Antenna Laboratory

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Simulation the Dipole Antenna under HFSS

Antenna Laboratory

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Procedure Summary

Design a Dipole antenna under HFSS using two cylinders with the flowing geometrical

parameters:

Height: dipole_length

Dipole_length = (0,475*lambda/2) –(gape/2)

Lambda = 10 mm

gap = 0.125 mm

Radius = dipole_radiation

dipole_radiation = lambda/200

In the command tab of the cylinder entre the following:

The dipole structure is illustrated below:

The two wire define as perfect E

Antenna Laboratory

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Create a Lumped Gap Source: This will provide an excitation to the dipole structure, Begin by selecting the YZ plane from

the toolbar. Using the 3D toolbar, click Drow Rectangle and place it between the two wires

(cylinder). In the command tab of the rectangle entre the following:

The Source is depicted below (Excitation->Assign->Lumped Port):

Antenna Laboratory

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Radiation Boundary: To obtain the best result, a cylinder air boundary is defined with a lambda/4.

The command tab and the enter the following

Where

Radiation_height = gap/2 + ((0.475*lambda)/2-gap/2)+dipole_length+lambda/10.

Select all the face of the cylinder Radiation Boundary, right click the boundary icon

(boundary-> assign ->Radiation)

Question

Define the solution frequency about 30 GHz and the Maximum Number of Passes as 20.

Fmin = 25 GHZ and the Fmax = 35 GHz.

1. Determine the resonance frequency and bandwidth of this antenna from the S

Parameter (S<dB> (Lumped, Lumped)),

2. At the resonance frequency, what the value of the antenna impedance Z.

3. In order to test the directivity of dipole antenna make the radiation patterns for

far field report type (Gain(phi) <dB> )

Antenna Laboratory

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Guide

To define the Report for

Radiation pattern

To define the Far field

Setup