Using Em Quest Viewer Supplement
Content
Using Usin g EMQue EMQues s t™ Viewer Viewer for Ante Ant enna Pa Patte tt ern File il es Supplemental Guide
Table of Contents Introduction ................................................................................................................................................4 Step 1:
Download EMQuest Viewer and Pattern Files .......................................................................4
Step 2:
Open a Pattern File ................................................................................................................8
Step 3:
Find the 3 dB or Half-power Beamwidth...............................................................................10
Step 4:
Find Front-to-back Ratio and Sidelobe Level .......................................................................15
ETS-Lindgren L.P. reserves the right to make changes to any product described herein in order to improve function, design, or f or any other reason. Nothing contained herein shall constitute ETS-Lindgren L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. ETS-Lindgren L.P. does not convey any license under its patent rights or the rights of others. © Copyright 2008 by ETS-Lindg ren L.P. All Rights Reserved. No part of this document m ay be copied b y any means without written permission from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo and EMQuest are trademarks of ETS-Lindgren L.P. Revisi on Record | MANUAL,USING EMQUEST VIEWER | Part #399292, Rev. A Revision
Description
Date
A
Initial Release
June, 2008
Internet Address
http://www.ets-lindgren.com USA
Finland
1301 Arrow Point Drive Cedar Park, TX 78613 USA Tel: +1.512.531.6400 Fax: +1.512.531.6500 Email: [email protected]
Mekaanikontie 1, 27510 Eura, Finland Tel: +358.2.838.330 Fax: +358.2.865.1233 Email: [email protected]
Japan
China
4-2-6, Kohinata Bunkyo-ku, Tokyo 112-0006 Japan Tel: +81.3.3813.7100 Fax: +81.3.3813.8068 Email: [email protected]
B506 Technology Fortune Center No. 8 Xue Qing Road Haidian District Beijing 100085 China Tel: +86.010.827.30877 Fax: +86.010.827.55307 Email: [email protected]
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iii
Introduction This document describes how to use EMQuest™ Viewer to identify the beamwidths and the front-to-back ratio from the pattern information of ETS-Lindgren antennas. Steps to obtain the typical parameters that can be obt ained from the normalized radiation pattern are provided.
Customers interested in using the antenna as a feed t o a reflector can use the same procedure to obtain a 3 dB, half-power, or 10 dB beamwidth. Radiation pattern information is available for most E TS-Lindgren antennas. The antennas have been measured at the ETS-Lindgren A2LA-certified Calibration Lab. Two anechoic chambers for antenna measurement are located at the ETS-Lindgren facility in Cedar Park, Texas: •
Tapered anechoic chamber—For measurements 400 MHz to 6 GHz
•
Rectangular anechoic chamber—For measurements 700 MHz to 18 GHz
Step 1: Download EMQuest Viewer and Pattern Files
4
1.
Go to www.ets-lindgren.com.
2.
On the Products menu, click Software.
|
Using EMQuest™ Viewer fo r Ant enna Pattern Files
3.
On the Software page, click EMQuest™ Viewer .
4.
On the EMQuest™ Viewer page, click Download EMQuest™ Viewer . The EMQuest™ Viewer page provides the minimum system requirements and recommended system requirements to run EMQuest Viewer.
Using EMQuest™ Viewer for Antenna Pattern Files
|
5
Follow the steps to download and save the ZIP to the desired location on your computer.
5.
Click the ZIP to extract the EMQuest Viewer executable. Click the executable to install EMQuest Viewer.
On the EMQuest™ Viewer page, click View Antenna Patterns to Download .
6.
Some of the antenna pattern files are full 3D patterns and some are principal plane cuts of the pattern. Later steps in this guide include instructions to extract the parameters for 3D patterns and 2D principal planes.
6
|
Using EMQuest™ Viewer fo r Ant enna Pattern Files
Step 4: Find Front-to -back Ratio and Sidelobe Level 1.
Using the steps in the previous sections, open the antenna patt ern file and obtain the polar plot in the two principal planes.
2.
Right-click on the plot to display the Graph Settings window.
3.
Click the Scale tab and type the Y-axis setting in the Y Step box. For an example, see step 6 on page 12.
4.
Click the Dimension Depth tab, and then move the slider to the desired frequency. Click OK .
5.
Click the Cursor Readout button, and then move your cursor over the graph.
6.
Move the cursor to the largest sidelobe. The cursor readout will display the level and angle of the sidelobe. The level of the largest sidelobe is the sidelobe level for that given plane and frequency. In this example, the sidelobe level is -13.7 dB.
Using EMQuest™ Viewer for Antenna Pattern Files
|
15
Move the cursor to point to the pattern on the opposite direction of the main beam. The value read on t he cursor
7.
readout is the front-to-back ratio at that particular frequency.
16
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Using EMQuest™ Viewer fo r Ant enna Pattern Files
Table of Contents Introduction ................................................................................................................................................4 Step 1:
Download EMQuest Viewer and Pattern Files .......................................................................4
Step 2:
Open a Pattern File ................................................................................................................8
Step 3:
Find the 3 dB or Half-power Beamwidth...............................................................................10
Step 4:
Find Front-to-back Ratio and Sidelobe Level .......................................................................15
ETS-Lindgren L.P. reserves the right to make changes to any product described herein in order to improve function, design, or f or any other reason. Nothing contained herein shall constitute ETS-Lindgren L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. ETS-Lindgren L.P. does not convey any license under its patent rights or the rights of others. © Copyright 2008 by ETS-Lindg ren L.P. All Rights Reserved. No part of this document m ay be copied b y any means without written permission from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo and EMQuest are trademarks of ETS-Lindgren L.P. Revisi on Record | MANUAL,USING EMQUEST VIEWER | Part #399292, Rev. A Revision
Description
Date
A
Initial Release
June, 2008
Internet Address
http://www.ets-lindgren.com USA
Finland
1301 Arrow Point Drive Cedar Park, TX 78613 USA Tel: +1.512.531.6400 Fax: +1.512.531.6500 Email: [email protected]
Mekaanikontie 1, 27510 Eura, Finland Tel: +358.2.838.330 Fax: +358.2.865.1233 Email: [email protected]
Japan
China
4-2-6, Kohinata Bunkyo-ku, Tokyo 112-0006 Japan Tel: +81.3.3813.7100 Fax: +81.3.3813.8068 Email: [email protected]
B506 Technology Fortune Center No. 8 Xue Qing Road Haidian District Beijing 100085 China Tel: +86.010.827.30877 Fax: +86.010.827.55307 Email: [email protected]
|
iii
Introduction This document describes how to use EMQuest™ Viewer to identify the beamwidths and the front-to-back ratio from the pattern information of ETS-Lindgren antennas. Steps to obtain the typical parameters that can be obt ained from the normalized radiation pattern are provided.
Customers interested in using the antenna as a feed t o a reflector can use the same procedure to obtain a 3 dB, half-power, or 10 dB beamwidth. Radiation pattern information is available for most E TS-Lindgren antennas. The antennas have been measured at the ETS-Lindgren A2LA-certified Calibration Lab. Two anechoic chambers for antenna measurement are located at the ETS-Lindgren facility in Cedar Park, Texas: •
Tapered anechoic chamber—For measurements 400 MHz to 6 GHz
•
Rectangular anechoic chamber—For measurements 700 MHz to 18 GHz
Step 1: Download EMQuest Viewer and Pattern Files
4
1.
Go to www.ets-lindgren.com.
2.
On the Products menu, click Software.
|
Using EMQuest™ Viewer fo r Ant enna Pattern Files
3.
On the Software page, click EMQuest™ Viewer .
4.
On the EMQuest™ Viewer page, click Download EMQuest™ Viewer . The EMQuest™ Viewer page provides the minimum system requirements and recommended system requirements to run EMQuest Viewer.
Using EMQuest™ Viewer for Antenna Pattern Files
|
5
Follow the steps to download and save the ZIP to the desired location on your computer.
5.
Click the ZIP to extract the EMQuest Viewer executable. Click the executable to install EMQuest Viewer.
On the EMQuest™ Viewer page, click View Antenna Patterns to Download .
6.
Some of the antenna pattern files are full 3D patterns and some are principal plane cuts of the pattern. Later steps in this guide include instructions to extract the parameters for 3D patterns and 2D principal planes.
6
|
Using EMQuest™ Viewer fo r Ant enna Pattern Files
Step 4: Find Front-to -back Ratio and Sidelobe Level 1.
Using the steps in the previous sections, open the antenna patt ern file and obtain the polar plot in the two principal planes.
2.
Right-click on the plot to display the Graph Settings window.
3.
Click the Scale tab and type the Y-axis setting in the Y Step box. For an example, see step 6 on page 12.
4.
Click the Dimension Depth tab, and then move the slider to the desired frequency. Click OK .
5.
Click the Cursor Readout button, and then move your cursor over the graph.
6.
Move the cursor to the largest sidelobe. The cursor readout will display the level and angle of the sidelobe. The level of the largest sidelobe is the sidelobe level for that given plane and frequency. In this example, the sidelobe level is -13.7 dB.
Using EMQuest™ Viewer for Antenna Pattern Files
|
15
Move the cursor to point to the pattern on the opposite direction of the main beam. The value read on t he cursor
7.
readout is the front-to-back ratio at that particular frequency.
16
|
Using EMQuest™ Viewer fo r Ant enna Pattern Files
