ETS-LINDGREN 3126 Series Sleeve Dipole Antenna User Manual

ETS-LINDGREN 3126 Series Sleeve Dipole Antenna

Product Information

The 3126 Series Sleeve Dipole Antenna is a product manufactured by ETS- Lindgren Inc. It is an omni-directional antenna with an electric dipole pattern approaching that of a half-wave resonant dipole. The antenna has typical gains between 1.5 dB and 2.0 dB. The product manual for this antenna has a revision record that lists all updates made to the manual and the product. ETS-Lindgren Inc. reserves the right to make changes to any of their products to improve functioning or design.

Product Usage Instructions

Before using the 3126 Series Sleeve Dipole Antenna, please read the ETS- Lindgren Product Information Bulletin for safety, regulatory, and other product marking information. If you have any questions about part numbers or ordering parts, please contact ETS-Lindgren Inc. The 3126 Series Sleeve Dipole Antenna is an omni-directional antenna that can be used for various applications. Follow the instructions in the user manual for proper installation and use of the antenna. The electric dipole pattern of the antenna approaches that of a half-wave resonant dipole and has typical gains between 1.5 dB and 2.0 dB. It is important to note that ETS-Lindgren Inc. 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 used in this document are the property of their respective owners.

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 2004-2023 written permission from 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.; Teflon is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.

Revision Record
MANUAL, 3126 | Part # 399155 Rev E

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.

*All notes, cautions, and warnings will be located on the left column area of the page. See the ETS-Lindgren Product Inft Information Bulletination Bulletin for safety, regulatory, and other product marking information

INTRODUCTION

The ETS-Lindgren 3126 Series sleeve dipole antenna is designed as precision gain references for antenna range calibration and to meet the Cellular Telecommunication and Internet Association (CTIA) ±0.1 dB symmetry requirement for ripple test measurements. These antennas are truly omni-directional, having an electric dipole pattern approaching that of a half-wave resonant dipole with typical gains between 1.5 dB and 2.0 dB. The sleeve dipole design allows the antenna to be end-fed to avoid cable and feed-point interactions that interfere with the performance of the antenna. Integral quarter-wave chokes and/or ferrite loading (depending on frequency range) also helps to reduce cable interaction. This design also provides exceptional symmetry (better than ±0.1 dB, 0.2 dB peak-to-null) to meet or exceed CTIA criteria for ripple test antennas. Each 3126 Series sleeve dipole antenna is designed with a VSWR less than 1.25:1 at the center frequency. Gain values and ±0.1 dB symmetry certification are provided for a 200 MHz to 300 MHz band (depending on the specific model) centered about the labeled frequency. The dipoles have a typical VSWR <3:1 across this entire band, and may be used for precision range calibrations across the entire band provided appropriate padding (~10 dB) is used to minimize possible standing wave effects on cables. The dipoles have nominal impedance of 50 Ω, a maximum continuous transmit power of one watt, and are equipped with a female SMA connector.

The higher frequency antennas include a radome, and are characterized with the radome in place. The radome provides improved dielectric properties for superior high frequency performance. Do not remove the radome for any reason. The dipoles are calibrated using an A2LA accredited process with a typical measurement uncertainty on the order of ±0.2 dB. During the calibration process, the dipoles are also certified to meet the ±0.1 dB symmetry required for use in the ripple test specified in the CTIA Over-The-Air Performance Test Plan. Gain, VSWR, maximum ripple, and measurement uncertainty values are provided with each calibration. See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking information. 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. Only qualified personnel should operate (or service) this equipment.
If you have any questions concerning maintenance, contact ETS-Lindgren Technical Support. Warranty may be voided if housing is opened.

Standard Configuration

• 3126 Series Sleeve Dipole Antenna
• A2LA accredited precision calibration and symmetry certification including signed Certificate of Calibration

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

Optional Items
Contact ETS-Lindgren Sales for information on ordering optional items.

CTIA Ripple Test Mounting Kit
This optional ripple test mounting kit is available to attach the dipole to an ETS Lindgren Multi Axis Positioning System (MAPS™). The mounting kit provides the adapters necessary to position dipole and loop antennas at each offset geometry required to perform the ripple test, as specified in the CTIA test plan. The center position mount can also be used for performing range calibrations (CTIA Substitution Part) and is the same mount design used for calibrating the antenna, thereby reducing measurement uncertainty.

3127 Resonant Loop Antenna
Magnetic dipole antennas designed to meet the CTIA +\-0.1 dB symmetry requirement for ripple test measurements at the labeled center frequency.

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. All 3126 Series sleeve dipole antennas are not listed in this manual; contact ETS-Lindgren Sales for a list of available 3126 Series sleeve dipole antennas.

MAINTENANCE

Cleaning
Maintenance of the 3126 Series sleeve dipole antenna is limited to external components such as cables or connectors. If the 3126 requires cleaning, use a clean soft cloth moistened with water. Do not use any harsh or abrasive chemicals; they may damage the components.

Service Procedures

Contacting ETS-Lindgren
Please see 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.

CAUTION
3126 Series sleeve dipole antennas are precision measurement devices. Handle your antenna with care.

CAUTION
Before performing any maintenance, follow the safety information in the ETS Lindgren Product Information Bulletin included with your shipment. Only qualified personnel should operate (or service) this equipment. If you have any questions concerning maintenance, contact ETS-Lindgren Technical Support. Warranty may be voided if housing is opened.

SPECIFICATIONS

Performance Specifications

Band| % Band 1.2:1 VSWR| % Band 2:1 VSWR| Calibration Range (MHz)

Centered at f 0 (dB)

| Min. Gain at f 0 (dB)| Pass/Fail Criteria
---|---|---|---|---|---
400—600 MHz| 1.5%| 10%| 200 MHz*| 1.5| •   1.2:1 VSWR on a 1.5% band centered at f0

•   Symmetry <0.2 dB

•   Meet minimum gain at f0

600—836 MHz| 2%| 15%| 200 MHz| 1.5| •   1.2:1 VSWR on a 2% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

836—1000 MHz| 2.5%| 15%| 200 MHz| 1.5| •   1.2:1 VSWR on a 2.5% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

1000—1800 MHz| 3%| 15%| 300 MHz| 1.5| •   1.2:1 VSWR on a 3% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

1800—1920 MHz| 3%| 15%| 300 MHz| 1.5| •   1.2:1 VSWR on a 3% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

1920—2150 MHz| 4%| 15%| 20% of band| 1.5| •   1.2:1 VSWR on a 4% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

2150—2840 MHz| 4%| 15%| 20% of band| 1.5| •   1.2:1 VSWR on a 4% band centered at f0

•   Symmetry <0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

2840—4500 MHz| 2%| 10%| 500 MHz| 1.4| •   1.2:1 VSWR on a 2% band centered at f0 • Symmetry

<0.2 dB for 2:1 VSWR band

•   Meet minimum gain at f0

4500—6000 MHz| 3%| 15%| 1000 MHz#| 1.0| •   1.25:1 VSWR at f0 (center frequency)

•   Symmetry <0.2 dB for 200 MHz band

•   Meet minimum gain at f0

The lower frequency of the calibration band cannot be less than 400 MHz. #The upper frequency of the calibration band cannot exceed 6000 MHz. All 3126 sleeve dipole antennas are not listed in this manual; contact ETS-Lindgren Sales for a list of available 3126 dipole antennas.

Electrical Specifications

Physical Specifications
All 3126 Series sleeve dipole antennas weigh approximately .23 kg (0.5 lbs) or less.

All 3126 Series s;eeve dipole antennas are not listed in this manual; contact ETS-Lindgren Sales for a list of available 3126 dipole antennas.

MOUNTING

The 3126 Series sleeve dipole antenna must be mounted to a support at the connector end of the antenna. An ETS-Lindgren mounting kit is recommended to support the antenna. Under no circumstances should any mounting structure extend inward more than 1.5 inches (38 mm) past the connector end of the antenna. This area approaches the radiating element of the antenna and any material in this region will significantly change the performance of the antenna and affect the accuracy of the measurement. The mounting structure should have a low dielectric and a minimum amount of mass in the region of the antenna.

When mounting to an ETS-Lindgren mounting kit:

• The antenna mount consists of a Teflon® sleeve with small clamp screws to hold the antenna in place.
• Fixed length spacers are then attached to the mounting sleeve to position it at each test position. For repeatable positioning, the antenna must be inserted into the sleeve until it bottoms out in the socket, then the clamp screws should be tightened symmetrically around the antenna to ensure that the axis of the antenna is along the axis of the mount.
• Note that an RF cable must be attached to the antenna prior to inserting it into the mounting socket.
• An optional blind mate socket and adaptor combination is available to allow attaching the cable to the Teflon socket adapter and sliding the antenna with blind mate connector adaptor into the RF socket.

Ferrite loaded RF cables are recommended for use with the 3126 to minimize the interaction with the dipole. ETS-Lindgren offers a line of ferrite loaded cables for this application. Lightweight RF cabling should be used and properly supported to avoid putting unnecessary load on the SMA connector of the antenna. Route cabling away from the antenna along the antenna axis for as far away as is practical to minimize the interaction of the cable with the antenna and to avoid distortion of the antenna pattern.

CAUTION
3126 Series sleeve dipole antennas are precision measurement devices. Handle your antenna with care. 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. Only qualified personnel should operate (or service) this equipment. If you have any questions concerning maintenance, contact ETS-Lindgren Technical Support. Warranty may be voided if housing is opened.

OPERATION

It is recommended that a 10 dB pad/attenuator be used at the input end of the 3126 Series sleeve dipole antenna to minimize standing waves on the transmit cable. This is especially important for frequencies where the input VSWR is greater than 1.2:1.
The electric field of the antenna is polarized parallel to the antenna axis. The specified antenna gain is realized along the plane perpendicular to the antenna axis and centered at the center of the dipole elements. The center of the dipole elements (bore sight location) is indicated by a line marked on the dipole, approximately 5.9 inches (15 cm) from the base (connector end) of the antenna housing.

CAUTION
Before placing into operation, follow the safety information in the ETS- Lindgren Product Information Bulletin included with your shipment.

CAUTION
3126 Series sleeve dipole antennas are precision measurement devices. Handle your antenna with care. Only qualified personnel should operate (or service) this equipment. If you have any questions concerning maintenance, contact ETS-Lindgren Technical Support. Warranty may be voided if housing is opened.

Product Manual
PN 399155 March, 2023 Rev E ets-lindgren.com

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