Comprehensive Electromagnec Soluons www.feko.infoFEKO is a product of EM Software & Systems - S.A. (Pty) Ltd Antenna Design and Placeme nt with FEKO and Antenna Magus A case study , showing the design of an ar ray antenna for the proximity fuse of an air defence missile, is performed to illustrate the combined use of Antenna Magus* and FEKO. The array synthesis tool in Antenna Magus is used to design a linear array with a 45° scan angle and a Dolph- Chebyshev excitation taper (the latter chosen to control the side lobes to below -20 dB). Due to conformal requirements, a microstrip patch antenna with FR4 as substrate is selected as the radiating element. Antenna Magus is used to estimate the performance of the array. These results are saved in a FEKO file format. The antenna model is exported from Antenna Magus to a CADFEKO file format for further analysis in FEKO. T wo simulation methods are used to test the antenna design in FEKO: • A model based on the MoM planar Green’s function (MoM-GF) to quickly verify the design. This method takes into account mutual coupling, but not nite ground plane effects. • A model based on the FEM-MLFMM, a full-wave solution method that includes both mutual coupling and finite ground plane effects, to accurately determine performance. POSTFEKO is used to compare the antenna’s predicted performance, estimated with antenna theory in Antenna Magus, to its performance accurately simulated with FEKO. The results show good comparison and confirm that the antenna adheres to design specifications. The final part of the case study investigates the functioning of the antenna in its intended operating environment. The antenna is integrated onto a mock-up of an air defence missile in CADFEKO. The problem can be dealt with effectively using the FEM-MLFMM hybrid formulation, treating the complex conformal dielectric antenna and the cavity it resides in with the FEM and the electrically large missile with the MLFMM. The analysis shows that the antenna’s performance is not degraded significantly by conforming it to the missile body and little spurious effects are introduced by the proximity of the missile. Estimation of array performance using thearray synthesis tool in Antenna MagusThe currents flowing on the missile bodyand the farfields radiated by the conformalarray, plotted in POSTFEKO*Antenna Magus is a product of MAGUS (Pty) Ltd. It can be obtained through FEKO distribution channels. The main lobe of the mounted antenna(blue) has the required 45° squint, comparing well to the planar antenna (red)CADFEKO model of a mock-up air defence missile withconformal microstrip antenna array
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Antenna Magus* is a software tool that assists engineers in the process of designing and modelling antennas. It has an extensive,searchable collection of antennas that can be used with ease to design an antenna for a given set of specifications. The models of
the designed antennas can be exported to FEKO for further analysis.
Antenna Magus is suitable
for a broad range of
applications due to the large,
ever increasing number of
antennas in its database. Its
feature set is aimed at helping
engineers in the early stages
of a design by providing a comprehensive overview of literature, general information, design guidelines and first approximation
results. Customised antenna designs and information can be added by the user, for later redesign or to share with colleagues.
Antenna Magus also provides antenna engineers with utilities such as an array synthesis tool, a chart tracing tool and substrate
and waveguide libraries.
Its seamless integration with FEKO quickly leads the design engineer to the customisation phase of an antenna design. After
visualising performance graphs and validating the initial design, a parametric model can be exported to FEKO for customisation
and in-depth analysis. These
features simplify the day-to-day
work of antenna designers and
creators of electromagneticmodels, ensuring that projects are
completed within specification and
on time.
The combination of Antenna
Magus with FEKO also provides
a powerful solution for antenna
placement analysis. Representative
models of customised or standard
third party antennas can easily be
exported from Antenna Magus into
FEKO where they can be placed
onto platforms for comprehensive
performance analysis in their
operating environments.
• Verify performance by simulating accurately
• Customize for optimised performance
• Consider operating environment
• Create final design
Build and
measure
prototype• Select suitable antenna configuration
• Create first order design
• Estimate performance
• Export parametric CADFEKO model
Define
system
specifications
Antenna Magus
Explore Estimate performance
Design Export
*Antenna Magus is a product of MAGUS (Pty) Ltd. It can be obtained through FEKO distribution channels.
Where does Antenna Magus fit into the design process?
FREE EVALUATION AND MORE INFORMATIONIf you are interested in learning more about Antenna Magus, please visit the