CN110212309A - The conformal lens antenna of optical transform multi-beam - Google Patents
The conformal lens antenna of optical transform multi-beam Download PDFInfo
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- CN110212309A CN110212309A CN201910530324.9A CN201910530324A CN110212309A CN 110212309 A CN110212309 A CN 110212309A CN 201910530324 A CN201910530324 A CN 201910530324A CN 110212309 A CN110212309 A CN 110212309A
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—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
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0031—Parallel-plate fed arrays; Lens-fed arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
- H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
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Abstract
The present invention relates to a kind of conformal lens antennas of optical transform multi-beam, including di-lens, four part of multi-beam Rotman lens, characteristics of conformal micro-strip antenna array and conformal floor, wherein di-lens is covered on characteristics of conformal micro-strip antenna array, characteristics of conformal micro-strip antenna array is placed on conformal floor, is fed by multi-beam Rotman lens to characteristics of conformal micro-strip antenna array.By covering the di-lens of quasi- conformal optics transformation on characteristics of conformal array, characteristics of conformal battle array is equivalent to the planar array of Virtual Space, the Discontinuous permittivities distribution applicating medium punching periodic structure converted is realized.Multi-beam Rotman lens are the multi-beam feeding network of antenna, are made of medium substrate, the deposited copper plane for being formed in the base lower surface, input port, output port, empty port, the deposited copper lens cavity for being formed in the upper surface of base plate and the transmission line for connecting lens and conformal array.The present invention can form 7 wave beams that coverage area is -45 °~+45 °.
Description
Technical field
The invention belongs to comprehensive multibeam technique field and antenna technical fields, are based on optical transform more particularly, to one kind
The conformal lens antenna of the multi-beam of method.
Background technique
In modern radar, communication system, antenna is often needed to have the function of beam scanning and multi-beam characteristic.Multi-beam skill
Art can greatly improve covering radiant power and channel capacity, maximally utilise frequency spectrum resource to realize, this just makes
It is obtained to be widely used in fields such as navigation, communication, detections.
Multibeam antenna specifically includes that three beam-forming network, phase shifter and aerial array parts.Wherein beam forming
Network can be divided into two class of matrix class and lens class.Typical matrix class beam-forming network is butler matrix, because of its size
Greatly, structure is complicated, processing cost is high, and application is not extensive.Typical lens class beam-forming network be by Rotman and
Luo Deman (Rotman) lens that Turner was proposed in 1963, its structure is relatively easy, and is easier to realize large-angle scanning, because
This present invention finally uses feeding network of the Luo Deman lens as entire antenna.
Current multibeam antenna is linear array mostly, and the requirement at this point for Luo Deman lens is as follows: when center is defeated
When inbound port motivates, each output realizes constant amplitude, equiphase current distribution；It is each when the excitation of remaining input terminal mouth
Constant amplitude, the current distribution of equiphase difference are realized at output；If conformal array, since unitary space position distribution is non-homogeneous, lead
Cause the not equiphase that introducing is additional between adjacent cells poor, Luo Deman lens need phase in each output amplitude distribution at this time
Deng, and output phase needs are modified.
In July, 2018, Yi Liu et al. human hair table " A Multibeam Cylindrically Conformal Slot
Array Antenna Based on a Modified Rotamn Lens ", devise a multi-beam characteristics of conformal lap gating system
Array antenna, they use forms the shape of array antenna for plane Luo Deman lens altogether, and increases additional compensation phase section
Phase only pupil filter is carried out, to realize required requirement.In fact, this is because compared to linear array, in the adjacent list of conformal array
Different space quadratures is introduced between member, so the step for increasing additional phase compensation section can not be default.Together
When due to needing the Luo Deman lens by plane to be bent, so more stringent requirements are proposed for the technology of processing, and
Workable material is defined, for example needs to use the preferable material of flexibility as far as possible.
The present invention realizes Virtual Space line array and physical space conformal array by the overwrite media lens on conformal array
It is equivalent so that it can realize the conformal array of multi-beam with the multiple beam forming network of linear array.Designed di-lens according to
According to quasi- conformal optics shift theory realize, quasi- conformal optics transformation theory be Jensen et al. in 2008 in optical transformation theory
On the basis of propose, using maxwell equation group in spatial alternation formal fixity, obtain the electromagnetism material of transformation space
Expect parameter, any regulation of electromagnetic wave is realized with this.The complexity of electromagnetic material has been evaded in the appearance of this technology simultaneously, can be with
Realize the isotropism and low loss characteristic of transformation space electromagnetic material.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of conformal lens antenna of optical transform multi-beam,
In overwrite media lens on conformal array, the amplitude and phase of the feed of equivalent linear array can be used directly, save
It is previous when designing conformal array for the optimization process of feed.
Technical solution
A kind of conformal lens antenna of optical transform multi-beam, it is characterised in that saturating including di-lens, multi-beam Rotman
Mirror, characteristics of conformal micro-strip antenna array and conformal floor；Characteristics of conformal micro-strip antenna array is located at below di-lens, is situated between
Matter lens surround, and characteristics of conformal micro-strip antenna array and di-lens are all placed on conformal floor, multi-beam Rotman lens
Positioned at the side on conformal floor；The di-lens is stair-stepping dielectric-slab, and lower surface is and characteristics of conformal microstrip antenna
The arc-shaped of array cooperation, is equipped with several through-holes on dielectric-slab, different according to the size of through-hole, is classified as multiple regions
To form the non-uniform Distribution that dielectric constant is 1~1.97；The characteristics of conformal microstrip antenna array is classified as is positioned at central angle
8 yuan of slot-coupled micro-strip array antennas on 60 ° of cylindrical surface, each slot-coupled microband antenna unit successively wrap under upper
First medium layer, second dielectric layer, third dielectric layer, the 4th dielectric layer are included, is equipped with radiation patch in the upper surface of first medium layer
Piece, the upper surface of third dielectric layer cover copper and are provided with rectangular aperture, and the lower surface of third dielectric layer is equipped with feeder line, the 4th medium
The lower surface of layer is reflection floor；The conformal floor is the convex structure cooperated with characteristics of conformal micro-strip antenna array；
The multi-beam Rotman lens are the dielectric-slab that side is radian, are equipped with coat of metal lens cavity in the upper surface of dielectric-slab
Body, coat of metal lens cavity are connected by input port and are motivated, and coat of metal lens cavity is connected by transmission line, output port
The feeder line of seam gap coupled microstrip antenna unit, coat of metal lens cavity pass through empty port connection load, the following table of dielectric-slab
Copper is applied in face.
The dielectric constant of the dielectric-slab of the di-lens is 2.65, loss tangent 0.002.
The dielectric constant of the substrate of the multi-beam Rotman lens is 2.65, with a thickness of 1mm.
The dielectric constant of the first medium layer and third dielectric layer is 2.65.
The dielectric constant of the second dielectric layer and the 4th dielectric layer is 2.2.
Beneficial effect
Present invention overwrite media lens on conformal array, approximation realize Virtual Space line array and physical space conformal array
It is equivalent, the Luo Deman lens that enable it to be used in linear array realize the conformal array of multi-beam, and Luo Deman lens application is omitted
In the optimization process of the feed of the amendment step and general conformal array of conformal array.At the same time, the application of di-lens can
To improve gain.Luo Deman lens are used as the feeding network of conformal array, and -45 °~+45 ° of 7 wave covers may be implemented
Scanning range, and the overlapping level between adjacent beams is entirely below 3dB.
Detailed description of the invention
Fig. 1 is the overall structure figure of inventive antenna
Fig. 2 is the dielectric constant distribution map of the di-lens domain transformation of inventive antenna
Fig. 3 is the structure chart of the di-lens of inventive antenna
Fig. 4 is the structure chart of the Rotman lens of inventive antenna
Fig. 5 is the cellular construction figure of the conformal array of inventive antenna
Fig. 6 is the conformal floor figure of inventive antenna: (a) top view, (b) main view
Fig. 7 is voltage standing wave ratio, insertion loss, amplitude distribution and the phase of the emulation of the Rotman lens of inventive antenna
Bit distribution curve graph
Fig. 8 be the emulation of the entire aerial array of inventive antenna Rotman lens difference input port excitation under in
Antenna pattern under heart frequency point 3GHz
Fig. 9 is the Rotman lens difference input port of the emulation for removing the di-lens linear array day after tomorrow of inventive antenna
The antenna pattern under center frequency point 3GHz under excitation
Figure 10 is under the Rotman lens difference input port excitation of the actual measurement of the entire aerial array of inventive antenna
Antenna pattern under center frequency point 3.0GHz frequency
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
As shown in Figure 1, inventive antenna includes di-lens 1, Rotman lens 2, conformal array 3 and conformal floor 4.Altogether
Shape array 3 is located at the lower section of di-lens 1, is surrounded by di-lens 1, and conformal array 3 and di-lens 1 be all placed in it is conformal
On floor 4, fixed by medium screw；Rotman lens 2 are located at the side on conformal floor 4.
As shown in Fig. 2, the dielectric constant of 1 domain transformation of di-lens of inventive antenna is distributed, the distribution according to this figure
Carry out actual implementation di-lens.
As shown in figure 3, the di-lens 1 of inventive antenna is designed according to quasi- conformal transformation principle, completely by medium block
It is made, there are many through-hole, the difference according to punching size can be divided into region I, region II, region III, region IV, region
V, region VI, region VII, region VIII and region IX, wherein different punching sizes corresponds to different effective dielectric constants,
And the distribution of the dielectric constant in each region is acquired according to optical transform；Top is arranged into a ladder, envisaged underneath at arc-shaped, with
3 phase of conformal array of lower section is fitted；1 both sides of di-lens have part outstanding to be connected with conformal floor 4.Di-lens 1 is to be situated between
The non-uniform Distribution that electric constant is 1.2~1.97, uses in dielectric constant as on the medium mainboard that 2.2, loss tangent is 0.002
It is punched to realize.
As shown in figure 4, the Rotman lens 2 of inventive antenna by medium substrate, be formed in the deposited copper of the base lower surface
Plane, input port 5, output port 6, empty port 7, the coat of metal lens cavity 8 for being formed in the upper surface of base plate and company
The transmission line 9 for connecing lens and conformal array forms.Input port 5, the coat of metal lens cavity for being formed in the upper surface of base plate
8, the transmission line 9 and output port 6 of empty port 7, connection lens and conformal array have collectively constituted the upper table of the Rotman lens
Face coat of metal planar lens, wherein 7 input ports are connected with excitation, the feeder line of 8 output ports and conformal array is direct
It is connected, 8 empty ports are connected with 50 ohm of matched loads, and output end 6 and the feeder line of conformal array are vertically connected.Described
The dielectric constant of the substrate of Rotman lens 2 is 2.65, with a thickness of 1mm, forms 7 wave beams that scanning range is -45 °~+45 °.
Two kinds of different medium structures that the characteristics of conformal array 3 is 2.65 using dielectric constant and dielectric constant is 2.2
It builds, being integrally located at radius is 600mm, and central angle is on 60 ° of cylindrical surface.By loading optics on the characteristics of conformal array
Transform lens are equivalent to virtual plane array.Conformal array 3 is using slot-coupled microband paste as group array element；Such as
Shown in Fig. 5, the chip unit of inventive antenna includes four layers of dielectric layer, that is, first medium layer 10, second dielectric layer 11, third Jie
Matter layer 12, the 4th dielectric layer 13, radiation patch 14, rectangular aperture 15, feeder line 16 reflect floor 17, dielectric posts 18.Second medium
Layer 11 and the 4th dielectric layer 13 are the medium block of dielectric constant 2.2, and first medium layer 10 and third dielectric layer 12 are dielectric constant
2.65 dielectric-slab, four-layer structure, which is successively interted, places, and the first medium layer 10 of top layer is that 10 single side of thin-medium plate covers copper, in
Second dielectric layer 11 and the 4th dielectric layer 13 are placed by layer and lower layer, and third dielectric layer 12 is placed among two layers of medium block, and third is situated between
12 double-sided copper-clad of matter layer is provided in 12 upper floor of feeder line dielectric-slab as rectangular aperture 15, and 12 lower layer of third dielectric layer is feeder line
16；Radiation patch 14 is located at the upper surface of first medium layer 10；Reflection floor 17 is located at below the 4th dielectric layer 13.Four-layer structure
It all opens there are four through-hole, connects chip unit and conformal floor using dielectric posts 18.
As shown in fig. 6, the conformal floor 4 of inventive antenna uses arc structure, it is provided with gap thereon as feeding network
Installation section, be equipped with 44 holes on conformal floor 4, be divided into hole i, hole ii and hole iii three parts, hole i is used for and conformal array 3
It is attached fixation, hole ii is used to be attached fixation with di-lens 1, and hole iii is for fixing conformal floor when testing.
Following antenna example is provided according to the above structure present invention:
Di-lens is made of the medium block of dielectric constant 2.2,360 × 107.3 × 50mm of overall dimension3, cell block ruler
Very little is 10 × 10mm2。
Chip unit is made of the dielectric-slab of the medium block of dielectric constant 2.2 and dielectric constant 2.65 and covers copper face structure
At two pieces of medium block thickness that dielectric constant is 2.2 are respectively 8.5mm and 7mm, two pieces of medium plate thickness that dielectric constant is 2.65
Degree is 1mm, and dielectric-slab is having a size of 60 × 39.6mm2, having radius in the sub- surrounding of each laminate is the through-hole of 1mm, two layers of medium
Good conductive metal material is all covered on plate, such as aluminium or copper.
Conformal floor is made of good conductive metal material, with a thickness of 4mm, whole size be 435.3mm ×
100mm.The gap of 7mm wide, 400mm long are provided on conformal floor, for placing Rotman lens, and different junctions are provided with ruler
Very little different hole, if the radius of hole i and hole ii are 1mm, the radius of hole iii is 2.5mm.Wherein medial arc part is provided with along diameter
Be used to be attached fixation with conformal array 3 to the hole i in direction, and the hole ii vertical with aperture be used for di-lens 1 into
Row is connected and fixed；Two side portions are provided with hole iii for fixing conformal floor when testing.
Rotman lens by medium substrate, the deposited copper plane for being formed in the base lower surface, input port, output port,
Empty port is formed in the coat of metal lens cavity of the upper surface of base plate and the transmission line composition of connection lens and conformal array.
Input port, the coat of metal lens cavity for being formed in the upper surface of base plate, empty port, the transmission for connecting lens and conformal array
Line and output port have collectively constituted the upper surface coat of metal planar lens of the Rotman lens, wherein 7 input ports with
Excitation is connected, and the feeder line of 8 output ports and conformal array is connected directly, and 8 empty ports are connected with 50 ohm of matched loads.
Advantages of the present invention can be further illustrated by following emulation:
1, emulation content
Using simulation software to the Rotman lens of embodiment and voltage standing wave ratio, insertion loss, the amplitude point of antenna
Cloth, phase distribution and directional diagram are emulated.
2, simulation result and measured result
Fig. 7 is voltage standing wave ratio, insertion loss, amplitude distribution and the phase emulated to the Rotman lens of embodiment
Bit distribution curve graph.It can be seen from figure 7 that Rotman lens of the invention under conditions of voltage standing wave ratio is less than 2, work
Frequency can cover 2.8~3.2GHz, meet requirement；And its insertion loss is less than 3dB in entire frequency band；Furthermore from it
The amplitude distribution and phase distribution curve graph of output port are it can be found that the Rotman invented when different input ports motivate
The amplitude distribution of lens reaches unanimity, and linear distribution is presented in phase, meets the requirements.
Fig. 8 is the face the H directional diagram emulated to embodiment antenna, is that the Rotman lens difference of center frequency point 3GHz is defeated
Antenna pattern under inbound port excitation.From figure 8, it is seen that 7 can be formed when 7 input ports are motivated respectively not
Same wave beam, respectively -45 °, -30 °, -15 °, 0 °, 15 °, 30 °, 45 °；7 wave beams most increases at center frequency point 3GHz
Benefit is 14.55GHz to 14.97GHz；The overlapping level of adjacent beams is entirely below 3dB.Prove invented Rotman lens with
When conformal array is disposed vertically, it can be good at realizing multi-beam function.
Fig. 9 is to the face the H directional diagram for removing the embodiment antenna after di-lens and emulating, and is center frequency point 3GHz's
Antenna pattern under the excitation of Rotman lens difference input port.From fig. 9, it can be seen that when 7 input ports are swashed respectively
It can form 7 different wave beams when encouraging, respectively -47 °, -32 °, -16 °, 0 °, 16 °, 32 °, 47 °；In center frequency point 3GHz
The maximum gain for locating 7 wave beams is 12.35GHz to 13.12GHz；And the overlapping level of adjacent beams at this time is without all low
In 3dB.It is compared with Fig. 8 it can be found that the scanning range of the wave beam of entire antenna becomes larger after di-lens removes,
But the gain of each wave beam is smaller than in the presence of di-lens.
Figure 10 is the face the H directional diagram obtained to embodiment antenna measurement, and by itself and the simulation result under same frequency point
Comparison, from fig. 10 it can be seen that 7 different wave beams can be formed when 7 input ports are motivated respectively, respectively-
45 °, -30 °, -15 °, 0 °, 15 °, 30 °, 45 °；The maximum gain of 7 wave beams arrives at center frequency point 3GHz for 13.55GHz
14.86GHz；The overlapping level of adjacent beams is entirely below 3dB.The simulation result of designed antenna and test result it is basic
It is completely the same, it was demonstrated that the multi-beam conformal antenna validity invented.
Claims (5)
1. a kind of conformal lens antenna of optical transform multi-beam, it is characterised in that saturating including di-lens (1), multi-beam Rotman
Mirror (2), characteristics of conformal micro-strip antenna array (3) and conformal floor (4)；Characteristics of conformal micro-strip antenna array (3) is located at medium
It below lens (1), is surrounded by di-lens (1), characteristics of conformal micro-strip antenna array (3) and di-lens (1) are all placed in altogether
On shape floor (4), multi-beam Rotman lens (2) are located at the side on conformal floor (4)；The di-lens (1) is ladder
The dielectric-slab of shape, lower surface are the arc-shaped cooperated with characteristics of conformal micro-strip antenna array (3), are equipped with several on dielectric-slab
Through-hole, it is different according to the size of through-hole, multiple regions are classified as to form the non-uniform Distribution that dielectric constant is 1~1.97；
The characteristics of conformal micro-strip antenna array (3) is 8 yuan of slot-coupled microstrip array on the cylindrical surface that central angle is 60 °
Antenna, each slot-coupled microband antenna unit successively include first medium layer (10), second dielectric layer (11), the under upper
Three dielectric layers (12), the 4th dielectric layer (13) are equipped with radiation patch (14) in the upper surface of first medium layer (10), third medium
The upper surface of layer (12) is covered copper and is provided with rectangular aperture (15), and the lower surface of third dielectric layer (12) is equipped with feeder line (16), the
The lower surface of four dielectric layers (13) is reflection floor (17)；The conformal floor (4) is and characteristics of conformal micro-strip antenna array
(3) convex structure cooperated；The multi-beam Rotman lens (2) are the dielectric-slab that side is radian, in dielectric-slab
Upper surface is equipped with coat of metal lens cavity (8), and coat of metal lens cavity (8) passes through input port (5) connection excitation, metal
Coating lens cavity (8) passes through transmission line (9), the feeder line of output port (6) connection gap coupled microstrip antenna unit, metal-plated
Layer lens cavity (8) passes through empty port (7) and connects load, and copper is applied in the lower surface of dielectric-slab.
2. a kind of conformal lens antenna of optical transform multi-beam according to claim 1, it is characterised in that the medium
The dielectric constant of the dielectric-slab of lens (1) is 2.65, loss tangent 0.002.
3. a kind of conformal lens antenna of optical transform multi-beam according to claim 1, it is characterised in that more waves
The dielectric constant of the substrate of beam Rotman lens (2) is 2.65, with a thickness of 1mm.
4. a kind of conformal lens antenna of optical transform multi-beam according to claim 1, it is characterised in that described first
The dielectric constant of dielectric layer (10) and third dielectric layer (12) is 2.65.
5. a kind of conformal lens antenna of optical transform multi-beam according to claim 1, it is characterised in that described second
The dielectric constant of dielectric layer (11) and the 4th dielectric layer (13) is 2.2.
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| CN110690584A (en) * | 2019-10-23 | 2020-01-14 | 湖南国科锐承电子科技有限公司 | Low-profile broadband wide-angle cylindrical surface conformal multi-beam microstrip array antenna |
| CN110690584B (en) * | 2019-10-23 | 2024-06-25 | 湖南国科锐承电子科技有限公司 | Low-profile wide-bandwidth cylindrical conformal multi-beam microstrip array antenna |
| TWI715343B (en) * | 2019-12-10 | 2021-01-01 | 中華電信股份有限公司 | Antenna device based on modified rotman lens |
| CN112366459A (en) * | 2020-10-29 | 2021-02-12 | 中国电子科技集团公司第二十研究所 | Integrated active multi-beam Rotman lens antenna |
| CN113328244A (en) * | 2021-05-27 | 2021-08-31 | 中国电子科技集团公司第十八研究所 | End-fire conformal photovoltaic antenna based on curved surface structure |
| CN113328244B (en) * | 2021-05-27 | 2022-12-23 | 中国电子科技集团公司第十八研究所 | End-fire conformal photovoltaic antenna based on curved surface structure |
| CN113363731A (en) * | 2021-06-03 | 2021-09-07 | 中国电子科技集团公司第二十九研究所 | Low-profile and low-loss Rotman lens |
| CN113363731B (en) * | 2021-06-03 | 2022-04-12 | 中国电子科技集团公司第二十九研究所 | Low-profile and low-loss Rotman lens |
| CN114927881A (en) * | 2022-05-30 | 2022-08-19 | 中国电子科技集团公司第二十九研究所 | Broadband two-dimensional multi-beam lens antenna |
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