base 201 at intervals along a preset direction, and each metal wall 2011 is connected with the microstrip line array 202 correspondingly; all the feeding holes 2012 are arranged at intervals along the long side direction of the metal wall 2011, and each feeding hole 2012 penetrates through the module base 201 to accommodate a feeding connector; one end of the feed connector is connected with the microstrip line array 202, and the other end is connected with the TR assembly.
It will be appreciated that in some other embodiments, all of the metal walls 2011 are integrally provided with the module base 201.
Specifically, in the present embodiment, the module base 201 of each phase control module 20 includes twelve metal walls 2011, and a horizontal cross section of each metal wall 2011 is rectangular; twelve metal walls 2011 are symmetrically arranged on the end face of the module base 201, and symmetry axes of the twelve metal walls 2011 are coincident with a certain symmetry axis of the module base 201; the lengths of the metal walls 2011 decrease in sequence along the direction away from the symmetry axis, so that the lengths of the two metal walls 2011 adjacent to the symmetry axis are longest, and the lengths of the two metal walls 2011 farthest from the symmetry axis are shortest.
The module base 201 is provided with one hundred feeding holes 2012, and all the feeding holes 2012 are arranged at intervals along the long side direction of the metal walls 2011, so that the number of the feeding holes 2012 arranged corresponding to each metal wall 2011 is related to the length of each metal wall 2011; the number of the feeding holes 2012 corresponding to each metal wall 2011 in the direction from the metal wall 2011 with the shortest length to the other metal wall 2011 with the shortest length through the symmetry axis is respectively: 2. 6, 9, 10, 11, 12, 11, 10, 9, 6 and 2.
The module base 201 is further provided with six first through holes 2013, so that the first fastening screws 203 can sequentially pass through the first through holes 2013 and the first threaded holes 1013 to realize fastening connection between the module base 201 and the frame 101.
With continued reference to fig. 3 to 5, each microstrip array 202 includes a plurality of microstrip array elements 2020, and each microstrip array element 2020 is disposed corresponding to each feed hole 2012; the outer side wall of each microstrip array element 2020 is fixedly connected with the metal wall 2011, one end of each microstrip array element 2020 is connected with the TR assembly through the corresponding feed connector in the feed hole 2012, and the other end performs beam scanning according to the radio frequency signal of the TR assembly.
It will be appreciated that in some other embodiments, each of the microstrip array elements 2020 includes a coupling feed line 2021 and a microstrip oscillator 2022; the coupling feeder 2021 is connected to the feeding connector; the first end of the microstrip oscillator 2022 is fixedly connected with the metal wall 2011, and the second end of the microstrip oscillator 2022 is connected with the coupling feeder 2021.
Specifically, each of the phase control modules 20 includes twelve microstrip line arrays 202, each of the microstrip line arrays 202 is fixedly connected with each of the metal walls 2011, and the number of the microstrip line arrays 202 including the microstrip array elements 2020 is related to the length of each of the metal walls 2011; the number of the microstrip array elements 2020 in the microstrip array 202 correspondingly connected to each metal wall 2011 along the direction from the shortest metal wall 2011 to the shortest metal wall 2011 through the symmetry axis is respectively: 2. 6, 9, 10, 11, 12, 11, 10, 9, 6 and 2. Therefore, each of the phase control modules 20 includes one hundred microstrip array elements 2020, and nine of the phase control modules 20 include nine hundred microstrip array elements 2020, so that the phase control modules 20 based on the distributed architecture 10 have a higher integration level, but the invention is not limited thereto.
In this embodiment, as shown in fig. 5, fig. 5 (a) is a side view of a microstrip line array, fig. 5 (b) is a top view of a location of a microstrip line array, and fig. 5 (c) is an overall side view of a location of a microstrip line array; the number of the microstrip array elements 2020 in each microstrip array 202 is consistent with the number of the feed holes 2012 corresponding to each metal wall 2011, and each microstrip array element 2020 is corresponding to each feed hole 2012. All the microstrip array elements 2020 have the same structure and all adopt Ka-band array elements; each Ka-band element has a feeding structure including a feeding connector disposed in each feeding hole 2012, one end of the feeding connector may be connected to the Ka-band element, and the other end may be electrically connected to the TR module through a KK connector.
Each Ka-band array element is a double-sided copper-clad microstrip structure, one side of each Ka-band array element is a feed side, the feed side is the coupling feeder 2021, the coupling feeder 2021 is formed by cascading three microstrip lines with different widths, and a first end of the coupling feeder 2021 can be electrically connected with an inner core of the feed connector through welding, so that the first end of each Ka-band array element can be electrically connected with the TR assembly through the corresponding feed connector. The other side of the Ka-band array element is the microstrip oscillator 2022, and the horizontal section of the microstrip oscillator 2022 is T-shaped; the center of the microstrip oscillator 2022 is provided with a vertical straight slit 2023, and the straight slit 2023 can be used for dividing the radiation ends at two sides of the microstrip oscillator 2022 and is helpful for realizing matching of input impedance of the antenna; the first end of the microstrip oscillator 2022 is a complete copper-clad area 2025, and the fixed connection between the Ka-band array element and the metal wall 2011 can be realized by welding between the copper-clad area 2025 and the metal wall 2011, so as to realize the fixed connection between the microstrip array 202 and the module base 201; a through metallization via 2024 is disposed between the second end of the microstrip oscillator 2022 and the second end of the coupling feeder 2021, and an electrical short circuit between the microstrip oscillator 2022 and the coupling feeder 2021 at a proper position can be implemented through the metallization via 2024, so as to change a current path, and help to expand the working bandwidth of the microstrip oscillator 2022, thereby expanding the working bandwidth of the phased array antenna; a parasitic rectangular patch 2026 is arranged above the microstrip oscillator 2022, and the parasitic rectangular patch 2026 can also be used for expanding the working bandwidth of the microstrip oscillator 2022.
In addition, the phase control module further includes 12 antenna battens 204, and each antenna batten 204 is disposed corresponding to each microstrip line array 202 and each metal wall 2011; each antenna bead 204 includes a number of first rectangular notches 2045 and a number of rectangular protrusions 2047.
In this embodiment, the number of the first rectangular notches 2045 in each antenna molding 204 is consistent with the number of the feed holes 2012 corresponding to each metal wall 2011, and each first rectangular notch 2045 may be used to accommodate the copper-clad area 2025 of each Ka-band element; the rectangular protrusions 2047 are located between every two adjacent first rectangular notches 2045, and the rectangular protrusions 2047 are matched with second rectangular notches 2027 between every two adjacent Ka band array elements, and the rectangular protrusions 2047 and the second rectangular notches 2027 can perform positioning function when the copper-clad area 2025 and the metal wall 2011 are welded, so that welding between the copper-clad area 2025 and the metal wall 2011 is facilitated.
At least one second through hole 2044 is provided on each antenna pressing strip 204, so that a second fastening screw 205 can sequentially pass through the second through hole 2044 and the second threaded hole 2014 on the module base 201 to realize the fixed connection of the antenna pressing strips 204 and the module base 201.
With continued reference to fig. 6, the preset airspace range is an azimuth plane of 360 ° and a pitch plane of ±120°.
Specifically, in this embodiment, the phased array antenna includes at least three phased array modules 20 in a visible area of any spatial pointing angle. As shown in fig. 6, with the direction passing through the center of the distributed architecture 10 and the common point of the three phased modules 20 as the normal, each three phased modules 20 may be used to support beam coverage in a conical area 30 that is about 40 ° from the normal pitch angle and has an azimuth angle of 360 ° omni-direction, and then nine phased modules 20 may implement beam scanning in the azimuth plane of 360 ° and the nodding plane of ±120°, but the invention is not limited thereto.
Referring to fig. 7 to fig. 9, fig. 7 to fig. 9 are graphs showing the scanning gains of the phased array antenna when the scanning pitch angle in the conical region 30 is equal to 10 °, 20 °, 30 ° and 40 ° at different operating frequency points and in the scanning azimuth angle range of 0 ° to 360 °, wherein all the Ka-band array elements are excited as sub-excitation. In the cone-shaped area 30 and within the 2GHz working bandwidth, the scanning gain of the phased array antenna is at 28.11 dB-30.65 dB level (as shown in figure 7), the scanning gain of the phased array antenna is at 28.24 dB-30.81 dB level (as shown in figure 8) at the intermediate frequency, and the scanning gain of the phased array antenna is at 28.36 dB-30.92 dB level (as shown in figure 9) at the high frequency, so that the scanning gain flatness of the phased array antenna is better than 2.54dB, 2.57dB and 2.56dB at the three working frequency points (34.0 GHz, 35.0GHz and 36.0GHz frequency points) of the low frequency, the intermediate frequency and the high frequency in the scanning range (azimuth angle 0-360 DEG, pitch angle 10 °, 20 °, 30 DEG and 40 ℃). Because the visible area of the phased array antenna comprises three phased array modules 20 under any scanning angle in the airspace range, the scanning gain of the phased array antenna is not lower than 28.11dB in the preset airspace range of about + -120 DEG of the azimuth plane omnidirectional and the elevation plane, the scanning gain flatness is better than 2.57dB, and the phased array antenna has excellent scanning gain flatness and higher scanning gain.
In addition, in this embodiment, the number of the frames 101 and the phased modules 20 in the distributed architecture 10 may be increased or decreased according to the requirements of different beams to cover the airspace range; the number, the distance and the layout of the microstrip array elements 2020 in the phased array module 20 can be changed and adjusted according to different requirements of the gain and the working broadband of the phased array antenna, and the working broadband of the phased array antenna and the size of the frame 101 can be adjusted according to the antenna scaling principle, so that the phased array antenna has wide applicability.
In summary, the overall structure of the distributed architecture of the phased array antenna provided in this embodiment is a regular dodecahedron, where nine planes are formed by nine frames, and nine phased array modules are correspondingly fixed to the nine frames of the distributed architecture, so that the phased array antenna at least includes three phased array modules in a visible area of any spatial pointing angle in a airspace range, and thus the phased array antenna achieves beam coverage in a large airspace range of about ±120° in azimuth and elevation. Each phased module is provided with one hundred microstrip array elements, so that the phased array antenna has higher module integration level, and simultaneously has excellent scanning gain and gain flatness in a large airspace range with omni-directional azimuth plane and about +/-120 DEG pitch plane. The invention has the advantages of simple structure, convenient installation and configuration and high module integration level, solves the problems of insufficient gain and low gain flatness in the traditional distributed phased array antenna, and provides powerful guarantee for high-efficiency real-time communication between wide-area distributed units.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (6)
1. A phased array antenna, comprising:
a distributed framework (10) with an overall structure of a regular dodecahedron so that the beam covers a preset airspace range;
the phase control modules (20) are arranged on the distributed framework (10); one end of each phase control module (20) is connected with the TR component, and the other end of each phase control module scans beams in the preset airspace range; the phased array antenna at least comprises three phased array modules in a visible area of any space pointing angle;
the distributed framework (10) comprises a plurality of frames (101), wherein nine surfaces of the distributed framework (10) are formed by nine frames (101), the other three surfaces are blank surfaces, the nine frames (101) are connected into a whole, the three blank surfaces form an irregular notch, and the horizontal section of each frame (101) is a hollow regular pentagon; each frame (101) is provided with a frame base (1011); the frame base (1011) is arranged on the inner side wall of the frame (101), and the phase control module (20) is correspondingly arranged on the frame base (1011);
each phase control module (20) comprises a module base (201) and a plurality of microstrip line arrays (202);
the module base (201) is fixedly connected with the frame base (1011), and the horizontal section of the module base (201) is in a regular pentagon shape and is matched with the frame (101) so as to be embedded into the frame (101);
the outer side wall of each microstrip line array (202) is fixedly connected with the module base (201), one end of each microstrip line array (202) is connected with the TR component, and the other end of each microstrip line array performs beam scanning according to radio frequency signals of the TR component;
the module base (201) comprises a plurality of metal walls (2011) and a plurality of feed holes (2012); all the metal walls (2011) are arranged on the end face of the module base (201) at intervals along a preset direction, and each metal wall (2011) is correspondingly connected with the microstrip line array (202);
all the feed holes (2012) are arranged at intervals along the long side direction of the metal wall (2011), and each feed hole (2012) penetrates through the module base (201) and is used for accommodating a feed connector; one end of the feed connector is connected with the microstrip line array (202), and the other end of the feed connector is connected with the TR component.
2. The phased array antenna of claim 1,
each frame (101) is integrally arranged with the frame base (1011) thereof;
all the frames (101) of the distributed architecture (10) are integrally arranged.
3. The phased array antenna of claim 1,
each microstrip array (202) comprises a plurality of microstrip array elements (2020), and each microstrip array element (2020) is arranged corresponding to each feed hole (2012);
the outer side wall of each microstrip array element (2020) is fixedly connected with the metal wall (2011), one end of each microstrip array element (2020) is connected with the TR component through the corresponding feed connector in the feed hole (2012), and the other end of each microstrip array element is used for carrying out beam scanning according to radio frequency signals of the TR component.
4. A phased array antenna as claimed in claim 3, characterised in that each of said microstrip array elements (2020) comprises a coupling feed line (2021) and a microstrip element (2022);
-said coupling feed line (2021) is connected to said feed connector;
the first end of the microstrip oscillator (2022) is fixedly connected with the metal wall (2011), and the second end of the microstrip oscillator (2022) is connected with the coupling feeder line (2021).
5. The phased array antenna of claim 1,
all the metal walls (2011) are integrally arranged with the module base (201).
6. The phased array antenna of claim 1, wherein the predetermined spatial range is 360 ° azimuth plane and ±120° elevation plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004137.6A CN111952727B (en) | 2020-09-22 | 2020-09-22 | Phased array antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004137.6A CN111952727B (en) | 2020-09-22 | 2020-09-22 | Phased array antenna |
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| Publication Number | Publication Date |
|---|---|
| CN111952727A CN111952727A (en) | 2020-11-17 |
| CN111952727B true CN111952727B (en) | 2023-05-16 |
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| CN202011004137.6A Active CN111952727B (en) | 2020-09-22 | 2020-09-22 | Phased array antenna |
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