EL 332 Electromagnetic Waves
Lab #1: Antenna Software Orientation
Objectives:
A. Know how to start LVDAM-ANT
B. Manipulate saved or current data in LVDAM
C. Know how to display radiation patterns in different formats
D. Understand and determine HPBW
E. Understand and determine MSL & MSP
F. Print radiation patterns in various formats
The Antenna Training System is a product of LabVolt (now Festo DiDactic).
Web Page: Labvolt-Festo
Parlay Assignment
Definitions:
Polar Plot
A two-dimensional plot where the domain is in degrees and the range at any azimuth is
related to a radial distance relative to 0 dB. For LVDAM-ANT the polar plot is in dB
with the outer ring set to be 0 dB. Negative dB implies a smaller value and such values
are plotted inside the 0 dB circle.
<latexit sha1_base64="hH07NJc7V4oAgTNSs3NTb/+hLWg=">AAAC2XicjVHLbtNAFL0xrxIeTQus2FhUlVigyK54dFmpG5ZFIm2lxETj62t3lPHYmrmGhlEW7Cq2fAFb4If4GyZOheqUBVca6eicO/d10lpJy1H0uxfcuHnr9p2Nu/179x883BxsbR/bqjFII6xUZU5TYUlJTSOWrOi0NiTKVNFJOjtc6icfyVhZ6fc8rykpRaFlLlGwp6aDJ5O2hpuTUtWnRfRhgtLgdLATDaM2wusgvgQ7B4+hjaPpVu/XJKuwKUkzKmHtOI5qTpwwLFHRoj9pLNUCZ6KgsYdalGQT1/ZehLueycK8Mv5pDlv26g8nSmvnZeozS8Fndl1bkv/Sxg3n+4mTum6YNK4a5Y0KuQqXxwgzaQhZzT0QaKSfNcQzYQSyP1l/92qpwhDNEpeKlFR3nbYtmsRRg6KrufPVhh3OiKKgbK97FGeZpC6JP/9PcurtzpjOeY2WhdRs10bI/T4v/kpteH/jdTevg+O9Yfx6+OqdN/rlymjYgKfwDJ5DDG/gAN7CEYwAwcF3+AE/g3HwJbgIvq5Sg97ln0fQieDbH5Gi6es=</latexit>
0
<latexit sha1_base64="1s90tHfd+9zE/8xeOvpTugyn+70=">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</latexit>
<latexit sha1_base64="H8DygQMc/kNHaOEQA60XoaNxN9U=">AAAC2nicjVFNT9tAEN2YtkD6QaCol16sIqQeqsimpeWI1AtHkBpAit1oPR6bVdZra3fcEpZcuFW98gt6LX+If9ONgyoceuhIKz29NztfL6mkMBQEtx1v6dHjJ8srq92nz56/WOutbxybstaAAyhlqU8TblAKhQMSJPG00siLROJJMv4800++oTaiVF9oUmFc8FyJTAAnR416r6Kmhp2glOX36fvgawRCw6i3FfSDJvyHILwDW/ubrInD0XrnJkpLqAtUBJIbMwyDimLLNQmQOO1GtcGKw5jnOHRQ8QJNbJvmU3/bMamfldo9RX7D3v9heWHMpEhcZsHpzCxqM/Jf2rCmbC+2QlU1oYJ5o6yWPpX+7Bp+KjQCyYkDHLRws/pwxjUHcjfrbt8vlWvEcWwTnqBsr9O0BR1brIG3NXs+37DFaZ7nmO60j2INoVAF0sX/JCfO75TwnBZokQtFZmGEzO3z7q/UhPM3XHTzITje6Ycf+7tHzugPc6PZCnvN3rC3LGSf2D47YIdswIBdsl/sN7vxIu/K++H9nKd6nbs/L1krvOs/OBjqKA==</latexit>
330
0 dB
30
-5
-10
<latexit sha1_base64="9NdNQQm6W+EEqkcRcv6ec9LzBNU=">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</latexit>
60
<latexit sha1_base64="8+txMd/+52aBtkfl4c8i6HWsJbs=">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</latexit>
300
-15
-20
-25
<latexit sha1_base64="upcmeh8ObBcF9c6nU5J6NSEwIcw=">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</latexit>
<latexit sha1_base64="tAJ8UVi3lp4OLoKFPedTl+3iU9I=">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</latexit>
270
90
<latexit sha1_base64="ZOB4G3skuMti6grV/8BKtFACFOE=">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</latexit>
<latexit sha1_base64="KDX9F46KUxJfZiiqTrTQKlF1KZQ=">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</latexit>
240
120
<latexit sha1_base64="XoleRwKCS48jeMYmPZLBl7FfwAs=">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</latexit>
<latexit sha1_base64="LoLakl/7tP+H3++xGfG21zDjvWE=">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</latexit>
150
210
<latexit sha1_base64="YEtEL2MmmNiG3YtR7FKUr8bocdQ=">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</latexit>
180
Figure L1.1: Polar Plot
J.Coffey, Revised 01/23
Page 1 of 5
EL 332 Electromagnetic Waves
Lab #1: Antenna Software Orientation
Linear Plot
A rectangular two-dimensional plot where the domain is in degrees, plotted horizontally
with zero degrees (0∘)in the middle, negative degrees to the left of zero and positive
c
degrees to the rightλ = of zero. The value at any azimuth is plotted vertically. For
f
LVDAM-ANT the linear plot is in dB with the top of the plot set to be 0 dB. Negative
dB implies a smaller value and are plotted below the top, which is 0 dB.
MSL, Maximum Signal Level
This is the maximum signal (measured in dB) received in the data set acquired by
measuring the power received by the antenna versus azimuth in the radiation pattern.
MSP, Maximum Signal Position
The angle location (measured in degrees) where the MSL was found.
Half-Power
Half-power in dB = 10 log10
P1
1
= 10 log10 = − 3 dB
P2
2
HPBW, Half-Power Beam Width
This is distance, in degrees, between the two angles where the radiation pattern has
diminished by 3 dB. This is a figure of merit for the directivity of an antenna.
Wavelength
This is distance (measured in meters m) between two identical points in the adjacent
cycle sod a wav form propagated in free space or along a transmission line. The symbol
used for wavelength is the Greek letter lambda (λ).
<latexit sha1_base64="gqzZJFwY5kHHvUTxMOXaAihZZVg=">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</latexit>
y
<latexit sha1_base64="+JBa7Ney76HFjdQSrnNdtiaVVIo=">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</latexit>
<latexit sha1_base64="GjE6rBFr86lMX+pXb12fNbXgkHo=">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</latexit>
<latexit sha1_base64="+JBa7Ney76HFjdQSrnNdtiaVVIo=">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</latexit>
x
<latexit sha1_base64="+JBa7Ney76HFjdQSrnNdtiaVVIo=">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</latexit>
Figure L1.2: Wavelength
c
where c is the speed of light,
f
approximately 3 × 108 m/s and f is the frequency of the signal in Hz.
In free space, λ is calculated as follows: λ =
J.Coffey, Revised 01/23
Page 2 of 5
EL 332 Electromagnetic Waves
Lab #1: Antenna Software Orientation
Lab Procedure:
Work with your assigned lab partner(s) at one of the computer stations to accomplish these
procedures. Take notes on your lab-notebook page about the key things that you learn and the
required calculations mentioned: (Note: LMB = click the left mouse button; RMB = click the
right mouse button)
1. Login to the computer
2. Start LVDAM-ANT from the desktop or from the Start menu.
a. When the program opens you will see a window named “Application Selection”
i. For this exercise, select “Work in stand-alone mode”
ii. Now, click “OK”
1. Later in the lab one station will be connected directly to the antenna measurement
system via USB, and at that time the operator of that station should not select the
stand-alone: Remember this for later.
2. These details are in the lab manual for the Antenna Measurement System. An
empty polar-plot should now be displayed on your screen
b. You need to understand several things about the display on your screen. Lets take them
one at a time:
i. The menu options are: File Edit View Acquisition Tools Help
1. LMB - “File”
a. LMB - “Open”
i. Go to C:\Program Files(x86)\Festo Didactic\LVDAMANT\Samples\Dipol_l2.ant and “Open”
2. LMB - “View”
a. LMB on “3D” - notice the 3D view
1. You may get an exception error-continue, then if it dies, try it again.
i. LMB and drag the “donut blob” that is the 3D radiation pattern
ii. move the blob to see the top down view
iii. LMB on “EH”
1. LMB & Hold & drag to see different perspectives
2. Explain how the 3D and EH views relate to each other
b. Return to the “2D” by clicking on the “2D” tab in the viewing area
i. Toggle back and forth between the views
ii. NOTE: For future reference you can have multiple files open at the same
time for comparison purposes
3. Do LMB - “File”. We are going to set up the printer and print view the 2D &
Cartesian views
a. LMB - “Page Setup”
i. Type in the title, “<your name> Half-Wave Dipole #1"
ii. Under “Documents to print”, choose “2D” and “Cartesian View”
b. LMB - File - “Print Preview”
J.Coffey, Revised 01/23
Page 3 of 5
EL 332 Electromagnetic Waves
Lab #1: Antenna Software Orientation
i.
Notice what will be printed
1. You may print hard copy if you like. The default printer is in the lab.
Close for now.
ii. If you wanted to print to another printer:
1. LMB - “Print” and select a Name for the printer as normal for
Windows printers
2. Most often you want to print to a file and distribute it to your
teammates to evaluate and include in their lab report:
a. “Close” and go back to “File” - “Print” and select the printer to be
Microsoft Print to PDF or Microsoft XPS Document Writer
b. OK - Follow the prompts to store the file in a desirable location.
ii.
LMB - on the tabs for 2D and 3D or go to “View” to activate tabs if they are not
shown in the plot area
1.
LMB the “2D” tab and then the “EH” tab:
a.
do you understand how these plots relate?
1.
explain it to your partner and then write it on your Lab Notebook
page
2.
Make sure you are now in the 2D mode
a.
Click View - Cursors
i.
click and drag the end of one of the cursors
ii.
notice the dB value changes in the “File Manager” window, seen at the
right, as you move
b.
Turn off the H-plane in the File manager by clicking the “H” button in File
Manager window
3.
Find the HPBW, two ways
a.
the value of the HPBW is provided in the “File Manager” window when
the cursors are off
i.
turn the cursors OFF using View - Cursors
ii.
read the value of the HPBW in the File Manager window for this
antenna
1.
record this value on your Lab Notebook Page (LNB)
2.
Now, find it manually using the following steps
b.
turn the cursors ON using View - Cursors
i.
notice the changes in the File Manager window under “File Manager”
ii.
click and drag one of the cursors to find the maximum value of the
radiation pattern which should be in either the first or second quadrant
1.
record this dB value
2.
subtract 3 dB from the value
3.
click and drag the cursors to the two places, respectively, to
azimuth of the locations on the radiation pattern that are 3dB less
than the maximum value
4.
read the “Diff.” in the viewing area
J.Coffey, Revised 01/23
Page 4 of 5
EL 332 Electromagnetic Waves
Lab #1: Antenna Software Orientation
a.
b.
4.
iii.
1.
iv.
1.
2.
v.
1.
vi.
1.
this is the manual reading of the HPBW
do a percent difference comparison to the “File Manager”
result for HPBW
c.
Turn the “H” plane plot back to the ON state
Investigate the purpose of the “Status Bar” in the “View” menu, then turn the
Status Bar back to the ON state
Concerning “Acquisition”
Use this menu item to “connect” to the Antenna Measurement system when
you come to lab to do antenna laboratories
Now, with the display in 2D, LMB on Tools - Options
change the zero position of the plot, such as “side” and apply to see the impact
also click and drag the plot ( to rotate it to a new position)
LMB on the trace to highlight the trace
then “Tools” - “Set MSL Position” to different locations such as 0 degrees OK - observe
Tools - Colors and change the background to white then back to black
This may be helpful if you want to do a screen capture or something to place it
into a Word document
3. Done - now go live with an antenna. Tell Mr. Coffey you are ready for the live, second part.
J.Coffey, Revised 01/23
Page 5 of 5