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Summary of Contents for ESCO Technologies ETS-Lindgren 3147
- Page 1 Model 3147 Log Periodic Dipole Antenna User Manual...
- Page 2 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.
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Page 3: Table Of Contents
Table of Contents Notes, Cautions, and Warnings ..........v 1.0 Introduction ................7 Regarding Calibration of Log Periodic Dipole Antennas ........ 8 ETS-Lindgren Product Information Bulletin ........... 8 2.0 Maintenance ............... 11 Maintenance Recommendations ..............11 ... - Page 4 400 MHz ...................... 41 500 MHz ...................... 41 600 MHz ...................... 42 700 MHz ...................... 42 800 MHz ...................... 43 900 MHz ...................... 43 1.0 GHz ......................44 1.5 GHz ......................44 ...
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Page 5: Notes, Cautions, And Warnings
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. - Page 6 This page intentionally left blank.
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Page 7: Introduction
1.0 Introduction The ETS-Lindgren Model 3147 Log Periodic Dipole Antenna is a linearly-polarized broadband antenna designed to operate over the frequency range of 200 MHz to 5 GHz. The antenna was designed with the latest revision to Part 15 of FCC Rules and Regulations in mind. -
Page 8: Regarding Calibration Of Log Periodic Dipole Antennas
Because the radome is almost RF-invisible, it has very little effect on the performance of the Model 3147 (see VSWR on page 24). The base of the Model 3147 accepts an ETS-Lindgren or other tripod mount with 1/4–20 threads. Additionally, the antenna is shipped with a support rod. A variety of mounting options are available for the Model 3147. - Page 9 Introduction...
- Page 10 This page intentionally left blank. Introduction...
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Page 11: Maintenance
2.0 Maintenance Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Maintenance of the Model 3147 Log Periodic Dipole Antenna is limited to external components such as cables or connectors. If you have any questions concerning maintenance, contact ETS-Lindgren Customer Service. - Page 12 This page intentionally left blank. Maintenance...
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Page 13: Specifications
3.0 Specifications Electrical Specifications Frequency Range: 200 MHz–5 GHz VSWR: Average: 1.25:1 Maximum: 1.7:1 Impedance: 50 Ω Maximum Continuous 80 W at 1 GHz Input Power: 40 W at 5 GHz Maximum Peak Input Power: 100 W at 1 GHz 50 W at 5 GHz Connector: Precision N female... - Page 14 This page intentionally left blank. Specifications...
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Page 15: Mounting Instructions
4.0 Mounting Instructions Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. The Model 3147 is a precision measurement device. Handle with care. Using Included Mounting Adapters The Model 3147 Log Periodic Dipole Antenna ships with these mounting adapters: ... - Page 16 To attach the included adapters to the Model 3147: If required, insert the 1/4–20 thread insert into the polarizing adapter. Remove the mounting knob from the mounting bracket on the antenna. Slide the polarizing adapter into the mounting bracket by placing the polarizing adapter placed between the shoulders of the mounting bracket.
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Page 17: Additional Mounting Options
Thread the mounting knob through the mounting bracket, then through the polarizing adapter, and finally through the hex nut. Do not cross thread or permanent damage to the adapter could occur. Tighten the mounting knob to secure the antenna. Attach the polarizing adapter and antenna to tripod or tower, as required. -
Page 18: 7-Tr And Mast Mounting Options
7-TR OUNTING PTIONS Following are options for mounting the Model 3147 onto an ETS-Lindgren 7-TR Tripod or mast. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware. Mast refers to 2070 Series, 2075, and 2175 Antenna Towers. 7-TR refers to 109042, 108983, and 108507 booms: ... -
Page 19: 2X2 Boom Mounting Options
OUNTING PTIONS Following are additional options for mounting the Model 3147 onto a 2x2 boom. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware. 2x2 boom refers to a typical 2-inch by 2-inch boom. Mounting Instructions... - Page 20 This page intentionally left blank. Mounting Instructions...
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Page 21: Operation
5.0 Operation Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Model 3147 Assembly Instructions A variety of mounting options are available for the Model 3147. For information, see Mounting Instructions on page 15. To attach the support rod to the base of the Model 3147 Log Periodic Dipole Antenna: Remove the clamping screw from the mount on the antenna. - Page 22 This page intentionally left blank. Operation...
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Page 23: Typical Data
6.0 Typical Data Following are typical measurements for the Model 3147 Log Periodic Dipole Antenna. Typical Data... -
Page 24: Typical Vswr For Model 3147
Typical VSWR for Model 3147 This is a plot of the VSWR showing the antenna with and without a radome. The effect of the radome on the electromagnetic performance of the antenna is minimal. Typical Data... -
Page 25: Typical Antenna Factor And Gain For Model 3147
Typical Antenna Factor and Gain for Model 3147 Typical Data... - Page 26 Typical Data...
- Page 27 The antenna factor of the Model 3147 (triangles) measured at the distance of three meters as per ANSI C63.5. The standard states that the spacing R between log-periodic array antennas is measured from the projection onto the ground plane of the midpoint of the longitudinal axis of each antenna. This midpoint has been marked on the radome and labeled Reference Point Per ANSI C63.5.
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Page 28: Beamwidth For Horizontally And Vertically Polarized Model 3147
Beamwidth for Horizontally and Vertically Polarized Model 3147 The beamwidth charts show the 3-dB and 10-dB power beamwidth as determined from the antenna patterns taken for both horizontal and vertical polarizations. Typical Data... - Page 29 Typical Data...
- Page 30 Typical Data...
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Page 31: Front-To-Back Ratio For Model 3147
Front-to-Back Ratio for Model 3147 The front-to-back ratio is representative of how well the antenna propagates energy in the end fire direction. The measurement is made by first positioning two identical Model 3147 antennas face-to-face at a 2-meter height and a 3-meter distance. A signal is transmitted through one antenna and received with the other. - Page 32 Typical Data...
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Page 33: Cable Attenuation (Db) At 20°C For 6-M Cable
Cable Attenuation (dB) at 20°C for 6-M Cable Typical Data... -
Page 34: Typical Antenna Pattern For 200 Mhz And 300 Mhz
Typical Antenna Pattern for 200 MHz and 300 MHz This shows a sample antenna pattern taken at selected frequencies of 200 MHz and 300 MHz. Additional antenna patterns are located in Appendix A on page 41. These patterns were measured indoors using a separation distance of 1 meter to 1.5 meters between the transmit antenna and the receive antenna. -
Page 35: Radiated Emissions Measurement
7.0 Radiated Emissions Measurement Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Ambient field strength values are measured as follows: Install the antenna where measured field strength values are desired. Select the desired orientation of the antenna, both boresite direction and polarization. -
Page 36: Conversion Factors
If a long coaxial cable is used between the antenna and the receiving device, or the frequency of the observation is more than several tens of MHz, the losses in the coaxial cable, A e , must be included in the computation. In this case the computation is: RF Voltage, dB(µV) + Cable Loss, dB + Antenna Factor, dB (m Field Strength dB (µV/m) - Page 37 In a 50-Ω system, the above equation becomes: 10 log P = 20 log V – 10 log (50) Converting from dB to dBm for power and from dB(V) to dB(µV) for voltage, the added constant becomes: 30 – 120 – 10 log (50) = –107 The constant in the second equation is obtained by considering the pointing vector which relates the power density in (W/m...
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Page 39: Power Requirements
8.0 Power Requirements The Model 3147 Log Periodic Dipole Antenna may also be used as a transmitting antenna. Please note the maximum power specification in the specification table on page 13. The power needed to generate a given field strength in free space can be estimated according to the transmission equation: (field strength) (distance in meters) - Page 40 This page intentionally left blank. Power Requirements...
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Page 41: Appendix A: Typical Antenna Patterns
Appendix A: Typical Antenna Patterns 400 MH 500 MH Typical Antenna Patterns... -
Page 42: 600 Mhz
600 MH 700 MH Typical Antenna Patterns... -
Page 43: 800 Mhz
800 MH 900 MH Typical Antenna Patterns... -
Page 44: Ghz
1.0 GH 1.5 GH Typical Antenna Patterns... -
Page 45: Ghz
2.0 GH 2.5 GH Typical Antenna Patterns... -
Page 46: Ghz
3.0 GH 3.5 GH Typical Antenna Patterns... -
Page 47: Ghz
4.0 GH 4.5 GH Typical Antenna Patterns... -
Page 48: Ghz
5.0 GH Typical Antenna Patterns... -
Page 49: Appendix B: Warranty
Appendix B: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3147 Log Periodic Dipole Antenna. 3147 URATION OF ARRANTIES FOR ODEL All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
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