Model 3150B Dual-Stacked Log Periodic Dipole Array Antenna Assembly Manual
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.
Table of Contents Notes, Cautions, and Warnings ......................................................................... v 1.0 Introduction ................................................................................................... 7 Standard Configuration ....................................................................................................... 8 Optional 7-TR Tripod ..........................................................................................................
00 MHz—500 MHz ................................................................................................... 41 600 MHz—700 MHz ................................................................................................... 42 800 MHz—900 MHz ................................................................................................... 43 1000 MHz—2000 MHz ............................................................................................... 44 Appendix A: Warranty ................
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.
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1.0 Introduction The ETS-Lindgren Model 3150B Dual-Stacked Log Periodic Dipole Array (LPDA) Antenna is comprised of two separate 100 ohm LPDAs. The result is a 50 ohm input impedance array when assembled in parallel, providing increased gain when compared to a single LPDA. Also, the VSWR is low so that it provides excellent match with the amplifier, resulting in the generation of a high field per input power. The Model 3150B is ideal in situations where high fields need to be generated.
Standard Configuration The Model 3150B ships unassembled, and includes the following components to be assembled, plus the necessary fasteners. For assembly steps, see page 15. Feed Boom Assembly Boom Assemblies (4) The five longest elements (the last five elements from the bottom of each boom assembly) are removed for shipping. To attach the removable elements to the boom assembly, see page 16.
Optional 7-TR Tripod The Model 3150B mounts to an ETS-Lindgren 7-TR Tripod using a special cross boom (part# 118556). To order a 7-TR and cross boom, contact ETS-Lindgren Sales. The ETS-Lindgren 7-TR Tripod is 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.
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2.0 Maintenance Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. WARRANTY Maintenance of the Model 3150B is limited to external components such as cables or connectors. If you have any questions concerning maintenance, contact ETS-Lindgren Customer Service. If you have any questions concerning maintenance, contact ETS Lindgren Customer Service.
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3.0 Specifications Electrical Specifications Frequency Range: 80 MHz to 1 GHz VSWR (Average): 2:1 Maximum Continuous Power: 5 kW at 80 MHz, 2.5 kW at 1 GHz Peak Power: 7 kW at 80 MHz, 4 kW at 1 GHz Impedance (Nominal): 50 Ω Connector: 7/16 female Physical Specifications Height: 203.07 cm (79.95 in) Width: 209.07 cm (82.31 in) Depth: 150.44 cm (59.23 in) Weight: 10.56 kg (23.
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4.0 Assembly Instructions Before assembling or connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Take care when assembling the Model 3150B. Make sure the antenna is on a stable surface at all times. Assembly steps require assistance from one or more crewmembers. Components to Assemble The four boom assemblies are identical and interchangeable.
Attach the Removable Elements The five longest elements on each boom assembly (the last five from the bottom) are removed for shipping, and should be re-attached during assembly inside the chamber. The elements and the location on the boom assembly where they attach are marked with the numbers 1, 2, 3, 4, and 5. Do not cross thread the connection or permanent damage to the element or boom could occur. 1. Match the number 1 on the element with the number 1 on the boom.
Overview of Steps Before you begin, see page 16 to attach the removable elements to each boom assembly.
Attach Two Boom Assemblies to Center Support Bar Before you begin, see page 16 to attach the removable elements to each boom assembly.
Assembly Instructions | 19
Attach Feed Boom Assembly 20 | Assembly Instructions
Attach Remaining Two Boom Assemblies to Side Support Bars Assembly Instructions | 21
| Assembly Instructions
Assembly Instructions | 23
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5.0 Mounting onto a 7-TR Tripod The Model 3150B mounts to an ETS-Lindgren 7-TR Tripod using a special cross boom (part# 118556). Install the 118556 cross boom prior to mounting the Model 3150B onto the 7-TR.
| Mounting onto a 7-TR Tripod
Mounting onto a 7-TR Tripod | 27
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6.0 Disassembly Instructions Before disconnecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Place the Model 3150B on a stable surface before disassembling. As you remove parts, place them in a safe location. Store disassembled components in secure, protective location. Retain all fasteners. See the corresponding step in Assembly Instructions on page 15 for detailed information about how each component is attached.
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7.
Typical Average Power Requirements MEASURED POWER REQUIREMENTS 32 | Typical Data
HORIZONTAL POLARIZATION, 2-M DISTANCE Typical Data | 33
HORIZONTAL POLARIZATION, 3-M DISTANCE 34 | Typical Data
VERTICAL POLARIZATION, 2-M DISTANCE Typical Data | 35
VERTICAL POLARIZATION, 3-M DISTANCE 36 | Typical Data
Typical VSWR The typical VSWR for the Model 3150B is less than 2:1 from 80 MHz to 400 MHz. Above that frequency the average VSWR is 2:1.
Typical Half Power Beamwidth 38 | Typical Data
Typical Radiation Patterns 80 MHZ—100 MHZ Typical Data | 39
200 MHZ—300 MHZ 40 | Typical Data
400 MHZ—500 MHZ Typical Data | 41
600 MHZ—700 MHZ 42 | Typical Data
800 MHZ—900 MHZ Typical Data | 43
1000 MHZ—2000 MHZ 44 | Typical Data
Appendix A: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3150B. DURATION OF WARRANTIES FOR MODEL 3150B All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
