CN114156665A - Broadband circularly polarized transmission array antenna based on dielectric structure - Google Patents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
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Abstract
The invention discloses a broadband circularly polarized transmission array antenna based on a dielectric structure. The transmission array antenna comprises a transmission array surface and a feed source; wherein, the transmission array front comprises 8, a plurality of array front units which are arranged in a linear form and have different sizes; the feed source is a broadband linear polarization antenna; the feed source is positioned on the central axis of the transmission array surface, vertically irradiates the transmission array surface, and forms a 45-degree included angle with the transmission array surface in the horizontal direction. The invention adopts a full-medium structure and provides a broadband circularly polarized transmission array antenna design. In principle, the antenna is a circularly polarized antenna in a traveling wave form, and is not limited by a resonance principle in the traditional design, so that the antenna has a wider axial ratio bandwidth, and the bandwidth can reach 51.8 percent, which is far superior to the current technical level. In addition, the antenna has stable performance in the working frequency band and has the characteristic of high gain.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a broadband circularly polarized transmission array antenna based on a dielectric structure.
Background
In recent years, with the continuous development of wireless communication technology, circularly polarized transmission array antennas have received extensive attention from both academic and industrial fields. The antenna generally has the advantages of high directionality, high gain, interference resistance, multipath effect resistance and polarization mismatch avoidance to a certain extent, and is widely applied to the fields of satellite communication, navigation positioning, mobile communication and the like. In practical applications, a broadband antenna generally has the advantages of large communication capacity, high transmission rate, high spectrum utilization rate, and the like, so that a broadband circularly polarized transmission array antenna is an important research direction.
In order to realize a circularly polarized transmission array antenna, two conditions need to be met for an array unit: 1. the two orthogonal electric field components of the electromagnetic wave need to have equal amplitude and 90-degree phase difference, so that the circular polarization characteristic is met; 2. the units need to have the phase shifting capability so as to compensate the phase difference of the electromagnetic waves from the feed source to different units, thereby realizing the wave front similar to plane waves and further realizing the high gain characteristic. In particular, the cell needs to perform phase compensation on two orthogonal electric field components simultaneously.
At present, most of common circularly polarized transmission array antennas adopt a multilayer PCB structure, and the specific scheme is as follows: literature (L. Di Palma, A. clement, L. Dussopt, R. Sauleau, P. Potier and P. Pouliguen, "circular polarized transmitted with sequential rotation in Ka-band,") "IEEE Trans. Antennas Propag.Vol. 63, No. 11, pp. 5118-5124, nov. 2015.) to implement broadband circular polarization by using four-element subarrays fed by sequence, and implementing phase compensation by changing the relative angle between the upper and lower metal patches; literature (J. Yang et al, "Folded transmitted anti-cancer with circular polarization based on measurement"IEEE Trans. Antennas Propag.Vol. 69, No. 2, pp. 806, 814, feb, 2021) adopts a double-layer unit with a metamaterial structure, and realizes circularly polarized radiation by using U-shaped slots and cut angles, and realizes different phase compensation by rotating the unit; literature (C, Tian, Y, Jiano and G, ZHao, "circular polarized transmitted encoded low-profile dual-linear polarized elements,") "IEEE Antennas Wireless Propag. Lett., vol. 16, pp. 465-468, 2017.) and (J. Yu, L. Chen and X. Shi, "A multimedia diode-type elements for circular polarized transmitted applications"IEEE Antennas Wireless Propag. Lett. Vol 15, pp. 1877-. Most of the existing circularly polarized transmission array antenna schemes have the defect of relatively narrow axial ratio bandwidth, which is caused by the fact that most of designs rely on metal structures and the working principle is based on the resonance principle, the relatively wide axial ratio bandwidth which can be realized by the related antennas reported at present is generally about 20%, and the defect of insufficient axial ratio bandwidth exists in broadband communication application.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a broadband circularly polarized transmission array antenna based on a dielectric structure, and compared with the traditional scheme, the axial ratio bandwidth of the antenna is further improved.
The purpose of the invention is realized by at least one of the following technical solutions.
A broadband circularly polarized transmission array antenna based on a dielectric structure comprises a transmission array surface and a feed source;
wherein, the transmission array front comprises 8, a plurality of array front units which are arranged in a linear form and have different sizes; the feed source is a broadband linear polarization antenna;
the feed source is positioned on the central axis of the transmission array surface, vertically irradiates the transmission array surface, and forms a 45-degree included angle with the transmission array surface in the horizontal direction.
Furthermore, the array surface unit comprises a medium block, a supporting structure and a matching structure which are sequentially connected from top to bottom;
the dielectric block, the supporting structure and the matching structure are all cuboids, a cuboid slot is formed in the middle line position of the dielectric block, the height and the width of the slot are respectively the same as those of the dielectric block, and the slot is w in thickness;
in the transmission array surface, adjacent array surface units are connected with each other through a supporting structure, and the whole transmission array surface is integrally formed during processing.
Furthermore, the array surface unit is of an anisotropic structure and has different structural characteristics in the x direction and the y direction, the electromagnetic wave has different propagation constants in the x direction and the y direction when propagating in the array surface unit, and after a certain distance, the phase difference of 90 degrees can be realized by two components of the electromagnetic wave in the x direction and the y direction, so that circular polarization radiation is realized;
the rectangular coordinate system is defined as follows: the XY plane is parallel to the supporting structure, the X axis points to the thickness w direction of the groove of the dielectric block, the Y axis points to the width direction of the dielectric block, the Z axis points to the propagation direction of the electromagnetic wave, and the origin of coordinates is located at the central point of the radiation aperture of the feed source.
Furthermore, each wavefront unit is scanned by a full-wave simulation software, so that the thickness value of the 90-degree phase difference between the two components of the electromagnetic wave in the x direction and the y direction of the wavefront unit is the middle slotting thickness w of the dielectric block.
Furthermore, in the array surface unit, the different heights h of the dielectric blocks enable the electromagnetic waves to obtain different phase delays when the electromagnetic waves exit from the transmission array surface, so that the phase shifting function is realized; the phase shift size required by each array surface unit is determined by the principle of equal optical path difference in optics;
similar to the traditional prism design, the electromagnetic wave radiated by the feed source has the wave front of a plane wave after passing through the transmission array surface, so that high-gain radiation is realized; the magnitude of the phase shift required for each wavefront unit is specifically as follows:
wherein，xAndyrespectively representing the coordinates of a point on the transmissive array surface in the x-direction and the y-direction,frepresenting the focal length of the transmissive array plane,λwhich represents the wavelength in free space, is,φ 0 represents an arbitrary initial phase;
indicating points
The phase shift magnitude is the phase shift magnitude required by each array surface unit;
after the phase shift magnitude required by each wavefront unit (13) is determined, the height of each wavefront unit (13) is respectively subjected to parameter scanning by full-wave simulation software, so that the electromagnetic wave emitted by the wavefront unit (13) obtains the required phase shift magnitude
The corresponding height value is the height h of the dielectric block (21) of the array surface unit (13).
Further, the size of the array surface unit along the x direction and the y direction is 0.6 times of the wavelength, and in order to realize compact transmission array design as much as possible, the size is the optimized minimum unit size.
Further, the transmissive array front is made entirely of a dielectric material.
Further, the transmissive array may be realized by a 3D printing process, a CNC process or an injection molding process.
Furthermore, the feed source adopts a broadband linearly polarized double-ridged horn antenna, and the working frequency band is 6-18 GHz.
Furthermore, the ratio of the focal length between the feed source and the transmission array surface to the maximum aperture size of the transmission array surface, namely a focal length ratio parameter, is between 0.6 and 0.8.
Compared with the prior art, the invention has the advantages that:
the invention adopts a full-medium structure and provides a broadband circularly polarized transmission array antenna design. In principle, the antenna is a circularly polarized antenna in a traveling wave form, and is not limited by a resonance principle in the traditional design, so that the antenna has a wider axial ratio bandwidth, and the bandwidth can reach 51.8 percent, which is far superior to the current technical level. In addition, the antenna has stable performance in the working frequency band and has the characteristic of high gain.
Drawings
Fig. 1 is a schematic diagram of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 2 is a full view of a unit of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 3 is a side view of a unit of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of impedance matching characteristics of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 5 is a schematic axial ratio characteristic diagram of a broadband circularly polarized transmission array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 6 is a central frequency xz plane directional diagram of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 7 is a central frequency yz plane directional diagram of a broadband circular polarization transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of gain characteristics of a broadband circularly polarized transmissive array antenna based on a dielectric structure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, technical solutions are set forth in conjunction with specific figures in order to provide a thorough understanding of the present invention. This application is capable of embodiments in many different forms than those described herein and it is intended that all such modifications that would occur to one skilled in the art are deemed to be within the scope of the invention.
Example (b):
a broadband circularly polarized transmission array antenna based on a dielectric structure is shown in figure 1 and comprises a transmission array surface 11 and a feed source 12;
wherein, the transmission array front 11 comprises 8, a plurality of array front units 13 which are arranged in a linear form and have different sizes; the feed source 12 is a broadband linear polarization antenna;
the feed source 12 is positioned on the central axis of the transmission array surface 11, vertically irradiates the transmission array surface 11, and forms an angle of 45 degrees with the transmission array surface 11 in the horizontal direction.
Fig. 2 and 3 show a full view and a side view, respectively, of the front unit 13, the front unit 13 comprising a dielectric block 21, a support structure 22 and a matching structure 23 connected in sequence from top to bottom;
the dielectric block 21, the supporting structure 22 and the matching structure 23 are all cuboids, a cuboid slot is arranged at the middle line position of the dielectric block 21, the height and the width of the slot are respectively the same as those of the dielectric block 21, and the slot thickness is w;
in the transmissive array 11, adjacent array elements 13 are connected to each other by the support structure 22, and the entire transmissive array 11 is integrally formed during processing.
As shown in fig. 2, the wavefront unit 13 is an anisotropic structure, and has different structural features in the x direction and the y direction, and when the electromagnetic wave propagates therein, the propagation constants in the x direction and the y direction are different, and after a certain distance, the phase difference of 90 degrees can be realized between the two components of the electromagnetic wave in the x direction and the y direction, so as to realize circular polarization radiation;
the rectangular coordinate system is defined as follows: the XY plane is parallel to the supporting structure 22, the X axis points to the direction of the thickness w of the groove of the dielectric block 21, the Y axis points to the width direction of the dielectric block 21, the Z axis points to the propagation direction of electromagnetic waves, and the origin of coordinates is located at the central point of the radiation aperture of the feed source 12.
In this embodiment, full-wave simulation software Ansys HFSS is used to perform parameter scanning on each wavefront unit 13, so that the thickness value of the 90-degree phase difference between the two components of the electromagnetic wave in the x direction and the y direction of the wavefront unit 13 is the middle slot thickness w of the dielectric block 21.
In the wavefront unit 13, the different heights h of the dielectric blocks 21 make the electromagnetic wave obtain different phase delays when exiting from the transmission array wavefront 11, thereby realizing the phase shift function; the phase shift required by each wavefront unit 13 is determined by the principle of equal optical path difference in optics;
similar to the traditional prism design, the electromagnetic wave radiated by the feed source 12 has the wave front of a plane wave after passing through the transmission array surface 11, so that high-gain radiation is realized; the magnitude of the phase shift required for each wavefront unit 13 is specifically as follows:
wherein，xAndyrespectively representing the coordinates of a point on the transmissive array 11 in the x-direction and the y-direction,findicating the focal length of the transmissive array face 11,λwhich represents the wavelength in free space, is,φ 0 represents an arbitrary initial phase;
indicating points
The phase shift magnitude of the array face unit 13 is the required phase shift magnitude of each array face unit;
in this embodiment, after the phase shift magnitude required by each wavefront unit 13 is determined, the full-wave simulation software Ansys HFSS is used to perform parameter scanning on the height h of each wavefront unit 13, so that the height value corresponding to the phase shift required by the electromagnetic wave emitted from the wavefront unit 13 is the height h of the wavefront unit 13.
In this embodiment, the size of the wavefront unit 13 in the x direction and the y direction is 0.6 times of the wavelength, and in order to realize a compact transmission array design as much as possible, the size is the optimized minimum unit size.
In the present embodiment, the transmissive array face 11 is entirely made of a dielectric material. The dielectric material chosen has a relative dielectric constant of 2.9, a loss tangent of 0.01, and the transmissive array front 11 is achieved by a 3D printing process.
In this embodiment, the feed source 12 is a broadband linearly polarized double-ridged horn antenna, and the operating frequency band is 6-18 GHz.
Further, a ratio of the focal length between the feed source 12 and the transmission array surface 11 to the maximum aperture size of the transmission array surface 11, that is, a focal length ratio parameter, in this embodiment, the focal length ratio is selected to be 0.71, the focal length between the feed source 12 and the transmission array surface 11 is 115 mm, and the maximum aperture size of the transmission array surface 11 is 162 mm.
The number of the wavefront units 13 included in the transmissive array 11 can be flexibly adjusted, in this embodiment, 81 wavefront units 13 are adopted and arranged in a form of 9 × 9; in this embodiment, the phase distribution adopts a 3-bit scheme commonly used in the industry, that is, 0 to 360 ° is discretized into 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 °, and 315 °, and 8 kinds of wavefront units 13 with different sizes are designed accordingly, the height parameter h of the dielectric block 21 in the wavefront units 13 and the width parameter w of the slot in the dielectric block 21 can be calculated by full-wave simulation software, and specific values are shown in table 1.
In a specific design, the magnitude of the desired dephasing at each of the wavefront units 13 on the wavefront may be determined according to the principle of equal optical path differences, and when the desired dephasing values are in the intervals of [ -22.5 °, 22.5 ° ], [22.5 °, 67.5 ° ], [67.5 °, 112.5 ° ], [112.5 °, 157.5 ° ], [157.5 °, 202.5 °, 247.5 ° ], [247.5 °, 292.5 ° ], [292.5 °, 337.5 ° ] the wavefront units 13 of 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 °, 315 °, respectively, are used.
In terms of antenna performance, fig. 4 shows the impedance bandwidth of the antenna, and the antenna can achieve impedance matching lower than-15 dB in the frequency band range from 8 GHz to 15 GHz, which shows that the reflected wave is less and most of the energy is smoothly radiated to the atmosphere. The axial ratio performance is shown in fig. 5, the axial ratio is lower than 3dB in the frequency band range from 8.3 GHz to 14.1 GHz, and the axial ratio bandwidth is 51.8%. The antenna has circularly polarized radiation characteristics in a wide frequency band, and the bandwidth is far higher than the current technical level. Fig. 6 and 7 are directional diagrams of a center frequency 11ghz xz plane and a yz plane, respectively, and an antenna side lobe is lower than-18 dB, which shows that the transmissive array antenna can realize a focused beam and has a characteristic of low side lobe. As shown in FIG. 8, the maximum gain is 23.9 dBic and the gain fluctuation is + -1.55 dB in the operating band (8.3 GHz-14.1 GHz), which indicates that the antenna has stable in-band gain performance. In conclusion, the invention has the advantages of wide axial ratio bandwidth, high gain and stable radiation performance in the working frequency band.
Example 2:
a broadband circularly polarized transmission array antenna based on a dielectric structure is shown in figure 1 and comprises a transmission array surface 11 and a feed source 12;
wherein, the transmission array front 11 comprises 8, a plurality of array front units 13 which are arranged in a linear form and have different sizes; the feed source 12 is a broadband linear polarization antenna;
the feed source 12 is positioned on the central axis of the transmission array surface 11, vertically irradiates the transmission array surface 11, and forms an angle of 45 degrees with the transmission array surface 11 in the horizontal direction.
Fig. 2 and 3 show a full view and a side view, respectively, of the front unit 13, the front unit 13 comprising a dielectric block 21, a support structure 22 and a matching structure 23 connected in sequence from top to bottom;
the dielectric block 21, the supporting structure 22 and the matching structure 23 are all cuboids, a cuboid slot is arranged at the middle line position of the dielectric block 21, the height and the width of the slot are respectively the same as those of the dielectric block 21, and the slot thickness is w;
in the transmissive array 11, adjacent array elements 13 are connected to each other by the support structure 22, and the entire transmissive array 11 is integrally formed during processing.
The focal length-diameter ratio parameter of the transmission array antenna can be flexibly adjusted to adapt to application scenes with different section heights; in example 2, a focal length ratio of 0.6 was used, and the other parameters were the same as in example 1.
Example 3:
a broadband circularly polarized transmission array antenna based on a dielectric structure is shown in figure 1 and comprises a transmission array surface 11 and a feed source 12;
wherein, the transmission array front 11 comprises 8, a plurality of array front units 13 which are arranged in a linear form and have different sizes; the feed source 12 is a broadband linear polarization antenna;
the feed source 12 is positioned on the central axis of the transmission array surface 11, vertically irradiates the transmission array surface 11, and forms an angle of 45 degrees with the transmission array surface 11 in the horizontal direction.
Fig. 2 and 3 show a full view and a side view, respectively, of the front unit 13, the front unit 13 comprising a dielectric block 21, a support structure 22 and a matching structure 23 connected in sequence from top to bottom;
the dielectric block 21, the supporting structure 22 and the matching structure 23 are all cuboids, a cuboid slot is arranged at the middle line position of the dielectric block 21, the height and the width of the slot are respectively the same as those of the dielectric block 21, and the slot thickness is w;
in the transmissive array 11, adjacent array elements 13 are connected to each other by the support structure 22, and the entire transmissive array 11 is integrally formed during processing.
In example 3, a focal ratio of 0.8 was used, and the other parameters were the same as in example 1.
As shown in fig. 4 to 8, the antenna performance of the present invention is substantially unchanged under different focal length ratios, and still has significant broadband and high gain characteristics. In terms of axial ratio bandwidth, the axial ratio bandwidth of example 2 is 53.6% (8.2 GHz-14.1 GHz), and the axial ratio bandwidth of example 3 is 42.7% (8.9 GHz-13.6 GHz). In terms of gain, the in-band maximum gain of example 2 is 24.1 dBic and the in-band maximum gain of example 3 is 23.4 dBic.
The preferred embodiments of the present application disclosed above are intended only to aid in the understanding of the invention and the core concepts. For those skilled in the art, there may be variations in the specific application scenarios and implementation operations based on the concepts of the present invention, and the description should not be taken as a limitation of the present invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A broadband circularly polarized transmission array antenna based on a dielectric structure is characterized by comprising a transmission array surface (11) and a feed source (12);
wherein the transmission array front (11) comprises 8, a plurality of different sizes of array front units (13) which are arranged in a linear form; the feed source (12) is a broadband linear polarization antenna;
the feed source (12) is positioned on the central axis of the transmission array surface (11), vertically irradiates the transmission array surface (11), and forms a 45-degree included angle with the transmission array surface (11) in the horizontal direction.
2. The broadband circularly polarized transmissive array antenna based on the dielectric structure as claimed in claim 1, wherein the front unit (13) comprises a dielectric block (21), a supporting structure (22) and a matching structure (23) connected in sequence from top to bottom;
the dielectric block (21), the supporting structure (22) and the matching structure (23) are all cuboids, a cuboid slot is formed in the middle line position of the dielectric block (21), the height and the width of the slot are respectively the same as those of the dielectric block (21), and the slot thickness is w;
in the transmission array surface (11), adjacent array surface units (13) are connected with each other through a supporting structure (22), and the whole transmission array surface (11) is integrally formed during processing.
3. The broadband circularly polarized transmission array antenna based on the dielectric structure as claimed in claim 2, wherein the array surface unit (13) is an anisotropic structure, and has different structural characteristics in the x direction and the y direction, the electromagnetic wave has different propagation constants in the x direction and the y direction when propagating therein, and after a certain distance, the two components of the electromagnetic wave in the x direction and the y direction can realize a phase difference of 90 degrees, thereby realizing circularly polarized radiation;
the rectangular coordinate system is defined as follows: the XY plane is parallel to the supporting structure (22), the X axis points to the direction of the slotting thickness w of the dielectric block (21), the Y axis points to the width direction of the dielectric block (21), the Z axis points to the electromagnetic wave propagation direction, and the origin of coordinates is located at the central point of the radiation aperture of the feed source (12).
4. The broadband circularly polarized transmission array antenna based on the dielectric structure as claimed in claim 2, wherein the full wave simulation software is used to perform parameter scanning on each wavefront unit (13) respectively, so that the thickness value of the phase difference of 90 degrees between the two components of the electromagnetic wave in the x direction and the y direction of the wavefront unit (13) is the middle slot thickness w of the dielectric block (21).
5. The broadband circularly polarized transmission array antenna based on the dielectric structure as claimed in claim 3, wherein in the array unit (13), the different heights h of the dielectric blocks (21) enable the electromagnetic waves to obtain different phase delays when the electromagnetic waves exit from the transmission array (11), thereby realizing the phase shifting function;
the phase shift size required by each wavefront unit (13) is determined by the principle of equal optical path difference in optics;
the electromagnetic wave radiated by the feed source (12) has the wave front of a plane wave after passing through the transmission array surface (11), so that high-gain radiation is realized; the magnitude of the phase shift required for each wavefront unit (13) is specifically as follows:
wherein，xAndyrespectively representing the coordinates of a point on the transmissive array surface (11) in the x-direction and the y-direction,frepresenting the focal length of the transmissive array surface (11),λwhich represents the wavelength in free space, is,φ 0 represents an arbitrary initial phase;
indicating points
The phase shift magnitude is the phase shift magnitude required by each array face unit (13);
after the phase shift magnitude required by each wavefront unit (13) is determined, the height of each wavefront unit (13) is respectively subjected to parameter scanning by full-wave simulation software, so that the electromagnetic wave emitted by the wavefront unit (13) obtains the required phase shift magnitude
The corresponding height value is the height h of the dielectric block (21) of the array surface unit (13).
6. A dielectric structure based broadband circularly polarized transmissive array antenna according to claim 3, characterized in that the size of the wavefront unit (13) in both x-direction and y-direction is 0.6 times wavelength.
7. A dielectric structure based broadband circularly polarized transmissive array antenna according to claim 1, characterized in that the transmissive array surface (11) is made entirely of dielectric material.
8. The dielectric structure-based broadband circular polarization transmissive array antenna as claimed in claim 1, wherein the transmissive array plane (11) can be implemented by a 3D printing process, a CNC process or an injection molding process.
9. The broadband circularly polarized transmission array antenna based on the dielectric structure as claimed in claim 1, wherein the feed source (12) is a broadband linearly polarized double-ridged horn antenna, and the working frequency band is 6-18 GHz.
10. The broadband circularly polarized transmissive array antenna based on the dielectric structure as claimed in any one of claims 1 to 9, wherein the ratio of the focal length between the feed source (12) and the transmissive array surface (11) to the maximum aperture size of the transmissive array surface (11) is a focal length ratio parameter, and the focal length ratio parameter is between 0.6 and 0.8.
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| CN115275598A (en) * | 2022-09-28 | 2022-11-01 | 深圳大学 | Broadband fan-shaped radiation beam antenna module with space sharp cutoff characteristic |
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| CN115275598A (en) * | 2022-09-28 | 2022-11-01 | 深圳大学 | Broadband fan-shaped radiation beam antenna module with space sharp cutoff characteristic |
| CN115275598B (en) * | 2022-09-28 | 2022-12-27 | 深圳大学 | Broadband fan-shaped radiation beam antenna module with space sharp cutoff characteristic |
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| CN114156665B (en) | 2022-06-10 |
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