Model 3145BDP Dual-Polarized Log-Periodic Dipole Array User Manual
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 2007–2008 by ETS-Lindgren L.P. All Rights Reserved.
Table of Contents Notes, Cautions, and Warnings................................................ v 1.0 Introduction .......................................................................... 7 Model 3145BDP Optional Items ....................................................................7 ETS-Lindgren Product Information Bulletin ...................................................9 2.0 Maintenance ....................................................................... 11 Annual Calibration ..............
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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.
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1.0 Introduction The ETS-Lindgren Model 3145BDP Dual-Polarized Log-Periodic Dipole Array is a dual linearly polarized, broadband antenna designed to operate over the frequency range of 100 MHz to 1.1 GHz. The precise design of the feed and positioning of the elements on the boom yields optimum phase relationship. This causes the active region, at any given frequency, to propagate RF energy towards the smaller elements, leaving the elements behind it electrically dead.
The 109620 pedestal is a wheeled positioning system that provides tilt adjustment and horizontal and vertical polarization. A pneumatic cylinder is used to change polarization, and can be controlled remotely using an optional ETS-Lindgren Model 2090 Multi-Device Controller (or next generation ETS-Lindgren controller, if applicable). For information on ordering optional items, contact ETS-Lindgren.
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 Introduction | 9
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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 3145BDP is limited to external components such as cables or connectors. If you have any questions concerning maintenance, contact ETS-Lindgren Customer Service. Annual Calibration See the Product Information Bulletin included with your shipment for information on ETS-Lindgren calibration services.
Part Description Part Number Element, 2.89 L, 1/4 OD x .065 WT, SS 111763-8 Element, 3.32 L, 1/4 OD x .065 WT, SS 111763-9 Element, 3.81 L, 1/4 OD x .065 WT, SS 111763-10 Element, 4.38 L, 1/4 OD x .065 WT, SS 111763-11 Element, 5.02 L, 1/4 OD x .065 WT, SS 111763-12 Element, 5.75 L, 1/4 OD x .065 WT, SS 111763-13 Element, 6.57 L, 1/4 OD x .065 WT, SS 111763-14 Element, 7.51 L, 1/4 OD x .065 WT, SS 111763-15 Element, 8.58 L, 1/4 OD x .065 WT, SS 111763-16 Element, 9.80 L, 1/4 OD x .
3.0 Specifications Electrical Specifications Frequency Range: 100 MHz – 1.1 GHz Input Impedance: 50 Ω VSWR: • Average – 1.5:1 • Maximum – 3.5:1 * * At the extremes of the operational band. CW Power: 1000 W Connectors: Type N female (2) Physical Specifications Antenna Height: 1325.6 mm 52.19 in Width: 1621.8 mm 63.85 in Weight: 40.144 lb 18.2 kg Base Dimensions: 254.0 mm x 254.0 mm 10.0 in x 10.
| Specifications
Specifications | 15
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4.0 Practical Application Horizontal and vertical polarizations are easily accomplished with the Model 3145BDP. Due to the length of the low-frequency elements, users should verify element clearance prior to switching the antenna to vertical polarization. Contact with any metal or non-metallic structure can capacitively load the antenna which may cause inconsistent results. Make sure that no part of the dipole elements are in contact with the tower, particularly in vertically-polarized tests.
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5.0 Mounting the Model 3145BDP Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Model 3145BDP Base The base of the Model 3145BDP Dual-Polarized Log-Periodic Dipole Array features four mounting holes and two Type N connectors. The holes may be used to mount the antenna to the optional ETS-Lindgren 109620 Pedestal, or to a customer-defined mounting solution. For information on the 109620 pedestal, see page 7.
| Mounting the Model 3145BDP
Model 3145BDP Mounting Diagram Mounting the Model 3145BDP | 21
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6.
Model 3145BDP Gain 24 | Typical Data
Appendix A: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3145BDP. DURATION OF WARRANTIES FOR MODEL 3145BDP All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
