Modeling a Centerdriven Dipole with IE3D
Geometry and setup 
Geometry: L= 1 m,
a = 0.5 mm
Deembedded scheme: Advanced extension
Wire model: Tube (number of sides = 6) Simulation Setup:
 Meshing Parameters: 4GHz. 100 Cells/Wavelength
 Scheme: Classical, No FASTA
 Matrix Solver: Adaptive Symemtric Solver
 Adaptive IntelliFit: Enabled
 Frequency Parameters: 5 MHz  400 MHz, step size = 5 MHz
Sweep:
ie3d_dipole.zip

Simulation result 
Simulation Time: 61 seconds
Number of cells: 912
Number of unknowns: 1812
Input impedance at 150 MHz: 83.2+j41.2 Ohms
First resonant frequency: 144 MHz

Decisions the user must make that affect the
accuracy of the result 
 Meshing frequency and meshing cell size: Higher mesh densities or cells per wavelength generally yields more accurate results. In this example, we set the meshing frequency to 400 MHz and cells/wavelength
to 100.
 Deembedding scheme: The Advanced Extension scheme is normally the best considering the applicable frequency
range and stability.
 Adaptive IntelliFit (AIF): A scheme allowing users to get the frequency response at many frequency
points with guaranteed accuracy by simulating just a few frequency points. This can reduce the simulation
time significantly. Enable AIF and use the default settings.

Comments 
 Other ways to model the dipole antenna
There are few different ways to model the dipole antenna depending upon the accuracy required
More information
...
 
Screen shots
Fig. 1. Simulation model
Fig. 2. Simulation meshes
</>
Fig. 3. Input impedance
Fig. 4. Input impedance at the first
resonant frequency  