Changes

[[Image:MOMTUT3 47.png|thumb|450px|The Gap Source's property dialog.]]</td></tr></table> Define a default current distribution observable. Also, define a far-field radiation pattern observable. Right-click on the '''Far Fields''' item in the navigation tree and select '''Insert New Radiation Pattern...''' from the contextual menu. The Radiation Pattern Dialog opens up. Accept all the default settings including the default 5&deg; values of "Angle Increment" for both Theta and Phi. <table><tr><td>[[Image:MOMTUT3 8.png|thumb|450px|The far-field Radiation Pattern dialog.]]</td></tr></table> Finally. define a port for your dipole antenna to compute its port characteristics like the scattering (S) and impedance (Z) parameters. Right-click on the '''Port Definitions''' item in the navigation tree and select '''Insert New Port Definition...''' from the contextual menu. The Port Definition Dialog opens up. Since there is only one source present in you project workspace, it is associated with Port 1. Accept the default 50&Omega; port impedance and close the dialog. <table><tr><td>[[Image:MOMTUT3 9.png|thumb|500px|The Port Definition dialog.]]</td></tr></table> Your physical structure at this point must look like the figure below: <table><tr><td>[[Image:MOMTUT3 10.png|thumb|500px|The geometry of wire dipole antenna.]]