CN116914443B - Dual-frequency beam scanning transmission array antenna - Google Patents
Dual-frequency beam scanning transmission array antenna Download PDFInfo
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- CN116914443B CN116914443B CN202311181609.9A CN202311181609A CN116914443B CN 116914443 B CN116914443 B CN 116914443B CN 202311181609 A CN202311181609 A CN 202311181609A CN 116914443 B CN116914443 B CN 116914443B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 171
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 17
- 230000006854 communication Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 9
- 238000003491 array Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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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
- H01Q19/06—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 refracting or diffracting devices, e.g. lens
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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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- 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
- H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material
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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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a dual-frequency beam scanning transmission array antenna, which comprises a transmission array and a feed source antenna, wherein the transmission array comprises two lenses, and the two lenses are coaxial with the feed source antenna; the lens comprises a lens layer, wherein the lens layer comprises a substrate and a patch layer attached to the substrate, the patch layer comprises a plurality of transmission units, and the plurality of transmission units comprise a plurality of high-frequency transmission units and a plurality of low-frequency transmission units; the high-frequency transmission units are arranged in a matrix of M rows and N columns, the low-frequency transmission units are arranged in a matrix of (M-1) rows and (N-1) columns, and the low-frequency transmission units and the high-frequency transmission units are staggered at intervals; one of the two lenses is a fixed lens, and the other is a rotatable movable lens. The dual-frequency beam scanning transmission array antenna has smaller gain loss and wider scanning angle.
Description
Technical Field
The invention relates to a transmission array antenna, in particular to a dual-frequency beam scanning transmission array antenna.
Background
For the next generation wireless communication system, not only base station communication between the ground but also air-to-ground integrated communication process has become a necessary trend, wherein 6G technology plays an indispensable role in this process. Compared with communication in Ka wave band, ku wave band and the like with lower frequency, 6GTHz communication attracts much attention because of the advantages of broadband, high gain, small size and the like. In recent years, many high gain and beam scanning antennas based on super surfaces have emerged. Meanwhile, the focusing antenna plays an important role in point-to-point applications such as near field communication, wireless energy transmission and the like, and various types of focusing antennas are rapidly developed. The antenna scanning function also becomes a crucial part of antenna development, and the antenna scanning can enable the antenna to scan as large a range as possible in a small frequency band, so that multi-angle and multi-area coverage is realized. Multiple azimuth scanning functions that can achieve multiple angles of the antenna are also attracting more and more attention.
The transmissive array antenna (Transmitarray Antenna) is a novel electromagnetic radiation antenna, which is an array of small transparent unit cells that control the radiation direction and beam width of electromagnetic waves by adjusting their phase and amplitude. Transmissive array antennas may be used in Radio Frequency (RF) and millimeter wave (mmWave) bands, commonly used in wireless communications, radar and satellite communications applications. Compared with the traditional antenna, the transmission array antenna has higher radiation efficiency and larger bandwidth, and is easier to integrate in a complex system. In addition, the low profile and lightweight design of transmissive array antennas is one of its advantages, which allows them to be widely used in a variety of space-limited scenarios, such as mobile devices and satellite communication systems.
Compared with a reflective array antenna, the transmissive array antenna has no feed source shielding problem, and can better transmit required information. The traditional transmission array beam scanning antenna mostly realizes the scanning function based on the relative rotation of the feed source structure, adjusts the relative position of the feed source and the corresponding relative phase in each frequency band, and superimposes the required phase through arithmetic average to realize the effect of multi-angle scanning. The space required for such feed antennas is large and sometimes scanning is not accurate enough.
Most of the current research on single-band high-gain transmission array antenna types can realize frequency bands and functions, so that THz transmission arrays generally need the antenna to have multi-band and multi-function characteristics. Therefore, it has become a necessary trend to design a dual-frequency dual-polarized beam scanning antenna meeting THz frequency band requirements.
The scanning gain loss of the traditional transmission array antenna is within 2-5 dB, the gain loss is reduced along with the increase of the scanning angle, and the scanning angle is narrower.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dual-frequency beam scanning transmission array antenna with smaller gain loss and wider scanning angle.
In order to solve the technical problems, the technical scheme adopted by the invention is that the dual-frequency beam scanning transmission array antenna comprises a transmission array and a feed source antenna, wherein the transmission array comprises two lenses, and the two lenses are coaxial with the feed source antenna; the lens comprises a lens layer, wherein the lens layer comprises a substrate and a patch layer attached to the substrate, the patch layer comprises a plurality of transmission units, and the plurality of transmission units comprise a plurality of high-frequency transmission units and a plurality of low-frequency transmission units; the high-frequency transmission units are arranged in a matrix of M rows and N columns, the low-frequency transmission units are arranged in a matrix of (M-1) rows and (N-1) columns, and the low-frequency transmission units and the high-frequency transmission units are staggered at intervals; one of the two lenses is a fixed lens, and the other is a rotatable movable lens.
The dual-frequency beam scanning transmission array antenna comprises a plurality of lens layers, wherein the plurality of lens layers are arranged layer by layer; the patch layer is a copper foil layer, and the copper foil layer of the lens layer faces the feed source antenna; an air gap is formed between the two lenses, and the center point of the low-frequency transmission unit is positioned at the intersection point of the diagonals of the adjacent 4 high-frequency transmission units; the substrate is round, and the matrix is a corner cutting matrix with four corners removed.
The dual-frequency beam scanning transmission array antenna is characterized in that the high-frequency transmission unit is in a five-star shape, the five-star-shaped high-frequency transmission unit comprises 5T-shaped branches, and the lower ends of the 5T-shaped branch vertical grooves are connected with each other; the transverse grooves of the 5T-shaped branches are concentric circular arcs; the low frequency transmission unit includes a circular groove and a cross groove disposed inside the circular groove.
The diameter of the high-frequency transmission unit is 0.38-0.43 times of the wavelength of the high-frequency band, and the inner diameter of the circular ring groove of the low-frequency transmission unit is 0.08-0.13 times of the wavelength of the low-frequency band.
The dual-frequency beam scanning transmission array antenna is characterized in that a fixed lens is close to a feed source antenna, and a movable lens is far away from the feed source antenna in the two lenses; the number of the lens layers is 4, the substrate is a Rogowski plate, the thickness of the substrate is 2mm, and the thickness of the air gap is 0.5mm; the distance between the caliber surface of the feed source antenna and the fixed lens is 18.85mm, and the focal length of the feed source antenna is 21.85mm; the row spacing of the high frequency transmissive element matrix is 1.15 mm, the column spacing is 1.15 mm, the row spacing of the low frequency transmissive element matrix is 1.15 mm, and the column spacing is 1.15 mm.
The dual-frequency beam scanning transmission array antenna is characterized in that the low frequency is 90GHz, and the high frequency is 140GHz.
The dual-frequency beam scanning transmission array antenna has the advantages that the outer diameter of the high-frequency transmission unit is 0.82-0.94 mm, and the width of the T-shaped branch vertical groove is 0.12mm; the width of the transverse groove is 0.10mm, and the central angle corresponding to the transverse groove is 55 degrees; the side edges at the two ends of the transverse groove are retracted, and the included angle is 90 degrees; the inner diameter of the circular ring groove of the low-frequency transmission unit is 0.28-0.44 mm, and the width of the circular ring groove is 0.1mm; the external diameter of the cross groove is 0.18-0.28 mm, and the groove width of the cross groove is 0.15mm.
The dual-frequency beam scanning transmission array antenna has the phase compensation value of the transmission unit；
Wherein,the compensation phase, k, of the transmission unit of the ith row and the jth column of the transmission array 0 Is the electromagnetic wave space propagation constant at the center frequency, +.>Is the distance from the feed source antenna to the transmission unit of the ith row and the jth column, L is the distance from the aperture plane of the feed source antenna to the center of the fixed lens, and +.>Is the initial phase value of the lens center cell.
The above-mentioned dual-frequency beam scanning transmission array antenna, deflection formula:；
wherein,is the phase compensation value of the transmission cell, +.>Is the propagation constant of electromagnetic wave in free space, L is the distance between the aperture plane of feed antenna and the center of fixed lens, < >>、/>And->Spatial coordinate values of the transmission units, respectively,>is the electromagnetic wave deflection angle which is customized. The dual-frequency beam scanning transmission array antenna has the advantages that the rotating range of the movable lens relative to the fixed lens is 0-90 degrees, and the scanning function of the transmission array antenna is realized through the relative rotation of the two lenses.
The beam scanning transmission array antenna does not rotate the feed source, and the scanning effect of two frequency bands is realized by rotating the movable lens. By utilizing the risley prism principle, the antenna can realize the same beam scanning effect in two wave bands through the relative rotation of the movable lens. The gain of the transmission array antenna in two frequency bands is improved by more than 10dB, the gain loss is within 2.5dB, and the beam scanning angle is wider, so that the transmission array antenna can be applied to a scene requiring multiple channels and multiple capacity channels.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a front view of a dual-frequency beam scanning transmissive array antenna in accordance with an embodiment of the present invention.
Fig. 2 is an enlarged view of part of the area i in fig. 1.
Fig. 3 is a top view of a transmissive array lens according to an embodiment of the present invention.
Fig. 4 is an enlarged view of a portion of a lens patch layer according to an embodiment of the invention.
Fig. 5 is a structural view of a high-frequency transmission unit according to an embodiment of the present invention.
Fig. 6 is a block diagram of a low frequency transmission unit according to an embodiment of the present invention.
Fig. 7 is a dimensional view of a high-frequency transmission unit according to an embodiment of the present invention.
Fig. 8 is a dimensional view of a low frequency transmission unit according to an embodiment of the present invention.
FIG. 9 is a graph of transmission coefficient and phase effects versus frequency for an embodiment of the present invention.
Fig. 10 is a graph showing the relationship between the size and the phase of the high-frequency transmission unit according to the embodiment of the present invention.
Fig. 11 is a graph showing the relationship between the size and the phase of the low-frequency transmission unit according to the embodiment of the present invention.
FIG. 12 is a graph showing the variation of scan angle with the rotation angle of two transmissive arrays at 90GHz according to an embodiment of the present invention.
FIG. 13 is a graph showing the variation of scan angle with the rotation angle of two transmissive arrays at 140GHz according to an embodiment of the present invention.
Detailed Description
The structure and principle of the dual-frequency beam scanning transmission array antenna in the embodiment of the invention are shown in fig. 1 to 13.
The dual-frequency beam scanning transmission array antenna comprises a transmission array 100 and a feed source antenna 200, wherein the transmission array comprises lenses 100A and 100B, the lens 100A is a fixed lens, and the lens 100B is a rotatable movable lens.
Lens 100A and lens 100B are arranged coaxially (Z-axis) with feed antenna 200, fixed lens 100A is close to feed antenna 200, movable lens 100B is far from feed antenna 200, and an air gap 300 is provided between lens 100A and lens 100B.
The lenses 100A and 100B are each composed of 4 coaxially stacked lens layers, each of which is composed of a substrate 10 and a patch layer 20 attached to the substrate 10, the patch layer 20 being a copper foil layer, the patch layer 20 (copper foil layer) of the lens layer being oriented toward the feed antenna 200.
On the patch layer 20 of each lens are 641 transmissive units, and 441 high-frequency transmissive units 30 and 200 low-frequency transmissive units 40 are included in the 641 transmissive units. The 441 high-frequency transmission units 30 are arranged in a matrix of 21 rows by 21 columns, the 400 low-frequency transmission units 40 are arranged in a matrix of 20 rows by 20 columns, the low-frequency transmission units 40 are arranged at staggered intervals with the high-frequency transmission units 30, and the center point of the low-frequency transmission unit 40 is located at the intersection of the diagonal 39 of the adjacent 4 high-frequency transmission units 30. The substrate 10 is circular, and the matrix of the high-frequency transmission units 30 is a corner cut matrix with corners cut so as to fit the circular substrate 10.
By using the staggered arrangement of the low-frequency transmission unit 40 and the high-frequency transmission unit 30, the cross polarization influence can be reduced, the mutual influence degree of independent currents in two frequency bands is small, and the method is suitable for being applied to THz low-frequency communication.
The high-frequency transmission unit 30 is five-star-shaped, and the five-star-shaped high-frequency transmission unit 30 comprises 5T-shaped branches 31, and the lower ends of vertical grooves 31A of the 5T-shaped branches 31 are connected with each other. The transverse grooves 31B of the 5T-shaped branches 31 are concentric circular arcs. The low frequency transmission unit 40 includes a circular ring groove 41 and a cross groove 42 disposed inside the circular ring groove 41.
The high-frequency transmission unit 30 is improved by a jersey cooling cross, the cross is changed into a five-star structure, and the expansion of an intermediate space is realized by grooving, so that the transmission coefficient of the high-frequency transmission unit can be increased without affecting the transmission and phase performance of the low-frequency transmission unit 40. The low-frequency transmission unit 40 is an improved structure of a circular ring structure, and although a common circular ring structure can realize a better transmission coefficient, the phase does not satisfy 360 DEG phase distribution in a plurality of layers. By loading the cross groove 42 in the middle of the circular ring, the high-frequency phase of the antenna can be effectively improved, and the phase effect of 360 degrees can be realized by fewer layers of the lens. The mutual influence between the high-frequency transmission unit and the low-frequency transmission unit of the antenna is less, the mutual influence between the two unit cells is less due to the asymmetric structure, the isolation between the antennas can be improved, the requirement of the dual-frequency transmission array antenna is met, the 90/140GHz dual-frequency band of the antenna is covered, meanwhile, the transmission coefficient is larger than 0.85 in two opposite frequency bands, and the phase position meets 360 degrees. The design of the lens and the manufacture of the antenna are convenient and quick.
The low frequency of this embodiment is 90GHz, the high frequency is 140GHz, the wavelength of the 90GHz electromagnetic wave is about 3.33 mm, and the wavelength of the 140GHz electromagnetic wave is about 2.14 mm.
The diameter of the high-frequency transmission unit 30 is related to Gao Pinpin wavelengths and is 0.38-0.43 times of the high-frequency wavelength, and the inner diameter of the circular groove 41 of the low-frequency transmission unit 40 is related to the low-frequency wavelength and is 0.08-0.13 times of the low-frequency wavelength.
The substrate 10 is made of rogers plate, the thickness H1 of the substrate 10 is 2mm, and the thickness H2 of the air gap 300 is 0.5mm. The aperture plane of the feed antenna 200 is 18.85mm from the center of the top surface of the fixed lens. The focal diameter ratio of the antenna is 0.85, and the focal length F of the feed antenna 200 is 21.85mm. The row pitch R1 of the matrix of high frequency transmissive units 30 is 1.15 mm, the column pitch C1 is 1.15 mm, the row pitch R2 of the matrix of low frequency transmissive units 40 is 1.15 mm, and the column pitch C2 is 1.15 mm.
The outer diameter D1 of the high-frequency transmission unit 30 is 0.82-0.94 mm, and the width B1 of the vertical groove 31A of the T-shaped branch 31 is 0.12mm. The width B2 of the transverse groove 31B is 0.10mm, and the central angle corresponding to the transverse groove 31B is 55 °. The side edges at the two ends of the transverse groove 31B are internally retracted, and the included angle of the side edges at the two ends of the transverse groove 31B is 90 degrees. The inner diameter D2 of the circular groove 41 of the low frequency transmission unit 40 is 0.28 to 0.44mm, and the width B3 of the circular groove 41 is 0.1mm. The end of the cross groove 42 is a concentric arc, the outer diameter D3 of the cross groove 42 is 0.18-0.28 mm, and the groove width B4 of the cross groove 42 is 0.15mm.
Phase compensation value of fixed lens branch transmission unit；
Wherein,is the phase compensation value, k of the transmission unit in the ith row and the jth column of the fixed lens 0 Is the electromagnetic wave space propagation constant at the center frequency, +.>Is the distance from the feed source antenna to the transmission unit of the ith row and the jth column, L is the distance from the aperture plane of the feed source antenna to the center of the top surface of the fixed lens,/I>Is the initial phase value of the lens center cell.
The phases of the lens 100a 4 coaxially stacked lens layers are the same, and each transmission unit of the lens layers determines the structural size according to the phase compensation value of the corresponding transmission unit.
Phase compensation value of movable lens branch transmission unit；
Wherein,is the first +.>Line, th->The phase compensation value of the column transmission unit is F, the focal length of the feed source antenna, lambda is the wavelength corresponding to the central frequency, for a dual-frequency transmission array antenna, two different central frequencies exist in two frequency bands, the low-frequency central frequency is 90GHz, and the high-frequency central frequency is 140GHz.
The movable lens can set the phase of the shooting unit unchanged along the X-axis direction, and the formula is as followsIs->. That is to say,the phase compensation value of the transmission unit can also be obtained by the following deflection equation: />；
Wherein,is the phase compensation value of the transmission cell, +.>Is the propagation constant of electromagnetic wave in free space, L is the distance between the aperture plane of feed antenna and the center of fixed lens, < >>、/>And->Spatial coordinate values of the transmission units, respectively,>for the angle of deflection of electromagnetic waves, e.g.>May be set to 20 °.
The rotation range of the movable lens 100B relative to the fixed lens 100A is 0-90 degrees, and the scanning function of the transmission array antenna is realized through the relative rotation of the two lenses. The relative angle between the two lenses is offset by one angle from one direction. If the relative rotation angle of the movable lens 100B and the fixed lens 100A is 15 °, the deflection angle of the electromagnetic wave after passing through the transmission array is about 10 °; when the relative rotation angle of the movable lens 100B and the fixed lens 100A is 30 °, the electromagnetic wave passes through the transmission array and then deflects by about 20 °; when the relative rotation angle of the movable lens 100B and the fixed lens 100A is 45 °, the deflection angle of the electromagnetic wave after passing through the transmission array is about 30 °; when the relative rotation angle of the movable lens 100B and the fixed lens 100A is 60 °, the electromagnetic wave passes through the transmission array and then deflects by about 35 °.
The dual-frequency unit realizes the dual-frequency transmission array antenna beam scanning function in a common caliber mode by relative rotation and adjustment of the upper and lower distances, so that the antenna feed source space size can be effectively improved without losing the scanning angle and gain loss.
The gain loss of the traditional transmission array scanning is within 2-5 dB, the gain effect is reduced along with the increase of the scanning angle, the scanning angle is narrower, the gain loss of the transmission array antenna of the embodiment of the invention can be maintained within 2dB, and the scanning angle can reach about 40 degrees, so that the wider scanning effect is realized.
According to the dual-frequency beam scanning transmission array antenna disclosed by the embodiment of the invention, the electromagnetic waves are fed through the rectangular horn 200 and focused to the lower lens through the upper lens, so that the deflection function is realized, and the transmission array beam focusing and beam scanning effects can be well realized through the relative rotation of the lower lens. The lens is composed of four layers of Rogowski plates, low loss of a high frequency band can be realized, and the antenna has good beam focusing and scanning effects by adjusting the phase of the transmission array and the relative distance between the two lenses, so that the multi-point high-quality stable transmission of antenna information is ensured.
Fig. 9 illustrates transmission coefficients and phase parameters of a transmission array antenna and beam scanning effects under respective rotation angles of two frequency bands, and it can be seen from the figure that the transmission coefficients of the transmission array antenna in the two frequency bands are higher than-1 dB, and the phase is about 360 degrees, so that the transmission coefficients and phase effects required by the transmission array antenna can be well satisfied.
Fig. 10 to 11 are graphs showing the relationship between the size and the phase of the transmission array antenna according to the embodiment of the present invention, and it can be seen from fig. 10 to 11 that the phase between the two frequency bands does not affect each other between the sizes.
Fig. 12 to fig. 13 are graphs of scanning effects of the transmissive array antenna according to the embodiment of the present invention, the scanning gain in two frequency bands can reach about 19.5/21.3dBi, the gain loss is about-2 dB, and the scanning effect is superior to that of the conventional dual-frequency beam scanning transmissive array antenna.
The beam scanning transmission array antenna of the above embodiment of the invention has a dual-band scanning effect, and is different from the traditional transmission array antenna, the beam scanning transmission array antenna of the above embodiment of the invention does not rotate a feed source, and the scanning effect of two bands is realized by rotating a movable lens. By utilizing the rism principle, the movable lens 100B uses a deflection transmission array, the fixed lens 100A uses a single focusing transmission array, beams on one axis are focused through linear phases, and the antenna can realize the same beam scanning effect in two wave bands through the relative rotation of the movable lens. The gain of the transmission array antenna in two frequency bands is improved by more than 10dB, the gain loss is within 2.5dB, a good beam scanning effect is realized, the scanning angle is wider, and the transmission array antenna can be applied to a scene requiring multiple channels and multiple capacity channels.
Claims (9)
1. The dual-frequency beam scanning transmission array antenna comprises a transmission array and a feed source antenna, and is characterized in that the transmission array comprises two lenses, and the two lenses are coaxial with the feed source antenna; the lens comprises a lens layer, wherein the lens layer comprises a substrate and a patch layer attached to the substrate, the patch layer comprises a plurality of transmission units, and the plurality of transmission units comprise a plurality of high-frequency transmission units and a plurality of low-frequency transmission units; the high-frequency transmission units are arranged in a matrix of M rows and N columns, the low-frequency transmission units are arranged in a matrix of (M-1) rows and (N-1) columns, and the low-frequency transmission units and the high-frequency transmission units are staggered at intervals; one of the two lenses is a fixed lens, and the other lens is a rotatable movable lens;
phase compensation value of transmission unit；
Wherein,phase compensation value, k, of the transmission unit of the ith row and the jth column of the transmission array 0 Is the electromagnetic wave space propagation constant at the center frequency,is the distance from the feed source antenna to the transmission unit of the ith row and the jth column, L is the distance from the aperture surface of the feed source antenna to the center of the fixed lens,is the initial phase value of the lens center cell.
2. The dual-frequency beam scanning transmission array antenna of claim 1, wherein the lens comprises a plurality of said lens layers, the plurality of lens layers being arranged in layers; the patch layer is a copper foil layer, and the copper foil layer of the lens layer faces the feed source antenna; an air gap is formed between the two lenses, and the center point of the low-frequency transmission unit is positioned at the intersection point of the diagonals of the adjacent 4 high-frequency transmission units; the substrate is round, and the matrix is a corner cutting matrix with four corners removed.
3. The dual-frequency beam scanning transmission array antenna according to claim 1, wherein the high-frequency transmission unit is a five-star, the five-star high-frequency transmission unit comprises 5T-shaped branches, and lower ends of the 5T-shaped branch vertical slots are connected with each other; the transverse grooves of the 5T-shaped branches are concentric circular arcs; the low frequency transmission unit includes a circular groove and a cross groove disposed inside the circular groove.
4. The dual-band beam scanning transmission array antenna of claim 3, wherein the diameter of the high-band transmission unit is 0.38 to 0.43 times of the wavelength of the high-band, and the inner diameter of the circular groove of the low-band transmission unit is 0.08 to 0.13 times of the wavelength of the low-band.
5. The dual-frequency beam scanning transmission array antenna of claim 2, wherein the fixed lens is close to the feed antenna and the movable lens is far away from the feed antenna in the two lenses; the number of the lens layers is 4, the substrate is a Rogowski plate, the thickness of the substrate is 2mm, and the thickness of the air gap is 0.5mm; the distance between the caliber surface of the feed source antenna and the fixed lens is 18.85mm, and the focal length of the feed source antenna is 21.85mm; the row spacing of the high frequency transmissive element matrix is 1.15 mm, the column spacing is 1.15 mm, the row spacing of the low frequency transmissive element matrix is 1.15 mm, and the column spacing is 1.15 mm.
6. The dual-band beam scanning transmission array antenna of claim 1, wherein the low frequency is 90GHz and the high frequency is 140GHz.
7. A dual-frequency beam scanning transmission array antenna according to claim 3, wherein the outer diameter of the high-frequency transmission unit is 0.82-0.94 mm, and the width of the T-shaped branch vertical slot is 0.12mm; the width of the transverse groove is 0.10mm, and the central angle corresponding to the transverse groove is 55 degrees; the side edges at the two ends of the transverse groove are retracted, and the included angle is 90 degrees; the inner diameter of the circular ring groove of the low-frequency transmission unit is 0.28-0.44 mm, and the width of the circular ring groove is 0.1mm; the external diameter of the cross groove is 0.18-0.28 mm, and the groove width of the cross groove is 0.15mm.
8. The dual frequency beam scanning transmission array antenna of claim 1, wherein the deflection formula:；
wherein,is the phase compensation value of the transmission cell, +.>Is the propagation constant of electromagnetic wave in free space, L is the distance between the aperture plane of feed antenna and the center of fixed lens, < >>And->Respectively the spatial coordinate values of the transmission units,is the electromagnetic wave deflection angle which is customized.
9. The dual-frequency beam scanning transmission array antenna according to claim 1, wherein the range of rotation of the movable lens relative to the fixed lens is 0 ° to 90 °, and the scanning function of the transmission array antenna is realized by the relative rotation of the two lenses.
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| CN107425291A (en) * | 2017-07-28 | 2017-12-01 | 电子科技大学 | Produce the antenna of the Bezier wave beam of any sensing |
| CN111786090A (en) * | 2020-07-06 | 2020-10-16 | 电子科技大学 | Planar broadband transmission array antenna based on liquid crystal adjustable material |
| CN116315670A (en) * | 2023-03-31 | 2023-06-23 | 上海府大科技有限公司 | Dual-band chromatic aberration-free beam scanning antenna and antenna array applied by same |
| CN116404403A (en) * | 2023-04-26 | 2023-07-07 | 中山大学 | 3D prints linear polarization and changes circular polarization scanning antenna |
| CN116526159A (en) * | 2023-04-21 | 2023-08-01 | 东莞市南斗星科技有限公司 | THz double-frequency transmission array antenna |
-
2023
- 2023-09-14 CN CN202311181609.9A patent/CN116914443B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425291A (en) * | 2017-07-28 | 2017-12-01 | 电子科技大学 | Produce the antenna of the Bezier wave beam of any sensing |
| CN111786090A (en) * | 2020-07-06 | 2020-10-16 | 电子科技大学 | Planar broadband transmission array antenna based on liquid crystal adjustable material |
| CN116315670A (en) * | 2023-03-31 | 2023-06-23 | 上海府大科技有限公司 | Dual-band chromatic aberration-free beam scanning antenna and antenna array applied by same |
| CN116526159A (en) * | 2023-04-21 | 2023-08-01 | 东莞市南斗星科技有限公司 | THz double-frequency transmission array antenna |
| CN116404403A (en) * | 2023-04-26 | 2023-07-07 | 中山大学 | 3D prints linear polarization and changes circular polarization scanning antenna |
Non-Patent Citations (1)
| Title |
|---|
| Generating and Steering Quasi-Nondiffractive Beam by Near-Field Planar Risley Prisms;Yi Chen Zhong等;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;第第68卷卷(第第12期期);论文第7767-7775段 * |
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| CN116914443A (en) | 2023-10-20 |
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