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STK 3D Electronically Steerable Phased Array Antenna Plugin

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STK 3D Electronically Steerable Phased Array Antenna Plugin. Trey Spetch, Jerry Odhner, and Kristen Jones. What is a 3D Steerable Phased Array Antenna?. Flat Panel Array of Elements Beam Electronically Steered by Varying Phase Across Elements Steerable in Both Azimuth and Elevation.

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STK 3D Electronically Steerable Phased Array Antenna Plugin

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  1. STK 3D Electronically Steerable Phased Array Antenna Plugin Trey Spetch, Jerry Odhner, and Kristen Jones

  2. What is a 3D Steerable Phased Array Antenna? • Flat Panel Array of Elements • Beam Electronically Steered by Varying Phase Across Elements • Steerable in Both Azimuth and Elevation

  3. Applications of Electronically Steerable Flat Panel Arrays • Over the Horizon Radar • Missile Searching and Tracking (Patriot Missile) • Ship-Borne Radar • Aircraft Antennas • Must be conformal with aircraft • No dishes allowed • Large apertures achievable

  4. STK Static Antenna Patterns Not Suitable to Model Phased Array Beam 90 Degree Elevation Beams 45 Degree Elevation Beams 1 GHz, 1m Aperture 1 GHz, 1m Aperture Array Antenna Dish Antenna Array Antenna Dish Antenna

  5. Antenna Notional Model m = 4 Crossed-Dipole Element n = 3 l/2

  6. Dihedral Angles to Boresight and ToObject • Dihedral Angles for Boresight (f, q) and ToObject (a, b)

  7. Plugin Model Coord Xform ToObjectAz b ToObjectEl a G(m, n, l, q, f, a, b) m, n, l GainToObject BoresightHoriz q BoresightVert f

  8. Beam Steered to Invisible Vehicle

  9. Creating and Attaching Plugin Scripts There are several kinds of plugins (constraints, transmitter and receiver models, custom antenna gain, etc) For a custom antenna gain plugin, select the plugin file on the receiver properties panel under Antenna… Details… Languages: Matlab, Perl, and VBScript. The examples scripts that AGI provides are a good place to start. You can then add any additional input variables as needed and write functions to do custom calculations.

  10. Plugin Code • AntennaGainPlugin.vbs.doc

  11. Directivity Visualization Using STK Coverage

  12. Effect of Changing Array Dimensions Increasing the number of elements along one axis of the antenna decreases the beamwidth in that direction 5 x 5 Array, 1 GHz 5 x 10 Array, 1 GHz 10 x 10 Array, 1 GHz

  13. Effects of Wavelength For a given panel aperture size, the beamwidth decreases with wavelength 1 meter array (2x2), 500 MHz 1 meter array (7x7), 1 GHz 1 meter array (33x33), 5 GHz

  14. Conclusion • STK Plugins allow dynamic beam shaping for antennas based on custom equations • Any geometric variable or scalar value can be input to the plugin • Allows extremely accurate modeling of link margins for phased arrays and other custom antennas

  15. Questions?

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