-UnixWebMath-

Yagi-Uda Antenna

The directivity gain and the input impedance of a Yagi-Uda antenna is computed.
The antenna sits in the x-z plane.
Specify the frequency (in MHZ) at which the antenna will operate, the length of the three wires, the distances between them (in meters) and the radius of the wire "wirad" (in millimeters).

Input Block: frequency=300.; lgrefl=0.6; lgmain=0.5; lgdir=0.4; disrm=0.2; dismd=0.2; wirad=0.5; << notebooks/yagi/fort.m; << notebooks/plotno.m; {zin,dir,yagiuda}= AnalyzeYagiUda[frequency,lgrefl,lgmain, lgdir,disrm,dismd,wirad]; Print["Input Impedance (Re, Im): ",zin]; Print["Directivity: ",dir]; PatPlot2DAll[yagiuda]; PatPlot3D[yagiuda, PlotPoints -> 40];
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This script was developed at the Center for Computational Electromagnetics (CCEM) in the University of Illinois at Urbana with funding from the Sloan Center for Asynchronous Learning Environments(SCALE).
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Yagi-Uda Antenna

Adjacent images can be compiled into a movie and 3D graphics can be converted to a VRML format: Note: VRML images require a VRML viewer and Movies require a MPEG viewer.

Enter values in this section only if you are submitting a job for later retrieval:

Adjacent images can be compiled into a movie and 3D graphics can be converted to a VRML format:
Note: VRML images require a VRML viewer and Movies require a MPEG viewer.