CN113013638A - Broadband folding type plane reflection array antenna - Google Patents
Broadband folding type plane reflection array antenna Download PDFInfo
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- CN113013638A CN113013638A CN201911319991.9A CN201911319991A CN113013638A CN 113013638 A CN113013638 A CN 113013638A CN 201911319991 A CN201911319991 A CN 201911319991A CN 113013638 A CN113013638 A CN 113013638A
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- 230000010287 polarization Effects 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 230000010363 phase shift Effects 0.000 claims abstract description 15
- 238000013507 mapping Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 240000000073 Achillea millefolium Species 0.000 description 1
- 235000007754 Achillea millefolium Nutrition 0.000 description 1
- 241000607734 Yersinia <bacteria> Species 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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Abstract
The invention discloses a broadband folding type planar reflection array antenna, which comprises a dielectric substrate, a feed loudspeaker, a polarization grid and a large number of reflection units printed on the dielectric substrate, wherein the reflection units adopt a double-resonance structure and are composed of a Yelu cold cross patch arranged in the center and two pairs of rectangular patches arranged on the periphery, and the reflection units are provided with a flat phase shift curve and a phase shift range exceeding 450 degrees so as to realize the broadband performance of the antenna. The broadband folding type plane reflection array antenna has the advantages of simple structure, low profile and good mechanical stability, and gets rid of the shielding of a feed source and a support.
Description
Technical Field
The invention relates to the field of microwave and millimeter wave antennas, in particular to a broadband folding type planar reflection array antenna.
Technical Field
In recent years, with the continuous development of wireless communication technology, high gain antennas play an increasingly important role in the fields of satellite communication, deep space exploration, and long-distance communication. The traditional high-gain antenna mainly comprises a parabolic antenna and a planar phased array antenna, and although the parabolic antenna has the advantages of simple structure, wide frequency band, high gain and good directivity, the traditional high-gain antenna also has a plurality of defects. The curved surface structure inherent in the parabolic antenna results in an antenna that is bulky, inconvenient to install and transport, and places high demands on the machining accuracy, especially in the millimeter wave band. In addition, the parabolic antenna has a single function, and the beam design is not flexible. The planar phased array antenna is commonly used for beam scanning, and the amplitude and phase information excited on each array unit is controlled by regulating and controlling a feed network of the antenna, so that beam control of the antenna is realized. Because the phased array antenna feed network uses a large number of phase shifters and amplifiers, the complexity of the feed network is greatly increased along with the expansion of the array scale, so that the feed transmission loss is increased, and the overall radiation efficiency of the antenna is affected. In addition, the complicated feed network greatly increases the cost of the antenna.
The planar reflection array antenna is a novel antenna formed by combining the advantages of a parabolic antenna and a large-scale array antenna. Compared with a parabolic antenna, the planar reflection array antenna has the advantages that a curved surface structure is replaced by the planar reflection array surface, the size is small, the weight is light, the processing is easy, the cost is low, and the beam scanning is easy to realize; compared with a phased array antenna, the planar reflection array antenna adopts an air feed mode for feeding, a complex feed network is not needed, and the gain and the efficiency of the antenna are improved. As an important branch of the reflector array antenna, the folded reflector array reduces the height of the traditional reflector array antenna by half by using a polarization grid, and the feed source is installed below the reflector plate and is easier to integrate with the reflector plate, so that the shielding problem of the feed source and a support is overcome. Therefore, by virtue of the characteristics of low profile, convenience in processing, various function realization and the like, the folding type reflection array has great potential for being applied to a communication-in-motion system.
Disclosure of Invention
The invention aims to provide a broadband folding type planar reflection array antenna with wide frequency band and high gain.
The technical solution for realizing the purpose of the invention is as follows: a broadband folding planar reflection array antenna comprises a dielectric substrate, a feed horn, a polarization grid and a reflection unit printed on the dielectric substrate;
the reflection unit adopts a double-resonance type structure and consists of a Yelu cold cross patch arranged in the center and two pairs of rectangular patches arranged on the periphery; the feed horn is installed at the central gap of the dielectric substrate, the opening surface of the feed horn is flush with the upper surface of the dielectric substrate, and the polarization direction forms an included angle of 45 degrees relative to the arrangement direction of the reflection units.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the broadband performance is good: by adopting the double-resonant reflection unit, the phase curve is flat, the phase shift range is large and exceeds 360 degrees, and the phase curves of different frequency points are nearly parallel;
(2) the height of the section is low: reflecting incident waves by using a polarization grid, wherein the section of the incident waves is about half of that of a common reflective array antenna;
(3) shielding without a feed source and a bracket: the feed source horn is arranged below the medium substrate, and does not shield the wave beam;
(4) easy processing: and a single-layer medium substrate is adopted, so that the processing is easy and the manufacturing cost is low.
The invention is described in further detail below with reference to the figures and the detailed description.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a broadband folded planar reflectarray antenna of the present invention.
Fig. 2 is a schematic view of a reflection unit structure.
Fig. 3 is a structural view of an antenna reflect array panel.
Fig. 4 is a size diagram of the antenna reflection unit in the embodiment.
Fig. 5 is a size diagram of a polarization grid cell in an embodiment.
Fig. 6 is a graph of phase shift of the antenna reflection unit at each frequency point.
Fig. 7 is a schematic diagram of reflection and transmission coefficients of a polarizing grid cell.
Figure 8 is a normalized radiation pattern of a broadband circularly polarized planar reflectarray antenna.
Fig. 9 is a gain diagram of a broadband circularly polarized planar reflectarray antenna.
Detailed Description
As shown in fig. 1, a broadband folded planar reflection array antenna includes a dielectric substrate 1, a feed horn 2, a polarization grid 3, and a large number of reflection units 4 printed on the dielectric substrate 1;
as shown in fig. 2, the reflection unit 4 has a double-resonance structure, and is composed of a yerroad cold cross patch 5 arranged in the center and two pairs of rectangular patches 6 arranged on the periphery. The feed horn 2 is arranged at the central gap of the dielectric substrate 1, the opening surface of the horn is flush with the upper surface of the dielectric substrate, and the polarization direction forms an included angle of 45 degrees relative to the arrangement direction of the reflection units 4.
The reflecting units 4 are printed on the upper surface of the circular dielectric substrate 1 with the diameter of 90mm, a large number of reflecting units are arranged into an array, and the number of the units in each row gradually decreases from the middle to the two ends.
The reflection unit 4 is a double-resonance structure consisting of a Yelu cold cross patch 5 arranged in the center and two pairs of rectangular patches 6 arranged on the periphery, the Yelu cold cross patch provides one resonance point, and the rectangular patches on the periphery generate the other resonance point.
The change of the structural size of the reflecting unit 4 changes the reflecting phase of the unit, a one-to-one mapping relation exists between the reflecting phase of the unit and the size of the unit, and the mapping relation is fitted into a curve, which is called as a phase shift curve. The reflecting unit 4 has a flat phase shift curve with a phase shift range exceeding 450 deg..
The size change of the reflecting unit 4 in the x direction affects the reflection phase of the polarized incident wave in the x direction, the size variable in the y direction affects the reflection phase of the polarized incident wave in the y direction, and the mutual influence between the two orthogonal variables is small;
the reflecting unit 4 has different phases to be compensated according to different positions relative to the feed horn 3, and has different unit sizes obtained according to the mapping relation of the phase shift curve; and the size of each unit in the x direction is different from the size of each unit in the y direction, so that the reflection phase of each unit in the orthogonal direction is ensured to be different by 180 degrees, and polarization torsion is realized.
The feed horn 2 is a pyramid horn, the E-plane and H-plane directional pattern curves are kept consistent in a 3dB wave beam range, and the 3dB wave beam width reaches 90 degrees.
The polarization grid 3 is disposed above the reflection unit 4, and the polarization grid 3 can reflect the wave with the polarization direction along the direction of the grating bars and penetrate the wave perpendicular to the polarization direction.
The invention provides a folding reflection array antenna which adopts a novel single-layer double-resonant reflection unit, has a flat phase shift curve and a phase shift range exceeding 360 degrees, and has excellent broadband performance. In addition, the antenna adopts a single-layer dielectric substrate, and has the advantages of simple structure, easy processing and low cost.
The present invention will be described in detail with reference to examples.
Examples
As shown in fig. 1 and 2, a broadband folded planar reflection array antenna includes a dielectric substrate 1, a feed horn 2, a polarization grid 3, and a plurality of reflection units 4 printed on the dielectric substrate; the polarization grid 3 is arranged above the dielectric substrate in parallel, and the height H from the dielectric substrate is 25 mm. The feed horn 2 is arranged at a central gap of the dielectric substrate, electromagnetic waves emitted by the feed horn irradiate the polarization grid above the feed horn and are reflected to the dielectric substrate, and the electromagnetic waves are reflected into plane waves and are transmitted out of the polarization grid after being subjected to phase modulation and polarization torsion by a reflection unit on the dielectric substrate, so that high-gain and low-sidelobe pen-shaped beams are realized.
Fig. 3 shows a structural diagram of the antenna reflection array panel of the present invention, in which the dielectric substrate has a circular structure and a diameter of 90mm, and a large number of reflection units are printed on the upper surface and arranged in an array. In each row, the number of units in each column is gradually reduced from the middle to two ends; the center of the dielectric substrate is provided with a rectangular notch for mounting the feed source loudspeaker. The polarization direction of the horn is at an angle of 45 ° relative to the direction of the array of reflective elements.
FIG. 4 shows a dayThe line reflection unit 4 is a schematic structural diagram, and a double resonance unit is composed of a center placed yarrow cold cross patch and four surrounding rectangular patches. Printed on Rogers5880 substrate with thickness h of 1.575mm and relative dielectric constant epsilonr2.2. The unit side length L is 4.4 mm; the length parameters of the Y and X directions of the Y-shaped scattering cross patch are L1And L2End load patch length dx，dyIs 0.7 mm; the length of the rectangular patch in the x direction is LxAnd the patch length in the y direction is Ly(ii) a The widths w of the patches are all 0.2 mm; the distance from the center of the yersinia scattering cold cross patch to the center of the peripheral rectangular patches is 1.6 mm; length parameter L of jeldahl cross patch1And L2Length parameter L of rectangular patch aroundxAnd LyThe corresponding relation is as follows: l is1＝Lx+0.7mm，L2＝Ly+0.7 mm; the reflection phase of the unit in the x direction is determined by the variable LxThe reflection phase in the y direction is determined by the variable LyIt is decided that the isolation between the reflection phases in the two directions is good. The phase difference between the reflection phase in the x direction and the reflection phase in the y direction is adjusted by 180 degrees, and the polarization torsion is realized by 90 degrees.
FIG. 5 shows a diagram of a structure of a polarization grid cell with an array of grid bars printed at a thickness h11.575mm thick Rogers5880 base plate, grid width dsIs 0.15mm, at a spacing dc0.25 mm;
FIG. 6 shows the reflection phase and L of an incident wave in the x-axis polarization direction in the frequency range of 32GHz to 37GHzyThe relationship between them. The reflection phase and L can be seenxThe change of the phase shift is in a linear relation, the phase shift curve is smooth, and the phase shift range is large and can reach 450 degrees. Furthermore, the phase shift curves for different frequencies are approximately parallel, which ensures good performance of the reflectarray element over a broad frequency band.
Fig. 7 shows the reflection and transmission coefficients of the polarized grid cell, with the return loss of the incident wave linearly polarized along the grid being below 0.01dB, substantially totally reflected, and the return loss of the orthogonal polarization being below-10 dB over the frequency band of 30GHz to 40GHz, indicating that most of the energy is transmitted.
Fig. 8 is a normalized radiation pattern of the antenna at 31GHz, 35GHz and 39GHz operating frequencies using HFSS simulation software. It can be seen from the figure that the side lobe levels for all frequencies are below-18 dB, even below-23 dB at the centre frequency of 35 GHz. Furthermore, all cross-polarizations are below-20 dB.
Fig. 9 shows a gain diagram for a broadband folded planar reflective array antenna in the range of 30GHz to 40GHz, with the maximum gain achieved at 38GHz, reaching 28.4dB, and a 3dB gain bandwidth of 25.7% from 31GHz to 40 GHz.
Therefore, the folding plane reflection array antenna has the advantages of simple structure, easy processing, wide frequency band, high gain, low section and no shielding of a feed source and a bracket.
Claims (7)
1. A broadband folding planar reflection array antenna is characterized in that: the antenna comprises a dielectric substrate (1), a feed horn (2), a polarization grid (3) and a reflection unit (4) printed on the dielectric substrate (1);
the reflection unit (4) adopts a double-resonance type structure and consists of a Yelu cold cross patch (5) arranged in the center and two pairs of rectangular patches (6) arranged on the periphery; the feed horn (2) is arranged at the central gap of the dielectric substrate (1), the opening surface of the horn is flush with the upper surface of the dielectric substrate, and the polarization direction forms an included angle of 45 degrees relative to the arrangement direction of the reflection unit (4).
2. The broadband folded planar reflectarray antenna of claim 1, wherein: the reflecting units (4) are printed on the upper surface of the circular dielectric substrate (1), a plurality of reflecting units are arranged into an array, and the number of the units in each row gradually decreases from the middle to the two ends.
3. The broadband folded planar reflectarray antenna of claim 2, wherein: the diameter of the circular dielectric substrate (1) is 90 mm.
4. The broadband folded planar reflectarray antenna of claim 1, wherein: the reflecting unit (4) has different phases required to be compensated according to different positions relative to the feed horn (3), and has different unit sizes obtained according to the mapping relation of the phase shift curve; and the size of each unit in the x direction is different from the size of each unit in the y direction, so that the reflection phase of each unit in the orthogonal direction is ensured to be different by 180 degrees, and polarization torsion is realized.
5. The broadband folded planar reflectarray antenna of claim 1, wherein: the feed horn (2) is a pyramid horn.
6. The broadband folded planar reflectarray antenna of claim 1, wherein: the polarization grid (3) is arranged above the reflection unit (4).
7. The broadband folded planar reflectarray antenna of claim 6, wherein: the polarization grid (3) can reflect the wave with the polarization direction along the direction of the grid bars and penetrate the wave perpendicular to the polarization direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911319991.9A CN113013638A (en) | 2019-12-19 | 2019-12-19 | Broadband folding type plane reflection array antenna |
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| CN201911319991.9A CN113013638A (en) | 2019-12-19 | 2019-12-19 | Broadband folding type plane reflection array antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871855A (en) * | 2021-09-24 | 2021-12-31 | 正成卫星网络集团有限公司 | A satellite payload mechanical phased array antenna |
| CN115332816A (en) * | 2022-08-23 | 2022-11-11 | 南京理工大学 | Reflectarray Antenna Based on All-Metal Polarized Twisted Reflector Element |
| CN115347379A (en) * | 2022-10-19 | 2022-11-15 | 银河航天(西安)科技有限公司 | Antenna |
| CN115483541A (en) * | 2022-09-06 | 2022-12-16 | 中国工程物理研究院应用电子学研究所 | Ka-band high-power beam scanning array antenna based on polarization torsion |
| CN116365252A (en) * | 2023-03-14 | 2023-06-30 | 电子科技大学 | A Low-Profile Antenna Shared by Phased Array and Reflectarray Based on Structured Composite Surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109755757A (en) * | 2019-03-07 | 2019-05-14 | 西安电子科技大学 | Broadband coded folded reflectarray antenna based on subwavelength single-layer reflector |
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2019
- 2019-12-19 CN CN201911319991.9A patent/CN113013638A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755757A (en) * | 2019-03-07 | 2019-05-14 | 西安电子科技大学 | Broadband coded folded reflectarray antenna based on subwavelength single-layer reflector |
Non-Patent Citations (3)
| Title |
|---|
| GENG-BO WU ET AL: ""Broadband, Single-Layer Dual Circularly Polarized Reflectarrays With Linearly Polarized Feed"", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
| LU GUO ET AL: ""On the Use of Single-Layered Subwavelength Rectangular Patch Elements for Broadband Folded Reflectarrays"", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
| YONG SUN ET AL: ""Broadband Single-Layer Circularly Polarized Reflectarray Antenna at W Band"", 《2019 INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY (ICMMT)》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871855A (en) * | 2021-09-24 | 2021-12-31 | 正成卫星网络集团有限公司 | A satellite payload mechanical phased array antenna |
| CN115332816A (en) * | 2022-08-23 | 2022-11-11 | 南京理工大学 | Reflectarray Antenna Based on All-Metal Polarized Twisted Reflector Element |
| CN115483541A (en) * | 2022-09-06 | 2022-12-16 | 中国工程物理研究院应用电子学研究所 | Ka-band high-power beam scanning array antenna based on polarization torsion |
| CN115347379A (en) * | 2022-10-19 | 2022-11-15 | 银河航天(西安)科技有限公司 | Antenna |
| CN115347379B (en) * | 2022-10-19 | 2023-01-31 | 银河航天(西安)科技有限公司 | Antenna |
| CN116365252A (en) * | 2023-03-14 | 2023-06-30 | 电子科技大学 | A Low-Profile Antenna Shared by Phased Array and Reflectarray Based on Structured Composite Surface |
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