Changes

[[EM.Cube|EM.CUBE]] Libera allows you to visualize the near fields at a specific field sensor plane. Calculation of near fields is a post-processing process and may take a considerable amount of time depending on the resolution that you specify. To define a new Field Sensor, follow these steps:

* Right click on the '''Field Sensors''' item {{Note|Keep in the '''Observables''' section of the Navigation Tree and select '''Insert New Observablemind that since EM...'''* The '''Label''' box allows you to change the sensor’s name. you can also change the color of Libera uses MoM solvers, the calculated field sensor plane using value at the '''Color''' button.* Set the '''Direction''' of the field sensor. This source point is specified by the normal vector of the sensor planeinfinite. The available options are '''X'''As a result, '''Y''' and '''Z''', with the last being the default option.* By default [[EM.Cube|EM.CUBE]] creates a field sensor plane passing through the origin of coordinates sensors must be placed at adequate distances (0,0,0) and coinciding with the XY plane. You can change the location of the sensor plane to any point by typing in new values for the X, Y and Z '''Center Coordinates'''. You can also changes these coordinates using the spin buttons. Keep in mind that you can move a sensor plane only along the specified direction of the sensor. Therefore, only at least one coordinate can effectively be changed. As you increment or decrement this coordinate, you can observe few wavelengths) away from the sensor plane moving along that direction in the Project Workspace.* The initial size of the sensor plane is 100 × 100 project units. You can change the dimensions of the sensor plane scatterers to any desired size. You can also set the '''Number of Samples''' along the different directions. These determine the resolution of near field calculations. Keep in mind that large numbers of samples may result in long computation timesproduce acceptable results.}}

After closing the Field Sensor Dialog, the a new field sensor item immediately appears under the [[Image:Info_icon.png|40px]] Click here to learn more about '''Observables[[Data_Visualization_and_Processing#The_Field_Sensor_Observable | Defining a Field Sensor Observable]]''' section in the Navigation Tree and can be right clicked for additional editing. Once a Wire MoM simulation is finished, a total of 14 plots are added to every field sensor node in the Navigation Tree. These include the magnitude and phase of all three components of E and H fields and the total electric and magnetic field values. Click on any of these items and a color-coded intensity plot of it will be visualized on the Project Workspace. A legend box appears in the upper right corner of the field plot, which can be dragged around using the left mouse button. The values of the magnitude plots are normalized between 0 and 1. The legend box contains the minimum field value corresponding to 0 of the color map, maximum field value corresponding to 1 of the color map, and the unit of the field quantity, which is V/m for E-field and A/m for H-field. The values of phase plots are always shown in Radians between -π and π. You can change the view of the field plot with the available view operations such as rotating, panning, zooming, etc.

<table><tr><td> [[FileImage:wire_pic31_tnwire_pic32_tn.png]] Figure: A |thumb|360px|Electric field plot of the circular loop antenna fed by a gap source. [[File:wire_pic32_tn.png|400px]] </td><td> [[FileImage:wire_pic33_tn.png|400px]] Electric and magnetic thumb|360px|Magnetic field plots plot of the circular loop antenna.]] </td></tr></table>