l/c dual-band dual-polarized shared aperture array
DESCRIPTION
L/C Dual-Band Dual-Polarized Shared Aperture Array. COMP 901 / ITEC 810 Final Report Author: Zhu SUN (42251087) Supervisor:Prof. Karu Esselle Date:13/06/2012. Outline. Introduction Theoretical Analysis L/C-DBDP Half Perforated Unit Cell L/C-DBDP Overlapped Unit Cell - PowerPoint PPT PresentationTRANSCRIPT
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L/C Dual-Band Dual-PolarizedL/C Dual-Band Dual-PolarizedShared Aperture ArrayShared Aperture Array
COMP 901 / ITEC 810 Final ReportCOMP 901 / ITEC 810 Final Report
Author: Author: Zhu SUN (42251087)Zhu SUN (42251087)Supervisor:Supervisor: Prof. Karu EsselleProf. Karu EsselleDate:Date: 13/06/201213/06/2012
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OutlineOutline
IntroductionIntroduction Theoretical AnalysisTheoretical Analysis L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array ConclusionConclusion
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IntroductionIntroduction--Background--Background
Fig.2Fig.2 Space- & Air-Borne case Space- & Air-Borne case
Fig.1Fig.1 Base station antenna Base station antenna
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IntroductionIntroduction--Literature Review--Literature Review
Fig.3Fig.3 Perforated Patch [1] Perforated Patch [1]
Fig.5Fig.5 Interleaved Structure [3] Interleaved Structure [3]
Fig.4 Fig.4 Overlapped Structure [2]Overlapped Structure [2]
1. L. L. Shafai, W. A. Chamma, M. Barakat, P. C. Strickland, and G. Séguin, “Dual-band dual-polarized perforated microstrip antennas for SAR applications”, IEEE Trans. Antennas Propagat., vol. 48, no. 1, pp.58-66, Jan. 2000.
2. M. Moghaddam, et al, “A Dual Polarized UHF/VHF Honeycomb Stacked-Patch Feed Array for a Large-Aperture Space-borne Radar Antenna”, Aerospace Conf. 2007, pp.1-10
3. X. Qu, S.S. Zhong, Y.M. Zhang and W. Wang, “Design of an S/X dual-band dual-polarised microstrip antenna array for SAR applications”, IET Microw. Antennas Propag., vol.1, no.2, pp. 513–517, 2007.
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Theoretical AnalysisTheoretical Analysis --expression explanation (I)--expression explanation (I)
feed
Neutralized each other
Effective radiated current
Effective radiated current
Weak M-current
Fig.6Fig.6 Field Distribution & Equivalent M-current Field Distribution & Equivalent M-current
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Theoretical AnalysisTheoretical Analysis --expression explanation (II)--expression explanation (II)• Perforation has similar effect as shorten radiation edgePerforation has similar effect as shorten radiation edge• From Transmission Line Model, equivalent circuit From Transmission Line Model, equivalent circuit
parameters [4] can be written as:parameters [4] can be written as:
;;Q factor can be expressed as:Q factor can be expressed as:
, where, whereConclusion:Conclusion: bandwidth scales with bandwidth scales with radiation edge widthradiation edge width
2
3020
sin ( cos )1 sin
cos
w
G d
0
lCvZ
2
3020
sin ( cos )/ sin
cos
wLQ K dR
0
lKvZ
4. H.Pues, etal, “Accurate transmission-line model for the rectangular microstrip antenna”, Microwaves, Optics and Antennas, IEE Proceedings H, vol.131, no.6, pp.334-340
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Theoretical AnalysisTheoretical Analysis --simulation result (I)--simulation result (I)
h1
ht
p a
p b
ls
d
fw
h1
ht
p a
p b
ls
d
fw
p1 d2
h1
ht
p a
p b
ls
d
fw
p1 d2
p 2
d 3
Non-PerforatedNon-Perforated
Half-PerforatedHalf-Perforated Fully-PerforatedFully-Perforated
Fig.7Fig.7 Comparison of three structures Comparison of three structures
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Theoretical AnalysisTheoretical Analysis --simulation result (II)--simulation result (II)• Bandwidth decreases with the increase of perforationsBandwidth decreases with the increase of perforations
1.10 1.15 1.20 1.25 1.30 1.35 1.40-35
-30
-25
-20
-15
-10
-5
0R
etur
n Lo
ss /
(dB
)
Frequency / (GHz)
Non-perforation Half-perforation Full-perforation
Fig.8Fig.8 Simulated bandwidth of three structures Simulated bandwidth of three structures
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Configuration--Configuration
• Reduce Perforation NumberReduce Perforation Number
• Lower ProfileLower Profile
• Trade off in BandwidthTrade off in Bandwidth
• Moderate ComplexityModerate Complexity l1
l2
C2 d
C1
f1f2
C3
h1
h2
h3
h4
h5
h6
#A
#B
#C
#D
p
fw
Fig.9 Fig.9 Configuration of Configuration of ““half-perforated” unit cellhalf-perforated” unit cell
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Inter-band Coupling--Inter-band Coupling
0 1 1 2 5
-0j
0j
-1j
1j
-1j
1j
-2j
2j
-5j
5j
C element embeded C element un-embeded
1.0 1.1 1.2 1.3 1.4 1.5-30
-25
-20
-15
-10
-5
0
S P
aram
eter
/ (d
B)
Frequency / (GHz)
C embeded / |S11| C embeded / |S21| C un-embeded / |S11| C un-embeded / |S21|
0 1 1 2 5
-0j
0j
-1j
1j
-1j
1j
-2j
2j
-5j
5j
L exist Isolated
4.50 4.75 5.00 5.25 5.50 5.75 6.00-40
-30
-20
-10
0
S P
aram
eter
/ (d
B)
Frequency / (GHz)
L exist / |S11| L exist / |S21| Isolated / |S11| Isolated / |S21|
Fig.10Fig.10 coupling from C coupling from C element to L elementelement to L element
Fig.11Fig.11 coupling from L coupling from L element to C elementelement to C element
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Fabrication & Measurement--Fabrication & Measurement
Top ViewTop View Bottom ViewBottom View
Side ViewSide View
Fig.12Fig.12 Fabricated Half-Perforated Unit Cell Fabricated Half-Perforated Unit Cell
Fig.13Fig.13 Antenna Under Measurement Antenna Under Measurement
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Measurement Results (I)--Measurement Results (I)
1.10 1.15 1.20 1.25 1.30 1.35 1.401
2
3
4
5
6
VS
WR
Frequency / (GHz)
H port V port Simulated
VSWR≤2 bandwidth
1.0 1.1 1.2 1.3 1.4 1.5-25
-20
-15
-10
|S21
| / (d
B)
Frequency / (GHz)
Measured Simulated
VSWRVSWR IsolationIsolation
Fig.14 L band Measured Port ParametersFig.14 L band Measured Port ParametersVSWRVSWR
Fig.14 L band Measured Port ParametersFig.14 L band Measured Port ParametersIsolationIsolationVSWRVSWR
Fig.14Fig.14 L band Measured Port Parameters L band Measured Port Parameters
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Measurement Results (II)--Measurement Results (II)
-90 -60 -30 0 30 60 90-40
-35
-30
-25
-20
-15
-10
-5
0
Nor
mal
ized
Pat
tern
/ (d
B)
Angle / (°)
E cut X-pol / Simu. H cut Co-pol / Simu. E cut Co-pol / Simu. H cut X-pol / Simu. H cut Co-pol / H port H cut X-pol / H port
E cut Co-pol / H port E cut X-pol / H port H cut Co-pol / V port H cut X-pol / V port E cut Co-pol / V port E cut X-pol / V port
Fig.15Fig.15 L band Measured Radiation Pattern L band Measured Radiation Pattern
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Measurement Results (III)--Measurement Results (III)
4.6 4.8 5.0 5.2 5.4 5.6 5.81
2
3
4
5
6
VS
WR
Frequency / (GHz)
C1 C2 C3 C4 C5 C6 C7 C8 Simu.
4.0 4.4 4.8 5.2 5.6 6.0-30
-25
-20
-15
-10
|S21
| / (d
B)
Frequency / (GHz)
A1 B1 B2 A2 Simu.
IsolationIsolationVSWRVSWR
Fig.16 C band Measured Port ParametersFig.16 C band Measured Port ParametersVSWRVSWR
Fig.16 C band Measured Port ParametersFig.16 C band Measured Port ParametersIsolationIsolationVSWRVSWR
Fig.16Fig.16 C band Measured Port Parameters C band Measured Port Parameters
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L/C-DBDP Half Perforated Unit CellL/C-DBDP Half Perforated Unit Cell--Measurement Results (IV)--Measurement Results (IV)
-90 -60 -30 0 30 60 90-60
-50
-40
-30
-20
-10
0N
orm
aliz
ed P
atte
rn /
(dB
)
Angle / (°)
E cut X-pol / Simu. H cut X-pol / Simu. H cut Co-pol / Simu. E cut Co-pol / Simu. E cut Co-pol / H port E cut X-pol / H port
H cut Co-pol / H port H cut X-pol / H port E cut Co-pol / Vport E cut X-pol / V port H cut Co-pol / V port H cut X-pol / V port
Fig.17Fig.17 C band Measured Radiation Pattern C band Measured Radiation Pattern
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L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell--Configuration (I)--Configuration (I)
Fig.18Fig.18 Configuration of “overlapped” unit cell Configuration of “overlapped” unit cell
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L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell--Configuration (II)--Configuration (II)
Solution A Solution B
Solution C Solution D
Solution E
Fig.19Fig.19 Vertical transfer method Vertical transfer method
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L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell--Fabrication & Measurement--Fabrication & Measurement
Fig.20Fig.20 Fabricated Overlapped Unit Cell Fabricated Overlapped Unit Cell
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L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell--Measurement Results (I)--Measurement Results (I)
1.0 1.1 1.2 1.3 1.4 1.5-30
-25
-20
-15
-10
-5
0
S P
aram
eter
/ (d
B)
Frequency / (GHz)
Measured |S11| Simulated |S11| Simulated |S21| Measured |S21|
-90 -60 -30 0 30 60 90-40
-30
-20
-10
0
Nor
mal
ized
Pat
tern
/ (d
B)
Angle / (°)
E cut Co-pol / Meas. E cut X-pol / Meas. H cut Co-pol / Meas. H cut X-pol / Meas. H cut Co-pol / Simu. E cut Co-pol / Simu.
Radiation PatternRadiation PatternS ParametersS Parameters
Fig.21Fig.21 L band Measured Results L band Measured ResultsRadiation PatternRadiation PatternS ParametersS Parameters
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L/C-DBDP Overlapped Unit CellL/C-DBDP Overlapped Unit Cell--Measurement Results (II)--Measurement Results (II)
4.50 4.75 5.00 5.25 5.50 5.75 6.00-30
-25
-20
-15
-10
-5
0
S P
aram
eter
/ (d
B)
Frequency / (GHz)
Measured |S11| Simulated |S11| Measured |S21| Simulated |S21|
-90 -60 -30 0 30 60 90-50
-40
-30
-20
-10
0
Nor
mal
ized
Pat
tern
/ (d
B)
Angle / (°)
H cut Co-pol / Meas. H cut X-pol / Meas. E cut Co-pol / Meas. E cut X-pol / Meas. H cut Co-pol / Simu. E cut Co-pol / Simu.
Fig.22Fig.22 C band Measured Results C band Measured ResultsRadiation PatternRadiation PatternS ParametersS Parameters
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L/C-DBDP Unit CellL/C-DBDP Unit Cell--Measured Data Conclusion--Measured Data Conclusion
Table I.Table I. Measured results of L/C DBDP unit cell Measured results of L/C DBDP unit cell
specificationspecificationOverlapped StructureOverlapped Structure Half Perforated StructureHalf Perforated Structure
LL band band (1.25GHz)(1.25GHz) C C band band (5.3GHz)(5.3GHz) LL band band (1.25GHz)(1.25GHz) C C band band (5.3GHz)(5.3GHz)
Bandwidth Bandwidth (MHz)(MHz) 219219 790790 166166 802802
BandwidthBandwidth (%) (%) 17.617.6 1515 1313 15.815.8
polarizationpolarization Dual-linear polarDual-linear polar Dual-linear polarDual-linear polar Dual-linear polarDual-linear polar Dual-linear polarDual-linear polar
Isolation Isolation (dB)(dB) 1515 1717 1919 2121
X polarization X polarization (dB)(dB) -23-23 -25-25 -23-23 -30-30
Gain (dB)Gain (dB) 9.99.9 13.413.4 9.79.7 10.310.3
11stst SLL (dB) SLL (dB) ---- -15(E) / -21(H)-15(E) / -21(H) ---- -5(E) / -13(H)-5(E) / -13(H)
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Sidelobe Level Calibration --Sidelobe Level Calibration
-90 -60 -30 0 30 60 90-30
-25
-20
-15
-10
-5
0
Nor
mal
ized
Pat
tern
/ (d
B)
Angle / (°)
E cut H cut
Perspective ViewPerspective View
Side ViewSide View Simulated Radiation PatternSimulated Radiation Pattern
Fig.23Fig.23 Raised Ground & SLL Calibration Raised Ground & SLL Calibration
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Configuration--Configuration
Perspective ViewPerspective View Top ViewTop View
Fig.24Fig.24 Configuration of Half Perforated Full Array Configuration of Half Perforated Full Array
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Simulated Results--Simulated Results
1.10 1.15 1.20 1.25 1.30 1.35 1.40-35
-30
-25
-20
-15
-10
-5
0
S P
aram
eter
/ (d
B)
Frequency / (GHz)
|S11| |S21|
4.5 4.8 5.1 5.4 5.7 6.0 6.3-30
-25
-20
-15
-10
-5
0
|S11
| / (d
B)
Frequency / (GHz)
Embeded Isolated
L bandL band C bandC band
Fig.25Fig.25 Simulated S-Parameters of full array Simulated S-Parameters of full array
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Layout (I)--Layout (I)
SMA via hole
Metal Perturbation with via hole
L band cavity
SMA connector
Aluminum PlateAluminum Plate
Upper SurfaceUpper Surface
Aluminum PlateAluminum Plate
downsidedownside
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Layout (II)--Layout (II)
L driven patch &L driven patch &
C driven patchC driven patch
C Parasitic PatchC Parasitic Patch
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L/C-DBDP Half Perforated Full ArrayL/C-DBDP Half Perforated Full Array--Layout (III)--Layout (III)
L Perforated Parasitic PatchL Perforated Parasitic Patch
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ConclusionConclusion
Theoretically explain relationship between bandwidth Theoretically explain relationship between bandwidth and perforationand perforation
Design and fabricate a L/C “half perforated” unit cellDesign and fabricate a L/C “half perforated” unit cell
Design and fabricate a L/C “overlapped” unit cellDesign and fabricate a L/C “overlapped” unit cell
An L/C “half perforated” full array is designed and An L/C “half perforated” full array is designed and under fabricationunder fabrication
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Q & AQ & A
Thanks !Thanks !