CN115863978A - Ultra-wideband dual-polarized phased array antenna - Google Patents
Ultra-wideband dual-polarized phased array antenna Download PDFInfo
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- CN115863978A CN115863978A CN202310009563.6A CN202310009563A CN115863978A CN 115863978 A CN115863978 A CN 115863978A CN 202310009563 A CN202310009563 A CN 202310009563A CN 115863978 A CN115863978 A CN 115863978A
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Abstract
The invention discloses an ultra-wideband dual-polarized phased array antenna, which comprises: the antenna is provided with a metal bottom plate; an antenna array disposed on the antenna mounting metal chassis, the antenna array comprising: a plurality of dual polarized antenna elements cascaded to each other, each of the dual polarized antenna elements comprising: the antenna comprises a first antenna unit and a second antenna unit, wherein the first antenna unit and the second antenna unit are mutually orthogonally arranged on the antenna mounting metal base plate. The invention improves the mutual coupling among the antenna units and further widens the bandwidth of the array antenna; large-angle blind-spot-free work is realized through large-angle scanning matching design based on a frequency selective surface technology; the ultra-wideband balanced feed is realized by adopting a Marchand wideband balun feed structure; the high-efficiency radiation of the antenna is realized through the design of a low-loss low-scattering transition structure from the coplanar waveguide to the microstrip line.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an ultra-wideband dual-polarized phased array antenna.
Background
With the rapid development of wireless communication systems, the demand for dual-polarized, wideband, wide-angle scanning phased array antennas is increasing. The tightly-coupled array antenna is a great hotspot of the research in the antenna field in recent years, is used as one of the array antennas, skillfully applies mutual coupling among antenna units to widen the bandwidth of the array antenna, has a series of advantages of low profile, ultra-wideband, large-angle scanning and the like, and has relatively few designs of dual-polarized ultra-wideband array antennas based on a frequency selection surface tight coupling technology. .
In the prior art, the performance of the conventional phased array antenna is sharply deteriorated due to the coupling between the elements, and the strong mutual coupling between the elements must be suppressed, so that the excellent performance of ultra-wideband and large-angle scanning is difficult to realize.
Disclosure of Invention
The invention aims to provide an ultra-wideband dual-polarized phased array antenna. The phased array antenna aims to solve the problems that in the prior art, the performance of the traditional phased array antenna is rapidly deteriorated due to the coupling between the units, the strong mutual coupling between the units must be inhibited, and the excellent performance of ultra-wideband and large-angle scanning is difficult to realize.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides an ultra-wideband dual-polarized phased array antenna, which comprises:
the antenna is provided with a metal bottom plate;
an antenna array disposed on the antenna mounting metal chassis, the antenna array comprising: a plurality of mutually cascaded dual polarized antenna elements,
each of the dual-polarized antenna units includes: a first antenna element and a second antenna element, the first antenna element and the second antenna element being disposed orthogonally to each other on the antenna mounting metal base plate,
the first antenna unit and the second antenna unit both comprise:
a double-layer dielectric slab;
a tightly coupled pole antenna element disposed on the double-layer dielectric plate;
the first metalized through hole is arranged on the double-layer dielectric plate;
the Marchand broadband balun is connected with the tightly coupled pole antenna unit through the first metalized through hole and is used for realizing ultra-wideband balanced feed;
and the first metal patch is arranged on the double-layer dielectric plate and used for enhancing the coupling effect.
Preferably, a first slot is arranged on the first antenna unit, a second slot is arranged on the second antenna unit, the first slot is matched with the second slot, and the first antenna unit and the second antenna unit are orthogonally nested in a crossed manner through the first slot and the second slot so as to realize dual polarization.
Preferably, the tightly coupled pole sub-antenna unit includes: the second metal patch, third metal patch and the fourth metal patch that set up side by side, the second metal patch with the feed point department of third metal patch adopts the trapezium structure to widen the antenna bandwidth.
Preferably, the double-layer dielectric plate includes: the composite board comprises an upper dielectric board, a lower dielectric board and a prepreg, wherein the upper dielectric board and the lower dielectric board are bonded through the prepreg.
Preferably, the Marchand broadband balun includes:
the inner conductor is used for realizing ultra-wideband impedance matching;
two fifth metal patches etched on the outer sides of the upper dielectric plate and the lower dielectric plate, respectively;
the square grooves are etched on the fifth metal patch at intervals, and the two arms of the balun are connected to the tightly-coupled pole antenna unit through the two metallized through holes;
the two balun arms are connected with the tightly coupled pole antenna unit through the first metalized through hole.
Preferably, the square grooves are symmetrically arranged on two sides of the double-layer dielectric slab, and the square grooves are of a gradual change structure, so that broadband impedance matching is realized.
Preferably, the number of the first metal patches is two, the two first metal patches are symmetrically etched on the upper surface of the upper dielectric plate and the lower surface of the lower dielectric plate respectively, and the two first metal patches cover the upper side and the lower side of the tightly-coupled dipole antenna unit respectively and are used for enhancing the coupling effect.
Preferably, the first antenna unit and the second antenna unit further include: and the frequency selective surface broadband matching layer is arranged on the double-layer dielectric plate, and the frequency selective surface broadband matching layer and the tightly-coupled pole antenna unit are positioned on the same layer so as to realize the broadband matching of the free space of the antenna radiation band.
Preferably, the lower end of the inner conductor is a multi-section impedance gradual change line, and the upper end of the inner conductor is a single-section trapezoidal gradual change line, so that ultra-wideband impedance matching is realized.
Preferably, the first antenna unit and the second antenna unit each further include: a transition structure of microstrip line to coplanar waveguide and an SSMP connector,
the transition structure for converting the microstrip line into the coplanar waveguide comprises:
a second metallized via;
a third metallized via for inhibiting electromagnetic leakage;
a coplanar waveguide transmission line transitioning down onto the inner conductor through the second metallized via,
the transition structure for converting the microstrip line into the coplanar waveguide is used for realizing high-efficiency radiation of the antenna, and the SSMP connector is connected with the central conduction band structure of the coplanar waveguide transmission line.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an ultra-wideband dual-polarized phased array antenna, which improves mutual coupling between antenna units by adding metal patches on a first antenna unit and a second antenna unit, and further widens the bandwidth of the array antenna; large-angle blind-spot-free work is realized through a large-angle scanning matching design based on a frequency selective surface technology; the ultra-wideband balanced feed is realized by adopting a Marchand wideband balun feed structure; the high-efficiency radiation of the antenna is realized through the design of a low-loss and low-scattering transition structure from the coplanar waveguide to the microstrip line.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
fig. 1 is a schematic structural diagram of an ultra-wideband dual-polarized phased array antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first antenna unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second antenna unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an orthogonal structure of a first antenna unit and a second antenna unit according to an embodiment of the present invention;
fig. 5 is a schematic front structure diagram of a first antenna unit or a second antenna unit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a tightly coupled pole antenna unit according to an embodiment of the present invention;
fig. 7 is a schematic view of a double-layer dielectric slab structure according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of a first antenna unit or a second antenna unit according to an embodiment of the present invention;
fig. 9 is a schematic diagram of an inner conductor structure of a Marchand broadband balun according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram illustrating transition of a microstrip line to a CPW according to an embodiment of the present invention.
Description of reference numerals: 1-antenna array, 2-dual-polarized antenna unit, 3-antenna installation metal bottom plate, 4-first antenna unit, 5-second antenna unit, 6-tightly coupled pole sub-antenna unit, 7-Marchand broadband balun, 8-first metal patch, 9-frequency selection surface broadband matching layer, 10-first metalized via hole, 11-double-layer dielectric plate, 12-microstrip line to coplanar waveguide transition structure, 13-SSMP connector, 14-inner conductor, 15-fifth metal patch, 16-square groove, 17-second metalized via hole, 18-third metalized via hole, 19-coplanar waveguide transmission line, 401-first slot, 501-second slot, 601-second metal patch, 602-third metal patch, 603-fourth metal patch, 1101-upper dielectric plate, 1102-lower dielectric plate, 1103-prepreg, 1401-multi-section impedance gradient line, 1402-single section trapezoid metal gradient line, 1501-upper layer third metal patch, 1502-1901-lower layer metal patch, and central conduction band structure.
Detailed Description
The ultra-wideband dual-polarized phased array antenna proposed by the present invention is further described in detail with reference to fig. 1 to 10 and the detailed description below. 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 drawn to a non-precise scale for the purpose of convenience and clarity only to aid in the description of the embodiments of the invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, etc. shown in the drawings and attached to the description are only for understanding and reading the disclosure of the present disclosure, and are not for limiting the scope of the present disclosure, so they do not have the essential meaning in the art, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure.
In view of the fact that the performance of the conventional phased array antenna in the prior art is drastically deteriorated due to the coupling between the elements, the strong mutual coupling between the elements must be suppressed, and it is difficult to achieve the excellent performance of ultra-wideband and large angle scanning.
The present embodiment provides an ultra-wideband dual-polarized phased array antenna, including: the antenna is provided with a metal bottom plate; an antenna array 1 (shown in fig. 1) disposed on the antenna mounting metal chassis 3, the antenna array 1 including: a plurality of dual-polarized antenna units 2 cascaded to each other, each of the dual-polarized antenna units 2 comprising: a first antenna unit 4 and a second antenna unit 5, wherein the first antenna unit 4 and the second antenna unit 5 are arranged on the antenna mounting metal base plate 3 in an orthogonal mode.
Referring to fig. 5, each of the first antenna unit 4 and the second antenna unit 5 includes: a double-layer dielectric plate 11; a tightly coupled pole antenna element 6 disposed on the double-layer dielectric plate 11; a first metalized via 10 disposed on the double-layer dielectric plate 11; the Marchand broadband balun 7 is connected with the tightly coupled pole sub-antenna unit 6 through the first metalized through hole 10 and used for realizing ultra-wideband balanced feed; and the first metal patch 8 is arranged on the double-layer dielectric plate 11 and used for enhancing the coupling effect.
Referring to fig. 2 and 3, a first slot 401 is disposed on the first antenna element 4, a second slot 501 is disposed on the second antenna element 5, the first slot 401 is matched with the second slot 501, and the first antenna element 4 and the second antenna element 5 are orthogonally cross-nested through the first slot 401 and the second slot 501 (the orthogonal schematic diagram is specifically shown in fig. 4), so as to implement dual polarization.
Referring to fig. 6, the tightly coupled pole sub-antenna unit 6 includes: the antenna comprises a second metal patch 601, a third metal patch 602 and a fourth metal patch 603 which are arranged side by side, wherein the feed points of the second metal patch 601 and the third metal patch 602 adopt a trapezoidal structure to widen the bandwidth of the antenna.
Referring to fig. 7, the double-layer dielectric plate 11 includes: the composite board comprises an upper-layer dielectric board 1101, a lower-layer dielectric board 1102 and a prepreg 1103, wherein the upper-layer dielectric board 1101 and the lower-layer dielectric board 1102 are bonded through the prepreg 1103.
The Marchand broadband balun 7 comprises: an inner conductor 14 for implementing ultra-wideband impedance matching; two fifth metal patches 15 (an upper fifth metal patch 1501 and a lower fifth metal patch 1502 as shown in fig. 8) etched on the outer sides of the upper dielectric plate 1101 and the lower dielectric plate 1102, respectively; a plurality of square grooves 16, wherein the square grooves 16 are etched on the fifth metal patch 15 at intervals, and two arms of the balun are connected to the tightly coupled pole antenna unit through two metalized through holes; the two balun arms are connected with the tightly coupled pole antenna unit through the first metalized through hole.
The square grooves 16 are symmetrically arranged on two sides of the double-layer dielectric plate, and the square grooves 16 are of a gradual change structure to achieve broadband impedance matching.
The number of the first metal patches 8 is two, the two first metal patches 8 are symmetrically etched on the upper surface of the upper dielectric plate 1101 and the lower surface of the lower dielectric plate 1102 respectively, and the two first metal patches 8 cover the upper side and the lower side of the tightly-coupled dipole antenna unit 6 respectively for enhancing the coupling effect.
The first antenna unit 4 and the second antenna unit 5 further include: and the frequency selective surface broadband matching layer 9 is arranged on the double-layer dielectric plate 11, and the frequency selective surface broadband matching layer 9 and the tightly-coupled pole antenna unit 6 are positioned on the same layer so as to realize the broadband matching of the free space of the antenna radiation band.
Referring to fig. 9, the lower end of the inner conductor is a multi-section impedance gradient 1401, and the upper end of the inner conductor is a single-section trapezoidal gradient 1402, which is used for implementing ultra-wideband impedance matching.
Referring to fig. 10, each of the first antenna unit 4 and the second antenna unit 5 further includes: a microstrip line-to-coplanar waveguide transition structure (microstrip line-to-CPW transition structure) 12 and an SSMP connector 13.
The microstrip line-to-coplanar waveguide transition structure 12 includes: a second metallized via 17; a third metalized via 18 for suppressing electromagnetic leakage; and a coplanar waveguide transmission line 19 that is transited downward to the inner conductor 14 through the second metalized via 18, wherein the microstrip-to-coplanar waveguide transition structure is used to implement high-efficiency radiation of the antenna, and the SSMP connector is connected to the central conduction band structure 1901 of the coplanar waveguide transmission line 19 to implement input or output of a signal.
In summary, the present embodiment provides an ultra-wideband dual-polarized phased array antenna, which increases metal patches on a first antenna unit and a second antenna unit to improve mutual coupling between the antenna units, and further broadens the bandwidth of the array antenna; large-angle blind-spot-free work is realized through a large-angle scanning matching design based on a frequency selective surface technology; an ultra-wideband Marchand wideband balun 7 feed structure is adopted to realize ultra-wideband balanced feed; the high-efficiency radiation of the antenna is realized through the design of a low-loss low-scattering transition structure from the coplanar waveguide to the microstrip line.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the apparatuses and methods disclosed in the embodiments herein can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments herein. In this regard, each block in the flowchart or block diagrams may represent a module, a program, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments herein may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. An ultra-wideband dual-polarized phased array antenna, comprising:
the antenna is provided with a metal bottom plate;
an antenna array disposed on the antenna mounting metal chassis, the antenna array comprising: a plurality of mutually cascaded dual-polarized antenna elements,
each of the dual-polarized antenna units includes: a first antenna element and a second antenna element, the first antenna element and the second antenna element being disposed orthogonally to each other on the antenna mounting metal base plate,
the first antenna unit and the second antenna unit both comprise:
a double-layer dielectric plate;
a tightly coupled pole antenna element disposed on the double-layer dielectric plate;
the first metalized through hole is arranged on the double-layer dielectric plate;
the Marchand broadband balun is connected with the tightly coupled pole antenna unit through the first metalized through hole and is used for realizing ultra-wideband balanced feed;
and the first metal patch is arranged on the double-layer dielectric plate and used for enhancing the coupling effect.
2. The ultra-wideband dual-polarized phased array antenna according to claim 1, wherein a first slot is provided on said first antenna element, a second slot is provided on said second antenna element, said first slot and said second slot cooperate, said first antenna element and said second antenna element are orthogonally cross-nested through said first slot and said second slot to achieve dual polarization.
3. The ultra-wideband dual polarized phased array antenna of claim 2, wherein said tightly coupled pole sub-antenna elements comprise: the second metal patch, third metal patch and the fourth metal patch that set up side by side, the second metal patch with the feed point department of third metal patch adopts the trapezium structure to widen the antenna bandwidth.
4. The ultra-wideband dual-polarized phased array antenna of claim 3, wherein said double layer dielectric slab comprises: the dielectric plate comprises an upper dielectric plate, a lower dielectric plate and a prepreg, wherein the upper dielectric plate and the lower dielectric plate are bonded through the prepreg.
5. The ultra-wideband dual polarized phased array antenna of claim 4, wherein said Marchand wideband balun comprises:
the inner conductor is used for realizing ultra-wideband impedance matching;
two fifth metal patches etched on the outer sides of the upper dielectric plate and the lower dielectric plate, respectively;
the square grooves are etched on the fifth metal patch at intervals, and the two arms of the balun are connected to the tightly-coupled pole antenna unit through the two metalized through holes;
the two balun arms are connected with the tightly coupled pole antenna unit through the first metalized through hole.
6. The ultra-wideband dual-polarized phased array antenna according to claim 5, wherein a plurality of the square grooves are symmetrically arranged on both sides of the double-layer dielectric plate, and a plurality of the square grooves all adopt a gradual change structure to realize wideband impedance matching.
7. The ultra-wideband dual-polarized phased array antenna according to claim 5, wherein there are two first metal patches, two first metal patches are symmetrically etched on the upper surface of the upper dielectric plate and the lower surface of the lower dielectric plate, and the two first metal patches cover the upper and lower sides of the tightly-coupled dipole antenna unit respectively for enhancing the coupling effect.
8. The ultra-wideband dual polarized phased array antenna of claim 1, further comprising on said first antenna element and said second antenna element: and the frequency selective surface broadband matching layer is arranged on the double-layer dielectric plate, and the frequency selective surface broadband matching layer and the tightly-coupled pole antenna unit are positioned on the same layer so as to realize the broadband matching of the free space of the antenna radiation band.
9. The ultra-wideband dual polarized phased array antenna of claim 8, wherein said inner conductor has a multi-section impedance taper at its lower end and a single section trapezoidal taper at its upper end for ultra-wideband impedance matching.
10. The ultra-wideband dual-polarized phased array antenna of claim 9, further comprising on each of said first antenna element and said second antenna element: a transition structure of microstrip line to coplanar waveguide and an SSMP connector,
the transition structure for converting the microstrip line into the coplanar waveguide comprises:
a second metallized via;
a third metallized via for suppressing electromagnetic leakage;
a coplanar waveguide transmission line transitioning down onto the inner conductor through the second metallized via,
the transition structure for converting the microstrip line into the coplanar waveguide is used for realizing high-efficiency radiation of the antenna, and the SSMP connector is connected with the central conduction band structure of the coplanar waveguide transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310009563.6A CN115863978A (en) | 2023-01-04 | 2023-01-04 | Ultra-wideband dual-polarized phased array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310009563.6A CN115863978A (en) | 2023-01-04 | 2023-01-04 | Ultra-wideband dual-polarized phased array antenna |
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| Publication Number | Publication Date |
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| CN115863978A true CN115863978A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310009563.6A Pending CN115863978A (en) | 2023-01-04 | 2023-01-04 | Ultra-wideband dual-polarized phased array antenna |
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| CN (1) | CN115863978A (en) |
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- 2023-01-04 CN CN202310009563.6A patent/CN115863978A/en active Pending
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