CN109687163A - Restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures - Google Patents
Restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures Download PDFInfo
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- CN109687163A CN109687163A CN201811517097.8A CN201811517097A CN109687163A CN 109687163 A CN109687163 A CN 109687163A CN 201811517097 A CN201811517097 A CN 201811517097A CN 109687163 A CN109687163 A CN 109687163A
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- metal patch
- magnetic conductor
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- artificial magnetic
- small polygon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption
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Abstract
The invention discloses a kind of restructural phase-modulation screens based on three frequency Artificial magnetic conductor structures, pass through the current distribution on " logical " and " disconnected " control metal patch of PIN diode, so that periodic unit is in different Frequency points, it realizes its switching between same phase is reflected and reflected, and then realizes above-mentioned periodic structure at different Frequency points to the absorption of incident electromagnetic wave.In different working frequency range, " be connected " in one cycle by independent control PIN diode shared by time ratio, i.e. duty ratio realizes the function of freely being regulated and controled to the characteristic of multiple frequency ranges.The Artificial magnetic conductor structure that the present invention uses, structure is simple, easy to process, and thickness, much than being less than 1/10th of operation wavelength, volume and cost substantially reduce.
Description
Technical field
The invention belongs to technical field of microwave circuits more particularly to a kind of based on the restructural of three frequency Artificial magnetic conductor structures
Phase-modulation screen.
Background technique
(radar cross section, RCS) is the echo that target generates under the irradiation of radar wave in radar reflection section
A kind of physical quantity of intensity, when target size is bigger, radar cross section is also bigger.RCS is usually widely used in military war, especially
It is its radar exploration technique and radar stealth technology.As the demand to stealth technology is higher and higher, low RCS material is by more
Carry out more concerns.The stealth technology of relatively broad application includes appearance modification, electromagnetism cancellation techniques, radar absorbing
(Radar Absorbing Material, RAM) etc..Electromagnetic wave energy is converted electric energy by radar absorbing, to reduce
Energy reflects up to stealthy demand.
The concept of phase-modulation is introduced into microwave and inhaled by later period the 1990s, Chambers professor and professor Tenant
In the design of acceptor.Different from aforementioned stealthy mechanism, the microwave-absorbing body based on phase modulation technique is to incident electromagnetic wave
Energy carry out frequency on offset, guarantee reflection signal fall in except radar receiver free transmission range, to realize low reflection
Rate.Traditional phase-modulation screen be by metal plate, quarter-wave medium interlayer and period patch array composition, thickness compared with
It is thick.Therefore, the developing direction of stealth material is: thickness is thin, light-weight, and absorption band is wide etc..
Artificial magnetic conductor (Artificial Magnetic Conductor, AMC) is used as a kind of Meta Materials, has in spy
Determine that the electromagnetic property with mutually reflection is presented to plane wave in frequency range.Common metal ground plane is as Low ESR face, reflection
Rate R=-1, and artificial magnetic conductor has very high impedance and reflectivity R=+1, has and is in plane wave in particular frequency range
Now with the electromagnetic property of mutually reflection, and material thickness is effectively reduced, there is very big progress at stealthy aspect.
But general AMC is limited with phase reflection bandwidth and only one Frequency point.Therefore, in order to reach preferably it is hidden
Body effect realizes that multifrequency AMC is of great significance.There are many kinds of multifrequency AMC design methods, including the selection of multilayer frequency surface
Surface (FSS), disturbance plane AMC, high order resonance and GA technology, plane is the same as lamination AMC.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes a kind of restructural phase based on three frequency Artificial magnetic conductor structures
Position modulation screen, changes AMC with the position of phase reflection point by controlling the switch state of PIN diode, may be implemented to radar
Stealthy effect has multiple frequency points, be free to switch, and working frequency range is not interfere with each other.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: the three artificial magnetic conductance of frequency of one kind
Body structure, the artificial magnetic conductor unit 17 including two-dimension periodic arrangement, 17 central symmetry of artificial magnetic conductor unit, including it is upper
Layer patch, intermediate medium substrate 15 and underlying metal ground 16, the upper layer patch include the big polygon positioned at center
The small polygon metal patch of metal patch 1 and four angles, is printed on medium substrate 15, and passes through plated-through hole and metal
Ground 16 is connected；And it is connected between big polygon metal patch 1 and small polygon metal patch by four PIN diodes.
Further, the big polygon metal patch 1 is connected by plated-through hole 2 with Metal ground 16, and described four
A small polygon metal patch, the first small polygon metal patch 7, the second small polygon metal patch 8, the small polygon gold of third
Belong to patch 9, the 4th small polygon metal patch 10 passes through 11, the 2nd 4 points of the first a quarter cylinder plated-through hole respectively
One of cylindrical metal through-hole 12, third a quarter cylinder plated-through hole 13, the 4th a quarter cylinder plated-through hole
14 are connected with Metal ground 16.
Further, the big polygon metal patch 1 is square and adds the rectangular solid of one fixed width in surrounding
Patch.
Further, the first small polygon metal patch 7, the second small polygon metal patch 8, the small polygon metal of third
Patch 9 and the 4th small polygon metal patch 10 are small square and add the rectangular solid patch of one fixed width in side.
Further, the described first small polygon metal patch 7, the second small polygon metal patch 8, the small polygon of third
Metal patch 9 and the 4th small polygon metal patch 10 are four identical metal patches of shape, and placing direction is different, often
One small polygon metal patch can be adjacent thereto three periodic units in small polygon metal patch, constitute one it is complete
Whole centrosymmetric small polygon metal patch 18.
Further, the both ends of the PIN diode are equipped with the metal patch with its package dimension same size.
Further, four PIN diodes are the first PIN diode 3, the second PIN diode 4, bis- pole the 3rd PIN
Pipe 5 and the 4th PIN diode 6 are respectively welded at four small polygon metal patch 7, small polygon metal patch 8, small polygon
Between shape metal patch 9, small polygon metal patch 10 and metal patch 1, and it is all located above medium substrate 15.
Further, projected length of the small polygon patch 18 on 17 diagonal line extended line of artificial magnetic conductor unit, gold
Belong to the sum of the projected length and single PIN diode length of patch 1 on 17 diagonal line of artificial magnetic conductor unit and is equal to artificial magnetic
The catercorner length of conductor element 17.
Further, the first a quarter cylinder plated-through hole 11, the second a quarter cylinder plated-through hole
12, third a quarter cylinder plated-through hole 13 and the 4th a quarter cylinder plated-through hole 14 are with same cross-sectional shape
The quadrant of shape, placing direction is different, three periods that each quadrant plated-through hole can be adjacent thereto
Quadrant plated-through hole in unit constitutes a complete cylinder, positioned at the centre bit of small polygon metal patch 18
It sets, radius is identical as 2 radius of plated-through hole.
Further, artificial magnetic conductor unit 17 carries out two-dimension periodic arrangement with square form crystal lattice.
A kind of restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures, it is intermediate when PIN diode disconnects
Big polygon metal patch generates resonance at low-frequency range, and the small polygon metal patch at four angles generates humorous at high band
Vibration；When PIN diode closure, big polygon metal patch and four small polygon metal patch constitute an entirety, the
Resonance occurs at three Frequency points；By controlling the switch state of PIN diode, three frequency Artificial magnetic conductor structures can be at three
At frequency, realize incidence wave with the switching of mutually reflection and antiphase reflection；At different frequency ranges, pass through bis- pole independent control PIN
The duty ratio of pipe conducting, independent control phase-modulation screen make it in three frequency bands the assimilation effect of three frequency range incidence waves
Free switching.
The utility model has the advantages that the present invention using the above scheme in artificial magnetic conductor, can realize in two frequencies with mutually reflecting,
And by the switch of control PIN diode, increases a frequency to realize with mutually reflecting, realize multifrequency and free switching.This hair
It is bright using the above scheme in artificial magnetic conductor, the duty ratio be connected by independent control PIN diode being capable of independent control phase
Position modulation screen can efficiently control each frequency range, reach stealth effect, adjustability to the assimilation effect of three frequency range incidence waves
By force.The present invention is about 1/10th of operation wavelength using the overall thickness of medium substrate, compared with traditional phase-modulation screen,
Thickness reduces 60%.
Detailed description of the invention
Fig. 1 is that the present invention is based on the operation principle schematic diagrams of the phase-modulation screen of three frequency Artificial magnetic conductor structures；
Fig. 2 is the top view of three frequency Artificial magnetic conductor structures of the invention；
Fig. 3 is the schematic three dimensional views of artificial magnetic conductor unit of the present invention；
Fig. 4 is the top-level schematic of artificial magnetic conductor unit of the present invention；
Fig. 5 is the side view of the metal throuth hole of artificial magnetic conductor unit of the present invention；
Fig. 6 is phase-modulation screen of the present invention when PIN diode is "ON" and "Off" two states, the phase of reflection coefficient
Curve graph；
It is 10% that Fig. 7, which is phase-modulation screen of the present invention in duty ratio, and when 30%, 50%, 70%, 90%, each frequency range is inhaled
The curve graph of receipts value；
Fig. 8 is the curve graph that phase-modulation screen of the present invention is 100% in each frequency range absorption value.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in Figure 1, the phase-modulation screen of the present invention based on the building of three frequency Artificial magnetic conductor structures is, it can be achieved that electricity
The stealthy method of magnetic wave, by " logical " of PIN diode and the current distribution of " disconnected " control patch, so that periodic unit exists
Different Frequency points realizes its switching between same phase is reflected and reflected, and then realizes above-mentioned periodic structure in different frequencies
Absorption at rate point to incident electromagnetic wave.
When PIN diode disconnects, intermediate big polygon metal patch generates resonance at low-frequency range, four angles it is small
Polygon metal patch generates resonance at high band；When PIN diode closure when, big polygon metal patch and four it is small more
Side shape metal patch constitutes an entirety, and resonance occurs at third Frequency point.By control PIN diode " logical " and
" disconnected ", three frequency Artificial magnetic conductor structures can realize the switching to incidence wave with mutually reflection and antiphase reflection at three frequencies.
At different frequency ranges, the duty ratio be connected by independent control PIN diode being capable of independent control phase-modulation
Shield the assimilation effect to three frequency range incidence waves, each frequency range can be efficiently controlled, allowed in three frequency band freedom
Switching.
As shown in Fig. 2, three frequency Artificial magnetic conductor structures carry out two by several centrosymmetric artificial magnetic conductor units 17
Tie up period arrangement composition.As shown in figure 3, each artificial magnetic conductor unit 17 is by upper layer metal patch, it include four small polygons
Metal patch and big polygon metal patch 1, intermediate medium substrate 15, Metal ground 16, PIN diode group are constituted.Pass through
The "ON" and "Off" two states of the PIN diode of artificial magnetic conductor unit are controlled, so that incident electromagnetic wave is in work frequency
Respectively it is in " antiphase reflection " and " with mutually reflecting " two states at rate, the conversion of multifrequency may be implemented.
As shown in figure 3, the artificial magnetic conductor in artificial magnetic conductor unit 17 is centrosymmetric big polygon metal patch 1
With the first small polygon metal patch 7 to lie around, the second small polygon metal patch 8, the small polygon metal patch of third
9, the 4th small polygon metal patch 10, and it is printed on 15 top of medium substrate, Metal ground 16 is arranged in bottom surface.Frequency is adjustable
Artificial magnetic conductor unit 17 carries out periodic arrangement in the form of square lattice.Big polygon metal patch and four angles it is small polygon
Shape metal patch, the gold by the plated-through hole at unit center position, across the lower surface of medium substrate and medium substrate
Possession face 16 connects, and so as to which resonance occurs at one high and one low two Frequency points, i.e., realizes at the two frequencies to entering
The same phase of ejected wave reflects.
As shown in figure 5, big polygon metal patch 1 is connected by plated-through hole 2 with Metal ground 16, four small metals
In patch, the first small polygon metal patch 7, the second small polygon metal patch 8, the small polygon metal patch 9 of third and
Four small polygon metal patches 10 pass through the first a quarter cylinder plated-through hole 11, the second a quarter cylinder metal respectively
Change through-hole 12, third a quarter cylinder plated-through hole 13, the 4th a quarter cylinder plated-through hole 14 and Metal ground
16 are connected.
As shown in figure 4, PIN diode group is by the first PIN diode 3, the second PIN diode 4,5 and of third PIN diode
4th PIN diode 6 composition, is respectively welded at four small polygon metal patch 7, small polygon metal patch 8, small polygon
Between metal patch 9, small polygon metal patch 10 and big polygon metal patch 1, and it is all located at the upper of medium substrate 15
Face.The both ends of PIN diode are equipped with the metal patch with its package dimension same size.The permittivity ε of medium substrate 15rFor
2.2~10.2, with a thickness of 4mm, about 0.08* λg, wherein λg=λ0/εr^0.5, λ0For the first resonance point free space wave
It is long.
Big polygon metal patch 1 is square and adds the rectangular solid patch of one fixed width, Zhou Changwei in surrounding
λeff/ 2, wherein λeff=λ0/(εr+ 1) ^0.5, λ0For the wavelength of free space.Plated-through hole 2 runs through medium substrate 15, partly
Diameter is the one third of overall thickness.
First small polygon metal patch 7, the second small polygon metal patch 8, the small polygon metal patch 9 of third and
Four small polygon metal patches 10 are small square and add the rectangular solid patch of one fixed width in side.
First small polygon metal patch 7, the second small polygon metal patch 8, the small polygon metal patch 9 of third and
Four small polygon metal patches 10 are four identical metal patches of shape, but the direction put is different, each is small
Polygon metal patch can be adjacent thereto three periodic units in small polygon metal patch, constitute one it is complete in
The symmetrical small polygon metal patch 18 of the heart, as shown in Figure 2.
Projection of the centrosymmetric small polygon metal patch 18 on the cornerwise extended line of artificial magnetic conductor unit 17
Length, with projected length of the centrosymmetric big polygon metal patch 1 on 17 diagonal line of artificial magnetic conductor unit, Yi Jidan
The sum of length of a PIN diode (including reserved weld length), equal to the catercorner length of artificial magnetic conductor unit 17.
First plated-through hole 11, the second plated-through hole 12, third plated-through hole 13 and the 4th plated-through hole 14
It is present in medium substrate 15, their cross sectional shape-quadrants having the same, but the direction put is different, it is each
A plated-through hole can be adjacent thereto three periodic units in plated-through hole constitute a complete cylinder, each
Cylinder is all correspondingly positioned at the centre bit for the centrosymmetric small polygon metal patch 18 that four adjacent polygons patches are constituted
It sets；Their radius is identical as the radius of the first plated-through hole 2.
First PIN diode 11, the second PIN diode 12, third PIN diode 13 and the 4th PIN diode 14 type
It is number not unique, but the PIN diode that can be worked more than required radio frequency band must be selected.
The details to specific device of the invention and working condition carry out refinement explanation below.
By taking 6*6 unit as an example, the interface dimensions of the Artificial magnetic conductor structure based on the adjustable artificial magnetic conductor unit 17 of frequency
For 250mm*250mm, overall thickness 4mm, matter substrate the selection of material FR4, dielectric constant 4.4, Metal ground 16, which uses, covers copper.
Centrosymmetric metal patch 1 uses big polygon patch shape, and size is the square that side length is 21.5mm
And four side add the rectangle of long 16mm* wide 0.5mm, the radius of the first plated-through hole 2 is 1.5mm；First small polygon gold
Belong to the small polygon metal patch 9 of patch 7, the second small polygon metal patch 8, third and the 4th small polygon metal patch 10
Size is used to add the rectangular shape of long 4mm* wide 2mm for the small square and side of side length 6mm；Second plated-through hole
11, the radius of third plated-through hole 12, the 4th plated-through hole 13 and fifth metal through-hole 14 is 1.5mm；Bis- pole PIN
The model BAP64-02V of pipe.
Refering to what is shown in Fig. 6, calculated through numerical value, it is intermediate when being disconnected when the reverse bias voltage of PIN diode is greater than 10V
Multiform patch constitute the reflected phase point at low-frequency range 2.85GHz, the small multiform metal patch at four angles together constitutes
The reflected phase point of high band 4.3GHz；When being disconnected when the forward bias voltage of PIN diode is greater than 10V, entire patch structure
The reflected phase point for being 5.2GHz at frequency, realizes the free switching of three frequencies；Further, since whole thickness is less than very
One of wavelength, more traditional quarter-wave reduce very much, therefore using the technical solution it is largely effective.
Refering to what is shown in Fig. 7, calculating through numerical value, when duty ratio is 50%-70%, the absorption of first frequency point reaches
100%；When duty ratio is 70%-90%, the assimilation effect of second frequency point is best, close to 100%；When duty ratio is 30%-
When 50%, the assimilation effect of third frequency point is preferably 100%.
Refering to what is shown in Fig. 8, passing through the switch of independent control PIN diode, changes the duty ratio of each frequency range, obtain three
Frequency range is best as a result, absorptivity is all 100%.
Claims (11)
1. a kind of three frequency Artificial magnetic conductor structures, which is characterized in that the artificial magnetic conductor unit (17) including two-dimension periodic arrangement,
Artificial magnetic conductor unit (17) central symmetry, including upper layer patch, intermediate medium substrate (15) and underlying metal ground
(16), the upper layer patch includes the small polygon metal of the big polygon metal patch (1) and four angles positioned at center
Patch is printed on medium substrate (15), and is connected by plated-through hole with Metal ground (16)；And big polygon metal patch
It is connected between piece (1) and small polygon metal patch by four PIN diodes.
2. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that the big polygon metal patch
(1) it is connected by plated-through hole (2) with Metal ground (16), the four small polygon metal patch, the first small polygon
Metal patch (7), the second small polygon metal patch (8), the small polygon metal patch (9) of third, the 4th small polygon metal
Patch (10) passes through the first a quarter cylinder plated-through hole (11), the second a quarter cylinder plated-through hole respectively
(12), third a quarter cylinder plated-through hole (13), the 4th a quarter cylinder plated-through hole (14) and Metal ground
(16) it is connected.
3. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that the big polygon metal patch
(1) it is square and adds the rectangular solid patch of one fixed width in surrounding.
4. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that the first small polygon metal patch
(7), the second small polygon metal patch (8), the small polygon metal patch (9) of third and the 4th small polygon metal patch (10)
The rectangular solid patch of one fixed width is added for small square and in side.
5. three frequencies Artificial magnetic conductor structure according to claim 2, which is characterized in that the first small polygon metal patch
Piece (7), the second small polygon metal patch (8), the small polygon metal patch (9) of third and the 4th small polygon metal patch
It (10) is four identical metal patches of shape, placing direction is different, each small polygon metal patch can be with it
Small polygon metal patch in three adjacent periodic units constitutes a complete centrosymmetric small polygon metal patch
Piece (18).
6. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that the both ends of the PIN diode are set
There is the metal patch with its package dimension same size.
7. three frequencies Artificial magnetic conductor structure according to claim 2, which is characterized in that four PIN diodes are the
One PIN diode (3), the second PIN diode (4), third PIN diode (5) and the 4th PIN diode (6), are respectively welded at
Four small polygon metal patch (7), small polygon metal patch (8), small polygon metal patch (9), small polygon metal
Between patch (10) and metal patch (1), and it is all located at medium substrate (15) above.
8. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that small polygon patch (18) is artificial
Projected length, metal patch (1) on magnetic conductance body unit (17) diagonal line extended line is in artificial magnetic conductor unit (17) diagonal line
On projected length and the sum of single PIN diode length be equal to the catercorner length of artificial magnetic conductor unit (17).
9. three frequencies Artificial magnetic conductor structure according to claim 2, which is characterized in that the first a quarter cylinder gold
Categoryization through-hole (11), the second a quarter cylinder plated-through hole (12), third a quarter cylinder plated-through hole (13) and
4th a quarter cylinder plated-through hole (14) is the quadrant with same cross-sectional shape, and placing direction is different, often
One quadrant plated-through hole can be adjacent thereto three periodic units in quadrant plated-through hole structure
At a complete cylinder, it is located at the center of small polygon metal patch (18), radius and plated-through hole (2) radius phase
Together.
10. three frequencies Artificial magnetic conductor structure according to claim 1, which is characterized in that artificial magnetic conductor unit (17) with
Square form crystal lattice carries out two-dimension periodic arrangement.
11. a kind of restructural phase-modulation screen based on the three frequency Artificial magnetic conductor structures as described in claim 1-10, special
Sign is, when PIN diode disconnects, intermediate big polygon metal patch generates resonance at low-frequency range, four angles it is small
Polygon metal patch generates resonance at high band；When PIN diode closure when, big polygon metal patch and four it is small more
Side shape metal patch constitutes an entirety, and resonance occurs at third Frequency point；By the switch shape for controlling PIN diode
State, three frequency Artificial magnetic conductor structures can realize incidence wave with the switching of mutually reflection and antiphase reflection at three frequencies；
At different frequency ranges, the duty ratio be connected by independent control PIN diode, independent control phase-modulation screen is to three
The assimilation effect of frequency range incidence wave makes it in three frequency band free switchings.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517097.8A CN109687163A (en) | 2018-12-12 | 2018-12-12 | Restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517097.8A CN109687163A (en) | 2018-12-12 | 2018-12-12 | Restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures |
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| CN201811517097.8A Pending CN109687163A (en) | 2018-12-12 | 2018-12-12 | Restructural phase-modulation screen based on three frequency Artificial magnetic conductor structures |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137688A (en) * | 2019-07-11 | 2019-08-16 | 南京邮电大学 | Restructural wideband phase modulation screen based on artificial magnetic conductor |
| CN112164894A (en) * | 2020-08-31 | 2021-01-01 | 中通服咨询设计研究院有限公司 | X-waveband and S-waveband active reconfigurable frequency selection surface |
| CN116387841A (en) * | 2023-05-30 | 2023-07-04 | 南京邮电大学 | 1-bit electronically controlled reconfigurable transmission array antenna with three-dimensional frequency selective structure |
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| US6690327B2 (en) * | 2001-09-19 | 2004-02-10 | Etenna Corporation | Mechanically reconfigurable artificial magnetic conductor |
| US7071889B2 (en) * | 2001-08-06 | 2006-07-04 | Actiontec Electronics, Inc. | Low frequency enhanced frequency selective surface technology and applications |
| CN106972279A (en) * | 2017-03-30 | 2017-07-21 | 南京邮电大学 | The Artificial magnetic conductor structure of frequency-adjustable and its method for realizing phase-modulation screen |
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| US7071889B2 (en) * | 2001-08-06 | 2006-07-04 | Actiontec Electronics, Inc. | Low frequency enhanced frequency selective surface technology and applications |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137688A (en) * | 2019-07-11 | 2019-08-16 | 南京邮电大学 | Restructural wideband phase modulation screen based on artificial magnetic conductor |
| CN110137688B (en) * | 2019-07-11 | 2019-10-01 | 南京邮电大学 | Restructural wideband phase modulation screen based on artificial magnetic conductor |
| CN112164894A (en) * | 2020-08-31 | 2021-01-01 | 中通服咨询设计研究院有限公司 | X-waveband and S-waveband active reconfigurable frequency selection surface |
| CN112164894B (en) * | 2020-08-31 | 2022-01-14 | 中通服咨询设计研究院有限公司 | X-waveband and S-waveband active reconfigurable frequency selection surface |
| CN116387841A (en) * | 2023-05-30 | 2023-07-04 | 南京邮电大学 | 1-bit electronically controlled reconfigurable transmission array antenna with three-dimensional frequency selective structure |
| CN116387841B (en) * | 2023-05-30 | 2023-08-11 | 南京邮电大学 | 1-bit electronically controlled reconfigurable transmission array antenna with three-dimensional frequency selective structure |
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