CN112134013B - Broadband dual-polarization phased array antenna based on medium integration cavity - Google Patents
Broadband dual-polarization phased array antenna based on medium integration cavity Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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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Abstract
The invention discloses a broadband dual-polarized phased array antenna based on a dielectric integrated cavity, relates to the technical field of wireless communication and radar, and particularly relates to the field of phased array antennas used for grid-shaped cavities in a communication system. The antenna layout is simple and compact, and the grid-shaped cavity layout ensures that the phased array antenna has high consistency of two polarizations, excellent radiation performance and good port isolation; the feed structure is simple, thereby avoiding a complex feed network. The structure of the medium integration cavity further reduces the weight of the antenna, enables the radiation aperture of the whole antenna to be manufactured by using a PCB process, is easy to process and assemble, and is convenient to be directly integrated with the radio frequency front end.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to the technical field of radar, and particularly relates to the field of a phased array antenna of a grid-shaped cavity in a communication system.
Background
In the past decades, broadband dual-polarized phased array antennas have been gaining importance in the military and commercial fields, and are widely applied to systems such as multifunctional radars, meteorological monitoring and aviation control, and the like, and the rapid development of broadband dual-polarized phased array antennas is promoted by the demand of military carrier platforms for high-performance multifunctional (monitoring, identifying and tracking targets) radar systems. In the context of this application, broadband, dual polarization, low profile and light weight are the main design criteria for antennas. The antenna with broadband characteristics is beneficial to the radar system to realize multi-task and multi-target cooperative work; the dual polarization characteristic is beneficial to realizing polarization multiplexing and polarization agility, and the anti-interference capability and the sensitivity of the system are improved. Therefore, it is very beneficial to realize broadband and dual polarization under the aperture of a single antenna array. In a traditional broadband dual-polarized phased array antenna design method, firstly, in order to avoid grating lobes in a scanning airspace, the size of an antenna unit must meet a non-grating lobe condition, and the design difficulty of broadband and dual-polarized layout is increased due to the limitation of the size of the antenna unit. Secondly, because a single dual-polarized phased array element is provided with two orthogonally arranged polarized ports, the two polarized ports need to realize independent work and avoid mutual interference as much as possible, and therefore, the improvement of the polarization isolation degree is also an important problem to be considered in the design of the dual-polarized phased array antenna. Finally, in the case that the small array element size satisfies the grating lobe-free condition, the mutual coupling between the array elements is very strong, which seriously affects the array element scanning performance. Even if the antenna array units have good broadband impedance matching under a side-firing angle, under the condition of large-angle scanning, the array elements often have serious impedance mismatching due to the change of the mutual coupling form among the array elements, and how to inhibit the mutual coupling among the array elements is one of the main challenges in the design process of the traditional phased array antenna.
In recent years, a new idea of implementing a wideband phased array antenna by using coupling between antenna elements has attracted extensive attention and intensive research of researchers related to the international antenna field. The theoretical basis for this idea is the continuous Current surface theory proposed by Wheeler professor in 1965, which was explained in detail in the article entitled "Simple relationships from a phase-Array Antenna Made of an Infinite Current Sheet" in the IEEE Transactions on Antennas and Propagation journal.
In 2003, professor b. Munk at state university in ohio first proposed a new Wideband Phased Array using coupling between Antenna Array elements in united states patent No. 6512487 patent "Wideband Phased Array and related technology" (Wideband Phased Array Antenna and Associated Methods). The dipole antenna is characterized in that coupling capacitors are added among dipole units, continuous current is formed by utilizing the strong mutual coupling effect among the units, and the limitation of the mutual coupling effect on the bandwidth and the scanning angle of the antenna is overcome. In practical application, the feed network of the dual-polarized strong-coupling dipole phased-array antenna needs to be designed elaborately so as to avoid cross-polarization radiation and polarization isolation reduction brought by the feed network. In addition, in order to avoid common mode resonance caused by unbalanced dipole feeding, a short-circuit probe or other complicated suppression measures are generally required. Therefore, the feed network structure of the dual-polarized strongly coupled dipole array is complex, and the size, the section and the cost of the whole antenna system are increased.
In chinese patent CN201610945580.0, "a phased array antenna based on a connection cavity", a wideband phased array antenna based on a continuous current plane theory is proposed, which uses a microstrip feed line to excite the connection cavity to form continuous equivalent magnetic current radiation, thereby effectively increasing the working bandwidth of the antenna. However, the antenna needs to be provided with an elongated slot on a metal floor to form a connecting cavity, and the radiation aperture of the antenna cannot be completely manufactured by using a PCB (printed circuit board) process, so that the antenna is inconvenient to be directly integrated with a radio frequency front end.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a dual-polarized phased array antenna which avoids the design of a complex feed network, has the advantages that the radiation aperture can be completely manufactured by using a PCB (printed Circuit Board) process, the integration is easy, the processing and the assembly are convenient, and the dual-polarized phased array antenna has the characteristics of wide band, low section, high polarization isolation, low cross polarization ratio and excellent scanning performance.
In order to achieve the purpose, the invention adopts the following technical scheme: a broadband dual-polarization phased-array antenna based on a dielectric integrated cavity body comprises the following components in sequence from bottom to top: a lower dielectric substrate 101, an intermediate dielectric substrate 102, and an upper dielectric substrate 103;
a plurality of metal patches 109 are arranged on the upper surface array of the lower dielectric substrate 101 at intervals, a circle of metalized through holes 110 are arranged around the inner edge of each metal patch 109, the upper ends of the metalized through holes 110 are flush with the upper surface of the lower dielectric substrate 101, and the lower ends of the metalized through holes 110 are flush with the lower surface of the lower dielectric substrate 101; the metal patch 109 is internally provided with two coaxial connector inner cores 108: the upper end of the inner core 108 of the coaxial connector is flush with the upper surface of the middle-layer medium substrate 102, the lower end of the inner core 108 of the coaxial connector extends out of the lower-layer medium substrate 101 and is connected with external equipment of the broadband dual-polarized phased-array antenna, and the inner core 108 of the coaxial connector is not in contact with the metal patch 109;
the upper surface of the middle layer medium substrate 102 is provided with a plurality of strip-shaped vertical polarization microstrip feeder lines 106 and strip-shaped horizontal polarization microstrip feeder lines 105; one end of each vertical polarization microstrip feeder line 106 is correspondingly connected with the upper end of a vertical polarization coaxial connector inner core, and the other end of each vertical polarization microstrip feeder line 106 extends to the corresponding upper part of the adjacent metal patch 109 along the vertical direction; one end of each horizontal polarization microstrip feeder line 105 is correspondingly connected with the upper end of one horizontal polarization coaxial connector inner core, and the other end of each horizontal polarization microstrip feeder line 105 extends to the corresponding upper part of the adjacent metal patch 109 along the horizontal direction;
the upper surface of the upper-layer dielectric substrate 103 is provided with a meshed metal patch 107, the meshed metal patch 107 comprises a plurality of columns of patches in the vertical direction and a plurality of rows of patches in the horizontal direction, each column or each row of patches comprises a plurality of groups of metal strips, each group of metal strips is not in contact with each other, and each group of metal strips comprises three parallel identical metal strips; two ends of each group of three metal strips are respectively positioned above two adjacent metal patches 109, and a group of metal strips is arranged above all adjacent metal patches 109;
a dielectric integrated cavity 104 is formed between the metallized through holes 110 of the adjacent metal patches 109 of the lower dielectric substrate 101, a cross-shaped dielectric integrated cavity 104 is formed between the adjacent four metal patches 109, and a three-layer structure corresponding to the cross-shaped dielectric integrated cavity 104 forms a basic antenna unit.
Further, the height of the metalized via hole 110 is 0.02-0.2 lambdalow，λlowThe wavelength of the free space at the low frequency end, the gap width of the adjacent metal patches 109 is 0.02-0.2 lambdalow(ii) a A dielectric integration cavity 104 is formed between the metalized via holes 110 of the adjacent metal patches 109 of the lower dielectric substrate 101, and the direction between the adjacent metal patches 109 is the width direction of the dielectric integration cavity 104; the distance between the axis of the coaxial joint inner core 108 and the central line of the dielectric integration cavity 104 in the width direction is 0.02-0.2 lambdalow(ii) a The length of the horizontal polarization microstrip feed line 105 and the vertical polarization microstrip feed line 106 is 0.05-0.4 lambdalow(ii) a The upper dielectric substrate 103 has a relative dielectric constant of 1-3.5 and a thickness of 0.01-0.1 lambdalow(ii) a The upper dielectric substrate 103 is directly covered on the middle dielectric substrate 102 or is arranged at a distance less than 0.1 lambda from the upper surface of the middle dielectric substrate 102lowA position of height; the length of a single metal strip is 0.1-0.4 lambdalowAnd a width of 0.005 to 0.1 lambdalow。
Furthermore, the vertical polarization microstrip feeder line 106 and the horizontal polarization microstrip feeder line 105 have the same shape, are strip patches with two wide ends and a narrow middle, and the width of the feed end is narrower than that of the coupling end, wherein the feed end is the end of the microstrip feeder line connected with the coaxial connector inner core, and the coupling end is the end of the microstrip feeder line far away from the coaxial connector inner core.
Further, the metal patch 109 is square or square-like; the square-like structure is formed by dividing each side of a square into three sections protruding outwards, and the included angle between each section is larger than 160 degrees and smaller than 180 degrees.
Furthermore, the broadband dual-polarized phased array antenna is flat or planar arc.
The invention has the beneficial effects that: the antenna layout is simple and compact, and the grid-shaped cavity layout ensures that the phased array antenna has high consistency of two polarizations, excellent radiation performance and good port isolation; the feed structure is simple, thereby avoiding a complex feed network. The structure of the medium integration cavity further reduces the weight of the antenna, enables the radiation aperture of the whole antenna to be manufactured by using a PCB process, is easy to process and assemble, and is convenient to be directly integrated with the radio frequency front end.
Drawings
Fig. 1 is an exploded schematic view of a planar broadband dual-polarized phased array antenna based on a dielectric integrated cavity in embodiment 1.
Fig. 2 is a multi-view of a basic antenna unit, wherein (a) is a schematic top surface of an upper dielectric substrate, (b) is a side sectional view, (c) is a schematic top surface of a middle dielectric substrate, and (d) is a schematic top surface of a lower dielectric substrate.
Fig. 3 is a schematic structural diagram of the wideband dual-polarized phased array antenna of the present invention in the form of a planar arc, where (a) is a three-dimensional diagram of the planar arc array, (b) is a top view of the planar arc array, and (c) is a front view of the planar arc array.
Fig. 4 is a schematic view of a metal patch on the upper surface of the lower dielectric substrate in a square shape.
Fig. 5 is a schematic view of a metal patch on the upper surface of the lower dielectric substrate being square-like.
Fig. 6 is a graph showing the simulation result of the active voltage standing wave ratio in embodiment 1 of the present invention.
Fig. 7 is a diagram of a port isolation simulation result in embodiment 1 of the present invention.
Fig. 8 is a graph showing simulation results of the active voltage standing wave ratio in embodiment 2 of the present invention.
Fig. 9 is a graph showing simulation results of the active voltage standing wave ratio in embodiment 3 of the present invention.
Detailed Description
Example 1
The broadband dual-polarized phased-array antenna panel array form based on the dielectric integrated cavity in the embodiment is divided into three layers as shown in fig. 1, and includes a lower dielectric substrate 101 with a grid-shaped dielectric integrated cavity 104, a middle dielectric substrate 102 printed with a horizontal polarized microstrip feeder 105 and a vertical polarized microstrip feeder 106, and an upper dielectric substrate 103 printed with a mesh-shaped metal patch 107; the thickness of the lower dielectric substrate 101 is 3mm, the relative dielectric constant is 3, and a grid-shaped dielectric integration cavity 104 with the depth of 3mm and the width of 5mm is formed in the dielectric substrate by utilizing the metal patches 109 and the metalized via holes 110 which are periodically arranged; the relative dielectric constant of the middle layer dielectric substrate 102 is 2.2, the thickness is 0.25mm, and a horizontal polarization microstrip feeder line 105 and a vertical polarization microstrip feeder line 106 are printed on the upper surface of the middle layer dielectric substrate; the upper-layer dielectric substrate 103 has a relative dielectric constant of 2.2 and a thickness of 2.5mm, and the upper surface is printed with a reticular metal patch 107; the two coaxial connector inner cores 108 penetrate through the lower layer dielectric substrate 101 and the middle layer dielectric substrate 102 to be respectively and correspondingly connected with the horizontal polarization microstrip feeder line 105 and the vertical polarization microstrip feeder line 106 and feed; the distance between the middle points of the adjacent metal patches 109 is 12.5 mm; the size of each metal strip in the reticular metal patch is 7mm multiplied by 0.7 mm, and the distance between the metal strips in the same direction is 2 mm; the working frequency band of the array is 7.5-12.5 GHz, the height of the array is 0.24 times of the free space wavelength of high frequency 12.5 GHz, and the array has the characteristic of low section.
Fig. 2 is a schematic diagram of a basic antenna unit obtained by dividing the wideband dual-polarized phased-array antenna according to the present invention into units, so as to facilitate observation of the positional relationship between elements in each layer. Fig. (a) is a schematic top surface view of the upper dielectric substrate 103 of the basic antenna unit, fig. (b) is a side cross-sectional view of the basic antenna unit, fig. (c) is a schematic top surface view of the middle dielectric substrate 102 of the basic antenna unit, and fig. (d) is a schematic top surface view of the lower dielectric substrate 101 of the basic antenna unit; the metal strip can be seen to be directly above the dielectric integration cavity 104; the horizontally polarized microstrip feed line 105 and the vertically polarized microstrip feed line 106 cross adjacent two metal patches 109.
Fig. 3 is a schematic structural diagram of the wideband dual-polarized phased array antenna of the present invention in the form of a flat arc. Fig. a is a three-dimensional view of the flat arc array, fig. b is a top view of the flat arc array, and fig. c is a front view of the flat arc array.
Fig. 4 is a schematic view of a metal patch on the upper surface of the lower dielectric substrate in a square shape.
Fig. 5 is a schematic view of a metal patch on the upper surface of the lower dielectric substrate being square-like. The square-like structure is formed by dividing each side of a square into three sections protruding outwards, and the included angle between each section is larger than 160 degrees and smaller than 180 degrees.
Fig. 6 shows simulation results of the active voltage standing wave ratio of the horizontally polarized port with frequency variation under different scan angles of the array unit in embodiment 1. It can be seen that within the scanning range of +/-60 degrees, the impedance bandwidth of the active voltage standing wave ratio less than 2 is more than 50%, and due to the symmetry of the array unit structure, the scanning performance simulation results of the unit two polarizations have good consistency.
Fig. 7 shows simulation results of port isolation with frequency variation under different scan angles of the array unit in embodiment 1. It can be seen that the isolation of two orthogonally polarized ports within an array cell is less than-20 dB over a ± 60 ° scan range. As can be seen from the simulation results, the array elements in this embodiment implement broadband and dual-polarization characteristics of the phased array antenna.
Example 2
The wideband dual-polarized phased-array antenna panel array form based on the dielectric integrated cavity in the embodiment is divided into three layers as shown in fig. 1, and includes a lower dielectric substrate 101 with a grid-shaped dielectric integrated cavity 104, a middle dielectric substrate 102 printed with a horizontal polarized microstrip feeder 105 and a vertical polarized microstrip feeder 106, and an upper dielectric substrate 103 printed with a mesh-shaped metal patch 107; the thickness of the lower dielectric substrate 101 is 3.5mm, the relative dielectric constant is 2.2, and a grid-shaped dielectric integration cavity 104 with the depth of 3.5mm and the width gradually changed from 4mm to 5mm is formed in the dielectric substrate by utilizing the metal patches 109 and the metalized via holes 110 which are periodically arranged; the relative dielectric constant of the middle layer dielectric substrate 102 is 2.2, the thickness is 0.127mm, and a horizontal polarization microstrip feeder line 105 and a vertical polarization microstrip feeder line 106 are printed on the upper surface of the middle layer dielectric substrate; the upper-layer dielectric substrate 103 has a relative dielectric constant of 2.2 and a thickness of 2.5mm, and the upper surface is printed with a reticular metal patch 107; the two coaxial connector inner cores 108 penetrate through the lower layer dielectric substrate 101 and the middle layer dielectric substrate 102 to be respectively and correspondingly connected with the horizontal polarization microstrip feeder line 105 and the vertical polarization microstrip feeder line 106 and feed; the metal patch 109 is square-like, each side of the square is divided into three sections protruding outwards, and the included angle between each section is 160 degrees; the distance between the middle points of the adjacent metal patches 109 is 12.5 mm; the size of each metal strip in the reticular metal patch is 7.5mm multiplied by 0.6 mm, and the distance between the metal strips in the same direction is 2 mm; the working frequency band of the array is 7.2-12.7 GHz, the height of the array is 0.26 times of the free space wavelength of high frequency 12.7GHz, and the array has the characteristic of low profile.
Fig. 8 shows simulation results of the horizontal polarization port active voltage standing wave ratio with frequency variation under different scanning angles of the array unit in embodiment 2. It can be seen that the impedance bandwidth with an active voltage standing wave ratio of less than 2 is greater than 55% over a ± 60 ° scan range. The metal patches 109 in this embodiment are square-like, the periodically arranged metal patches 109 and the metalized via holes 110 form a grid-type dielectric integrated cavity 104 with gradually changing width, and the array unit realizes better impedance matching bandwidth than that in embodiment 1.
Example 3
The broadband dual-polarized phased array antenna based on the dielectric integrated cavity is in a planar arc array form; as shown in fig. 3, the three-layer structure comprises a lower layer dielectric substrate 101 with a grid-shaped dielectric integrated cavity 104, a middle layer dielectric substrate 102 printed with a horizontal polarization microstrip feeder 105 and a vertical polarization microstrip feeder 106, and an upper layer dielectric substrate 103 printed with a net-shaped metal patch 107; the thickness of the lower dielectric substrate 101 is 3mm, the relative dielectric constant is 3, and a grid-shaped dielectric integration cavity 104 with the depth of 3mm and the width of 4.8mm is formed in the dielectric substrate by utilizing the metal patches 109 and the metalized via holes 110 which are periodically arranged; the relative dielectric constant of the middle layer dielectric substrate 102 is 2.2, the thickness is 0.25mm, and a horizontal polarization microstrip feeder line 105 and a vertical polarization microstrip feeder line 106 are printed on the upper surface of the middle layer dielectric substrate; the upper-layer dielectric substrate 103 has a relative dielectric constant of 2.2 and a thickness of 3mm, and the upper surface is printed with a reticular metal patch 107; the two coaxial connector inner cores 108 penetrate through the lower layer dielectric substrate 101 and the middle layer dielectric substrate 102 to be respectively and correspondingly connected with the horizontal polarization microstrip feeder line 105 and the vertical polarization microstrip feeder line 106 and feed; the plane arc array is of a semicircular ring in the whole structure, the diameter of the inner circle of the semicircular ring is 100mm, and the diameter of the outer circle of the semicircular ring is 111.5 mm; the working frequency band of the array is 7.6-12.6 GHz, the thickness of the array section is 0.24 times of the free space wavelength of high frequency 12.6GHz, and the array has the characteristic of low section.
Fig. 9 shows simulation results of the horizontal polarization port active voltage standing wave ratio with frequency variation under different scanning angles of the planar arc array unit in embodiment 3. It can be seen that the impedance bandwidth with an active voltage standing wave ratio of less than 2 is greater than 50% over a ± 60 ° scan range. As can be seen from the simulation results, the array unit in this embodiment can still achieve the broadband and wide-angle scanning characteristics of the phased array antenna under the conformal condition.
Claims (5)
1. A broadband dual-polarization phased-array antenna based on a dielectric integrated cavity body comprises the following components in sequence from bottom to top: a lower dielectric substrate (101), an intermediate dielectric substrate (102), and an upper dielectric substrate (103);
the metal-clad plate is characterized in that a plurality of metal patches (109) are arranged on the upper surface of the lower-layer dielectric substrate (101) at intervals, a circle of metalized through holes (110) are formed around the inner edge of each metal patch (109), the upper ends of the metalized through holes (110) are flush with the upper surface of the lower-layer dielectric substrate (101), and the lower ends of the metalized through holes are flush with the lower surface of the lower-layer dielectric substrate (101); two coaxial connector inner cores (108) are arranged in the metal patch (109): the upper end of the inner core (108) of the coaxial connector is flush with the upper surface of the middle-layer medium substrate (102), the lower end of the inner core (108) of the coaxial connector extends out of the lower-layer medium substrate (101) and is connected with external equipment of the broadband dual-polarized phased-array antenna, and the inner core (108) of the coaxial connector is not in contact with the metal patch (109);
the upper surface of the middle layer medium substrate (102) is provided with a plurality of strip-shaped vertical polarization microstrip feeder lines (106) and strip-shaped horizontal polarization microstrip feeder lines (105); one end of each vertical polarization microstrip feeder line (106) is correspondingly connected with the upper end of a vertical polarization coaxial connector inner core, and the other end of each vertical polarization microstrip feeder line (106) extends to the corresponding upper part of the adjacent metal patch (109) along the vertical direction; one end of each horizontal polarization microstrip feeder line (105) is correspondingly connected with the upper end of one horizontal polarization coaxial joint inner core, and the other end of each horizontal polarization microstrip feeder line (105) extends to the corresponding upper part of the adjacent metal patch (109) along the horizontal direction;
the upper surface of the upper-layer dielectric substrate (103) is provided with a reticular metal patch (107), the reticular metal patch (107) comprises a plurality of columns of patches in the vertical direction and a plurality of rows of patches in the horizontal direction, each column or each row of patches comprises a plurality of groups of metal strips, each group of metal strips are not in contact with each other, and each group of metal strips comprises three parallel identical metal strips; two ends of each group of three metal strips are respectively positioned above two adjacent metal patches (109), and a group of metal strips is arranged above all adjacent metal patches (109);
a dielectric integrated cavity (104) is formed between the metalized through holes (110) of the adjacent metal patches (109) of the lower dielectric substrate (101), a cross-shaped dielectric integrated cavity (104) is formed between the four adjacent metal patches (109), and a three-layer structure corresponding to the cross-shaped dielectric integrated cavity (104) forms a basic antenna unit.
2. As claimed in claimThe broadband dual-polarization phased array antenna based on the dielectric integrated cavity is characterized in that the height of the metalized via hole (110) is 0.02-0.2 lambdalow，λlowThe wavelength of the free space at the low frequency end is 0.02-0.2 lambda of the gap width of the adjacent metal patches (109)low(ii) a A dielectric integration cavity (104) is formed between the metalized via holes (110) of the adjacent metal patches (109) of the lower dielectric substrate (101), and the direction between the adjacent metal patches (109) is the width direction of the dielectric integration cavity (104); the distance between the axial line of the coaxial joint inner core (108) and the central line of the dielectric integration cavity (104) in the width direction is 0.02-0.2 lambdalow(ii) a The length of the horizontal polarization microstrip feed line (105) and the vertical polarization microstrip feed line (106) is 0.05-0.4 lambdalow(ii) a The upper dielectric substrate (103) has a relative dielectric constant of 1-3.5 and a thickness of 0.01-0.1 lambdalow(ii) a The upper medium substrate (103) is directly covered on the middle medium substrate (102) or is arranged at a distance less than 0.1 lambda from the upper surface of the middle medium substrate (102)lowA position of height; the length of a single metal strip is 0.1-0.4 lambdalowAnd a width of 0.005 to 0.1 lambdalow。
3. The broadband dual-polarized phased array antenna based on the dielectric integrated cavity as claimed in claim 1, wherein the vertically polarized microstrip feed line (106) and the horizontally polarized microstrip feed line (105) have the same shape, and are strip patches with two wide ends and a narrow middle, and the width of the feed end is narrower than that of the coupling end, wherein the feed end is the end of the microstrip feed line connected with the inner core of the coaxial connector, and the coupling end is the end of the microstrip feed line away from the inner core of the coaxial connector.
4. The broadband dual-polarized phased array antenna based on the dielectric integrated cavity as claimed in claim 1, wherein the metal patch (109) is square or square-like; the square-like structure is formed by dividing each side of a square into three sections protruding outwards, and the included angle between each section is larger than 160 degrees and smaller than 180 degrees.
5. The wideband dual-polarized phased array antenna based on a dielectric integrated cavity as claimed in claim 1, wherein said wideband dual-polarized phased array antenna is in a shape of a flat plate or a planar arc.
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| CN106340727B (en) * | 2016-11-02 | 2019-02-15 | 电子科技大学 | A kind of phased array antenna based on connection cavity |
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