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Inmarsat Phased Array Design using Antenna Magus
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Searchable database
Design antenna
Synthesise array
Estimate performance
Export parameterized
CST STUDIO SUITE® model
Antenna Magus
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Inmarsat-4: Design Specifications
Gain nominal gain of 12 dBic and max 17 dBic across majority, (85%) of the spherical coordinates
Satellite Discrimination 13 dB
Steer angle 360 degrees azimuth, 180 degrees elevation.
Size constraints fit under radome = 1000 x 400 x 50 mm3
Single Element Phased Array
1518 MHz 1675 MHz
RHCP
Frequency [MHz]
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Element Choice (i): Bandwidth
Stacked element has
more bandwidth
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Element Choice (ii) RHCP
How to circularly polarize
the chosen element?
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Element Choice — Summary
Combine the desirable
characteristics of these
two antennas
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Initial Design
z-axis scaled for
better visibility
To improve initial design
Info browser in Antenna Magus
Design guidelines in Antenna Magus
Optimization in CST STUDIO SUITE®
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Finalized Design — within Specification
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Add the New Design to Antenna Magus
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Array Synthesis
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Construct Finite Array
Export distribution matrix to
CST STUDIO SUITE®
Construct array from element
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Simulation Results
Finite array with no beam steering (main lobe
is broadside).
Simulation requires 1.5 GB RAM and 1.25 hours
on a standard issue laptop.
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Scan Performance theta = 45°, phi = 45° theta = 50°, phi = 70°
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Simulated Like Measured Standard ARINC 781 ground plane 2.4 x 1.6 m section of a 3m radius cylinder
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Installed Performance
Phased
array
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Large library of antennas
New designs are easy
Quick estimation functionality
Include your own antenna in the library
Exports are parameterized
Perfect companions to CST STUDIO SUITE®
Conclusion