phased array design using antenna magus

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Inmarsat Phased Array Design using Antenna Magus

CST – COMPUTER SIMULATION TECHNOLOGY | www.cst.com

Searchable database

Design antenna

Synthesise array

Estimate performance

Export parameterized

CST STUDIO SUITE® model

Antenna Magus


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]


Element Choice (i): Bandwidth

Stacked element has

more bandwidth


Element Choice (ii) RHCP

How to circularly polarize

the chosen element?


Element Choice — Summary

Combine the desirable

characteristics of these

two antennas


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®


Finalized Design — within Specification


Add the New Design to Antenna Magus


Array Synthesis


Construct Finite Array

Export distribution matrix to

CST STUDIO SUITE®

Construct array from element


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.


Scan Performance theta = 45°, phi = 45° theta = 50°, phi = 70°


Simulated Like Measured Standard ARINC 781 ground plane 2.4 x 1.6 m section of a 3m radius cylinder


Installed Performance

Phased

array


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

phased array design using antenna magus

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