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Introduction

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Model 3159C

High-Power

Biconical Antenna

User Manual

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Содержание 3159C

Страница 1: ...Introduction 1 Model 3159C High Power Biconical Antenna User Manual ...

Страница 2: ...2 Introduction ...

Страница 3: ...hers All trademarks are the property of their respective owners Copyright 2005 2020 by 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 trademark of ETS Lindgren Inc Revision Record MANUAL 3159C HIGH POWER BI CONICAL ANT Part 399775 Rev E Revision Des...

Страница 4: ...9 Physical Specifications 9 Model 3159C Antenna 9 Model 3159C Pedestal 9 Ferrite Floor 10 4 0 Mounting Instructions 11 Mounting the Balun and Polarization Unit 11 Mounting the Biconical Elements 12 Adjusting the Tube Extensions 12 Removing the Connector 13 5 0 Operation 14 Model 3159C Pedestal 14 Electrical Field Distribution 14 Performance 15 Typical Calibration Data 19 Typical Antenna Factor at ...

Страница 5: ...nstructions 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 See the ETS Lindgren Product Information Bulletin for safety regulatory and other product marking information ...

Страница 6: ...ensures high field strength at frequencies as low as 20 MHz The design of the Model 3159C takes advantage of the wide beamwidth feature of a biconical antenna In addition the optimized design provides low VSWR and high radiation efficiency The 3159 was developed to support high field strength immunity measurements in anechoic chambers of varying sizes Versions of this antenna have been used in var...

Страница 7: ...extensions The additional 0 5m extensions can help reduce the VSWR and improve the gain of the antenna at the low frequency end of is operation but can increase the VSWR at other frequencies depending on the chamber layout and proximity to other structures The lower VSWR increases the forward power that can be delivered to the antenna which could improve the measured field strength The extensions ...

Страница 8: ...any seal or bearing store or from ETS Lindgren Annual Calibration See the Product Information Bulletin included with your shipment for information on ETS Lindgren calibration services Replacement Parts 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 Follow...

Страница 9: ...NA Length 5 4 m 17 7 ft Length without extension 3 6 m 11 8 ft Length with one extension 4 5 m 14 8 ft Length with both extensions 5 4 m 17 7 ft Diameter 2 4 m 7 9 ft Weight without extensions 12 7 kg 28 lbs Weight with one extension 14 06 kg 31 lbs Weight with both extensions 15 42 kg 34 lbs MODEL 3159C PEDESTAL Length 4 47 m 14 7 ft Width 160 cm 63 in Total height with antenna 6 52 m 21 42 ft We...

Страница 10: ...10 Specifications FERRITE FLOOR Length 130 cm 51 18 in Width 150 01 cm 59 06 in Individual tiles 100 mm x 100 mm x 6 7 mm 3 94 in x 3 94 in x 0 26 in Weight 113 40 kg 250 lbs ...

Страница 11: ...els to pedestal and fasten with stud and nuts to mounting plates at desired mounting height Use included phenolic bolts and nuts and tighten to 8ft lbs 10 8Nm torque 2 Align mounting holes on Polarization unit with top slotted holes on top slotted holes 3 Align balun to mounting channels and insert through bolts from behind balun rear plate secure with lock washer and hex nut Insert spacer between...

Страница 12: ...input RF coaxial cable to the connector on the rear face of the balun Adjusting the Tube Extensions Each side has six 6 main tubes each with two 2 0 5m long screw on extensions 1 To add and adjust the extensions screw them onto the elements 2 To remove the extensions unscrew them from the elements 3 Extensions must be added to both elements so that the antenna remains symmetrical As an added preca...

Страница 13: ...ach with two 2 0 5m long screw on extensions 1 Remove the four 4 mounting bolts on the flange 2 Pull the connector firmly out of the brass yoke 3 Plug the connector into the yoke and replace the mounting hardware hex bolt 930732 and lock washer 930037 Mounting Bolts Plug connector ...

Страница 14: ...polarization or movement of the boresight feature The Model 3159C pedestal has one air cylinder that controls the polarization movement of the antenna The switch on the back of the pedestal toggles air control Boresight adjustment is accomplished manually by loosening the four mounting screws so that the polarization unit can be tilted Electrical Field Distribution The Model 3159C may be used for ...

Страница 15: ...lun is manufactured and measured separately as a preliminary performance test with a 200 Ohm resistor placed across the output of the balun in place of the elements The VSWR plot shown in Figure 2 is an example of such a measurement of a version C balun takenduring factory calibration Following successful completion of the balun assembly the VSWR measurement was repeated on an OATS with the antenn...

Страница 16: ... fairly standard sized full vehicle 10 m EMC chamber In the Figure 6 installation the antenna is positioned at a height of 2 m and at a distance of 2 m from the field probe above a reflective ground plane As can be seen from the measurements the trends in the measured VSWR changes with installation conditions since most test installations will be different from an ideal far field setup it is expec...

Страница 17: ...Operation 17 1 5m height 1m distance Figure 5 Measured VSWR in 10m EMC chamber at 1 5m height above ferrite tiles Figure 6 Measured VSWR in a very large SAC at 2 3m and 3 3m height above ferrite ...

Страница 18: ...18 Operation Figure 7 Measured Ē field in a small EMC chamber with and without ferrite on floor Figure 8 Measured Ē field in small EMC chamber at 2 3m height above ferrite tiles ...

Страница 19: ...complete The following equation was used to determine the power required to generate the desired field strength at a given distance when antenna factors are known 𝑃 𝑑𝐵 𝑊 20 log 10 E desired V m 20 log 10 𝑑𝑚 20 log 10 𝑓𝑀𝐻𝑧 𝐴𝐹 𝑑𝐵 𝑚 1 15 With this equation you can calculate the forward power needed to generate 100 V m at a given distance Following is the performance for the Model 3159C at 3 5m ...

Страница 20: ...20 Operation BALUN VSWR VSWR taken August 2017 ...

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