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[CST Studio Suite] Dipole Antenna Simulation

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Jun 25, 2020
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Sir/Madam,

I am working on a dipole antenna simulation using CST Studio Suite.
And I would like to ask for some technical supports.

Dipole.jpg

The screenshot above is my planar dipole antenna model.
It consists of 2 planar copper rods and a FR4 substrate.
I used a discrete port between the two planar copper rods to excite the antenna.
My intention is to excite the antenna with differential signal.
With this setup, I can plot the S11 ,both the magnitude and phase of this port:

Magnitude and Phase of discrete port.jpg

Question 1 : Why is the phase not 0 at the resonant frequency?
(I used a VNA to measured this design and plotted phase(Differential_S11). The phase is 0 at resonant)

Measurement Result :

DipoleMeasurement.jpg

Question 2 : If I want to look at the amplitude and relative phase of terminal 1 and terminal 2 separately (as shown below), how should I setup the simulation?

Figure3.jpg

Question 3 : Is there a way to plot amplitude and phase of terminal 1 and 2 in the time domain?

Below is the expected results that I would like to plot in CST :

Expected plots.jpg

Much appreciated!
 

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