Ets-lindgren 3147 Log Periodic Dipole Array Antenna User Manual

Model 3147 Log Periodic Dipole Antenna User Manual

This page intentionally left blank. 10 | Introduction

2.0 Maintenance Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with yo

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3.0 Specifications Electrical Specifications Frequency Range: 200 MHz–5 GHz VSWR: Average: 1.25:1 Maximum: 1.7:1 Impedance: 50 Ω Maximum Continuo

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4.0 Mounting Instructions Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin include

To attach the included adapters to the Model 3147: 1. If required, insert the 1/4–20 thread insert into the polarizing adapter. 2. Remove the mou

4. Thread the mounting knob through the mounting bracket, then through the polarizing adapter, and finally through the hex nut. Do not cross thread

7-TR AND MAST MOUNTING OPTIONS Following are options for mounting the Model 3147 onto an ETS-Lindgren 7-TR Tripod or mast. Contact the ETS-Lindgren S

2X2 BOOM MOUNTING OPTIONS Following are additional options for mounting the Model 3147 onto a 2x2 boom. Contact the ETS-Lindgren Sales Department for

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. No

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5.0 Operation Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your

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6.0 Typical Data Following are typical measurements for the Model 3147 Log Periodic Dipole Antenna. Typical VSWR for Model 3147 This is a plot of

Typical Antenna Factor and Gain for Model 3147 24 | Typical Data

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 b

Beamwidth for Horizontally and Vertically Polarized Model 3147 The beamwidth charts show the 3-dB and 10-dB power beamwidth as determined from the a

Typical Data | 27

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. Th

Cable Attenuation (dB) at 20°C for 6-M Cable Typical Data | 29

Table of Contents Notes, Cautions, and Warnings ... v1.0 Introduction ...

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. Addition

7.0 Radiated Emissions Measurement Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulleti

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, t

In a 50-Ω system, the above equation becomes: 10 log10P = 20 log10 V – 10 log10(50) Converting from dB to dBm for power and from dB(V) to dB(µV) for

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8.0 Power Requirements The Model 3147 Log Periodic Dipole Antenna may also be used as a transmitting antenna. The power input requirements for a de

Power Requirements Table Power requirements for a given field strength computed using typical antenna calibration factors at 3-meter spacing. 80 WATT

Field Strength (E) Freq (MHz) AF Gain (dB) Gain (num) 1 V/m 10 V/m 20 V/m 625 19.6 6.5 4.5 0.067 6.7 26.9 650 20.2 6.3 4.3 0.070 7.0 28.1 675 2

40 WATTS CONTINUOUS POWER Field Strength (E) Freq (MHz) AF Gain (dB) Gain (num) 1 V/m 10 V/m 20 V/m 1000 23.2 7.0 5.0 0.060 6.0 23.9 1100 23.4 7.6

Field Strength (E) Freq (MHz) AF Gain (dB) Gain (num) 1 V/m 10 V/m 20 V/m 3000 34.0 5.8 3.8 0.079 7.9 31.6 3100 35.1 5.0 3.2 0.095 9.5 37.9 3200 3

80 Watts Continuous Power ... 3640 Watts Continuous Power ...

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Appendix A: Typical Antenna Patterns 400 MHZ 500 MHZ Typical Antenna Patterns | 41

600 MHZ 700 MHZ 42 | Typical Antenna Patterns

800 MHZ 900 MHZ Typical Antenna Patterns | 43

1.0 GHZ 1.5 GHZ 44 | Typical Antenna Patterns

2.0 GHZ 2.5 GHZ Typical Antenna Patterns | 45

3.0 GHZ 3.5 GHZ 46 | Typical Antenna Patterns

4.0 GHZ 4.5 GHZ Typical Antenna Patterns | 47

5.0 GHZ 48 | Typical Antenna Patterns

Warranty | 49 Appendix B: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for yo

Notes, Cautions, and Warnings Note: Denotes helpful information intended to provide tips for better use of the product. Caution: Denotes a hazard. F

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1.0 Introduction The ETS-Lindgren Model 3147 Log Periodic Dipole Antenna is a linearly-polarized broadband antenna designed to operate over the fre

Because the radome is almost RF-invisible, it has very little effect on the performance of the Model 3147 (see VSWR on page 23). The base of the Mode

ETS-Lindgren Product Information Bulletin See the ETS-Lindgren Product Information Bulletin included with your shipment for the following: • Warranty