CN114583464A - Three-layer multi-beam luneberg lens antenna - Google Patents
Three-layer multi-beam luneberg lens antenna Download PDFInfo
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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
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- H01Q1/00—Details of, or arrangements associated with, antennas
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- 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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Abstract
The invention provides a three-layer multi-beam luneberg lens antenna, which comprises three layers of dielectric substrates with the same structure, wherein the three layers of dielectric substrates are arranged at intervals and in parallel in a direction vertical to the dielectric substrates; each dielectric substrate is configured to: the dielectric substrate comprises a cylindrical inner substrate and an annular outer substrate nested on the periphery of the inner substrate, and a plurality of through holes are formed in the inner substrate and the outer substrate, so that the equivalent dielectric constant of each layer of dielectric substrate is gradually reduced from the center to the outermost layer. The antenna adopts a three-layer lens structure, has light and handy structure, low processing cost and higher gain, can better meet the requirement of multi-beam high-gain radiation of 5G millimeter wave frequency bands, and has higher application value.
Description
Technical Field
The invention relates to an antenna technology in a wireless communication system, in particular to a three-layer multi-beam luneberg lens antenna.
Background
The performance of the antenna, which is a key component in the front end of the communication system, is directly related to the performance of the whole communication system. With the overall advance of wireless communication technologies represented by 5G and the internet of things, the development of a high-gain multi-beam antenna assembly suitable for the application scenario is urgently needed. Lens antennas are an important branch of antennas, widely used in mobile communication, millimeter wave communication, satellite communication and other scenes, and are a hot point of research in the industry in recent years.
In millimeter wave and terahertz frequency band, the graded index lens has excellent performance, and the research and application of the luneberg lens antenna are wide. The luneberg lens is generally spherical or cylindrical, and its graded index satisfies the following formula:
wherein n iseffRepresenting the equivalent refractive index and r is the normalized radius. The central equivalent refractive index of the Luneberg lens can be obtained according to a formula
The edge is 1. And the equivalent refractive index n of the lenseffAnd an equivalent dielectric constant εeffThe following correspondence exists:
εeff＝neff 2
so for a luneberg lens the equivalent dielectric constant varies from 2 to 1 from the center to the edge of the lens. The physical characteristics enable the luneberg lens to convert spherical waves radiated by the feed source into plane waves to be radiated out so as to realize high gain. The luneberg lens is a highly symmetrical structure, so that multi-beam radiation can be realized by placing a plurality of feed source antennas or switching different feed source antennas.
Heretofore, no material having a continuously variable dielectric constant has been found in nature. At present, there are several general approaches to approximate the graded index. The first type is a luneberg lens of a parallel slab waveguide type in which the equivalent refractive index is changed by changing the thickness of a medium (air or other medium) filled between parallel slabs in the radial direction, and the other type is a discrete graded index by placing a certain number of periodically arranged metal posts between parallel slabs and changing the height of the metal posts. The second type is graded index achieved using metamaterials or metamaterials, and such lenses are typically constructed from a number of metamaterials or metamaterials cells, each cell being of similar construction but having different dimensions, the graded index being achieved by varying the structural dimensions of each cell. The third type is based on equivalent medium theory, and the required refractive index is realized by changing the filling ratio corresponding to each medium layer.
The first parallel plate waveguide-type luneberg lens is composed of two parallel metal plates, which results in an inherent disadvantage of heavy weight of the lens antenna, and light weight cannot be realized. Meanwhile, filling the non-regular shaped medium in the parallel slab waveguide also brings complexity to antenna processing, and therefore corresponding cost and practicability are increased. In addition, the implementation of graded index lenses by arranging a large number of periodic metal posts can only be done by milling, which is particularly costly. The second type metamaterial/super-surface luneberg lens is complex in structure, difficulty is increased for antenna design, and processing cost is high. The third type of luneberg lens antenna based on equivalent medium theory usually has two modes of 3D printing and medium substrate hole digging. The 3D printed luneberg lens is generally spherical and has a large volume, and the cost of the 3D printing processing method is not as low as that of the media substrate hole digging. The medium substrate is dug only by mechanically drilling the substrate, so that the cost is low and the processing is convenient. However, most of the conventional dielectric substrate open-cell luneberg lens antennas have a single-layer structure, which has the problems of non-ideal antenna gain, small antenna beam coverage, and the like.
Disclosure of Invention
It is an object of the present invention to at least partially solve the above-mentioned problems of the prior art and to provide a three-layer multi-beam luneberg lens antenna.
The invention discloses a three-layer multi-beam luneberg lens antenna, which comprises three layers of dielectric substrates with the same structure, wherein the three layers of dielectric substrates are arranged at intervals and in parallel in a direction perpendicular to the dielectric substrates;
each dielectric substrate is configured to: the dielectric substrate comprises a cylindrical inner substrate and an annular outer substrate nested on the periphery of the inner substrate, and a plurality of through holes are formed in the inner substrate and the outer substrate, so that the equivalent dielectric constant of each layer of dielectric substrate is gradually reduced from the center to the outermost layer.
Preferably, the relative permittivity of the inner substrate is larger than the relative permittivity of the outer substrate.
Preferably, the internal substrate has a relative dielectric constant of 3.66, and the external substrate has a relative dielectric constant of 2.2.
Preferably, the inner substrate may be divided into N concentric cylindrical rings, the outer substrate may be divided into M concentric cylindrical rings, and N > M, each of the cylindrical rings having a plurality of through holes distributed along a circumferential direction thereof.
Preferably, the inner substrate is divided into 10 concentric cylindrical rings, and the outer substrate is divided into 3 concentric cylindrical rings.
Preferably, the through holes distributed on the same cylindrical ring have the same volume V1The number n of the through holes formed in one cylindrical ring satisfies the following conditions:
n＝p*V2/V1formula (1);
wherein, V2The filling rate p is determined by the following equation for the volume of the corresponding cylindrical ring and p is the filling rate of the corresponding cylindrical ring,
in the formula (2), epsiloneffIs corresponding to the equivalent dielectric constant of the cylindrical ringairIs the relative dielectric constant of air, epsilonsubIs the relative dielectric constant of the corresponding substrate.
Preferably, the antenna comprises a plurality of feed antennas arranged on one side of the edge of the middle dielectric substrate in the three-layer dielectric substrate.
Preferably, seven feed antennas are arranged and evenly distributed on one side of the edge of the middle layer dielectric substrate at an angle interval of 18 degrees, and scanning of +/-55 degrees, namely multi-beam radiation, can be realized by feeding different feed antennas.
Preferably, in the three dielectric substrates, the distance between two adjacent dielectric substrates is 3 mm.
Preferably, the inner substrate, the outer substrate, and the substrate of the feed antenna have the same thickness.
The significant advancement of the present invention is at least reflected in:
the antenna provided adopts a three-layer lens structure, has light and handy structure, simple processing, low cost and higher gain, and meets the requirement of multi-beam high-gain radiation of 5G millimeter wave frequency bands. Compared with a lens with a single-layer structure, the lens restrains H-plane side lobe level and improves antenna gain; further, based on the antenna, multi-beam high-gain radiation can be realized, and the antenna realizes broadband radiation; the lens part of the antenna is an all-dielectric substrate, a metal parallel flat plate or other metal structures are not needed, the light weight is realized, and the whole weight of the antenna is only 32 g; in addition, the antenna only needs a PCB process, is small in processing difficulty, low in cost and high in practical value.
Description of the drawings:
fig. 1 is a structural diagram of a dielectric substrate in a luneberg lens antenna according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a processed object of a Luneberg lens antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a feed antenna structure according to an embodiment of the present invention;
FIG. 4 is an E-plane electric field diagram of an Luneberg lens antenna according to an embodiment of the present invention;
FIG. 5 is a field diagram of an H-plane electric field of an Luneberg lens antenna according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating S parameter test results of a Luneberg lens antenna according to an embodiment of the present invention;
FIG. 7 is an E-plane multi-beam normalized directional diagram of a Luneberg lens antenna at 27GHz according to an embodiment of the present invention;
FIG. 8 is an E-plane multi-beam normalized directional diagram of a Luneberg lens antenna at 29GHz according to an embodiment of the present invention;
FIG. 9 is an E-plane multi-beam normalized directional diagram of a Luneberg lens antenna at 31GHz according to an embodiment of the present invention;
fig. 10 shows the peak gain of a luneberg lens antenna according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, the embodiments of the present invention are as follows:
with reference to fig. 1-2, the present embodiment provides a three-layer multibeam luneberg lens antenna, which includes a top dielectric substrate 1a, a middle dielectric substrate 1b, and a bottom dielectric substrate 1c having the same structure, where the three dielectric substrates are arranged in parallel and at intervals in a direction perpendicular to the dielectric substrates; it can be understood that, in practical applications, in order to facilitate the fixing of each layer of dielectric substrate, at least one fixing portion may be disposed at an edge of each layer of dielectric substrate, and the fixing portion may be integrated with the corresponding dielectric substrate, for example, as shown in fig. 2, the fixing portion is a fixing lug 14 extending from one side edge of the dielectric substrate, a fixing hole is disposed on the fixing lug 14, each layer of dielectric substrate is fixed on the fixing column by passing the fixing column through the fixing hole, and the fixing hole and the fixing column may be fixed by an adhesive; furthermore, the fixed positions of the fixed lugs on the fixed columns can be adjusted, so that the spacing distance between the medium substrates of all layers can be adjusted;
each dielectric substrate is configured to: the dielectric substrate comprises a cylindrical inner substrate 11 and an annular outer substrate 12 nested on the periphery of the inner substrate 11, wherein a plurality of through holes 13 are formed in the inner substrate 11 and the outer substrate 12, so that the equivalent dielectric constant of each layer of dielectric substrate is gradually reduced from the center to the outermost layer.
Preferably, each layer of dielectric substrate forms a decreasing change with the equivalent dielectric constant ratio of 2 between the center and the edge, i.e. the equivalent dielectric constant at the center of the dielectric substrate is 2 and the equivalent dielectric constant at the edge is 1.
It is understood that according to the equivalent dielectric theory, the equivalent dielectric constant can be controlled by controlling the filling rate of the dielectric material. In the above embodiment, the opening is formed in the dielectric substrate, and the filling material is air. By controlling the number and diameter of the through holes, the equivalent dielectric constant (namely the equivalent refractive index) meeting the requirements can be obtained, and by reasonably arranging the through holes on the dielectric substrate, the equivalent dielectric constant of the dielectric substrate can be gradually decreased from the center to the outermost layer. It should be further noted that, in the above embodiments, each layer of dielectric substrate constitutes one layer of lens, and compared with the existing planar luneberg lens antenna, the antenna in the embodiments of the present application can enable electromagnetic waves radiated from the feed antenna and then scattered into a free space to enter the upper and lower layers of lenses again by stacking one layer of lens (the top layer dielectric substrate 1a and the bottom layer dielectric substrate 1c) on the upper and lower sides of the single layer of lens (the middle layer dielectric substrate 1b) respectively, and then focus through the lens, so that the focusing effect is further enhanced, and the gain of the entire antenna is further improved. Still further, the luneberg lens of this application embodiment is the constitution of all-dielectric substrate, does not need parallel flat board of metal or other metal structure, has realized the lightweight, and whole antenna overall weight is only about 32 g. In addition, the antenna of the embodiment of the application only needs a PCB process, is small in processing difficulty, easy to manufacture and relatively low in cost.
As described above, based on the antenna arrangement of the three-layer dielectric substrate structure of the above embodiment, the electromagnetic wave radiated and scattered into the free space can be focused again by the upper and lower two-layer lenses, thereby improving the gain of the antenna. In practical tests, the arrangement of the spacing between the three dielectric substrates has a significant influence on the focusing effect of the lens, and thus the gain effect of the antenna is influenced. Considering the influence of the distance between the dielectric substrates on the antenna gain and realizing the miniaturization design of the antenna to the maximum extent, as an optimized implementation mode, the distance between two adjacent dielectric substrates in the three dielectric substrates is suggested to be set to be 3mm, so that the optimal antenna gain effect is achieved, and the miniaturization design of the antenna is guaranteed.
In some embodiments, the relative permittivity of the inner substrate is greater than the relative permittivity of the outer substrate. Based on the arrangement mode, the decreasing change of the equivalent dielectric constant of the lens formed by each layer of dielectric substrate from the center to the edge of the lens can be realized more conveniently, and it should be further described that each layer of dielectric substrate is constructed by two substrates with different dielectric constants in the embodiment, which is more beneficial to realizing the miniaturization design of the antenna size. Specifically, in the existing scheme of implementing the gradual change of the dielectric constant by forming the through hole on the single dielectric substrate, in order to implement the gradual change of the dielectric constant from the center to the edge, the opening ratio is usually set to be gradually increased from the center to the edge, and therefore, the opening density on the substrate at the edge part is relatively high, on one hand, the processing difficulty is increased, and on the other hand, the structural strength of the substrate is also reduced. Furthermore, it is difficult to achieve a change from 2 to 1 in equivalent dielectric constant from center to edge based on a monolithic dielectric substrate. Based on this, in the present embodiment, it is newly proposed that each dielectric substrate is constructed by two substrates, and the dielectric constant of the internal substrate 11 is greater than that of the external substrate 12, so that the density of the openings on the external substrate 12 can be smaller than that of the outermost part of the internal substrate 11, and the above-mentioned problem of the luneberg lens antenna based on a single dielectric substrate in the prior art is solved more skillfully.
As a further preferred embodiment, the relative dielectric constant of the internal substrate 11 is 3.66, and the relative dielectric constant of the external substrate 12 is 2.2, so that it is more beneficial to realize that the equivalent dielectric constant of each layer of dielectric substrate forms a decreasing change with a change range of 2 to 1 from the center to the edge.
In some embodiments, the inner substrate 11 is divided into N concentric cylindrical rings, the outer substrate 12 is divided into M concentric cylindrical rings, N and M are positive integers not less than 2, and N > M, and each cylindrical ring has a plurality of through holes 13 distributed along its circumferential direction. It should be noted that, with the arrangement of this embodiment, each dielectric substrate can obtain a discrete gradually-changed equivalent dielectric constant (refractive index) from the center to the edge; thus, a desired gradient distribution of the equivalent dielectric constant can be achieved by appropriately arranging the number of concentric cylindrical rings constituting the inner substrate 11 and the outer substrate 12. In a preferred embodiment, the inner substrate 11 is divided into 10 concentric cylindrical rings and the outer substrate 12 is divided into 3 concentric cylindrical rings.
It should also be noted that in the above embodiment, the concentric rings divided on the inner substrate 11 and the outer substrate 12 can be understood as virtual division, i.e., the inner substrate 11 and the outer substrate 12 are both a single monolithic substrate. Of course, the concentric rings divided on the inner substrate 11 and the outer substrate 12 may also be physically divided according to actual needs, that is, the inner substrate 11 and the outer substrate 12 are formed by nesting and combining a plurality of independent cylindrical rings.
According to the foregoing embodiments, in each layer of dielectric substrate, the equivalent dielectric constant is gradually decreased from the center to the edge, and therefore, the equivalent dielectric constant from the cylindrical ring at the center to the cylindrical ring at the edge also shows the variation trend, in practice, the equivalent dielectric constant of each cylindrical ring can be sequentially set according to the desired dielectric constant distribution, and after the equivalent dielectric constant of each cylindrical ring is set, the diameter of the through holes and the number of the through holes on each cylindrical ring can be set in a matching manner, so that the equivalent dielectric constant of each cylindrical ring can be setThe corresponding set numerical value is satisfied. Specifically, taking a certain cylindrical ring as an example, the through hole filling rate p of the cylindrical ring and the equivalent dielectric constant epsilon of the cylindrical ringeffThe following relation is satisfied:
in the above formula, the equivalent dielectric constant ε of the cylindrical ringeffIs a known set value, epsilonairIs the relative dielectric constant of air, epsilonsubThe relative dielectric constant of the substrate to which the cylindrical rings belong, and therefore, the through hole filling rate p of each cylindrical ring can be calculated through the relational expression.
As a further preferred embodiment, in order to improve the efficiency of the processing and manufacturing, the through holes 13 distributed on the same cylindrical ring can be set to the same size, that is, each through hole 13 has the same volume V1For a certain cylindrical ring, the filling rate p of the through holes is equal to the ratio of the sum of the volumes of the through holes to the volume of the cylindrical ring, so that the number n of the through holes formed in the cylindrical ring can be determined by the following equation:
n＝p*V2/V1；
in the above formula, V2Is the volume of the cylindrical ring. Therefore, after the opening size of the through holes is determined, the volume V of each through hole can be determined1And further the number of through holes required to be opened can be determined.
In some embodiments, the luneberg lens antenna further comprises a plurality of feed antennas 2 disposed on the edge side of the middle dielectric substrate 1b of the three-layer dielectric substrate. The front end of each feed antenna is aligned with the center of the middle layer dielectric substrate 1b, and the back end is connected with signal ports (port1, port2, port3, port4, port5, port6 and port 7).
As an alternative, the feed antenna 2 is a reverse-foot linear conical antenna to realize a wide impedance bandwidth. Referring to fig. 3, such an antenna generally includes a PCB substrate and two metal patches (21, 22) printed on the upper and lower surfaces of the PCB substrate and opened back to back, and the upper and lower metal patches are connected through a metallization hole 23 on the substrate, and the specific structure thereof will not be described herein.
As a preferred embodiment, referring to fig. 2, seven feed antennas 2 are provided, and the seven feed antennas are uniformly distributed on one side of the edge of the intermediate layer dielectric substrate 1b at angular intervals of 18 °, that is, the angular difference between the radial directions of two adjacent feed antennas is 18 °, and scanning of ± 55 ° can be realized by feeding different feed antennas 2, that is, multi-beam radiation is realized.
In some embodiments, the inner substrate, the outer substrate, and the substrate of the feed antenna are the same thickness. Based on the setting mode of this embodiment, can conveniently realize the synchronous processing of three base plate, promote the processing preparation efficiency of antenna. Specifically, the thicknesses of the inner substrate, the outer substrate, and the substrate of the feed antenna are all configured to be 1.5 mm.
In order to verify the performance effect of the luneberg lens antenna provided in the embodiment of the present application, the following description is made with reference to actual antenna test data. The tested antennas were set to: the inner substrate material adopts Rogers RO4350B (the relative dielectric constant is 3.66), the outer substrate adopts F4BME220 (the relative dielectric constant is 2.2), the feed source antenna adopts F4BME220 substrate, their thickness is 1.5mm, the inner substrate is divided into 10 concentric cylinder rings, divide into 3 concentric cylinder rings with the outer substrate, adjacent two-layer dielectric substrate interval 3mm sets up, the radius of every layer of dielectric substrate is 33mm, antenna overall height is 10.5 mm.
The test results are given with reference to fig. 4-10, where fig. 4 is an E-plane electric field diagram of the tested luneberg lens antenna, and since the feed source antenna adopts horizontal polarization, the luneberg lens antenna appears as an E-plane focused lens antenna, and it can be seen that the focusing effect of the antenna is better; fig. 5 is an H-plane electric field diagram of the tested luneberg lens antenna, and it can be seen that the lens with the three-layer structure of the present application can obviously suppress the side lobe of the H-plane; FIG. 6 is a graph showing the results of S parameter testing of the tested Luneberg lens antenna; fig. 7-9 are E-plane multi-beam normalized patterns of the tested luneberg lens antenna at 27GHz, 29GHz, and 31GHz, respectively, and fig. 10 is the peak gain of the tested luneberg lens antenna. It can be seen that the antenna of the present application can realize ± 55 ° multi-beam high-gain radiation, and the gain of the central beam at 28GHz is 18.2 dBi. Meanwhile, the antenna realizes broadband radiation, the-10 dB impedance bandwidth is 24GHz-34GHz, the gains of different beams are all larger than 16dBi within the range of 25.5GHz-32.5GHz, and a relatively obvious gain effect is realized.
In the description of the embodiments of the invention, the particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The three-layer multi-beam luneberg lens antenna is characterized by comprising three layers of dielectric substrates with the same structure, wherein the three layers of dielectric substrates are arranged at intervals and in parallel in a direction perpendicular to the dielectric substrates;
each dielectric substrate is configured to: the dielectric substrate comprises a cylindrical inner substrate and an annular outer substrate nested at the periphery of the inner substrate, wherein a plurality of through holes are formed in the inner substrate and the outer substrate, so that the equivalent dielectric constant of each layer of dielectric substrate is gradually reduced from the center to the outermost layer.
2. The three-layer multi-beam luneberg lens antenna of claim 1, wherein the relative permittivity of the inner substrate is greater than the relative permittivity of the outer substrate.
3. The three-layer multi-beam luneberg lens antenna of claim 2, wherein the inner substrate has a relative permittivity of 3.66 and the outer substrate has a relative permittivity of 2.2.
4. The three-layer multi-beam luneberg lens antenna of any one of claims 1-3, wherein the inner substrate is divided into N concentric cylindrical rings, the outer substrate is divided into M concentric cylindrical rings, and N > M, each cylindrical ring having a plurality of through holes distributed along its circumferential direction.
5. The three-layer, multi-beam luneberg lens antenna of claim 4, wherein the inner substrate is divided into 10 concentric cylindrical rings and the outer substrate is divided into 3 concentric cylindrical rings.
6. The three-layer multi-beam luneberg lens antenna of claim 4, wherein the through holes distributed on the same cylindrical ring have the same volume V1The number n of the through holes formed in one cylindrical ring satisfies the following conditions:
n＝p*V2/V1formula (1);
wherein, V2The filling rate p is determined by the following equation for the volume of the corresponding cylindrical ring and p is the filling rate of the corresponding cylindrical ring,
in the formula (2), epsiloneffTo correspond toEquivalent dielectric constant of cylindrical ring, epsilonairIs the relative dielectric constant of air, epsilonsubIs the relative dielectric constant of the corresponding substrate.
7. The three-layer multi-beam luneberg lens antenna of claim 1, further comprising a plurality of feed antennas disposed on an edge side of a middle dielectric substrate of the three-layer dielectric substrate.
8. The three-layer multi-beam luneberg lens antenna according to claim 7, wherein seven feed antennas are provided, the seven feed antennas are uniformly distributed at angular intervals of 18 ° on the edge side of the intermediate layer dielectric substrate, and ± 55 ° scanning, i.e., multi-beam radiation, can be achieved by feeding different feed antennas.
9. The three-layer multi-beam luneberg lens antenna of claim 1, wherein the spacing between two adjacent dielectric substrates in the three dielectric substrates is 3 mm.
10. The three-layer multi-beam luneberg lens antenna of claim 7, wherein the inner substrate, outer substrate and the substrates of the feed antenna are the same thickness.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230148063A1 (en) * | 2021-11-11 | 2023-05-11 | Raytheon Company | Planar metal fresnel millimeter-wave lens |
| CN117913532A (en) * | 2024-03-20 | 2024-04-19 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave Long Bo lens antenna |
| WO2024156873A1 (en) * | 2023-01-27 | 2024-08-02 | Bea Sa | Radiation unit |
-
2022
- 2022-03-07 CN CN202210215534.0A patent/CN114583464A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| XI WANG 等: ""An E-Plane-Focused Triple-Layer Multibeam Luneburg Lens Antenna for 5G Millimeter-Wave Applications"", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》, vol. 21, no. 02, 2 November 2021 (2021-11-02), pages 1 - 11 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230148063A1 (en) * | 2021-11-11 | 2023-05-11 | Raytheon Company | Planar metal fresnel millimeter-wave lens |
| US11870148B2 (en) * | 2021-11-11 | 2024-01-09 | Raytheon Company | Planar metal Fresnel millimeter-wave lens |
| WO2024156873A1 (en) * | 2023-01-27 | 2024-08-02 | Bea Sa | Radiation unit |
| CN117913532A (en) * | 2024-03-20 | 2024-04-19 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave Long Bo lens antenna |
| CN117913532B (en) * | 2024-03-20 | 2024-06-04 | 微网优联科技(成都)有限公司 | Dual-polarized millimeter wave Long Bo lens antenna |
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