ESCO Technologies ETS-Lindgren 3109 User manual

Model 3109
Biconical Antenna
User Manual

ii ets-lindgren.com
ETS-Lindgren Inc. reserves the right to make changes to any products herein to improve
functioning or design. Although the information in this document has been carefully
reviewed and is believed to be reliable, ETS-Lindgren does not assume any liability arising
out of the application or use of any product or circuit described herein; nor does it convey
any license under its patent rights nor the rights of others. All trademarks are the property
of their respective owners.
© Copyright 1989–2022 by ETS-Lindgren Inc. All Rights Reserved. No part of this
document may be copied by any means without written permission from
ETS-Lindgren Inc.
Trademarks used in this document: The ETS-Lindgren logo is a registered trademark of
ETS-Lindgren Inc.; Delrin is a registered trademark of E. I. du Pont de Nemours and
Company.
Revision Record
MANUAL,3109 | Part #399038, Rev. K
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
G Added optional 7/16 DIN connector August, 2015
H Added Model 3109P 7/16 and
Model 3109PX 7/16
September, 2015
J Corrected electrical specifications May, 2016
K Removed warranty information February, 2022

ets-lindgren.com iii
Table of Contents
Notes, Cautions, and Warnings................................................ v
1.0 Introduction .......................................................................... 7
Application .....................................................................................................8
Optional Items................................................................................................8
Portable Elements .................................................................................8
Extended Portable Elements .................................................................8
DIN Connector .......................................................................................9
Carrying Cases ......................................................................................9
Tripod Options .....................................................................................10
ETS-Lindgren Product Information Bulletin .................................................11
2.0 Maintenance ....................................................................... 13
Model Numbers ...........................................................................................13
Service Procedures .....................................................................................14
Contacting ETS-Lindgren ....................................................................14
Sending a Component for Service.......................................................14
Calibration Services and Annual Calibration .......................................14
3.0 Specifications..................................................................... 15
Electrical Specifications ...............................................................................15
Physical Specifications ................................................................................16
Model 3109 ..........................................................................................16
Model 3109 With Portable Elements ...................................................17
Model 3109 With Extended Portable Elements ...................................18
4.0 Assembly Instructions ...................................................... 19
5.0 Mounting Instructions ....................................................... 21
Using Included Mounting Connectors..........................................................21
Additional Mounting Options........................................................................22
4-TR Mounting Options........................................................................22
7-TR and Mast Mounting Options........................................................23
2x2 Boom Mounting Options ...............................................................24
6.0 Typical Data........................................................................ 25
Model 3109 Typical Data .............................................................................25

iv ets-lindgren.com
Model 3109 Antenna Factor ................................................................25
Model 3109 Gain .................................................................................26
Model 3109 VSWR ..............................................................................27
Model 3109 Half-Power Beamwidth ....................................................28
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

ets-lindgren.com v
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.
Note: See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.

vi ets-lindgren.com
This page intentionally left blank.

ets-lindgren.com Error! No text of specified style in
document. 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 10. For the variety of mounting options available for the
Model 3109, see Mounting Instructions on page 21.
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 Error! No text of specified style in
document. ets-lindgren.com
Application
The Model 3109 provides a broad frequency and a high input power, making it
ideal for IEC 61000-4-3 testing. The antenna uses a modified Guanella balun for
impedance transformation and matching, and it is constructed of much heavier
materials so that maximum continuous input power can reach 2 kW. While this
antenna typically has a high VSWR at frequencies below 70 MHz, it is still
capable of generating high field strength with acceptable input power in this
region of the band. The optional extended elements markedly improve
performance in this region.
Optional Items
Note: For part number and ordering information, see
Model Numbers on page 13.
P ORTABLE E LEMENTS
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.
E XTENDED P ORTABLE E LEMENTS
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.

ets-lindgren.com Error! No text of specified style in
document. 9
DIN CONNECTOR
The standard connector for the Model 3109 is a Type N. As an alternative, the
Model 3109 may be ordered with a 7/16 DIN connector.
Type N Connector (Standard)
7/16 DIN Connector (Optional)
CARRYING CASES
Carrying cases for biconical antennas and portable elements are available.
Contact ETS-Lindgren for ordering information.

10 Error! No text of specified style in
document. ets-lindgren.com
TRIPOD OPTIONS
ETS-Lindgren offers the following non-metallic, non-reflective tripods for use at
both indoor and outdoor EMC test sites. Contact ETS-Lindgren for ordering
information.
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.

ets-lindgren.com Error! No text of specified style in
document. 11
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
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

12 Error! No text of specified style in
document. ets-lindgren.com
This page intentionally left blank.

ets-lindgren.com Error! No text of specified style in
document. 13
2.0 Maintenance
CAUTION: Before performing any maintenance, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your shipment.
WARNING: 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.
Model Numbers
Note: 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 the different versions of the
Model 3109 Biconical Antenna.
Part Description Part Number
Model 3109 3109
Model 3109 with portable elements 3109P
Model 3109 with extended portable elements 3109PX
Model 3109 with 7/16 DIN connector 3109 7/16
Model 3109 with 7/16 DIN connector and
portable elements
3109P 7/16
Model 3109 with 7/16 DIN connector and
extended portable elements
3109PX 7/16
WARRANTY

14 Error! No text of specified style in
document. ets-lindgren.com
Service Procedures
C ONTACTING ETS-L INDGREN
Note: Please see www.ets-lindgren.com for a list of ETS-Lindgren
offices, including phone and email contact information.
S ENDING A C OMPONENT FOR S ERVICE
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
C ALIBRATION S ERVICES AND A NNUAL C ALIBRATION
Note: If you have the Model 3109 with portable elements or 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.

ets-lindgren.com Error! No text of specified style in
document. 15
3.0 Specifications
Electrical Specifications
Frequency Range: 20 MHz–300 MHz
VSWR Ratio (Average): 1.9:1
Maximum Continuous Power: 1 kW (N) 1.5 kW (7/16 DIN)
Peak Power: 2 kW
Impedance (Nominal): 50 Ω
Connector: Standard: Type N female
Optional: 7/16 DIN (must be
specified at time of purchase)

16 Error! No text of specified style in
document. ets-lindgren.com
Physical Specifications
M ODEL 3109
Note: 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)

ets-lindgren.com Error! No text of specified style in
document. 17
M ODEL 3109 W ITH P ORTABLE E LEMENTS
Note: 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)

18 Error! No text of specified style in
document. ets-lindgren.com
M ODEL 3109 W ITH E XTENDED P ORTABLE E LEMENTS
Note: 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)

ets-lindgren.com Error! No text of specified style in
document. 19
4.0 Assembly Instructions
CAUTION: 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)

20 Error! No text of specified style in
document. ets-lindgren.com
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.
Caution: 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.