1. David Zhang1 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Wideband Integrated Antenna Dual Polarization Extended Trade-off Study by the University of Manchester

2. David Zhang2 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Outline 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

3. David Zhang3 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Schedule review JunJulyAugSepOctNovDec Phase 1 Phase 2 Phase 3 FebMarMayJanAprJunJulyAugSepOctNovDec 20072008 Conventional Vivaldis Simulations Verifications Improved Vivaldis BECA ORA Mini array studying Finite Array Studying Triangular grid investigation 1 st generation2 nd and 3 rd generation4 th generation

4. David Zhang4 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Integrated Aperture Array Antennas – Vivaldi Antennas – Bunny Ear Combline Antennas (BECA) – Octagon Rings Antennas (ORA)

5. David Zhang5 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Conventional Vivaldis

6. David Zhang6 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Improved Vivaldis Arlon Diclad 880 e r =2.2, Dissipation factor: 0.0009 Thickness: 1.27mm PTFE, Single-sided copper e r =3.4, Dissipation factor: 0.007 Thickness: 50 μm

7. David Zhang7 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Infinite array performance for improved Vivaldis 170mm

8. David Zhang8 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Bunny Ear Combline Antenna (BECA)

9. David Zhang9 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Single element Probe for pattern measurementBECA element

10. David Zhang10 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Pattern for BECA E-planeH-plane D-plane

11. David Zhang11 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 BECA linear array 8×1

12. David Zhang12 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Insertion loss for the centre element of the linear array

13. David Zhang13 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Dual polarisation element X-cfgL-cfg

14. David Zhang14 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 X-cfg over L-cfg for BECA L-cfgX-cfg

15. David Zhang15 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 CoPol over Xpol ratio in D-plane

16. David Zhang16 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Octagon Rings Antennas (ORA)

17. David Zhang17 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Munk Dipole Array – Layered materials

18. David Zhang18 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Munk Dipole Array – Meta material layer

19. David Zhang19 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Performance for MUNK Dipole Array, 150mm Unit a) 2 Layered materials b) Reflection facets

20. David Zhang20 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Performance for different element shapes, 165mm a)Squares b)Circles c)Octagons

21. David Zhang21 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Octagon Rings Array 150mm unit cell

22. David Zhang22 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 ORA measurements

23. David Zhang23 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 4 × 3 finite ORA Centre element

24. David Zhang24 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 CoPol to Xpol ratio in D-plane

25. David Zhang25 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Finite element array studying

26. David Zhang26 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 ORA finite array

27. David Zhang27 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 ORA 8 × 8 scan pattern BS

28. David Zhang28 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 ORA 8 × 8 scan pattern E45 o

29. David Zhang29 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 BECA 11 × 11 finite array

30. David Zhang30 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Size of finite array

31. David Zhang31 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 8x8 centre section in 11x11 finite array beam scan

32. David Zhang32 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Summary ParametersVivaldiBECAORA Bandwidth(45 0 scan, VSWR<2) 0.3~0.97GHz0.3~0.98GHz0.3~1 GHz Polarisation change (0 o to 45 o scan) Dramatic changeModerateSmall Immersed element pattern Close to a cosine function Better than a cosine function Element separation to meet bandwidth 170mm 165mm The factors to influence costs: Element separation The feeding scheme Loss of gain with scan

33. David Zhang33 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Future work 16 × 16 finite elements arrays Triangular grid element investigation

34. David Zhang34 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Publications 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.

35. David Zhang35 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Thank you!