CN112736435A - Miniaturized broadband angle circular polarization scanning phased array antenna based on tight coupling structure - Google Patents
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- 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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Abstract
The invention discloses a compact broadband angle circularly polarized scanning phased array antenna based on a tightly coupled structure, which comprises an upper dielectric layer, a radiation unit layer, a middle dielectric plate layer, a lower dielectric plate and a metal floor layer which are sequentially arranged from top to bottom, wherein the upper surface of the radiation unit layer is printed with orthogonal dipole radiation units, the lower surface of the radiation unit layer is printed with a circular metal patch, and the circular metal patch is connected with the metal floor layer through metallized through holes; a strip line T-shaped power divider is printed between the lower dielectric plate and the metal floor layer and is connected with the orthogonal dipole radiation unit through a metalized through hole; the metal floor layer is provided with a hair button which is connected with the strip line T-shaped power divider; the circular through hole penetrates through the upper-layer dielectric slab, the radiation unit layers and the middle-layer dielectric slab, and a circular grounding metal patch is arranged below the tail end of the orthogonal dipole radiation unit. The invention realizes broadband wide-angle circular polarization scanning, reduces the size of the antenna unit and can be integrally processed.
Description
Technical Field
The invention relates to the technical field of radar technology and wireless communication, in particular to a miniaturized broadband angle circularly polarized scanning phased array antenna based on a tight coupling structure.
Background
The phased array antenna is formed by arranging antenna units to form a array surface, and the amplitude and the phase of an input signal of each antenna unit are controlled to realize the spatial scanning of the synthesized wave beams of the array surface. For the broadband active phased-array antenna, the broadband T/R component is connected behind the broadband antenna unit, and the transmitting or receiving space is accurately controlled by controlling the transmitting and receiving state, amplitude and phase change of the T/R component, so that the radar and communication functions are realized. The design concept of the traditional broadband phased array is that firstly a wideband isolated phased array unit meeting the requirement is designed, then the phased array unit is placed in a corresponding array environment, the technical measure of compensating or weakening the mutual coupling effect between array elements is adopted, the possible blind spot and the directional diagram distortion during scanning are avoided, and the phased array unit can work normally to meet the performance requirement. In fact, due to the influence of mutual coupling effect between array elements in an array environment, a broadband phased array antenna has long been a big difficulty in the field of design of array antennas. Furthermore, the application of conventional wideband phased array antennas is increasingly challenging due to the high profile and weight.
In recent years, in the field of antennas, an array antenna with broadband or ultra-wideband characteristics, i.e. a tightly coupled array antenna, is developed by using strong mutual coupling between antenna elements. Different from the traditional phased array antenna which needs decoupling in design, the antenna strengthens the coupling among the units through the closely arranged antenna units, and utilizes the coupling among the array elements to realize ultra wide band and miniaturization. Therefore, the deep research on the novel antenna structure has important significance for improving various performances of the phased array antenna. The basic design concept of tightly coupled phased array antenna technology based on strong mutual coupling effect can be traced back to Wheeler's Continuous Current array (CCSA) proposed in 1965, which is an ideal array antenna without a feed structure and a reflective floor, and the input impedance and the radiation impedance both only contain a resistive component and no reactive component, and are only related to beam pointing. Wheeler further found that an ideal current layer at a certain height from the floor could have an infinite bandwidth of operation when laterally radiated. The tightly-arranged dipole array antenna reported by Munk in 2003, the book Frequency selective surfaces, the antenna and design, can obtain a current distribution similar to that of a CCSA antenna, and further, a tightly-coupled array antenna using a strong capacitively-coupled dipole is proposed.
At present, a dipole antenna is generally adopted in a tightly coupled array antenna design as an antenna array unit, an interdigital capacitor is loaded at the tail end of the dipole antenna to increase the coupling effect between array elements, and a single-layer or multi-layer dielectric plate is loaded above the antenna to serve as a wide-angle matching layer to improve the scanning characteristic of the array. Steve Holland et al proposed a Planar Dual-Polarized Array Antenna operating at 7-21GHz based on the tight coupling theory in "A7-21 GHz Dual-Polarized Planar ultra wide band modulated Antenna (PUMA) Array" in 2012, with the maximum scan angles of the E-plane and H-plane of the Antenna being up to 45 °. In 2018, the Vouvakis team expands the working bandwidth of the array to 6:1 by loading capacitive patches among the feed metal posts, and the maximum scanning angle can reach +/-60 degrees.
The upper tightly coupled antenna does some work in the aspects of realizing wide angles and wide frequency bands of the antenna, but the antennas all adopt a dual-polarization working mode and do not have circular polarization radiation capability.
Disclosure of Invention
The invention aims to provide a phased array antenna which can meet the requirements of circular polarization and broadband wide-angle scanning, has small size of an antenna unit and can be integrally processed.
The technical solution for realizing the purpose of the invention is as follows: a miniaturized broadband angle circular polarization scanning phased-array antenna based on a tight coupling structure comprises an upper-layer dielectric plate, a radiation unit layer, an orthogonal dipole antenna radiation unit, a circular metal patch, a middle-layer dielectric plate, first to fifth metalized through holes, a lower-layer dielectric plate, a metal floor layer, a hair button, a circular through hole and a strip line T-shaped power divider;
the upper dielectric layer, the radiation unit layer, the middle dielectric plate layer, the lower dielectric plate and the metal floor layer are sequentially arranged from top to bottom; a pair of orthogonal dipole antenna radiation units are printed on the upper surface of the radiation unit layer, and one arm of each dipole antenna is connected with the metal floor layer through a fourth metalized via hole and a fifth metalized via hole; a circular metal patch is printed on the lower surface of the radiation unit layer under the tail end of the antenna arm and is connected with the metal floor layer through a first metalized through hole; the lower dielectric plate is formed by pressing an upper microwave dielectric plate and a lower microwave dielectric plate, wherein the upper surface of the lower microwave dielectric plate is plated with copper, the lower surface of the lower microwave dielectric plate is sintered with a metal floor layer, metal wires are printed between the upper microwave dielectric plate and the lower microwave dielectric plate and form a strip line T-shaped power divider with a phase difference of 90 degrees, the strip line T-shaped power divider and the other arm of the orthogonal dipole antenna radiation unit are connected together through a second metalized through hole and a third metalized through hole, and feeding is carried out through the strip line T-shaped power divider with the phase difference of 90 degrees so as to form circularly polarized radiation; the metal floor layer is provided with hair buttons, and inner cores of the hair button joints penetrate through the metal floor layer and are connected with the strip line T-shaped power divider in the lower medium plate; the circular through hole penetrates through the upper medium plate, the radiation unit layer and the middle medium plate and is used for adjusting the effective dielectric constant of the upper medium plate, the radiation unit layer and the middle medium plate; and a circular grounding metal patch is arranged below the tail end of the radiation unit of the orthogonal dipole antenna.
Furthermore, the strip line T-shaped power divider feeds the metal patch of the dipole antenna in the orthogonal dipole antenna radiation unit, and adjusts the feeding phase difference between the dipole antennas in the orthogonal dipole antenna radiation unit, so that the antenna generates circularly polarized electromagnetic radiation.
Furthermore, the orthogonal dipole antenna radiation unit realizes circularly polarized radiation at 8.7-13.3 GHz.
Furthermore, the radiation unit of the orthogonal dipole antenna adopts unbalanced feed, circular metal patches are printed at the tail ends of the arms of the orthogonal dipole antenna and on the lower surface of the printed board of the radiation unit layer, the circular metal patches penetrate through the medium-layer dielectric board through first metalized through holes, and the circular metal patches are grounded to form a ridge-like waveguide structure.
Furthermore, the strip line T-shaped power divider is used for connection transition from a fuzz button to input ends of a first arm, a second metalized through hole and a third metalized through hole of a dipole in an orthogonal dipole radiation unit, has broadband matching performance of input port characteristic impedance of 100 ohms to two output port characteristic impedances of 100 ohms, and simultaneously realizes fluctuation of phase difference of the two output ports within a range of 90 degrees +/-5 degrees.
Compared with the prior art, the invention has the remarkable advantages that: (1) a pair of orthogonal dipole antennas based on a tight coupling structure is adopted as an antenna radiation unit, the impedance matching characteristic is good in the frequency band range of 8-14GHz, circular polarization radiation in the broadband range of 8.7-13.3GHz (42% of relative bandwidth) is realized by utilizing a strip line T-shaped power divider, and scanning of the E surface and the H surface is realized within +/-50 degrees; (2) the size of the antenna unit is reduced from the common 0.5 high-frequency wavelength to the 0.37 high-frequency wavelength, and the height of the antenna section is only 0.33 high-frequency wavelength; (3) the whole antenna unit is divided into a plurality of layers of printed boards and can be integrally processed.
Drawings
Fig. 1 is an exploded schematic diagram of a basic antenna unit in the master-slave boundary of the miniaturized broadband angle circularly polarized scanning phased array antenna based on the close coupling structure.
Fig. 2 is a schematic top view of the basic antenna unit in the master-slave boundary of the miniaturized wideband angular circularly polarized scanning phased array antenna based on the close coupling structure.
Fig. 3 is a schematic top view of the basic antenna unit in the master-slave boundary of the miniaturized wideband angular circularly polarized scanning phased array antenna based on the close coupling structure.
Fig. 4 is a schematic side view of the basic antenna unit in the master-slave boundary of the miniaturized wideband angle circular polarization scanning phased array antenna based on the close coupling structure.
Fig. 5 is a phase characteristic of an output port of a stripline power divider of a single antenna element in an embodiment. It can be seen that the stripline power divider developed in this specific embodiment has an output port phase difference fluctuating around 90 ° within 8-14GHz, and meets the port phase requirement for realizing circularly polarized radiation.
FIG. 6 shows the axial ratio characteristics of a single antenna element in an embodiment in the master-slave boundary at 8-14 GHz. It can be seen that the miniaturized wide-bandwidth angle circularly polarized scanning phased array antenna based on the close-coupled structure, which is developed according to the specific embodiment, has an axial ratio smaller than 3 in the frequency band range of 8.7-13.3 GHz.
FIG. 7 shows the standing wave behavior of the exemplary embodiment at the master-slave boundary when the individual antenna elements are scanned in the E-plane in the 8-14GHz band. Therefore, the miniaturized wide-bandwidth angle circularly polarized scanning phased array antenna based on the tight coupling structure, which is developed according to the specific embodiment, has the standing-wave ratio smaller than 2.3 when the antenna is scanned at 0-50 degrees in the range of 8.7-13.3GHz circularly polarized frequency bands.
FIG. 8 shows the standing wave characteristics of the embodiment in the master-slave boundary when the individual antenna elements are scanned in the H-plane in the 8-14GHz band. Therefore, the miniaturized wide-bandwidth angle circularly polarized scanning phased array antenna based on the tight coupling structure, which is developed according to the specific embodiment, has the standing-wave ratio smaller than 2 when the antenna is scanned at 0-50 degrees in the range of 8.7-13.3GHz circularly polarized frequency bands.
FIG. 9 shows the radiation pattern of the exemplary embodiment in the scanning state of 0-50 DEG in the E plane at the frequency point of 11 GHz.
FIG. 10 shows the radiation pattern of the exemplary embodiment in the 0-50 scanning state of the E plane at the frequency point of 13 GHz.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
With reference to fig. 1, 2, 3 and 4, the invention relates to a compact wide-band angular circular polarization scanning phased array antenna based on a tight coupling structure, 1, a compact wide-band angular circular polarization scanning phased array antenna based on a tight coupling structure, which is characterized by comprising an upper dielectric plate 101, a radiation unit layer 102, an orthogonal dipole antenna radiation unit 103, a circular metal patch 104, a middle dielectric plate 105, first to fifth metallized through holes 106, 112, 113, 114, 115, a lower dielectric plate, a metal floor layer 109, a fuzz button 110, a circular through hole 111 and a strip line T-shaped power divider 116;
the upper dielectric layer 101, the radiation unit layer 102, the middle dielectric layer 105, the lower dielectric layer and the metal floor layer 109 are sequentially arranged from top to bottom; a pair of orthogonal dipole antenna radiation units 103 is printed on the upper surface of the radiation unit layer 102, and one arm of each dipole antenna is connected with the metal floor layer 109 through a fourth metalized via hole 114 and a fifth metalized via hole 115; a circular metal patch 104 is printed on the lower surface of the radiation unit layer 102 right below the tail end of the antenna arm, and the circular metal patch 104 is connected with a metal floor layer 109 through a first metalized through hole 106; the lower dielectric plate is formed by laminating an upper microwave dielectric plate 107 and a lower microwave dielectric plate 108, wherein the upper surface of the lower microwave dielectric plate 108 is plated with copper, the lower surface of the lower microwave dielectric plate is sintered with a metal floor layer 109, metal wires are printed between the upper microwave dielectric plate 107 and the lower microwave dielectric plate 108, the metal wires form a strip line T-shaped power divider 116 with a phase difference of 90 degrees, the strip line T-shaped power divider 116 and the other arm of the orthogonal dipole antenna radiation unit 103 are connected together through a second metalized via hole 112 and a third metalized via hole 113, and feeding is performed through the strip line T-shaped power divider 116 with the phase difference of 90 degrees so as to form circularly polarized radiation; the metal floor layer 109 is provided with a hair button 110, and the inner core of the joint of the hair button 110 penetrates through the metal floor layer 109 to be connected with a strip line T-shaped power divider 116 in the lower medium plate; the circular through hole 111 penetrates through the upper dielectric slab 101, the radiation unit layer 102 and the middle dielectric slab 105 and is used for adjusting the effective dielectric constant of the upper dielectric slab 101, the radiation unit layer 102 and the middle dielectric slab 105; and a circular grounding metal patch is arranged below the tail end of the orthogonal dipole antenna radiation unit 103.
Further, the strip line T-shaped power divider 116 feeds the metal patches of the dipole antenna in the orthogonal dipole antenna radiation unit 103, and adjusts the feeding phase difference between the dipole antennas in the orthogonal dipole antenna radiation unit 103, so that the antenna generates circularly polarized electromagnetic radiation.
Further, the orthogonal dipole antenna radiation unit 103 realizes circularly polarized radiation at 8.7-13.3 GHz.
Furthermore, the orthogonal dipole antenna radiation unit 103 adopts unbalanced feed, a circular metal patch 104 is printed at the tail end of the orthogonal dipole antenna arm and on the lower surface of the printed board of the radiation unit layer 102, the circular metal patch 104 penetrates through the middle dielectric board 105 through a first metalized via hole 106, and the circular metal patch 104 is grounded to form a ridge-like waveguide structure.
Further, the strip line T-shaped power divider 116 is used for connection transition from the fuzz button 110 to the input ends of the first arm, the second metalized via 112 and the third metalized via 113 of the dipole in the orthogonal dipole radiation unit 103, has a broadband matching performance of an input port characteristic impedance of 100 ohms to two output port characteristic impedances of 100 ohms, and simultaneously realizes that the phase difference of the two output ports fluctuates within a range of 90 ° ± 5 °.
Example 1
A miniaturized wideband angular circularly polarized scanning phased array antenna based on a close-coupled structure in this embodiment takes the form of a 9 × 9 planar array, as shown in fig. 1. The basic antenna unit structure is shown in fig. 2, and the upper dielectric plate 101 can improve the impedance matching characteristic when the antenna scans; a pair of orthogonal dipole antenna radiation units 103 is printed on the upper surface of the radiation unit layer 102, and one arm of the dipole antenna is connected with the metal floor layer 109 through a fourth metalized via hole 114 and a fifth metalized via hole 115; the circular metal patch 104 is printed on the lower surface of the printed board of the radiation unit layer 102 right below the tail end of the antenna arm and is connected with the metal floor layer 109 through a first metalized through hole 106; the middle dielectric plate 105 is laminated below the upper dielectric plate 101 and the radiation unit layer 102, plays a supporting role, and can reduce the profile height of the antenna; the lower dielectric plate for feeding is formed by laminating an upper microwave dielectric plate 107 and a lower microwave dielectric plate 108, wherein the upper surface of the lower dielectric plate is plated with copper, the lower surface of the lower dielectric plate is sintered with a metal floor layer 109, a metal wire is printed in the middle of the lower dielectric plate to form a strip line T-shaped power divider 116 with a phase difference of 90 degrees, the strip line T-shaped power divider 116 and the other arm of the orthogonal dipole antenna radiation unit 103 are connected together through second and third metalized through holes 112 and 113, and feeding is performed through the strip line T-shaped power divider 116 with the phase difference of 90 degrees to form circularly polarized radiation; the fuzz buttons 110 are positioned inside the metal floor layer 109, and the inner cores of the fuzz buttons are connected with the strip line T-shaped power divider 108; the circular through hole 111 penetrates through the upper dielectric slab 101, the radiation unit layer 102 and the middle dielectric slab 105, and plays a role in adjusting the effective dielectric constant of the microwave dielectric slab.
The characteristic impedances of the input and output ports of the strip line T-shaped power divider 108 with the phase difference of 90 ° in the embodiment are all 100 ohms, and the characteristic impedances are connected through a transmission line with 1/4 wavelength impedance transformation, so as to improve the impedance matching effect of the antenna and effectively reduce the active voltage standing wave ratio of the antenna unit. FIG. 5 shows the phase of the two output ports, and it can be seen that the phase difference of the two output ports fluctuates around 90 degrees in the 8-14GHz direction; fig. 6 shows the axial ratio characteristics of the basic antenna unit in 8-14GHz, and it can be seen that the axial ratio of the basic antenna unit is less than 3 in the frequency band of 8.7-13.3GHz, and the basic antenna unit is circularly polarized radiation.
Fig. 7 and fig. 8 respectively show simulation results of the E-plane and H-plane active voltage standing wave ratios of the antenna unit varying with frequency under different scanning angles, and fig. 9 and fig. 10 show radiation patterns of two typical frequency points of 11GHz and 13GHz in the embodiment during E-plane scanning. As can be seen, the active voltage standing wave ratio in the frequency band range of circular polarization 8.7-13.3GHz is less than 2.3 within the scanning range of +/-50 degrees of the E surface; and when the scanning range of the H surface is +/-50 degrees, the active voltage standing wave ratio of the circularly polarized 7-13.3GHz frequency band range is less than 2.
In the embodiment, the directional diagram of the 9 × 9 finite large area array is simulated by adopting the directional diagram superposition principle in electromagnetic simulation. Based on the periodic unit described in fig. 2, the infinite array can be extended to any practically finite array for practical application needs.
In conclusion, the pair of orthogonal dipole antennas based on the tight coupling structure is adopted as the antenna radiation unit, the impedance matching characteristic is good in the frequency band range of 8-14GHz, circular polarization radiation in the broadband range of 8.7-13.3GHz (42% of relative bandwidth) is realized by utilizing the strip line T-shaped power divider, and +/-50-degree scanning of an E surface and an H surface is realized; the size of the antenna unit is reduced from the common 0.5 high-frequency wavelength to the 0.37 high-frequency wavelength, and the height of the antenna section is only 0.33 high-frequency wavelength; the whole antenna unit is divided into a plurality of layers of printed boards and can be integrally processed.
Claims (5)
1. A miniaturized broadband angle circular polarization scanning phased-array antenna based on a tight coupling structure is characterized by comprising an upper-layer dielectric plate (101), a radiation unit layer (102), an orthogonal dipole antenna radiation unit (103), a circular metal patch (104), a middle-layer dielectric plate (105), first to fifth metalized through holes (106, 112, 113, 114, 115), a lower-layer dielectric plate, a metal floor layer (109), a fuzz button (110), a circular through hole (111) and a strip line T-shaped power divider (116);
the upper dielectric layer (101), the radiation unit layer (102), the middle dielectric layer (105), the lower dielectric layer and the metal floor layer (109) are sequentially arranged from top to bottom; a pair of orthogonal dipole antenna radiation units (103) is printed on the upper surface of the radiation unit layer (102), and one arm of each dipole antenna is connected with the metal floor layer (109) through a fourth metalized via hole (114) and a fifth metalized via hole (115); a circular metal patch (104) is printed on the lower surface of the radiation unit layer (102) right below the tail end of the antenna arm, and the circular metal patch (104) is connected with a metal floor layer (109) through a first metalized through hole (106); the lower-layer dielectric plate is formed by pressing an upper-layer microwave dielectric plate (107) and a lower-layer microwave dielectric plate (108), wherein the upper surface of the lower-layer microwave dielectric plate (108) is plated with copper, the lower surface of the lower-layer microwave dielectric plate is sintered with a metal floor layer (109), metal wires are printed between the upper-layer microwave dielectric plate (107) and the lower-layer microwave dielectric plate (108), the metal wires form a strip line T-shaped power divider (116) with a phase difference of 90 degrees, the strip line T-shaped power divider (116) is connected with the other arm of the orthogonal dipole antenna radiation unit (103) through a second metalized through hole (112) and a third metalized through hole (113), and feeding is carried out through the strip line T-shaped power divider (116) with the phase difference of 90 degrees so as to form circularly polarized radiation; the metal floor layer (109) is provided with a hair button (110), and the inner core of the joint of the hair button (110) penetrates through the metal floor layer (109) to be connected with a strip line T-shaped power divider (116) in the lower medium plate; the circular through hole (111) penetrates through the upper-layer dielectric slab (101), the radiation unit layer (102) and the middle-layer dielectric slab (105) and is used for adjusting the effective dielectric constants of the upper-layer dielectric slab (101), the radiation unit layer (102) and the middle-layer dielectric slab (105); and a circular grounding metal patch is arranged below the tail end of the orthogonal dipole antenna radiation unit (103).
2. The compact wide-bandwidth angle circular polarization scanning phased array antenna based on the close-coupled structure as claimed in claim 1, characterized in that the strip line T-shaped power divider (116) is used to feed the metal patch of the dipole antenna in the orthogonal dipole antenna radiation unit (103), and the phase difference of feeding between the dipole antennas in the orthogonal dipole antenna radiation unit (103) is adjusted to make the antenna generate circular polarization electromagnetic radiation.
3. The compact wide-bandwidth angle circularly polarized scanning phased array antenna based on the tightly coupled structure as claimed in claim 1, wherein the orthogonal dipole antenna radiation unit (103) realizes circularly polarized radiation at 8.7-13.3 GHz.
4. The miniaturized wideband angular circularly polarized scanning phased-array antenna based on the close-coupled structure as claimed in claim 1, wherein the orthogonal dipole antenna radiating element (103) adopts unbalanced feeding, a circular metal patch (104) is printed on the tail end of the orthogonal dipole antenna arm and the lower surface of the printed board of the radiating element layer (102), the circular metal patch (104) penetrates through the middle dielectric board (105) through the first metalized via hole (106), and the circular metal patch (104) is grounded to form a ridge-like waveguide structure.
5. The miniaturized broadband angular circularly polarized scanning phased-array antenna based on the close-coupled structure according to claim 1, characterized in that the stripline T-shaped power divider (116) is used for connecting and transitioning the input ends of the first arm of the dipole, the second metalized via (112) and the third metalized via (113) in the orthogonal dipole radiating unit (103) from the ground button (110), has a broadband matching performance of an input port characteristic impedance of 100 ohms to two output port characteristic impedances of 100 ohms, and simultaneously realizes that the phase difference of the two output ports fluctuates in a range of 90 ° ± 5 °.
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Cited By (7)
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| CN113437530A (en) * | 2021-07-06 | 2021-09-24 | 上海航天测控通信研究所 | Broadband miniaturized stripline dual-circular polarization network |
| CN113725628A (en) * | 2021-08-19 | 2021-11-30 | 武汉大学 | Addressable three-dimensional beam scanning liquid crystal microwave phased array and control method |
| CN114050407A (en) * | 2021-10-28 | 2022-02-15 | 中国科学院空天信息创新研究院 | Waveguide mode excitation structure, method and application thereof |
| CN114069257A (en) * | 2021-11-17 | 2022-02-18 | 中国人民解放军国防科技大学 | Ultra-wideband dual-polarized phased array antenna based on strong coupling dipoles |
| CN114512827A (en) * | 2022-02-24 | 2022-05-17 | 西安电子科技大学 | Ultra-wideband 45-degree-oblique polarization tightly-coupled array antenna |
| CN115117608A (en) * | 2022-07-05 | 2022-09-27 | 湖南航祥机电科技有限公司 | Tightly-coupled ultra-wideband dual-polarized phased array antenna |
| CN117353047A (en) * | 2023-10-10 | 2024-01-05 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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| CN113437530A (en) * | 2021-07-06 | 2021-09-24 | 上海航天测控通信研究所 | Broadband miniaturized stripline dual-circular polarization network |
| CN113437530B (en) * | 2021-07-06 | 2023-01-20 | 上海航天测控通信研究所 | Broadband miniaturized stripline dual-circular polarization network |
| CN113725628A (en) * | 2021-08-19 | 2021-11-30 | 武汉大学 | Addressable three-dimensional beam scanning liquid crystal microwave phased array and control method |
| CN114050407A (en) * | 2021-10-28 | 2022-02-15 | 中国科学院空天信息创新研究院 | Waveguide mode excitation structure, method and application thereof |
| CN114050407B (en) * | 2021-10-28 | 2023-09-26 | 中国科学院空天信息创新研究院 | Waveguide mode excitation structure, method and application thereof |
| CN114069257A (en) * | 2021-11-17 | 2022-02-18 | 中国人民解放军国防科技大学 | Ultra-wideband dual-polarized phased array antenna based on strong coupling dipoles |
| CN114512827A (en) * | 2022-02-24 | 2022-05-17 | 西安电子科技大学 | Ultra-wideband 45-degree-oblique polarization tightly-coupled array antenna |
| CN114512827B (en) * | 2022-02-24 | 2023-08-15 | 西安电子科技大学 | Ultra-wideband 45-degree polarized tight coupling array antenna |
| CN115117608A (en) * | 2022-07-05 | 2022-09-27 | 湖南航祥机电科技有限公司 | Tightly-coupled ultra-wideband dual-polarized phased array antenna |
| CN117353047A (en) * | 2023-10-10 | 2024-01-05 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
| CN117353047B (en) * | 2023-10-10 | 2024-05-17 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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