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