Wideband Integrated Antenna Dual Polarization

Post on 15-Jan-2016

64 views 0 download

description

Wideband Integrated Antenna Dual Polarization. Extended Trade-off Study by the University of Manchester. Outline. High-level schedule review Infinite elements array simulations and measurements Vivaldi Antenna Bunny Ear Combline Antenna (BECA) Octagon Rings Antenna (ORA) - PowerPoint PPT Presentation

Transcript of Wideband Integrated Antenna Dual Polarization

David Zhang 1Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Wideband Integrated Antenna Dual Wideband Integrated Antenna Dual Polarization Polarization

Extended Trade-off Study by the University of Manchester

David Zhang 2Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

OutlineOutline

• High-level schedule review

• Infinite elements array simulations and measurements– Vivaldi Antenna

– Bunny Ear Combline Antenna (BECA)

– Octagon Rings Antenna (ORA)

• Finite elements array study

• Summary and future work

David Zhang 3Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Schedule reviewSchedule review

Jun July Aug Sep Oct Nov Dec

Phase 1Phase 1

Phase 2Phase 2

Phase 3Phase 3

Feb Mar MayJan Apr Jun July Aug Sep Oct Nov Dec

2007 2008

Conventional Vivaldis

•Simulations

•Verifications

•Improved Vivaldis

•BECA

•ORA

•Mini array studying

Finite Array Studying

Triangular grid investigation

1st generation1st generation 2nd and 3rd generation2nd and 3rd generation 4th generation4th generation

David Zhang 4Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Integrated Aperture Array AntennasIntegrated Aperture Array Antennas

– Vivaldi Antennas

– Bunny Ear Combline Antennas (BECA)

– Octagon Rings Antennas (ORA)

David Zhang 5Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Conventional VivaldisConventional Vivaldis

David Zhang 6Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Improved VivaldisImproved Vivaldis

Arlon Diclad 880

er=2.2,

Dissipation factor: 0.0009

Thickness: 1.27mm

PTFE, Single-sided copper

er=3.4,

Dissipation factor: 0.007

Thickness: 50 μm

David Zhang 7Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Infinite array performance for Infinite array performance for improved Vivaldis 170mmimproved Vivaldis 170mm

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-40

-35

-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

Ret

urn

loss

(dB

)

Broadside

H45o E45o

David Zhang 8Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Bunny Ear Combline Antenna Bunny Ear Combline Antenna (BECA)(BECA)

David Zhang 9Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Single elementSingle element

Probe for pattern measurementBECA element

David Zhang 10Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Pattern for BECAPattern for BECA

0 5 10 15 20 25 30 35 40 45-12

-10

-8

-6

-4

-2

0

Angle (deg)

No

rma

lise

d m

ag

nitu

de

(d

B)

Single element, CSTSingle element, HFSSSingle element, MeasuredInfinite array, HFSS11x11 finite array, active

0 5 10 15 20 25 30 35 40 45-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

Angle (deg)

No

rma

lise

d m

ag

nitu

de

(d

B)

Single element, CSTSingle element, HFSSSingle element, MeasuredInfinite array, HFSS11x11 finite array, active

0 5 10 15 20 25 30 35 40 45-7

-6

-5

-4

-3

-2

-1

0

Angle (deg)

No

rma

lise

d m

ag

nitu

de

(d

B)

Single element, CSTSingle element, HFSSSingle element, MeasuredInfinite Array, HFSS11x11 finite array, active

E-plane H-plane D-plane

David Zhang 11Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

BECA linear array 8BECA linear array 8××11

David Zhang 12Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Insertion loss for the centre Insertion loss for the centre element of the linear arrayelement of the linear array

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

Ret

urn

loss

(dB

)

MeasuredHFSSCST

David Zhang 13Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Dual polarisation elementDual polarisation element

X-cfg L-cfg

David Zhang 14Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

X-cfg over L-cfg for BECAX-cfg over L-cfg for BECA

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-35

-30

-25

-20

-15

-10

-5

Frequency (GHz)

Ret

urn

loss

(dB

)

Broadside

Eplane 45o

Hplane 45o

Dplane 45o

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-40

-35

-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

Ret

urn

loss

(dB

)

Broadside

Eplane 45o

Hplane 45o

Dplane 45o

L-cfg X-cfg

David Zhang 15Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

CoPol over Xpol ratio in CoPol over Xpol ratio in DD-plane-plane

0 5 10 15 20 25 30 35 40 45-8

-7

-6

-5

-4

-3

-2

-1

0

Angle (deg)

No

rma

lise

d p

ola

riza

tion

ra

tio (

dB

)

0.85 GHz, Triplate Vivaldi0.9 GHz, Triplate Vivaldi0.95 GHz, Triplate Vivaldi1 GHz, Triplate Vivaldi0.85 GHz, BECA, X config0.9 GHz, BECA, X config0.95 GHz, BECA, X config1 GHz, BECA, X config

David Zhang 16Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Octagon Rings Antennas (ORA)Octagon Rings Antennas (ORA)

David Zhang 17Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Munk Dipole Array Munk Dipole Array – – Layered materials Layered materials

David Zhang 18Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Munk Dipole Array – Munk Dipole Array – Meta material layerMeta material layer

David Zhang 19Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Performance for MUNK Performance for MUNK Dipole Array, 150mm UnitDipole Array, 150mm Unit

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21

2

3

4

5

Frequency (GHz)

VS

WR

(a)

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21

2

3

4

5

Frequency (GHz)

VS

WR

(b)

BS45E45H

BS45E45H

a) 2 Layered materials

b) Reflection facets

David Zhang 20Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Performance for different Performance for different element shapes, 165mmelement shapes, 165mm

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21

2

3

4

5

Frequency (GHz)

VS

WR

(a)

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21

2

3

4

5

Frequency (GHz)

VS

WR

(b)

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21

2

3

4

5

Frequency (GHz)

VS

WR

(c)

BS

45E

45H

BS

45E

45H

BS

45E

45H

a) Squares

b) Circles

c) Octagons

David Zhang 21Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Octagon Rings Octagon Rings Array Array 150mm unit cell150mm unit cell

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.30

2

4

6

8

10

12

Frequency (GHz)

VS

WR

BS

45oE

45oH

4:1

David Zhang 22Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

ORA measurementsORA measurements

David Zhang 23Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

4 4 × 3 finite ORA × 3 finite ORA Centre elementCentre element

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2-45

-40

-35

-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

Ret

urn

loss

(dB

)

MeasuredSimulation

David Zhang 24Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

CoPol to Xpol ratio CoPol to Xpol ratio in in DD-plane-plane

0 5 10 15 20 25 30 35 40 4510

12

14

16

18

20

22

24

26

28

30

Angle (deg)

Pol

ariz

atio

n R

atio

(dB

)

Measurement, 750MHzMeasurement, 850MHzSimulation, 750MHzSimulation, 850MHz

David Zhang 25Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Finite element array studyingFinite element array studying

David Zhang 26Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

ORA finite arrayORA finite array

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1-45

-40

-35

-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

Ret

urn

loss

(dB

)

3 x 4 Measured3 x 4 SimulationInfinite Array4 x 4 Simulation

David Zhang 27Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

ORA 8 ORA 8 × 8 scan pattern BS× 8 scan pattern BS

David Zhang 28Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

ORA 8 ORA 8 × 8 scan pattern E45× 8 scan pattern E45oo

David Zhang 29Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

BECA 11 BECA 11 × 11 finite array× 11 finite array

David Zhang 30Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Size of finite arraySize of finite array

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2-60

-50

-40

-30

-20

-10

0

10

Frequency (GHz)

Inse

rtio

n lo

ss (

dB

)Infinite array11x11 finite array

David Zhang 31Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

8x8 centre section in 11x11 8x8 centre section in 11x11 finite array beam scanfinite array beam scan

David Zhang 32Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

SummarySummaryParameters Vivaldi BECA ORA

Bandwidth(450 scan, VSWR<2)

0.3~0.97GHz 0.3~0.98GHz 0.3~1 GHz

Polarisation change (0o to 45o scan)

Dramatic change Moderate Small

Immersed element pattern

Close to a cosine function

Close to a cosine function

Better than a cosine function

Element separation to meet bandwidth

170mm 170mm 165mm

The factors to influence costs:• Element separation

• The feeding scheme

• Loss of gain with scan

David Zhang 33Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Future workFuture work

• 16 × 16 finite elements arrays

• Triangular grid element investigation

David Zhang 34Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

PublicationsPublications

• Journals

“Bunny Ear Combline Antenna for dual-polarized aperture array,” to be submitted to IEEE Trans. On Antennas and Propagation.

• Patents

“Compact, low cost, wideband array antennas,” pending.

David Zhang 35Wideband Integrated Antenna4th SKADS workshop, Lisbon 2-3 Oct, 2008

Thank you!Thank you!