ETS-Lindgren 3145BDP User Manual
Model 3145BDP
Dual-Polarized
Log-Periodic Dipole Array
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 2007–2008 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,3145BDP,LOG PERIODIC,DUAL-POLARIZED | Part #399803, Rev. A
Revision Description Date
1 Custom Release September, 2007
A Standard Release; rebrand June, 2008
ii |
Table of Contents
Notes, Cautions, and Warnings................................................ v
1.0 Introduction..........................................................................7
Model 3145BDP Optional Items ....................................................................7
ETS-Lindgren Product Information Bulletin ...................................................9
2.0 Maintenance....................................................................... 11
Annual Calibration .......................................................................................11
Replacement and Optional Parts.................................................................11
Service Procedures .....................................................................................12
3.0 Specifications.....................................................................13
Electrical Specifications ............................................................................... 13
Physical Specifications ................................................................................13
4.0 Practical Application .........................................................17
5.0 Mounting the Model 3145BDP.......................................... 19
Model 3145BDP Base .................................................................................19
Model 3145BDP Mounting Diagram ............................................................21
6.0 Typical Data........................................................................23
Model 3145BDP Antenna Factor ................................................................. 23
Model 3145BDP Gain .................................................................................. 24
Appendix A: Warranty............................................................. 25
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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 3145BDP Dual-Polarized Log-Periodic Dipole
Array is a dual linearly polarized, broadband antenna designed to operate over
the frequency range of 100 MHz to 1.1 GHz. The precise design of the feed and
positioning of the elements on the boom yields 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 3145BDP is manufactured from stainless steel, making it ideal for
prolonged outdoor use. A high resistance to oxidation and corrosion enables the
antenna to withstand a harsh operating environment. For a lighter-weight
antenna for indoor use, the Model 3145BDP may also be manufactured from
aluminum. Contact the ETS-Lindgren Sales Department for information on
custom antennas.
The Model 3145BDP is calibrated at 10 m per ANSI C63.5. Actual antenna
factors and a signed Certificate of Calibration Conformance are included with the
antenna.
Model 3145BDP Optional Items
The base of the Model 3145BDP features four mounting holes and two Type N
connectors. The holes may be used to mount the antenna to the optional
ETS-Lindgren 109620 Pedestal, or to a customer-defined mounting solution.
Introduction | 7
The 109620 pedestal is a wheeled
positioning system that provides tilt
adjustment and horizontal and
vertical polarization. A pneumatic
cylinder is used to change
polarization, and can be controlled
remotely using an optional
ETS-Lindgren Model 2090
Multi-Device Controller (or next
generation ETS-Lindgren controller,
if applicable).
For information on ordering optional
items, contact ETS-Lindgren.
109620 pedestal shown with mounted
ETS-Lindgren Model 3159 antenna
See Mounting the Model 3145BDP on page 19 for more information.
8 | Introduction
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