ETS-Lindgren 3109 User manual

Model 3109
Biconical Antenna
User Manual

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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 1989–2011 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 3109 | Part #399038, Rev. F
Revision
Description
Date
A—C
Initial Release; updates / edits
1989—2002
D
Added P/XP options
October, 2002
E
Updated PX branding; updated
Mounting Instructions;rebrand
February, 2009
F
Updated Physical Specifications
October, 2011

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Table of Contents
Notes, Cautions, and Warnings................................................v
1.0 Introduction..........................................................................7
Optional Items ............................................................................................ 8
Model 3109P—Portable Elements ...................................................... 8
Model 3109PX—Extended Portable Elements.................................... 8
Carrying Cases................................................................................... 8
Tripod Options.................................................................................... 9
ETS-Lindgren Product Information Bulletin ............................................... 10
2.0 Maintenance .......................................................................11
Annual Calibration .................................................................................... 11
Replacement and Optional Parts .............................................................. 12
Service Procedures .................................................................................. 12
3.0 Specifications.....................................................................13
Electrical Specifications............................................................................ 13
Physical Specifications ............................................................................. 14
Model 3109....................................................................................... 14
Model 3109P (With Portable Elements)............................................. 15
Model 3109PX (With Extended Portable Elements) .......................... 16
4.0 Assembly Instructions ......................................................17
5.0 Mounting Instructions .......................................................19
Additional Mounting Options..................................................................... 20
4-TR Mounting Options..................................................................... 20
7-TR and Mast Mounting Options...................................................... 21
2x2 Boom Mounting Options............................................................. 22
6.0 Application .........................................................................23
7.0 Typical Data........................................................................25
Model 3109 Typical Data.......................................................................... 25
Model 3109 Antenna Factor.............................................................. 25
Model 3109 Gain .............................................................................. 26
Model 3109 VSWR ........................................................................... 27
Model 3109 Half-Power Beamwidth.................................................. 28

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Model 3109 Forward Power @ 1 M–Derived from AF....................... 29
Model 3109 Forward Power @ 3 M–Derived from AF....................... 30
Model 3109 Forward Power @ 3 M–Measured over
Conducting Ground........................................................................... 31
Model 3109 Forward Power @ 3 M–Measured over Ferrite Ground.. 32
Model 3109P Typical Data........................................................................ 33
Model 3109P VSWR......................................................................... 33
Model 3109PX Typical Data...................................................................... 34
Model 3109PX Antenna Factor......................................................... 34
Model 3109PX Gain.......................................................................... 35
Model 3109PX VSWR....................................................................... 36
Model 3109PX Forward Power @ 3 M—Derived from AF................. 37
Model 3109PX Forward Power @ 3 M—Measured over Conducting
Ground.............................................................................................. 38
Appendix A: Warranty .............................................................39

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Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
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.
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.

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Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 3109 Biconical Antenna is designed to operate over
the 20 MHz to 300 MHz frequency range for generating high levels of
electromagnetic (EM) fields. The ability to handle high power levels over a
broadband makes the Model 3109 excellent for use in radiated susceptibility
testing.
The assembly design of the Model 3109 provides for easy storage and
portability. The standard biconical elements are made from welded aluminum.
The 4-to-1 ratio balun network is fabricated from TFE thermoplastics and
specially machined brass and aluminum support and contact parts. The bifilar
inductors of the balun are wound in precision machined cuts to provide high
barrier insulation between windings while simultaneously giving good coupling
between bifilar windings.
The balun acts as base on the Model 3109 and is configured to accept an
ETS-Lindgren tripod or most other tripods. For information on tripods, see
Tripod Options on page 9. For the variety of mounting options available for the
Model 3109, see Mounting Instructions on page 19.
The Model 3109 is individually calibrated at 1 m per SAE ARP 958 and 3 m and
10 m per ANSI C63.5. Actual factors and a signed Certificate of Calibration
Conformance are included.
Because slight variations in testing environments can affect the field
characteristics around an antenna, it is recommended that a field probe be used
to accurately determine the field strength in the region under test.

8 | Introduction
Optional Items
MODEL 3109P—PORTABLE ELEMENTS
Collapsible folding elements are available, making the Model 3109 portable and
ideal for field use. Both the standard rigid and optional folding elements attach to
the balun using screw mounts. This makes changing between the two types of
elements quick and easy.
MODEL 3109PX—EXTENDED PORTABLE ELEMENTS
An extended version of the portable element is available. These folding elements
are twice as long as the standard elements. The longer elements enable you to
generate high fields at low frequencies with reduced applied power.
CARRYING CASES
Carrying cases for biconical antennas and portable elements are available.

Introduction | 9
TRIPOD OPTIONS
ETS-Lindgren offers the following nonmetallic, 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.
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.

10 | Introduction
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

Maintenance | 11
2.0 Maintenance
Before performing any maintenance,
follow the safety information in the
ETS-Lindgren Product Information
Bulletin included with your shipment.
Maintenance of the Model 3109 is limited
to external components such as cables
or connectors.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
Annual Calibration
If you have the Model 3109P (with portable elements) or
Model 3109PX (with extended portable elements), include the
portable elements with the balun when sending for calibration.
See the Product Information Bulletin included with your shipment for information
on ETS-Lindgren calibration services.
WARRANTY

12 | Maintenance
Replacement and Optional Parts
ETS-Lindgren may substitute a similar part or new part number with
the same functionality for another part/part number. Contact
ETS-Lindgren for questions about part numbers and ordering parts.
Following are the part numbers for ordering replacement or optional parts for the
Model 3109.
Part Description
Part Number
Model 3109
3109
Model 3109P (with portable elements)
3109P
Model 3109PX (with extended portable elements)
3109PX
Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.

Specifications | 13
3.0 Specifications
Electrical Specifications
Frequency Range:
20 MHz–300 MHz
VSWR Ratio (Average):
1.9:1
Maximum Continuous Power:
2 kW
Peak Power:
3 kW
Impedance (Nominal):
50 Ω
Connector:
Type N female

14 | Specifications
Physical Specifications
MODEL 3109
One element is shown for illustrative purposes only; all specifications
are based on the balun plus both elements.
Width (includes elements and balun):
131.1 cm (51.6 in)
Diameter:
51.1 cm (20.1 in)
Weight (includes elements and balun):
2.6 kg (5.8 lb)

Specifications | 15
MODEL 3109P (WITH PORTABLE ELEMENTS)
One element is shown for illustrative purposes only; all specifications
are based on the balun plus both elements.
Width (includes elements and balun):
120.9 cm (47.6 in)
Diameter:
64.1 cm (25.3 in)
Weight (includes elements and balun):
2.4 kg (5.4 lb)

16 | Specifications
MODEL 3109PX (WITH EXTENDED PORTABLE ELEMENTS)
One element is shown for illustrative purposes only; all specifications
are based on the balun plus both elements.
Width (includes elements and balun):
223.0 cm (87.8 in)
Diameter:
123.3 cm (48.6 in)
Weight (includes elements and balun):
3.1 kg (6.8 lb)

Assembly Instructions | 17
4.0 Assembly Instructions
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
The Model 3109 Biconical Antenna is shipped unassembled, and includes these
parts:
Balun
Biconical element (2)
Belleville washer (2)

18 | Assembly Instructions
To assemble the Model 3109:
1. Slide a belleville washer onto the threaded screw end of one of the
biconical elements.
2. Line up the screw threads with the receptacle hole on the balun and
turn the biconical element until it is firmly secured in the balun.
Do not cross thread this connection or
permanent damage to the joint could occur.
3. Repeat step 1 and step 2 using the remaining washer and biconical
element.

Mounting Instructions | 19
5.0 Mounting Instructions
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
The balun unit of the Model 3109 Biconical Antenna provides two 1/4–20 thread
receptacles for mounting.
To mount the balun onto a tripod, insert a 1/4–20 thread mounting screw or knob
from the tripod into the receptacle.

20 | Mounting Instructions
Additional Mounting Options
4-TR MOUNTING OPTIONS
Following are additional options for mounting the Model 3109 onto an
ETS-Lindgren 4-TR Tripod. Contact the ETS-Lindgren Sales Department for
information on ordering optional mounting hardware.