Laboratory work # 2 Theme: Design and analyze wireless antennas using the Antenna Designer application Purpose

Open Antenna Designer App

To open the app, at the MATLAB command prompt, enter:

antennaDesigner

This command opens a blank canvas.

Design Helix Antenna

In the blank canvas, click NEW. In the ANTENNA GALLERY, under HELIX FAMILY, select a helix antenna. Set the Design Frequency to 1.8 GHz.

To analyze the helix antenna, click Accept.

Change Helix Antenna Properties

In the Antenna Properties tab, change the following:

• 
  Radius = 0.0280
  
• 
  Width = 0.0012
  
• 
  Turns = 4
  
• 
  Spacing = 0.0350
  
• 
  GroundPlaneRadius = 0.0750
  

Click Apply to see the change in the helix antenna structure.

Plot Impedance and S-Parameters

Open the Load-helix section and change the Impedance of the antenna to 72 ohms. Click Apply. In the toolstrip, under VECTOR FREQUENCY ANALYSIS tab, change the Frequency Range to 1.7e9:1e6:2.2e9 Hz.

Click Impedance to plot the impedance of the helix antenna. Click S Parameter to plot the S11 value of the helix antenna. Click Tile to view the plots together.