Structure multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna

Abstract

The invention provides a structure multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased-array antenna, and belongs to the technical field of antenna engineering. The antenna is formed by one-dimensional periodic arrangement of a plurality of antenna units. The antenna unit comprises a bottom structure, and two horizontal polarized antennas and a vertical polarized antenna which are vertically arranged above the bottom structure; wherein the bottom structure is used for feeding the horizontal polarized antenna and the vertical polarized antenna; the horizontally-polarized antennas are arranged on the two sides of the vertically-polarized antenna in a mirror symmetry mode, the horizontally-polarized antennas and the vertically-polarized antenna are arranged in an orthogonal mode, and the horizontally-polarized antennas are achieved through slot radiators to serve as ideal conductor boundaries of the vertically-polarized antenna. According to the invention, based on the idea of structure multiplexing, the slot antenna is multiplexed as an ideal electric conductor to recover the equivalent boundary condition of an infinite area array, so that the bandwidth expansion is realized; meanwhile, the fishbone-shaped slot antenna and the folding dipole are designed, so that the dual-polarization bandwidth of the antenna is further improved, and the profile height of the array is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of antenna engineering, and in particular is a structural multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna. Background Art

[0002] On some narrow and long application platforms, such as wing platforms, on the one hand, the space can only accommodate a one-dimensional phased array, and the corresponding antenna is a one-dimensional phased array antenna. On the other hand, in order to integrate more functions in a limited space, the working bandwidth of the phased array antenna is required to be broadband. Compared with planar ultra-wideband antennas, ultra-wideband linear arrays have a strong truncation effect, and their broadband design is more challenging.

[0003] For example, the literature "H. Zhang, S. Yang, Y. Chen, J. Guo and Z. Nie, "Wideband Dual-Polarized Linear Array of Tightly Coupled Elements", IEEE Trans. Ant. Propaga., vol. 66, no. 1, pp. 476-480, Jan. 2018", and the literature "Li Zhou, Shiwen Yang, Zhiwei Guo and Yikai Chen, "Aeband dual-polarized dipole linear array with resistive loading", 2016 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), Chengdu, 2016", these two papers adopt the method of placing double rows of dipoles side by side, by extending the length of the dipoles, and loading branches at the end of the dipoles to weaken the end current reflection. The bandwidth expansion of the ultra-wideband linear array is achieved, and the bandwidth of the ultra-wideband linear array is expanded to 5:1 and 5.7:1 respectively. However, the unit size of the above-mentioned ultra-wideband linear array is relatively large, and due to the use of materials such as resistors, the radiation efficiency is low.

[0004] For example, the literature H.Lee and S.Nam, "A Dual-Polarized 1-D Tightly Coupled DipoleArray Antenna", IEEE Trans.Ant.Propaga., vol.65, no.9, pp.4511-4518, Sept.2017", and the literature S.Kim and S.Nam, "Bandwidth Extension of Dual-Polarized 1-D TCDA Antenna Using VMS", IEEE Trans.Ant.Propaga., vol.67, no.8, pp.5305-5312, Aug.2019", these two literatures use the ferrite loading method to realize the design of ultra-wideband linear array. Compared with the ultra-wideband area array, the ultra-wideband linear array lacks the ideal magnetic conductor boundary conditions and the ideal electric conductor boundary conditions, resulting in a narrow bandwidth. The above two literatures realize the boundary condition compensation of the ultra-wideband linear array by designing conductive metal grids and ferrites. The ultra-wideband linear array proposed in the literature has an operating bandwidth of 3.1:1 frequency ratio, and has the advantages of small unit size and low profile height. However, due to the use of high-loss material ferrite, the radiation efficiency of the ultra-wideband linear array is low. Summary of the invention

[0005] In view of the problem that the existing ultra-wideband one-dimensional phased array antenna is difficult to achieve low profile, high efficiency and dual polarization at the same time, the present invention proposes a structural reuse ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna. Based on the principle of tight coupling and combined with the idea of ​​structural reuse, the present invention designs a new type of dual-polarization one-dimensional phased array antenna to eliminate the truncation effect of the one-dimensional array. The designed antenna achieves a 5-fold dual-polarization bandwidth, the profile height is only 0.11 times the low-frequency wavelength, and the radiation efficiency is above 60%.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A structural multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna, characterized in that the phased array antenna is composed of a plurality of antenna units arranged in a one-dimensional periodic manner;

[0008] The antenna unit includes a horizontally polarized antenna, a vertically polarized antenna, and a bottom structure, and the horizontally polarized antenna and the vertically polarized antenna are vertically placed above the bottom structure;

[0009] The horizontal polarization antenna is implemented by a slot radiator, and includes a first horizontal polarization antenna and a second horizontal polarization antenna; the two horizontal polarization antennas serve as ideal conductor boundaries of the vertical polarization antenna, and are arranged on both sides of the vertical polarization antenna in a mirror-symmetrical manner and are placed orthogonally to the vertical polarization antenna;

[0010] The bottom structure is used to feed the horizontal polarization antenna and the vertical polarization antenna. Preferably, the horizontal polarization antenna comprises a horizontal polarization dielectric substrate;

[0011] The outer side surface of the horizontally polarized dielectric substrate is provided with a metal layer, and the inner side surface is provided with a microstrip feed line;

[0012] The lower end of the microstrip feed line is the feeding end of the horizontally polarized antenna;

[0013] A slot radiator is arranged on the metal layer as the radiation structure of the horizontal polarization antenna; and a group of slot structures are arranged in the corresponding area of ​​the microstrip feeder to optimize the impedance matching of the microstrip feeder.

[0014] Preferably, the slot radiator is an asymmetric bowtie-shaped slot, which is composed of a first bowtie-shaped slot arm arranged in the upper area and a second bowtie-shaped slot arm arranged in the lower area, wherein the length of the second bowtie-shaped slot arm is greater than the length of the first bowtie-shaped slot arm, and a plurality of rectangular slots are symmetrically arranged on both sides of the second bowtie-shaped slot arm to form a fishbone-shaped slot;

[0015] The microstrip feed line is a bent microstrip line, the tail end of which passes horizontally through the middle projection position of the two arms of the asymmetric bowtie-shaped slot to couple and feed the slot radiator, and the end opens to form a fan-shaped capacitor sheet for adjusting impedance matching.

[0016] Preferably, 2 to 5 rectangular slits are arranged on one side of the second bowtie-shaped slit arm, and the distance between adjacent rectangular slits is 1 to 12 mm.

[0017] Preferably, the slot structure located in the vertical section area of ​​the microstrip feeder line is a trapezoidal slot structure, and the width gradually increases from bottom to top; the slot structure located in the horizontal section area of ​​the microstrip feeder line is a rectangular slot structure with the same width.

[0018] Preferably, the vertically polarized antenna comprises a vertically polarized dielectric substrate;

[0019] The front side of the vertically polarized dielectric substrate is provided with a gradient microstrip line, and the back side is provided with a gradient microstrip line ground and a dipole radiator;

[0020] The dipole radiator is composed of two folded dipole arms arranged in mirror symmetry, the width of the folded dipole arms gradually increases from the starting end to the end, and the end is bent downward;

[0021] The upper end of the gradient microstrip line ground is connected to the starting end of a folded dipole arm; the lower end of the gradient microstrip line is the feeding end of the vertical polarization antenna, and the upper end is connected to the starting end of another folded dipole arm through a metal via; the gradient microstrip line and the gradient microstrip line ground together constitute an exponentially gradient feeding balun, which serves as a feeding structure for the dipole radiator.

[0022] Preferably, the bottom structure includes a bottom dielectric substrate, an aluminum plate arranged on the back of the bottom dielectric substrate, a horizontally polarized SMA connector, a vertically polarized SMA connector, a power divider arranged on the front of the bottom dielectric substrate, and a bent gradient microstrip line;

[0023] The aluminum plate is used to support and fix the antenna unit;

[0024] The horizontally polarized SMA connector is connected to the input end of the power divider, and the two output ends of the power divider are respectively connected to the microstrip feed lines of the first horizontally polarized antenna and the second horizontally polarized antenna;

[0025] The vertically polarized SMA connector is connected to the input end of the meandering tapered microstrip line, and the output end of the meandering tapered microstrip line is connected to the tapered microstrip line of the vertically polarized antenna.

[0026] Preferably, in the vertically polarized antenna, rectangular blocks are dug on both sides of the feeding structure so that the vertically polarized dielectric substrate forms a T-shaped structure, which is convenient for inserting the bottom dielectric substrate into the bottom side for installation and fixation.

[0027] Preferably, three rectangular grooves are further provided on the bottom dielectric substrate and the aluminum plate, and the bottoms of the two horizontally polarized dielectric substrates and the vertically polarized dielectric substrate are respectively inserted into the corresponding rectangular grooves for installation and fixation.

[0028] The working principle of the present invention is as follows:

[0029] First, the dipole unit of the traditional two-dimensional array tightly coupled array can be equivalent to being placed in an imaginary waveguide composed of an ideal electric conductor and an ideal magnetic conductor, while the one-dimensional array is different from the two-dimensional array because of the missing array elements, that is, the ideal conductor boundary is lost in one dimension. The present invention modifies the dual-polarized dipole radiator in the traditional tightly coupled array into a dipole radiator and a slot radiator, and places the slot radiator on both sides of the dipole radiator. The slot radiator can be equivalent to an ideal electric conductor due to the large area of ​​the metal part, and the equivalent boundary conditions of the array are restored, so the bandwidth of the one-dimensional array can be greatly expanded.

[0030] Secondly, the present invention designs a microstrip gradient feeding balun and a microstrip line to slot line feeding balun for the horizontally polarized slot radiator and the vertically polarized dipole radiator, respectively, completing the broadband impedance transformation from the antenna port impedance to the 50 ohm impedance of the SMA connector, and achieving good impedance matching.

[0031] Finally, a number of rectangular slots are arranged on both sides of the lower half of the asymmetric bowtie-shaped slot radiator, so it presents a fishbone shape; an important factor restricting the low-frequency bandwidth of the fishbone-shaped slot radiator is the low-frequency current loop resonance. By adjusting the number and length of the rectangular slots, the resonant frequency of the low-frequency current loop can be changed, and the loop resonance can be moved out of the working frequency band to achieve broadband impedance matching.

[0032] In summary, the beneficial effects of the present invention are:

[0033] 1. The present invention proposes a new ultra-wideband dual-polarization one-dimensional array structure. By combining a dipole radiator with a slot radiator, the slot radiator is reused as an ideal conductor wall, the equivalent boundary conditions of the two-dimensional array are reconstructed, the truncation effect of the one-dimensional array is overcome, and the bandwidth expansion of the ultra-wideband dual-polarization one-dimensional array is achieved.

[0034] 2. The present invention designs a fishbone-type slot radiator, which achieves bandwidth expansion compared to ordinary slot radiators; at the same time, the designed folded dipole structure improves the impedance matching within the band compared to ordinary dipoles. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a 1×8 array of ultra-wideband dual-polarization one-dimensional array antenna of the present invention;

[0036] Figure 2 It is an overall 3D schematic diagram of the ultra-wideband dual-polarization one-dimensional array antenna unit of the present invention;

[0037] Figure 3 It is a schematic structural diagram of a horizontal polarization unit of an ultra-wideband dual-polarization one-dimensional array antenna of the present invention;

[0038] Figure 4 It is a schematic structural diagram of a vertical polarization unit of an ultra-wideband dual-polarization one-dimensional array antenna of the present invention;

[0039] Figure 5 It is a front view of the ultra-wideband dual-polarization one-dimensional array antenna unit of the present invention;

[0040] Figure 6 A dual-polarization unit scanning standing wave ratio simulation curve of a specific embodiment of the present invention;

[0041] Figure 7 It is a dual-polarization unit efficiency simulation curve of a specific embodiment of the present invention;

[0042] Explanation of the accompanying drawings: 1. horizontally polarized antenna, 11. horizontally polarized dielectric substrate, 12. metal layer, 121. first bowtie-shaped slot arm, 122. second bowtie-shaped slot arm, 123. rectangular slot, 124. slot structure, 131. microstrip feeder, 132. fan-shaped capacitor; 2. vertically polarized antenna, 21. vertically polarized dielectric substrate, 221. gradient microstrip line, 222. metal via, 231. gradient microstrip line ground, 232. folded dipole; 3. bottom structure, 31. bottom dielectric substrate, 32. aluminum plate, 33. power divider, 34. bent gradient microstrip line, 35. horizontally polarized SMA connector, 36. vertically polarized SMA connector. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings and examples.

[0044] Reference Figure 1 In this embodiment, a structure multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna is provided, and the entire array is composed of 8 antenna units arranged in a one-dimensional periodic manner.

[0045] Reference Figure 2 The antenna unit includes a horizontally polarized antenna, a vertically polarized antenna, and a bottom structure, and the horizontally polarized antenna and the vertically polarized antenna are vertically placed above the bottom structure.

[0046] The horizontal polarization antenna comprises a first horizontal polarization antenna and a second horizontal polarization antenna realized by a slot radiator; the two horizontal polarization antennas serve as ideal conductor boundaries of the vertical polarization antenna, are arranged on both sides of the vertical polarization antenna in a mirror-symmetrical manner, and are placed orthogonally to the vertical polarization antenna.

[0047] The bottom structure is used to feed the horizontal polarization antenna and the vertical polarization antenna.

[0048] Reference Figure 3 The horizontally polarized antenna in this embodiment includes a horizontally polarized dielectric substrate, the height of the horizontally polarized dielectric substrate is 82.3 mm, the length is 75 mm, the thickness is 1.024 mm, the dielectric constant is 3.66, and a rectangular part is extended from the bottom of the horizontally polarized dielectric substrate for inserting into the bottom structure for fixing.

[0049] The outer side surface of the horizontal polarization dielectric substrate is provided with a metal layer, and the inner side surface is provided with a bent microstrip feed line.

[0050] A slot radiator is arranged on the metal layer as the radiation structure of the horizontally polarized antenna; specifically, the slot radiator is an asymmetric bowtie-shaped slot, which is composed of a first bowtie-shaped slot arm arranged in the upper area and a second bowtie-shaped slot arm arranged in the lower area, wherein the length of the first bowtie-shaped slot arm is 25 mm and the width is 14 mm; the length of the second bowtie-shaped slot arm is 40 mm and the width is 13 mm; 8 rectangular slots are also symmetrically arranged on both sides of the second bowtie-shaped slot arm to form a herringbone-shaped slot, and the length of the rectangular slot is 10.5 mm, the width is 4.5 mm, and the spacing is 4.2 mm.

[0051] The meandering microstrip line consists of a vertical section and a transverse section, wherein the line width of the vertical section gradually changes from 0.8mm to 0.34mm from bottom to top, and the lower end is the feeding end of the horizontally polarized antenna; the line width of the transverse section of the meandering microstrip line is 0.34mm, and the transverse section passes through the middle projection position of the two arms of the asymmetric bow tie-shaped gap to couple and feed the gap radiator; at the same time, the end of the transverse section opens to form a fan-shaped capacitor sheet, the radius of the fan-shaped capacitor sheet is 5.3mm, and the angle of the fan-shaped opening is 140°, which is used to adjust the impedance matching.

[0052] A group of slot structures for optimizing the impedance matching of the microstrip feeder line are also provided in the metal layer portion corresponding to the bent microstrip feeder line, wherein the slot structure in the vertical section area is a trapezoidal slot structure, and the width gradually increases from bottom to top, with the slot width at the bottom being 0.9 mm and the slot width at the top being 3.6 mm; the slot structure in the transverse section area is a rectangular slot structure with the same width of 3.6 mm.

[0053] Reference Figure 4 The vertically polarized antenna comprises a T-shaped vertically polarized dielectric substrate having a thickness of 1.024 mm, a dielectric constant of 3.66, a total height of 80 mm, a lateral width of 30 mm and a length of 95 mm; the lower end of the T-shaped vertically polarized dielectric substrate is extended and inserted into the bottom structure for fixation.

[0054] The front side of the vertical polarization dielectric substrate is provided with a gradient microstrip line, and the back side is provided with a gradient microstrip line ground and a dipole radiator.

[0055] The dipole radiator is composed of two folded dipole arms arranged in mirror symmetry, the width of the folded dipole arm gradually increases from the starting end to the end, and the end is bent downward; specifically, the folded dipole arm is 2 mm wide at the feeding point, gradually changes to 12 mm on both sides, and then widens in steps to 17 mm, and finally the end is bent downward at a right angle, and the outer side of the bend is rounded.

[0056] The width of the gradient microstrip line ground gradually changes from 10mm to 0.4mm, and the upper end is connected to the starting end of the left folded dipole arm; the width of the gradient microstrip line gradually changes from 0.76mm to 0.4mm, the lower end is the feeding end of the vertically polarized antenna, and the upper end is connected to the starting end of the right folded dipole arm through a metal via; the gradient microstrip line and the gradient microstrip line ground together constitute an exponentially gradient feeding balun, which serves as the feeding structure of the dipole radiator.

[0057] Reference Figure 5 The bottom structure includes a bottom dielectric substrate, an aluminum plate arranged on the back of the bottom dielectric substrate, a horizontally polarized SMA connector, a vertically polarized SMA connector, a power divider arranged on the front of the bottom dielectric substrate, and a bent gradient microstrip line.

[0058] The size of the bottom dielectric substrate is 75mm×102mm, the thickness is 1.024mm, and the dielectric constant is 3.66; the thickness of the aluminum plate is 4mm; three rectangular grooves are arranged on the bottom dielectric substrate and the aluminum plate, and the bottoms of the two horizontally polarized dielectric substrates and the vertically polarized dielectric substrate are respectively inserted into the corresponding rectangular grooves and fixed.

[0059] The horizontally polarized SMA connector is connected to the input end of the power divider, and the two output ends of the power divider are respectively connected to the microstrip feed lines of the first horizontally polarized antenna and the second horizontally polarized antenna; the line width of the input end of the power divider is 2.2 mm, and the line width of the output end is 0.8 mm.

[0060] The vertically polarized SMA connector is connected to the input end of the meandering tapered microstrip line, and the output end of the meandering tapered microstrip line is connected to the tapered microstrip line of the vertically polarized antenna; the input end line width of the meandering tapered microstrip line is 2.2 mm, and the output end line width is 0.76 mm.

[0061] The active standing wave simulation results based on the above embodiment are as follows: Figure 6 As shown, HP refers to horizontal polarization and VP refers to vertical polarization. It can be seen from the figure that this embodiment has an operating bandwidth of 0.4 to 2 GHz (5:1), and the unit active standing waves of the horizontally polarized antenna and the vertically polarized antenna are both lower than 3.4 when scanning at 60° and 45° respectively, thereby achieving a large range of scanning.

[0062] The efficiency simulation results of the unit described in the above embodiment are as follows: Figure 7 As shown in the figure, it can be seen that the dual-polarization efficiency of this embodiment is higher than 64% in the 0.4-2 GHz frequency band.

[0063] The above is only a specific implementation example of the present invention, but the implementation example of the present invention is not limited to the above embodiment. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A structural multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna, characterized in that: The phased array antenna is composed of a plurality of antenna units arranged in a one-dimensional periodic manner; The antenna unit includes a horizontally polarized antenna, a vertically polarized antenna, and a bottom structure, and the horizontally polarized antenna and the vertically polarized antenna are vertically placed above the bottom structure; The horizontally polarized antenna includes a first horizontally polarized antenna and a second horizontally polarized antenna implemented by a slot radiator; the two horizontally polarized antennas serve as ideal conductor boundaries of the vertically polarized antenna, are arranged on both sides of the vertically polarized antenna in a mirror-symmetrical manner, and are placed orthogonally to the vertically polarized antenna; The bottom structure is used to feed the horizontal polarization antenna and the vertical polarization antenna.

2. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 1, characterized in that: The horizontally polarized antenna comprises a horizontally polarized dielectric substrate; The outer side surface of the horizontally polarized dielectric substrate is provided with a metal layer, and the inner side surface is provided with a microstrip feed line; The lower end of the microstrip feed line is the feeding end of the horizontally polarized antenna; A slot radiator is arranged on the metal layer as the radiation structure of the horizontal polarization antenna; and a group of slot structures are arranged in the corresponding area of ​​the microstrip feeder to optimize the impedance matching of the microstrip feeder.

3. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 2, characterized in that: The slot radiator is an asymmetric bowtie-shaped slot, which is composed of a first bowtie-shaped slot arm arranged in the upper area and a second bowtie-shaped slot arm arranged in the lower area, wherein the length of the second bowtie-shaped slot arm is greater than the length of the first bowtie-shaped slot arm, and a plurality of rectangular slots are symmetrically arranged on both sides of the second bowtie-shaped slot arm to form a fishbone-shaped slot; The microstrip feed line is a bent microstrip line, the tail end of which passes horizontally through the middle projection position of the two arms of the asymmetric bowtie-shaped slot to couple and feed the slot radiator, and the end opens to form a fan-shaped capacitor sheet for adjusting impedance matching.

4. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 3, characterized in that: One side of the second bowtie-shaped slot arm is provided with 2 to 5 rectangular slots, and the distance between adjacent rectangular slots is 1 to 12 mm.

5. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 4, characterized in that: The slot structure located in the vertical section of the microstrip feeder is a trapezoidal slot structure, and the width gradually increases from bottom to top; the slot structure located in the horizontal section of the microstrip feeder is a rectangular slot structure with the same width.

6. A structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna as described in any one of claims 2 to 5, characterized in that: The vertically polarized antenna comprises a vertically polarized dielectric substrate; The front side of the vertically polarized dielectric substrate is provided with a gradient microstrip line, and the back side is provided with a gradient microstrip line ground and a dipole radiator; The dipole radiator is composed of two folded dipole arms arranged in mirror symmetry, the width of the folded dipole arms gradually increases from the starting end to the end, and the end is bent downward; The upper end of the gradient microstrip line ground is connected to the starting end of a folded dipole arm; the lower end of the gradient microstrip line is the feeding end of the vertical polarization antenna, and the upper end is connected to the starting end of another folded dipole arm through a metal via; the gradient microstrip line and the gradient microstrip line ground together constitute an exponentially gradient feeding balun, which serves as a feeding structure for the dipole radiator.

7. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 6, characterized in that: The bottom structure includes a bottom dielectric substrate, an aluminum plate arranged on the back of the bottom dielectric substrate, a horizontally polarized SMA connector, a vertically polarized SMA connector, a power divider arranged on the front of the bottom dielectric substrate, and a bent gradient microstrip line; The aluminum plate is used to support and fix the antenna unit; The horizontally polarized SMA connector is connected to the input end of the power divider, and the two output ends of the power divider are respectively connected to the microstrip feed lines of the first horizontally polarized antenna and the second horizontally polarized antenna; The vertically polarized SMA connector is connected to the input end of the meandering tapered microstrip line, and the output end of the meandering tapered microstrip line is connected to the tapered microstrip line of the vertically polarized antenna.

8. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 7, characterized in that: In the vertically polarized antenna, rectangular blocks are dug on both sides of the feeding structure so that the vertically polarized dielectric substrate forms a T-shaped structure, which is convenient for inserting the bottom dielectric substrate into the bottom side for installation and fixation.

9. The structure-multiplexed ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased array antenna according to claim 8, characterized in that: The bottom dielectric substrate and the aluminum plate are provided with three rectangular grooves, and the bottoms of the two horizontally polarized dielectric substrates and the vertically polarized dielectric substrate are respectively inserted into the corresponding rectangular grooves for installation and fixation.

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