ETS-Lindgren 3104D User manual

Model 3104D
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 2015 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,3104D | Part #399398, Rev. A
Revision
Description
Date
A
Initial Release
November, 2015

ets-lindgren.com
iii
Table of Contents
Notes, Cautions, and Warnings................................................v
1.0 Introduction..........................................................................7
Optional Items ............................................................................................ 8
Portable Elements (3104DP)............................................................... 8
Extended Portable Elements (3104DPX) ............................................ 8
Carrying Cases................................................................................... 8
Tripod Options.................................................................................... 8
ETS-Lindgren Product Information Bulletin ................................................. 9
2.0 Maintenance .......................................................................11
Replacement and Optional Parts .............................................................. 11
Service Procedures .................................................................................. 12
Contacting ETS-Lindgren.................................................................. 12
Sending a Component for Service..................................................... 12
Calibration Services and Annual Calibration...................................... 12
3.0 Specifications.....................................................................13
Electrical Specifications............................................................................ 13
Physical Specifications ............................................................................. 13
4.0 Assembly Instructions ......................................................15
5.0 Mounting Instructions .......................................................17
Using Included Mounting Adapters on a 4-TR........................................... 17
Using the Stinger to Mount to a Model 2175 MiniMast .............................. 18
Additional Mounting Options..................................................................... 19
4-TR Mounting Options..................................................................... 19
7-TR and Mast Mounting Options...................................................... 20
2x2 Boom Mounting Options............................................................. 21
6.0 Operation............................................................................23
7.0 Typical Data........................................................................25
Model 3104D Antenna Factor................................................................... 25
Model 3104D Gain.................................................................................... 26
Model 3104D VSWR................................................................................. 27
Model 3104D Half-Power Beamwidth........................................................ 28

iv
ets-lindgren.com
Model 3104D Forward Power ................................................................... 29
@ 1 M–Derived from AF ................................................................... 29
@ 3 M–Derived from AF ................................................................... 30
@ 3M–Measured over Conducting Ground....................................... 31
Appendix A: Warranty.............................................................33
Duration of Warranties.............................................................................. 33

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
Introduction
7
1.0 Introduction
The ETS-Lindgren Model 3104D Biconical Antenna is designed to operate
over the 20 MHz to 200 MHz frequency range to meet Military and Department of
Defense EMI specifications. The Model 3104D is designed and precisely
manufactured to conform to the requirements of MIL-STD-461 and other Military
Standards as reflected in Drawing ES-F-201286.
The Model 3104D includes a stinger mount, which permits on-axis rotation during
polarization of the antenna.
The biconical elements are made from welded aluminum. The elements mount in
a balun network fabricated of phenolic and equipped with the necessary
impedance-matching components. The lightweight construction provides easy
handling and storage.
Each antenna is individually calibrated during the manufacturing process. The
results of these calibrations are included for use in specification compliance
testing.
Stinger
mount

8
Introduction
ets-lindgren.com
Optional Items
PORTABLE ELEMENTS (3104DP)
Collapsible folding elements are available, making the Model 3104D 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.
EXTENDED PORTABLE ELEMENTS (3104DPX)
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.
TRIPOD OPTIONS
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.

ets-lindgren.com
Introduction
9
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

10
Introduction
ets-lindgren.com
This page intentionally left blank.

ets-lindgren.com
Maintenance
11
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 3104D is limited to
external components such as cables or connectors.
If you have any questions concerning maintenance,
contact ETS-Lindgren Customer Service.
Replacement and Optional Parts
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 replacement or optional parts for the
Model 3104D.
Part Description
Part Number
Belleville Washer, 5/16
910035
Set Screw, 5/16–18 x 3/4
910034
WARRANTY

12
Maintenance
ets-lindgren.com
Service Procedures
CONTACTING ETS-LINDGREN
Note: Please see www.ets-lindgren.com for a list of ETS-Lindgren
offices, including phone and email contact information.
SENDING A COMPONENT FOR SERVICE
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
CALIBRATION SERVICES AND ANNUAL CALIBRATION
See the Product Information Bulletin included with your shipment for information
on ETS-Lindgren calibration services.

ets-lindgren.com
Specifications
13
3.0 Specifications
Electrical Specifications
Frequency Range:
20 MHz–200 MHz
Impedance:
Matched to 50 Ω
VSWR Ratio (Average):
2.8:1
Power Input Capability:
50 Watts continuous power
100 Watts short-term peak power
Connector:
Type N
Physical Specifications
Length:
134.6 cm (53.0 in)
Depth:
96.5 cm (38 in)
Diameter:
53.3 cm (21 in)
Weight:
2.7 kg (6.0 lb)

14
Specifications
ets-lindgren.com
This page intentionally left blank.

ets-lindgren.com
Assembly Instructions
15
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 3104D Biconical Antenna is shipped unassembled, and includes
these parts:
Balun
Biconical element (2)
Belleville washer (2)
100733 Support Rod
101942B Support Base
102108 Clamp Block

16
Assembly Instructions
ets-lindgren.com
To assemble the Model 3104D:
Note: To order replacement belleville washers or threaded screws,
see Replacement and Optional Parts on page 11.
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.

ets-lindgren.com
Mounting Instructions
17
5.0 Mounting Instructions
Caution: Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your shipment.
Caution: The Model 3104D is a precision measurement
device. Handle with care.
Using Included Mounting Adapters on a 4-TR
The Model 3104D Biconical Antenna ships with the following adapters, used to
mount the antenna to a 4-TR tripod:
102108 Clamp Block—Uses
standard 7/8–14 threads and comes
with a 1/4–20 thread adapter for
mounting to an ETS-Lindgren tripod
or most other tripods.
100733 Support Rod
101942B Support Base

18
Mounting Instructions
ets-lindgren.com
To use these adapters to mount the Model 3104D to a 4-TR tripod:
1. Assemble the clamp block, support base, and support rod.
2. Attach the support base to the 4-TR tripod.
3. Unscrew the clamp block latch and open the top.
4. Insert the shaft of the balun into the clamp block and close the top.
5. Move the latch to the closed position and tighten so the antenna is held
securely.
6. Attach the cable to the output connector on the antenna.
Using the Stinger to Mount to a Model 2175 MiniMast
The stinger mount provides on-axis rotation during 90°horizontal or vertical
polarization. The stinger enables you to mount the antenna directly to an
ETS-Lindgren 7-TR Tripod or mast.
Shown stinger-mounted onto a 7-TR

ets-lindgren.com
Mounting Instructions
19
Additional Mounting Options
4-TR MOUNTING OPTIONS
Following are additional options for mounting the Model 3104D onto an
ETS-Lindgren 4-TR Tripod. Contact the ETS-Lindgren Sales Department for
information on ordering optional mounting hardware.

20
Mounting Instructions
ets-lindgren.com
7-TR AND MAST MOUNTING OPTIONS
Following are options for mounting the Model 3104D onto an ETS-Lindgren 7-TR
Tripod or mast. Contact the ETS-Lindgren Sales Department for information on
ordering optional mounting hardware.
Note: Mast refers to 2070 Series, 2075, and 2175 Antenna Towers.
7-TR refers to these booms:
109042 boom—Straight boom; for general antenna mounting
on a 7-TR
108983 boom—Offset boom; for general antenna mounting on
a 7-TR with pneumatic or manual polarization; can also be used
to mount stinger-type antennas
118947—For stinger-type antennas only
108507 boom—Centerline rotation boom for Model 3106 Series
antennas only; when changing polarization, maintains
centerline rotation