CN115173046A - All-metal double-frequency double-layer transmission array unit - Google Patents
All-metal double-frequency double-layer transmission array unit Download PDFInfo
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- CN115173046A CN115173046A CN202210790173.2A CN202210790173A CN115173046A CN 115173046 A CN115173046 A CN 115173046A CN 202210790173 A CN202210790173 A CN 202210790173A CN 115173046 A CN115173046 A CN 115173046A
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- 239000002184 metal Substances 0.000 title claims abstract description 97
- 230000005540 biological transmission Effects 0.000 title claims abstract description 72
- 239000000758 substrate Substances 0.000 claims abstract description 77
- 239000002355 dual-layer Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 7
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000010287 polarization Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
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Abstract
The invention provides an all-metal double-frequency double-layer transmission array unit which comprises two square metal substrates which are arranged up and down and are parallel to each other, wherein an asymmetric structure formed by two I-shaped grooves with different sizes is etched in the center of each metal substrate, two groups of rectangular grooves are etched at positions close to four corners, each group of rectangular grooves comprise an asymmetric structure formed by two rectangular grooves with different sizes, and the lower metal substrate is obtained by rotating 90 degrees relative to the upper metal substrate. When the lower metal substrate rotates 180 degrees relative to the lower metal substrate, an overturning electric field is formed to additionally provide 180-degree transmission phase change, the transmission amplitude of the double-frequency transmission array unit can be improved, and the double-frequency transmission array unit is free of support of the medium substrate, so that the transmission loss can be reduced, the cost can be reduced, and the adaptability to the environment can be improved.
Description
Technical Field
The invention belongs to the technical field of antennas, relates to a transmission array unit, and particularly relates to an all-metal double-frequency double-layer transmission array unit which can be used in the fields of space detection, microwave remote sensing and the like.
Background
The transmission array antenna combines the advantages of a parabolic antenna and an array antenna, has the advantages of low profile, small volume, easy processing and installation, low cost and the like, can meet the requirement of long-distance communication, and is widely applied to the fields of space detection and microwave remote sensing. In the field of satellite communication, antennas capable of operating in two or more frequency bands are often required, however, due to their own narrow-band characteristics, transmission array antennas cannot meet the design requirements of multiple frequency bands. In recent years, dual-band transmission array antennas have received attention from scholars in response to this problem. The design of the dual-frequency transmission array unit is one of the crucial steps in the design of the dual-frequency transmission array antenna. The transmission phase change of the dual-frequency transmission array unit under high transmission amplitude reaches 360 degrees, a transmission amplitude curve keeps a high linear state and good parallelism in a wider frequency band, and the transmission phase difference between each unit on the dual-frequency transmission array plane cannot change along with the frequency change, so that the dual-frequency transmission array antenna can realize broadband work in two working frequency bands.
The existing dual-frequency dual-layer transmission array unit needs to use a low-loss uniform microwave dielectric substrate in order to meet various high-performance requirements, and for large-aperture or high-frequency transmission array designs, these materials are very expensive, and for some antennas working in extremely severe environments, especially in the field of satellite communication, due to the influence of space radiation, the change of the dielectric substrate can bring about more serious influence on the performance of the antenna. For example, in the article "Double-layer Ku/K Dual-band orthogonal Polarized High-efficiency transmit array Antenna" published in the journal of IEEE Access, vol.9, pp.89143-89, jun.2021, the document "Dual-layer Ku/K Dual-band orthogonal Polarized High-efficiency transmit array" of m.cai, z.yan, f.fan, s.yang, and x.li, two band elements are formed by two resonant dipoles and four metal via posts connecting an upper patch and a lower patch and are Orthogonally arranged to realize Dual-band operation, and the upper multi-resonant dipole elements and the lower multi-resonant dipole elements are located at diagonal positions of the elements and are respectively printed on both sides of a dielectric substrate. The unit respectively obtains 360-degree phase change ranges at 14GHz and 21GHZ positions, meanwhile, the transmission amplitude is larger than-2 dB, although the transmission amplitude of the double-frequency transmission array unit is improved, the transmission amplitude is still not high enough due to the medium loss of the medium substrate, the influence of the performance of the medium substrate along with the environmental change is large, and the requirements of long-distance communication and various applicable environments cannot be met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an all-metal double-frequency double-layer transmission array unit which is used for solving the technical problems of low transmission amplitude and poor environment adaptability in the prior art.
In order to achieve the above purpose, the technical solution adopted by the present invention includes a square upper metal substrate 1 and a square lower metal substrate 2 which are arranged up and down and are parallel to each other, wherein:
a first I-shaped groove 11 and a second I-shaped groove 12 which are different in size are etched in the position, close to the center of the plate surface, of the upper metal substrate 1, a longitudinal groove on the first I-shaped groove 11 and a longitudinal groove on the second I-shaped groove 12 are equidistantly distributed on two sides of the center of the plate surface of the upper metal substrate 1 and are parallel to one group of opposite sides of the upper metal substrate 1, two transverse grooves on the first I-shaped groove 11 and two transverse grooves on the second I-shaped groove 12 are parallel to the other group of opposite sides of the upper metal substrate 1, a first rectangular groove 13 which is parallel to the longitudinal groove on the first I-shaped groove 11 is etched in the position, close to the two corners, of one side of the second I-shaped groove 12 in the upper metal substrate 1, a second rectangular groove 14 which is parallel to the longitudinal groove on the second I-shaped groove 12 is etched in the position, close to the two corners, of one side of the second I-shaped groove 12, and the length of the second rectangular groove 14 is greater than that of the first rectangular groove 13;
the lower metal substrate 2 is obtained by rotating the upper metal substrate 1 by 90 degrees around the central normal of the upper metal substrate; the center of the upper metal substrate 1 and the center of the lower metal substrate 2 are connected through metal through hole columns 3 respectively, and the corresponding positions of the four corners of the two metal substrates are connected through metal through hole columns 3 respectively.
In the above all-metal dual-frequency dual-layer transmission array unit, the width of the longitudinal groove and the width of the two transverse grooves on the first i-shaped groove 11 are equal, and the length L of the longitudinal groove 1 Length L of transverse groove 2 Satisfies the linear relation L 2 ＝K 1 *L 1 (ii) a The width of the longitudinal groove and the two transverse grooves on the second I-shaped groove 12 is equal, and the length L of the longitudinal groove 3 Length L of transverse groove 4 Satisfies the linear relation L 4 ＝K 1 *L 3 In which K is 1 Is a linear correlation coefficient, K 1 ＜1。
In the above all-metal dual-frequency dual-layer transmission array unit, the widths of the longitudinal groove and the two transverse grooves on the first i-shaped groove 11 and the second i-shaped groove 12 are equal, and the length L of the longitudinal groove on the second i-shaped groove 12 is equal to that of the longitudinal groove 3 The length L of the longitudinal groove on the first I-shaped groove 11 1 Satisfies the linear relation L 3 ＝K 2 *L 1 In which K is 2 Is a linear correlation coefficient, K 2 ＜1。
In the above all-metal dual-frequency dual-layer transmission array unit, the width of the first rectangular groove 13 is equal to the width of the second rectangular groove 14, and the length L of the first rectangular groove 13 5 And the length L of the second rectangular groove 14 6 Satisfies the linear relation L 6 ＝K 3 *L 5 In which K is 3 Is a linear correlation coefficient, K 3 ＜1。
In the above all-metal dual-frequency dual-layer transmission array unit, the width of the longitudinal groove and the width of the two transverse grooves on the first i-shaped groove 11 are equal, and the width of the two i-shaped grooves is greater than the width of the two rectangular grooves.
In the above all-metal dual-frequency dual-layer transmission array unit, the first i-shaped groove 11 and the second i-shaped groove 12 have their respective two transverse grooves mirror-symmetrical with respect to a central line parallel to the upper metal substrate 1.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, because the two square upper metal substrates which are arranged up and down and are parallel to each other do not need to be supported by the medium substrate, the medium loss caused by the higher relative dielectric constant of the medium substrate in the prior art is avoided, the transmission loss of the double-frequency transmission array unit is reduced, the transmission amplitude of the double-frequency transmission array unit is effectively improved, the influence of the external environment on the antenna can be better resisted by the full-metal double-layer structure, the requirement of longer-distance communication can be met, the defects of high cost and poor environment adaptability caused by the use of the medium substrate in the prior art are avoided, the cost can be reduced, and the environment adaptability can be improved.
2. The center positions of the upper metal substrate and the lower metal substrate are respectively etched with an asymmetric structure formed by two I-shaped grooves with different sizes, the positions close to four corners are respectively etched with two groups of rectangular grooves, each group of rectangular grooves comprises an asymmetric structure formed by two rectangular grooves with different sizes, the lower metal substrate is obtained by rotating the upper metal substrate by 90 degrees, when the lower metal substrate rotates 180 degrees relative to the lower metal substrate, the two types of asymmetric structures on each metal substrate form a reversed electric field to additionally provide 180-degree transmission phase change, the defect that the transmission phase curve is not smooth due to the fact that only size change is used for providing transmission phase change in the prior art is avoided, and the transmission amplitude of the dual-frequency transmission array unit is further improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of an upper metal substrate according to the present invention;
FIG. 3 is a transmission coefficient diagram at 8GHz and 14GHz according to an embodiment of the invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments:
referring to fig. 1, the invention includes a square upper metal substrate 1 and a square lower metal substrate 2 which are arranged up and down and are parallel to each other, and five metal through-hole pillars 3 connecting the two metal substrates; the metal substrate and the metal through hole columns are made of brass, the side length of the metal substrate is 19mm, and the diameters of the five metal through hole columns are 0.8mm. One of the metal through hole columns is arranged at the center of the upper metal substrate 1 and the lower metal substrate 2, and the other four metal through hole columns are arranged around the upper metal substrate 1 and the lower metal substrate 2, so that the metal through hole columns not only can enhance the coupling between the two layers of metal substrates, but also can be used as supporting gaskets, the developed materials are easy to assemble, and the metal through hole columns have high alignment accuracy and good mechanical strength.
The lower metal substrate 2 is obtained by rotating the upper metal substrate 1 by 90 degrees, the central positions of the upper metal substrate and the lower metal substrate are etched with asymmetric structures formed by two I-shaped grooves with different sizes, two groups of rectangular grooves are etched at positions close to four corners, each group of rectangular grooves comprises asymmetric structures formed by two rectangular grooves with different sizes, and when the lower metal substrate rotates 180 degrees relative to the lower metal substrate, the two types of asymmetric structures on each metal substrate can form a turning electric field to additionally provide 180-degree transmission phase change.
Referring to fig. 2, a first i-shaped groove 11 and a second i-shaped groove 12 with different sizes are etched in a position, close to the center of the plate surface, of the upper metal substrate 1, a longitudinal groove on the first i-shaped groove 11 and a longitudinal groove on the second i-shaped groove 12 are equidistantly distributed on two sides of the center of the plate surface of the upper metal substrate 1 and are parallel to one group of opposite sides of the upper metal substrate 1, two transverse grooves on the first i-shaped groove 11 and two transverse grooves on the second i-shaped groove 12 are parallel to the other group of opposite sides of the upper metal substrate 1, and the first rectangular groove 13 and the second rectangular groove 14 around are etched in the center of the plate surface in order to be far away from the center of the plate surface, so that the two i-shaped grooves and the two rectangular grooves are prevented from mutual influence caused by working in the same polarization mode. The upper metal substrate 1 is etched with a first rectangular groove 13 parallel to the longitudinal groove on the first I-shaped groove 11 at the positions close to the two corners on one side of the first I-shaped groove 11, and etched with a second rectangular groove parallel to the longitudinal groove on the second I-shaped groove 12 at the positions close to the two corners on one side of the second I-shaped groove 12Rectangular groove 14, first I-shaped groove 11, the width of the vertical groove and two horizontal grooves on it is equal, and the width is 1.5mm, and the length L of vertical groove 1 Length L of transverse groove 2 Satisfies the linear relation L 2 ＝K 1 *L 1 (ii) a The width of the longitudinal groove and the two transverse grooves on the second I-shaped groove 12 is equal, and the length L of the longitudinal groove 3 Length L of transverse groove 4 Satisfies the linear relation L 4 ＝K 1 *L 3 In which K is 1 Is a linear correlation coefficient, K 1 < 1, this example L 1 ＝15～19mm,K 1 =0.45. The reason why the longitudinal grooves and the transverse grooves of the first i-shaped groove 11 and the second i-shaped groove 12 respectively satisfy the linear relationship is that the length of the i-shaped groove for controlling the size change is increased, so that the transmission phase change curve is smoother, and the transmission amplitude of the dual-frequency transmission array unit is improved. The widths of the longitudinal grooves and the two transverse grooves on the first H-shaped groove 11 and the second H-shaped groove 12 are equal, and the length L of the longitudinal groove on the second H-shaped groove 12 3 The length L of the longitudinal groove on the first I-shaped groove 11 1 Satisfies the linear relation L 3 ＝K 2 *L 1 In which K is 2 Coefficient of linear correlation, K 2 < 1, example K 2 =0.7. The width of the first rectangular groove 13 is equal to that of the second rectangular groove 14, the width is 1mm, and the length L of the first rectangular groove 13 5 And the length L of the second rectangular groove 14 6 Satisfies the linear relation L 6 ＝K 3 *L 5 In which K is 3 Is a linear correlation coefficient, K 3 < 1, this example L 5 ＝10.5～13mm，K 3 =0.75. The widths of the longitudinal groove and the two transverse grooves on the first H-shaped groove 11 are equal, and the widths of the two H-shaped grooves are greater than the widths of the two rectangular grooves.
The technical effects of the invention are further explained by combining simulation experiments as follows:
1. simulation conditions and contents:
the transmission coefficients at 8GHz and 14GHz in this example were simulated by using commercial simulation software HFSS — 18.0, and the results are shown in fig. 3 (a) and 3 (b).
2. And (3) simulation result analysis:
referring to fig. 3, the left ordinate represents transmission amplitude and the right ordinate represents transmission phase; the abscissa in FIG. 3 (a) represents the longitudinal groove length L in the first I-shaped groove 11 1 The abscissa in FIG. 3 (b) represents the length L of the first rectangular groove 13 5 。
FIG. 3 (a) at 8GHz, a 180 ° phase change is achieved at transmission amplitudes greater than-1.5 dB, another 180 ° change is provided by rotating the lower metal substrate 180 °, and at L 1 When different values are taken, the transmission amplitude and the transmission phase are not affected basically, namely, the invention realizes the phase change of 360 degrees when the transmission amplitude is larger than-1.5 dB, and effectively improves the transmission amplitude of the double-frequency transmission array unit compared with the phase change of 360 degrees when the transmission amplitude is larger than-2 dB in the prior art at 14 GHz.
FIG. 3 (b) at 14GHz, a 180 ° phase change is achieved at transmission amplitudes greater than-1.5 dB, and another 180 ° change is provided by rotating the lower metal substrate 180 °, and at L 5 When different values are taken, the transmission amplitude and the transmission phase are not affected basically, namely, the invention realizes the 360-degree phase change when the transmission amplitude is greater than-1.5 dB, and effectively improves the transmission amplitude of the double-frequency transmission array unit compared with the prior art which realizes the 360-degree phase change when the transmission amplitude is greater than-2 dB at 21 GHz.
While the foregoing is directed to embodiments of the present invention and not to any limitations thereof, it will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a double-deck transmission array unit of dual-frenquency of all metal which characterized in that, metal substrate (2) under metal substrate (1) and the square on metal substrate (2) that just are parallel to each other including arranging from top to bottom, wherein:
the upper metal substrate (1) is etched with a first I-shaped groove (11) and a second I-shaped groove (12) which are different in size and are positioned close to the center of the plate surface, the longitudinal grooves on the first I-shaped groove (11) and the longitudinal grooves on the second I-shaped groove (12) are equidistantly distributed on two sides of the center of the plate surface of the upper metal substrate (1) and are parallel to one group of opposite sides of the upper metal substrate (1), two transverse grooves on the first I-shaped groove (11) and two transverse grooves on the second I-shaped groove (12) are parallel to the other group of opposite sides of the upper metal substrate (1), a first rectangular groove (13) which is parallel to the longitudinal groove on the first I-shaped groove (11) is etched on one side of the upper metal substrate (1) close to two corners, a second rectangular groove (14) which is parallel to the longitudinal groove on the second I-shaped groove (12) is etched on one side of the second I-shaped groove (12) close to two corners, and the length of the second rectangular groove (14) is greater than the length of the first rectangular groove (13);
the lower metal substrate (2) is obtained by rotating the upper metal substrate (1) by 90 degrees around the central normal of the upper metal substrate; the center of the upper metal substrate (1) is connected with the center of the lower metal substrate (2) through metal through hole columns (3) respectively, and the corresponding positions of the four corners of the two metal substrates are connected through metal through hole columns (3).
2. An all-metal dual-frequency dual-layer transmission array unit as claimed in claim 1, wherein the first I-shaped slot (11) has a longitudinal slot and two transverse slots with equal width, and the length L of the longitudinal slot 1 Length L of transverse groove 2 Satisfies the linear relation L 2 ＝K 1 *L 1 (ii) a The width of the longitudinal groove and the width of the two transverse grooves on the second I-shaped groove (12) are equal, and the length L of the longitudinal groove 3 Length L of transverse groove 4 Satisfies the linear relation L 4 ＝K 1 *L 3 In which K is 1 Is a linear phaseCoefficient of correlation, K 1 ＜1。
3. The all-metal dual-band dual-layer transmission array unit according to claim 2, wherein the widths of the longitudinal slot and the two transverse slots of the first I-shaped slot (11) and the second I-shaped slot (12) are equal, and the length L of the longitudinal slot of the second I-shaped slot (12) is equal to that of the transverse slot 3 The length L of the longitudinal groove on the first I-shaped groove (11) 1 Satisfies the linear relation L 3 ＝K 2 *L 1 In which K is 2 Is a linear correlation coefficient, K 2 ＜1。
4. An all-metal dual-band dual-layer transmission array unit as claimed in claim 3, wherein the width of the first rectangular slot (13) is equal to the width of the second rectangular slot (14), and the length L of the first rectangular slot (13) 5 And the length L of the second rectangular groove 14 6 Satisfies the linear relation L 6 ＝K 3 *L 5 In which K is 3 Is a linear correlation coefficient, K 3 ＜1。
5. An all-metal dual-frequency dual-layer transmission array unit as claimed in claim 4, wherein the width of the longitudinal slot and the width of the two transverse slots of the first I-shaped slot (11) are equal, and the width of the two I-shaped slots is greater than the width of the two rectangular slots.
6. An all-metal dual-band double-layer transmission array unit as claimed in claim 1, wherein the first I-shaped slot (11) and the second I-shaped slot (12) have two transverse slots mirror-symmetrical with respect to a central line parallel to the upper metal substrate (1).
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| CN202210790173.2A CN115173046A (en) | 2022-07-05 | 2022-07-05 | All-metal double-frequency double-layer transmission array unit |
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| CN202210790173.2A CN115173046A (en) | 2022-07-05 | 2022-07-05 | All-metal double-frequency double-layer transmission array unit |
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2022
- 2022-07-05 CN CN202210790173.2A patent/CN115173046A/en active Pending
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