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==Moving the Transmitter into a Dense Area== Next, we moved the transmitter with the rotated Yagi-Uda array into a denser area and placed it at x = 900m and y = 450mm. <table><tr><td>[[Image:ART MANH Fig15.png|thumb|left|550px|The received power coverage map of the Manhattan scene with a rotated horizontal Yagi-Uda array at f = 1.5GHz.]]</td></tr></table>Â Instead of running a single-frequency SBR analysis, this time we ran a frequency sweep of the propagation scene over the frequency range [1.5GHz, 2.5GHz]. A frequency step of 100MHz was chosen, hence, a total of 11 frequency samples. The geometrical optic (GO) part of the simulation is the same for all frequency samples except for the fact that the reflection coefficients are at the building specular points are frequency-dependent. Diffraction coefficients are frequency-dependent, too. [[EM.Terrano]] first determines all the optical paths in the scene using the k-d tree algorithms. Then, it calculates the reflection and diffraction coefficients at each frequency sample and computes the field components and received power at the location of each receiver. As a result, [[EM.Terrano]]'s frequency sweeps are extremely fast. The figures below show
Next, we move the transmitter into the denser area and place it at x = 900m, y = 450mm.
open the property dialog of the short dipole source and move its coordinated to (750m, 450m, 40m), keeping it at the same height as before. Run a new SBR simulation of the scene and visualize the received coverage map.
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[[Image:ART MANH Fig17.png|thumb|left|550px|The received power coverage map of the Manhattan scene with a rotated horizontal Yagi-Uda array at f = 12.5GHz0GHz.]]
</td>
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<td>
[[Image:ART MANH Fig18.png|thumb|left|550px|The received power coverage map of the Manhattan scene with a rotated horizontal Yagi-Uda array at f = 12.5GHz.]]
</td>
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