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

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

David Zhang3 Wideband Integrated Antenna 4 th SKADS workshop, Lisbon 2-3 Oct, 2008 Schedule review JunJulyAugSepOctNovDec Phase 1 Phase 2 Phase 3 FebMarMayJanAprJunJulyAugSepOctNovDec 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

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)

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

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: Thickness: 1.27mm PTFE, Single-sided copper e r =3.4, Dissipation factor: Thickness: 50 μm

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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