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For this project, you will also define two field sensors at XY and YZ planes to observe the electric and magnetic field distributions. To define the field sensors, right-click on the <b>Near Field Sensors</b> item in the “Observables” section of the navigation tree and select <b>Insert New Observable…</b> In the Field Sensor Dialog, enter the point (0, 0, 0) for <b>Coordinates</b> and select <b>Z</b> and <b>X</b> from the''' Direction''' drop-down list for the XY plane. Then define Sensor_2 which is X-directed and YZ planescentered at (0, respectively0,0) for the YZ plane. Two orthogonal, purple boxes appear around your structure inside the computational domain.
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