CN116191054A - Small-sized dual-polarization ultra-wideband array antenna device based on aircraft carrier - Google Patents
Small-sized dual-polarization ultra-wideband array antenna device based on aircraft carrier Download PDFInfo
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Abstract
The invention relates to the technical field of dual polarized antenna manufacturing, in particular to a small dual polarized ultra wideband array antenna device based on an aircraft carrier, which has compact structure, small volume and reliable operation, can effectively reduce the coupling between an active antenna and a passive antenna, is provided with an aircraft carrier platform, wherein the antenna installation space on the aircraft carrier platform is a disc-shaped metal structure, a plurality of uniformly distributed antenna units are adopted on the carrier platform to form an ultra wideband dual polarized antenna array, a circular ring-shaped microwave absorbing material is loaded in the space of the circular antenna array, and metal conductor isolation walls are loaded at the inner and outer edges of the circular ring-shaped microwave absorbing material, and can improve the isolation between groups of passive radar antennas; and cutting a cavity with the radius r hole in the microwave absorbing material at the position of each antenna unit for placing the ultra-wideband dual-polarized antenna units, so as to realize reasonable layout of the antenna units and the microwave absorbing material.
Description
Technical field:
the invention relates to the technical field of dual-polarized antenna manufacturing, in particular to a small dual-polarized ultra-wideband array antenna device based on an aircraft carrier, which has the advantages of compact structure, small volume and reliable operation, can effectively reduce the coupling between an active antenna and a passive antenna, and is beneficial to the signal receiving and signal processing of the whole radar system.
The background technology is as follows:
in passive detection radar systems, dual polarized ultra wideband signal sensing and processing is of increasing interest. The dual polarized ultra wideband antenna array is a key component of the dual polarized passive detection radar, and the performance plays an important role in the performance of the whole radar system. On aircraft carriers, the installation space of radar antennas is very limited, and therefore miniaturization of ultra-wideband dual-polarized antennas is an important design task. In general, considering the parameter measurement requirement of a passive detection radar, the radar system mostly adopts an array form, and when designing an antenna array, the influence of a carrier platform on the radiation characteristics of the antenna array is considered, and meanwhile, the electromagnetic coupling between antenna units is reduced as much as possible, so that the integrated design of the array antenna and the platform is performed in a limited space, and the technical indexes such as voltage standing wave ratio, isolation, directional diagram and the like are considered. Ultra-wideband dual polarized antennas are of numerous types, for example, dual polarized log periodic antennas, dual polarized Vivaldi antennas, dual polarized sinusoidal antennas, dual polarized four-ridge horn antennas, and the like. The dual-polarized four-ridge horn antenna has the advantages of reliable structure, simple design, stable performance and the like, and becomes an ultra-wideband dual-polarized antenna form suitable for engineering application.
In practical engineering application, the antenna miniaturization method comprises the steps of improving dielectric parameters and magnetic permeability of a medium space, adopting a fractal structure, a meander technology, a loading technology and the like. In the miniaturized design of ultra-wideband dual polarized antennas, electrical performance indicators at low frequencies, including voltage standing wave ratio and radiation pattern performance, are important considerations.
The invention comprises the following steps:
aiming at the defects and shortcomings in the prior art, the invention provides a small dual-polarized ultra-wideband array antenna device based on an aircraft carrier, which has the advantages of compact structure, small volume and reliable operation, can effectively reduce the coupling between an active antenna and a passive antenna, and is beneficial to the signal receiving and signal processing of the whole radar system.
The invention is achieved by the following measures:
a small-sized dual-polarization ultra-wideband array antenna device based on an aircraft carrier is characterized by comprising an aircraft carrier platform, wherein an antenna installation space on the aircraft carrier platform is of a disc-shaped metal structure, a plurality of uniformly distributed antenna units are adopted on the carrier platform to form an ultra-wideband dual-polarization antenna array, a circular microwave absorbing material is loaded in the space of the circular antenna array, and the inner radius and the outer radius of the circular microwave absorbing material are respectively R 1 And R is 2 The height of the loaded circular ring-shaped microwave absorbing material is h_absorber; metal conductor isolation walls are loaded on the inner edge and the outer edge of the annular microwave absorbing material, the height of the metal conductor isolation walls is also h absorber, the thickness is twall, and the metal conductor isolation walls can improve the passive radar antenna
Isolation between lines; cutting a cavity with a radius r hole in the microwave absorbing material at the position of each antenna unit for placing the ultra-wideband dual-polarized antenna units, so as to realize reasonable layout of the antenna units and the microwave absorbing material;
each antenna unit is internally provided with an ultra-wideband open boundary dual-polarized horn antenna radiator which comprises four metal ridges, a metal reflecting floor, a metal resonant cavity and a coaxial line port and a probe, wherein the four metal ridges are arranged in a central symmetry mode, the metal reflecting floor is loaded with microwave absorbing materials, the metal resonant cavity is used for feeding, the coaxial line port is used for feeding, the metal ridges are in an exponential curve shape, and in a ridge horn section, a ridge curve adopts an exponential curve form: y (x) =ae kx +cx+c 3 (1) Wherein: 0 < x < L, L is the height of the horn antenna, x is the central axis coordinate of the horn antenna, a, c 3 The values are undetermined coefficients respectively, and are determined according to the required size of the mouth surface of the horn antenna.
Width a of feed resonant cavity of horn antenna radiator in antenna unit of the invention 2 The length is h_cavity, in order to improve the impedance matching effect of the horn antenna, reduce the voltage standing wave ratio of the low frequency band, the resonant cavity feed part of the antenna adopts a ladder-shaped structure, and in the design of the metal cavity feed structure, the parameter f is adjusted 1 、f 2 、f 3 、g 1 And g 2 The input impedance of the pattern of the four-ridge horn antenna is adjusted.
The invention fills microwave absorbing material at the bottom of the metal reflecting cavity, and the thickness of the microwave absorbing material is t absorber The method has the effects of reducing the voltage standing wave ratio at the low frequency of the ultra-wideband antenna, improving the matching performance, regulating and controlling the radiation pattern of the antenna, and determining the electromagnetic parameters and the height of the microwave absorbing material by a full-wave electromagnetic simulation method.
In order to improve the radiation pattern of the dual-polarized ultra-wideband antenna, the invention adopts a local medium loading mode, a loaded medium block is positioned in the central area of the port surface of the antenna, namely in the center of four metal ridges, the loaded medium block can change local equivalent dielectric constants, regulate and control the electromagnetic field distribution on the aperture of the antenna, further improve the shape of the radiation pattern, widen the beam width, expand the working bandwidth of a horn feed source of four ridges and adjust the parameter x 1 、x 2 、x 3 、x 4 、y 1 And y 3 By adjusting the pattern of the four-ridge horn antenna loaded by the medium, it can be seen that the shape of the medium block is also a horn-like main body which is gradually unfolded along with the shape of the four metal ridges, wherein the relative dielectric constant of the medium block is also an important design parameter which has a great influence on the radiation performance of the antenna, and the parameter x is that 1 、x 2 、x 3 、x 4 、y 1 、y 3 And the relative dielectric constant of the dielectric block is determined by a full wave electromagnetic simulation method.
The invention provides a design scheme and an antenna structure device of a small dual-polarized ultra-wideband array antenna based on an aircraft carrier platform. The antenna device adopts a four-ridge horn antenna structure similar to an open boundary, and a medium loading technology is introduced to improve the radiation pattern of the dual-polarized antenna; in the design of the dual-polarized ultra-wideband antenna unit, starting from the miniaturization target of the ultra-wideband antenna, the invention optimally designs and improves the feed cavity structure of the dual-polarized antenna, and improves the impedance matching and radiation performance of the low frequency part of the dual-polarized antenna by designing the shape of the cavity and loading microwave absorbing materials at the bottom of the cavity; the voltage standing wave ratio and the radiation pattern performance in the ultra-wideband are obtained by jointly optimizing the size, the shape and the structural parameters of the feed cavity of the four metal ridges. According to the ultra-wideband dual-polarized circular array, after the antenna is miniaturized, under the condition that the space between array units is smaller, electromagnetic coupling between the antenna units is larger, meanwhile, due to the fact that the carrier platform is usually of a metal conductor structure and conductor boundary conditions have larger influence on the radiation performance of the ultra-wideband dual-polarized antenna, microwave absorbing materials are loaded on the metal platform, and in consideration of the layout form of the ultra-wideband dual-polarized antenna array, the microwave absorbing materials are of circular ring structures, and the electromagnetic coupling degree and the radiation characteristic of the dual-polarized antenna are regulated and controlled by adjusting the radial size and the vertical height of the microwave absorbing materials; consider the active and passive composite antenna application scenario. The metal isolation wall structure is loaded on the outer edge of the microwave absorbing material, so that the coupling between the active antenna and the passive antenna is further reduced, and the signal processing work of the radar system is facilitated.
Description of the drawings:
fig. 1 is a schematic view of the antenna unit structure of the present invention, in which fig. 1 (a) is a perspective view, fig. 1 (b) is a front view, fig. 1 (c) is a rear view, fig. 1 (d) is a left view, fig. 1 (e) is a right view, fig. 1 (f) is a top view, and fig. 1 (g) is a bottom view.
Fig. 2 is a schematic view of the structure of the loading medium in the present invention, in which fig. 2 (a) is a perspective view of the loading medium, fig. 2 (b) is a front view, fig. 2 (c) is a rear view, fig. 2 (d) is a left view, fig. 2 (e) is a right view, fig. 2 (f) is a top view, and fig. 2 (g) is a bottom view.
Fig. 3 is a schematic structural view of the array antenna of the present invention, in which fig. 3 (a) is a perspective view, fig. 3 (b) is a front view, fig. 3 (c) is a rear view, fig. 3 (d) is a left view, fig. 3 (e) is a right view, fig. 3 (f) is a top view, and fig. 3 (g) is a bottom view.
Fig. 4 is a simulation result of circuit characteristics of an antenna port in an embodiment of the present invention, wherein the isolation between VSWR of port 1, VSWR of port 2, and VSWR of port 4 (c) of fig. 4 (a).
Fig. 5 shows simulation results of radiation characteristics of the port 1 at a frequency of 2GHz according to an embodiment of the present invention, in which 5 (a) is a three-dimensional gain pattern, 5 (b) is a three-dimensional axial ratio pattern, 5 (c) is a gain pattern on the xoz plane, 5 (d) is an axial ratio pattern on the xoz plane, 5 (e) is a gain pattern on the yoz plane, and 5 (f) is an axial ratio pattern on the yoz plane.
FIG. 6 is a simulation result of radiation characteristics of port 2 at a frequency of 2GHz in an embodiment of the invention, where 6 (a) is a three-dimensional gain pattern, 6 (b) is a three-dimensional axial ratio pattern, 6 (c) is a gain pattern on plane xoz, 6 (d) is an axial ratio pattern on plane xoz, 6 (e) is a gain pattern on plane yoz, and 6 (f) is an axial ratio pattern on plane yoz
FIG. 7 shows the results of simulation of radiation characteristics of port 1 at a frequency of 3GHz in an embodiment of the invention, where 7 (a) is a three-dimensional gain pattern, 7 (b) is a three-dimensional axial ratio pattern, 7 (c) is a gain pattern on plane xoz, 7 (d) is an axial ratio pattern on plane xoz, 7 (e) is a gain pattern on plane yoz, and 7 (f) is an axial ratio pattern on plane yoz
FIG. 8 is a simulation result of radiation characteristics of port 2 at a frequency of 3GHz in an embodiment of the invention, where 8 (a) is a three-dimensional gain pattern, 8 (b) is a three-dimensional axial ratio pattern, 8 (c) is a gain pattern on plane xoz, 8 (d) is an axial ratio pattern on plane xoz, 8 (e) is a gain pattern on plane yoz, and 8 (f) is an axial ratio pattern on plane yoz
Fig. 9 shows the radiation characteristic simulation results of the port 1 at the frequency of 4GHz in the embodiment of the present invention, wherein 9 (a) is a three-dimensional gain pattern, 9 (b) is a three-dimensional axial ratio pattern, 9 (c) is a gain pattern on the xoz plane, 9 (d) is an axial ratio pattern on the xoz plane, 9 (e) is a gain pattern on the yoz plane, and 9 (f) is an axial ratio pattern on the yoz plane.
Fig. 10 shows the radiation characteristic simulation results of the port 2 at the frequency of 4GHz, in which 10 (a) is a three-dimensional gain pattern, 10 (b) is a three-dimensional axial ratio pattern, 10 (c) is a gain pattern on the xoz plane, 10 (d) is an axial ratio pattern on the xoz plane, 10 (e) is a gain pattern on the yoz plane, and 10 (f) is an axial ratio pattern on the yoz plane.
FIG. 11 simulation results of radiation characteristics of port 1 at a frequency of 5GHz, where 11 (a) is a three-dimensional gain pattern, 11 (b) is a three-dimensional axial ratio pattern, 11 (c) is a gain pattern on plane xoz, 11 (d) is an axial ratio pattern on plane xoz, 11 (e) is a gain pattern on plane yoz, and 11 (f) is an axial ratio pattern on plane yoz
FIG. 12 shows simulation results of radiation characteristics of port 2 at a frequency of 5GHz, in which 12 (a) is a three-dimensional gain pattern, 12 (b) is a three-dimensional axial ratio pattern, 12 (c) is a gain pattern on the xoz plane, 12 (d) is an axial ratio pattern on the xoz plane,
12 (e) gain pattern at yoz plane and 12 (f) axial ratio pattern at yoz plane.
Reference numerals: 1 is the metal ridge of the horn antenna, 2 is the medium loading of the horn antenna, 3 is the feed coaxial connector of the horn antenna, 4 is the metal cavity of the horn antenna, 5 is the wave absorbing material filled in the metal cavity structure of the horn antenna, and 6 is the ladder resonator of the horn antenna.
The specific embodiment is as follows:
the invention will be further described with reference to the drawings and examples.
The invention starts from the four-ridge horn antenna with an open boundary, carries out deformation treatment on the feed metal cavity of the antenna and loads microwave absorbing material at the bottom of the feed metal cavity, reduces the standing wave ratio of the low frequency band of the ultra-wideband antenna and improves the radiation performance of the low frequency band; the use of localized dielectric loading improves the pattern shape and matching performance of the antenna. The two polarized ports of the dual-polarized antenna designed by the invention are separated by a certain distance in the normal direction of the antenna port surface, and the distance is as small as possible, so that the two polarized ports are ensured to have higher polarization isolation and better radiation characteristic symmetry can be obtained. The invention designs a small dual-polarized ultra-wideband array antenna unit structure model as shown in figure 1. In fig. 1, 1 is a metal ridge structure of a horn antenna, 2 is a dielectric loading structure of the horn antenna, 3 is a feed coaxial connector of the horn antenna, 4 is a metal cavity structure of the horn antenna, 5 is a wave absorbing material filled in the metal cavity structure of the horn antenna, and 6 is a stepped resonator structure of the horn antenna. The polarized port 1 of the dual polarized antenna is defined as the lower port, the polarized port 2 is defined as the upper port, and the distance between the two polarized ports is determined by adopting a full wave electromagnetic simulation method. Fig. 2 is a schematic diagram of a loading medium structure, and fig. 3 is a schematic diagram of a small dual-polarized ultra-wideband antenna structure based on an aircraft carrier platform.
The structure of the ultra-wideband open-boundary dual-polarized horn antenna radiator designed by the invention is shown in figure 2, and the structure comprises an exponential curve-shaped metal ridge, a metal reflection floor loaded with microwave absorbing materials, a metal resonant cavity for feeding, a coaxial line port for feeding and a probe. In designing the ridge profile, the profile of the ridge is reasonably selected to achieve impedance matching and radiation pattern characteristics. In the ridge horn section, the ridge curve adopts an exponential curve form as follows:
y(x)＝ae kx +cx+c 3 (1)
wherein: 0 < x < L, L is the height of the horn antenna, x is the central axis coordinate of the horn antenna, a, c 3 The values are undetermined coefficients respectively, and are determined according to the required size of the mouth surface of the horn antenna.
Width a of feed resonant cavity of horn antenna 2 The length is h_cavity. In order to improve the impedance matching effect of the horn antenna and reduce the voltage standing wave ratio of the low frequency band, the feed part of the resonant cavity of the antenna adopts a ladder-shaped structure, as shown in fig. 1. In the design of a metal cavity feed structure, the parameter f is adjusted 1 、f 2 、f 3 、g 1 And g 2 The input impedance of the pattern of the four-ridge horn antenna is adjusted. The bottom of the metal reflecting cavity is filled with microwave absorbing material with the thickness t absorber The method has the effects of reducing the voltage standing wave ratio at the low frequency of the ultra-wideband antenna, improving the matching performance, regulating and controlling the radiation pattern of the antenna, and determining the electromagnetic parameters and the height of the microwave absorbing material by a full-wave electromagnetic simulation method.
In order to improve the radiation pattern of the dual-polarized ultra-wideband antenna, the invention adopts a local medium loading mode, the loaded medium block is positioned in the middle part area of the mouth surface of the antenna, the loaded medium block can change the local equivalent dielectric constant, and the electromagnetic field distribution on the aperture of the antenna is regulated and controlled, thereby improving the shape of the radiation pattern, widening the beam width and expanding the working bandwidth of the horn feed source with four ridges. In the design of the dielectric block shown in fig. 2, the parameter x is adjusted 1 、x 2 、x 3 、x 4 、y 1 And y 3 The directional diagram of the four-ridge horn antenna loaded by the medium is adjusted, and the approximate shape of the medium block is gradually unfolded along with the shape of the four metal ridges, wherein the relative dielectric constant of the medium block is also an important design parameter, and the parameter has a great influence on the radiation performance of the antenna. Parameter x 1 、x 2 、x 3 、x 4 、y 1 、y 3 And the relative dielectric constant of the dielectric block is determined by a full wave electromagnetic simulation method.
Typically, the antenna mounting space is a disk-shaped metallic structure on an aircraft carrier platform that has a large impact on the radiation pattern of the antenna. In order to realize the measurement of the signal direction of arrival of the radar system, a plurality of antenna units are usually required to be installed on a carrier platform to form an antenna array, so that the circular N-unit ultra-wideband dual-polarized antenna array with uniform layout is adopted in the invention, and the antenna layout is shown in fig. 3. In the space of the circular antenna array, a circular microwave absorbing material is loaded, and the inner radius and the outer radius of the circular microwave absorbing material are respectively R 1 And R is 2 The height of the loaded circular ring-shaped microwave absorbing material is h_absorber; metal conductor isolation walls are loaded on the inner edge and the outer edge of the circular ring-shaped microwave absorbing material, the height of the metal conductor isolation walls is also h_absorber, the thickness of the metal conductor isolation walls is t_wall, and the metal conductor isolation walls can improve isolation among groups of passive radar antennas; cutting a cavity with radius of r_hole in the microwave absorbing material at the position of each antenna unit for placing ultra-wideband dual-polarized antennaAnd the line unit realizes reasonable layout of the antenna unit and the microwave absorbing material. Parameter R of microwave absorbing material structure 1 、R 2 H_absorber and r_hole are determined by full wave electromagnetic simulation methods.
Examples:
the embodiment designs a small dual-polarized ultra-wideband antenna array device based on an aircraft carrier platform, performance simulation is carried out on the antenna array by adopting a full-wave electromagnetic simulation technology, and simulation experiment results prove the feasibility of the small dual-polarized ultra-wideband antenna array based on the aircraft carrier platform.
The circuit characteristic of the small dual-polarized ultra-wideband antenna array based on the aircraft carrier platform is shown in fig. 6, and the figure shows that the average voltage standing wave ratio of two polarized ports reaches a working state in the range of 2GHz to 5GHz, and the consistency of the two polarized ports is good; the polarized port isolation is greater than about 30dB.
Fig. 7 to 12 show the radiation pattern simulation results of two polarized ports at the operating frequency points of 2GHz, 3GHz, 4GHz, and 5GHz, respectively, and a three-dimensional gain pattern, a three-dimensional axial ratio pattern, a gain pattern at xoz plane, an axial ratio pattern at xoz plane, a gain pattern at yoz plane, and an axial ratio pattern at yoz plane are respectively given in each polarized port of each frequency point. It can be seen that under the condition of reduced size, the antenna array has acceptable radiation performance at low frequency, and the voltage standing wave ratio of the two polarized ports is improved to a certain extent; at high frequencies, the radiation performance and the voltage standing wave ratio performance of the antenna are basically maintained; the antenna system can normally work in the whole working frequency band, so that the performance requirement of the radar system on the antenna is met
In summary, the invention provides a design scheme and an antenna structure device of a small dual-polarized ultra-wideband antenna based on an aircraft carrier platform, wherein an antenna unit in the device adopts an open boundary type small ultra-wideband four-ridge horn antenna type, a circular antenna array with uniform layout is designed for a circular antenna mounting platform, the influence of a microwave wave absorbing material and a metal isolation wall loading mode on the ultra-wideband antenna array by the metal carrier platform is reduced, meanwhile, electromagnetic coupling among array antenna units is reduced, and the radiation pattern performance of an array antenna is improved.
In the design of a small dual-polarized ultra-wideband antenna, the invention adopts a four-ridge horn antenna structure with an open boundary, and improves the voltage standing wave ratio and the radiation performance of the low frequency band of the dual-polarized horn antenna by carrying out structural deformation treatment on a feed square waveguide cavity and loading wave absorbing materials at the bottom of the cavity, and improves the radiation pattern performance of the antenna by loading a medium structure in the middle part of four metal ridges. In the array design of a small dual-polarization ultra-wideband antenna, a circular ultra-wideband array structure with uniform layout is adopted aiming at the disc-shaped antenna installation space on an aircraft carrier platform, under the condition of miniaturization treatment, the electromagnetic coupling between antenna units is increased, so that the influence of a metal platform on the radiation performance of the antenna is reduced, and meanwhile, the coupling between the units is reduced.
Based on the shape of the antenna array, the circular microwave absorbing material is loaded on the whole antenna array, and meanwhile, the metal isolation wall structure is loaded on the edge of the circular microwave absorbing material, and the radiation pattern of the antenna is improved through the arrangement of the electromagnetic boundary of the antenna array; under the condition of considering the active and passive composite antennas, the microwave absorbing material and the metal isolation wall structure can also improve the isolation characteristic between the active and passive antennas.
Claims (4)
1. A small-sized dual-polarization ultra-wideband array antenna device based on an aircraft carrier is characterized in that the antenna device is provided with an aircraft carrier platform, an antenna installation space on the aircraft carrier platform is of a disc-shaped metal structure, a plurality of uniformly distributed antenna units are adopted on the carrier platform to form an ultra-wideband dual-polarization antenna array, and annular microwave absorbing materials are loaded in the space of the circular antenna arrayThe inner radius and the outer radius of the circular ring-shaped microwave absorbing material are respectively R 1 And R is 2 The height of the loaded circular ring-shaped microwave absorbing material is h_absorber; metal conductor isolation walls are loaded on the inner edge and the outer edge of the annular microwave absorbing material, the height of each metal conductor isolation wall is also h_absorber, the thickness of each metal conductor isolation wall is t_wall, and the metal conductor isolation walls can improve isolation between groups of passive radar antennas; cutting a cavity with a radius of r_hole in the microwave absorbing material at the position of each antenna unit for placing the ultra-wideband dual-polarized antenna units, so as to realize reasonable layout of the antenna units and the microwave absorbing material;
each antenna unit is internally provided with an ultra-wideband open boundary dual-polarized horn antenna radiator which comprises four metal ridges, a metal reflecting floor, a metal resonant cavity and a coaxial line port and a probe, wherein the four metal ridges are arranged in a central symmetry mode, the metal reflecting floor is loaded with microwave absorbing materials, the metal resonant cavity is used for feeding, the coaxial line port is used for feeding, the metal ridges are in an exponential curve shape, and in a ridge horn section, a ridge curve adopts an exponential curve form: y (x) =ae kx +cx+c 3 (1) Wherein: 0 < x < L, L is the height of the horn antenna, x is the central axis coordinate of the horn antenna, a, c 3 The values are undetermined coefficients respectively, and are determined according to the required size of the mouth surface of the horn antenna.
2. A compact dual polarized ultra wideband array antenna apparatus based on an aircraft carrier as claimed in claim 1, characterized by the width a of the feed resonant cavity of the horn antenna radiator in the antenna element 2 The length is h_cavity, in order to improve the impedance matching effect of the horn antenna, reduce the voltage standing wave ratio of the low frequency band, the resonant cavity feed part of the antenna adopts a ladder-shaped structure, and in the design of the metal cavity feed structure, the parameter f is adjusted 1 、f 2 、f 3 、g 1 And g 2 The input impedance of the pattern of the four-ridge horn antenna is adjusted.
3. A compact dual polarized ultra wideband array antenna apparatus based on an aircraft carrier as claimed in claim 1, characterized byThe bottom of the metal reflecting cavity is filled with microwave absorbing material with thickness t absorber The method has the effects of reducing the voltage standing wave ratio at the low frequency of the ultra-wideband antenna, improving the matching performance, regulating and controlling the radiation pattern of the antenna, and determining the electromagnetic parameters and the height of the microwave absorbing material by a full-wave electromagnetic simulation method.
4. The invention relates to a small dual-polarized ultra-wideband array antenna device based on an aircraft carrier, which is characterized in that in order to improve the radiation pattern of the dual-polarized ultra-wideband antenna, a local dielectric loading mode is adopted, a loaded dielectric block is positioned in the central area of the mouth surface of the antenna, namely in the center of four metal ridges, the loaded dielectric block can change local equivalent dielectric constants, regulate and control electromagnetic field distribution on the aperture of the antenna, further improve the shape of the radiation pattern, widen the beam width, expand the working bandwidth of a four-ridge horn feed source and adjust the parameter x 1 、x 2 、x 3 、x 4 、y 1 And y 3 By adjusting the pattern of the four-ridge horn antenna loaded by the medium, it can be seen that the shape of the medium block is also a horn-like main body which is gradually unfolded along with the shape of the four metal ridges, wherein the relative dielectric constant of the medium block is also an important design parameter which has a great influence on the radiation performance of the antenna, and the parameter x is that 1 、x 2 、x 3 、x 4 、y 1 、y 3 And the relative dielectric constant of the dielectric block is determined by a full wave electromagnetic simulation method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651591.XA CN116191054A (en) | 2022-12-22 | 2022-12-22 | Small-sized dual-polarization ultra-wideband array antenna device based on aircraft carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651591.XA CN116191054A (en) | 2022-12-22 | 2022-12-22 | Small-sized dual-polarization ultra-wideband array antenna device based on aircraft carrier |
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| Publication Number | Publication Date |
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| CN116191054A true CN116191054A (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211651591.XA Pending CN116191054A (en) | 2022-12-22 | 2022-12-22 | Small-sized dual-polarization ultra-wideband array antenna device based on aircraft carrier |
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| Country | Link |
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| CN (1) | CN116191054A (en) |
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2022
- 2022-12-22 CN CN202211651591.XA patent/CN116191054A/en active Pending
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