ETS-Lindgren 3144 User Manual
Model 3144
Log Periodic
Dipole Array Antenna
User Manual
ETS-Lindgren L.P. reserves the right to make changes to any product described
herein in order to improve function, design, or for 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 1997–2010 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record
MANUAL 3144 LOG PERIODIC ANTENNA | Part # 399171, Rev. E
Revision Description Date
A–C Initial Release
Updates/edits
Updates/edits
D Updates/edits September, 2002
E Rebrand September, 2010
ii |
January, 1997
Table of Contents
Notes, Cautions, and Warnings ................................................ v
1.0 Introduction .......................................................................... 7
Optional Items ................................................................................................ 8
Support Rod ........................................................................................... 8
Tripod ..................................................................................................... 8
ETS-Lindgren Product Information Bulletin ................................................... 9
2.0 Maintenance ....................................................................... 11
Maintenance Recommendations ................................................................. 11
Annual Calibration ....................................................................................... 11
Service Procedures ..................................................................................... 11
3.0 Specifications ..................................................................... 13
Electrical Specifications ............................................................................... 13
Physical Specifications ................................................................................ 13
4.0 Mounting & Assembly ....................................................... 15
Mounting Instructions ................................................................................... 15
Using Included Mounting Adapters ...................................................... 15
Additional 4-TR Mounting Options ....................................................... 17
Additional 7-TR and Mast Mounting Options ....................................... 18
Additional 2x2 Boom Mounting Options .............................................. 19
Assembly Instructions .................................................................................. 20
5.0 Application ......................................................................... 21
6.0 Typical Data ........................................................................ 23
Model 3144 Antenna Factor ........................................................................ 23
Model 3144 Gain ......................................................................................... 23
Model 3144 VSWR ...................................................................................... 24
Model 3144 Half-Power Beamwidth ............................................................ 24
Model 3144 Forward Power 1M ................................................................... 25
Model 3144 Forward Power 3M ................................................................... 25
Appendix A: Warranty ............................................................. 27
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iv |
Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow
instructions could result in minor personal injury
and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow
instructions could result in SEVERE personal injury
and/or property damage. Included text gives proper
procedures.
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vi |
1.0 Introduction
The ETS-Lindgren Model 3144
Log Periodic Dipole Array is a
linearly polarized, broadband
antenna designed to operate over the
frequency range of 80 MHz to 2 GHz.
The choice of scaling factors, the various diameters of each element, and the
center-to-center spacing of the booms are such that excellent VSWR
characteristics are obtained throughout the operating frequency range.
The precise design of the feed and the positioning of the elements on the boom
yield optimum phase relationship. This causes the active region, at any given
frequency, to propagate RF energy towards the smaller elements leaving the
elements behind it electrically dead.
The constant gain of the antenna yields an antenna factor which varies linearly
with frequency. The variation is smooth; therefore, accurate interpolation of
performance between specified frequency points is simple.
The Model 3144 is provided with an integral mount and the necessary
attachments to mount the antenna to either a tripod (with a 1/4–20 threaded
mount) or an ETS-Lindgren antenna mast. For the variety of mounting options
available for the Model 3144, see Mounting & Assembly on page
Each Model 3144 is individually calibrated at one meter per SAE ARP 958 and at
three and 10 meters per ANSI C63.5. Actual antenna factors and a signed
Certificate of Calibration Conformance are included.
Introduction | 7
15.
Optional Items
SUPPORT ROD
Antenna mount with insert drilled to accept ETS-Lindgren or other tripods with
standard 1/4–20 threads.
TRIPOD
ETS-Lindgren offers the following non-metallic, non-reflective tripods for use at
both indoor and outdoor EMC test sites.
• 4-TR Tripod—Constructed of linen
phenolic and delrin, designed with an
adjustable center post for precise height
adjustments. Maximum height is 2.0 m
(80.0 in), and minimum height is 94 cm
(37.0 in). This tripod can support up to
an 11.8 kg (26.0 lb) load.
8 | Introduction
• 7-TR Tripod—Constructed of PVC and
fiberglass components, providing
increased stability for physically large
antennas. The unique design allows for
quick assembly, disassembly, and
convenient storage. Allows several
different configurations, including options
for manual or pneumatic polarization.
Quick height adjustment and locking
wheels provide ease of use during
testing. Maximum height is 2.17 m
(85.8 in), with a minimum height of 0.8 m
(31.8 in). This tripod can support a
13.5 kg (30 lb) load.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
Introduction | 9
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