Antennas. About CST. Complete Technology for Antenna Simulation. Edoardo Genovese, CST AG.

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1 1 Antennas Complete Technology for Antenna Simulation Edoardo Genovese, CST AG CST workshop series 2010 February 10 1 About CST founded in employees world-wide distribution network focus on 3D EM simulation CST workshop series 2010 February 10 2

2 CST s Product portfolio CST MICROWAVE STUDIO CST DESIGN STUDIO CST EM STUDIO CST PARTICLE STUDIO CST PCB STUDIO CST CABLE STUDO CST MICROSTRIPES CST MPHYSICS STUDIO CST workshop series 2010 February 10 3 Our Markets CST workshop series 2010 February

3 3 A small selection... CST workshop series 2010 February 10 5 Antenna Simulation Different antenna types require different solver technologies. CST workshop series 2010 February 10 6

4 Transient Solver PBA meshing Broadband Linear memory GPU acceleration CST workshop series 2010 February 10 7 Frequency Solver Single frequency Electrically small Tetrahedral mesh Multiple ports 8 balun fed dipoles CST workshop series 2010 February

5 Integral Equation Solver Surface mesh (Iterative) MOM MLFMM method CST workshop series 2010 February 10 9 Antenna Types Summary Category Examples Typical Applications Solvers Reflector Aperture Wire (Slot) Patch Parabolic dish Corner reflector Rectangular horn Circular horn Ridged horn Waveguide array Dipole LPDA, Yagi-Uda Helix Printed antennas Discone Rectangular patch Circular patch Patch arrays CST workshop series 2010 February Communication Radar Radio astronomy Radar Reflector feed Calibration standards Measurement Communication GPS EMC measurement RFID Almost anything else Radar Communication GPS Imaging 5

6 6 Aperture Antennas - Concepts Physical Principle: Simulation Aspects: Electrically moderate to large size Broadband Symmetry planes Curved geometry (PBA) HPC Recommended Solver: Transformation of guided wave to propagating wave by aperture field... CST workshop series 2010 February Horn antenna example Corrugated horn 7-13 GHz 10 GHZ 69 sec 12 min CST workshop series 2010 February 10 12

7 7 Reflector Antennas - Concepts Physical Principle: Simulation Aspects: Electrically large d G 2 2 d 2 Farfield source Phase centre analysis Symmetry planes important HPC Recommended Solvers: Focussing of energy CST workshop series 2010 February Reflector example 1. Field Decomposition 69 sec 30 sec 2. Direct Simulation Diameter: 17λ 13 min CST workshop series 2010 February 10 14

8 8 Wire Antennas - Concepts Physical Principle: Simulation Aspects: All sizes all solvers Tetrahedral mesh for wires Bending Subgridding Small details can be tricky HPC Recommended Solvers: L = λ/2 CST workshop series 2010 February Wire Discone, MHz 2h 21min 5 min CST workshop series 2010 February 10 16

9 9 Conical Log Spiral, T-Solver Simulation times: 21 min CST workshop series 2010 February Conical Log Spiral, F-Solver Simulation times: 21 min 24 min CST workshop series 2010 February 10 18

10 10 Conical Log Spiral, I-Solver Simulation times: 21 min 24 min 44 sec CST workshop series 2010 February Patch Antennas - Concepts Physical Principle: Simulation Aspects: Planar or conformal Thin Sheet Technique F-solver for conformal Bending feature M-Solver for planar (soon) HPC Recommended Solvers: L = λ/2 CST workshop series 2010 February 10 20

11 11 Patch antenna example CST workshop series 2010 February Time versus Frequency Domain 72 sec 31 MB 548 sec 702 MB CST workshop series 2010 February 10 22

12 Why is the T-solver faster? Rectangular structure aligned with hexahedral mesh PBA perfect for planar structures High density of surface current at the patch edges No problem in TD only few mesh cells Large number of 2 nd order tetrahedrons in FD CST workshop series 2010 February Patch on Cylindrical Substrate 3 hours 30 min CST workshop series 2010 February

13 13 Patch Array on Conical Substrate 2,146,588 mesh cells (Subgridding reduction factor 7.87) Simulation time: 20 h 39 min 247,425 Tetrahedrons Simulation time: 2 h 50 min CST workshop series 2010 February Conclusion Different antenna types different geometries different physical mechanisms different simulation criteria! Multiple solvers allow optimal simulation of many different antenna types. CST workshop series 2010 February 10 26

14 14 Workshop alle 14: in SALA MANZONI Uso del software commerciale CST MICROWAVE STUDIO per il design di un sistema di antenna, e l integrità di segnale di un PCB reale. Edoardo Genovese, CST Per dimostrazioni pratiche o domande siete i benvenuti al nostro stand CST workshop series 2010 February 10 27

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