Electronic Warfare Pocket Guide PDF
Preview Electronic Warfare Pocket Guide
Electronic Warfare Pocket Guide DavidL.Adamy Raleigh,NC scitechpub.com PublishedbySciTechPublishing,Inc. 911PaverstoneDrive,SuiteB Raleigh,NC27615 (919)847-2434,fax(919)847-2568 scitechpublishing.com Copyright©2011bySciTechPublishing,Raleigh,NC.Allrightsreserved. Nopartofthispublicationmaybereproduced,storedinaretrievalsystemor transmittedinanyformorbyanymeans,electronic,mechanical,photocopying, recording,scanningorotherwise,exceptaspermittedunderSections107or108of the1976UnitedStatedCopyrightAct,withouteitherthepriorwrittenpermissionof thePublisher,orauthorizationthroughpaymentoftheappropriateper-copyfeeto theCopyrightClearanceCenter,222RosewoodDrive,Danvers,MA01923,(978) 750-8400,fax(978)646-8600,oronthewebatcopyright.com.Requeststothe PublisherforpermissionshouldbeaddressedtothePublisher,SciTechPublishing, Inc.,911PaverstoneDrive,SuiteB,Raleigh,NC27615,(919)847-2434,fax(919) 847-2568,[email protected]. Thepublisherandtheauthormakenorepresentationsorwarrantieswithrespectto theaccuracyorcompletenessofthecontentsofthisworkandspecificallydisclaimall warranties,includingwithoutlimitationwarrantiesoffitnessforaparticularpurpose. Editor:DudleyR.Kay ProductionManager:RobertLawless Typesetting:MPSLimited,aMacmillanCompany CoverDesign:BrentBeckley Printer:Docusource Thisbookisavailableatspecialquantitydiscountstouseaspremiumsandsales promotions,orforuseincorporatetrainingprograms.Formoreinformationand quotes,pleasecontactthepublisher. PrintedintheUnitedStatesofAmerica 10987654321 ISBN:9781891121616 Contents EWDefinitions&Subareas 4 Frequency 5 Antennas 6 RadioPropagation 13 ReceiverSensitivity 20 CommunicationJamming 24 CommunicationsElectronicProtection 26 JammingLPICommunications 27 RadarCharacteristics 28 RadarJamming 29 RadarElectronicProtection 31 ExpendableCountermeasures 32 Decoys 33 Decibels(dB) 34 Graph&NomographInstructions 35 ListofSymbolsinFormulas 37 ListofAbbreviations 38 3 4 ElectronicWarfarePocketGuide EWDefinitions EWistheartandscienceofdenyinganenemythe benefitsoftheelectromagneticspectrumwhilepre- servingthemforfriendlyforces. EWSubareas ES ReceivinghostilesignalstosupportEA EA Actionstointerferewithenemyradarorcomm EP Featuresofradarsorcommunicationsystemsthat reducetheeffectivenessofenemyEW EW ES EA EP RWRs Comm Jamming Radar ECCM ESM Systems Radar Jamming LPI Comm Data Intercept IR Jamming Comm ES EO Jamming ARMs HEWs Chaff Flares ElectronicWarfarePocketGuide 5 Frequency λ=c/F λ λinmeters c=3×108m/sec FinHz C IEEE Commercial EW Bands Bands Bands Frequency (MHz)10631000063kkkkkk ESHHFF MKKMXCKSuaW MGHKEFLJI ....00010133Wavelength (meter) L D 1k UHF .3 600 UHF C 300 B 1 A 100 VHF VHF 3 60 30 10 10 HF HF 30 6 3 100 MF 1 300 6 ElectronicWarfarePocketGuide Antennas Polarizationloss 0 dB RHC RHC Polarizationlossisin ∼25 dB additiontoantennagain 3 dB LHC Nolossformatched 0 dB polarization V V 3 dB Lossof3dBfromany 45 deg 25 dB linearpolarizationtoany circularpolarization H Gainofnon-symetrical55%efficientParabolicDish 29,000 Gain(notindB)= θ ×θ 1 2 Gainofnon-symetrical60%efficientHornAntenna 31,000 Gain(notindB)= θ ×θ 1 2 θ1&θ2areorthogonal3dBbeamwidthsindegrees. ElectronicWarfarePocketGuide 7 Peakgainvs.3dBbeamwidthfor55%eff.dish 70 y) 60 c n e ci 50 Effi % 40 5 5 B (for 30 n d 20 n i Gai 10 0 .1 .2 .4 .6.81 2 4 6 810 20 40 60 100 3 dB Beamwidth In Degrees Antennaefficiency Thisisapproximatelythe%oftotalinput/output powerto/fromanantennawhichistransmitted/received withinthe3dBbeamwidth 10%frequencyrangedishcanhave55% 2−18GHzdishefficiencyis∼30% 8 ElectronicWarfarePocketGuide AntennaType Pattern TypicalSpecifications Dipole Polarization:Alignedwith El elementorientation Beamwidth:80◦×360◦ Gain:2dB Az Bandwidth:10% FrequencyRange: zerothroughµw Whip El Polarization:Vertical Beamwidth:45◦×360◦ Gain:0dB Az Bandwidth:10% FrequencyRange: HFthroughUHF Loop El PBoelaamriwzaitdiothn::8H0o◦r×izo3n6t0a◦l Gain:−2dB Bandwidth:10% Az FrequencyRange: HFthroughUHF NMoordmeal El PBoelaamriwzaitdiothn::4H5o◦r×izo3n6t0a◦l Helix Gain:0dB Az Bandwidth:10% FrequencyRange: HFthroughUHF ElectronicWarfarePocketGuide 9 AntennaType Pattern TypicalSpecifications Axial Mode Helix Az & El Polarization:Circular Beamwidth:50◦×50◦ Gain:10dB Bandwidth:70% FrequencyRange: UHFthroughlowµw Biconical El Polarization:Vertical Beamwidth:20◦to 100◦×360◦ Az Gain:0to4dB Bandwidth:4to1 FrequencyRange: UHFthroughmmw Lindenblad El Polarization:Circular Beamwidth:80◦×360◦ Gain:−1dB Az Bandwidth:2to1 FrequencyRange: UHFthroughµw Swastika El Polarization:Horizontal Beamwidth:80◦×360◦ Gain:−1dB Az Bandwidth:2to1 FrequencyRange: UHFthroughµw 10 ElectronicWarfarePocketGuide AntennaType Pattern TypicalSpecifications Yagi El Polarization:Horizontal Beamwidth:90◦×50◦ Gain:5to15dB Bandwidth:5% Az FrequencyRange: VHFthroughUHF Log Periodic El Polarization: VerticalorHorizontal Beamwidth:80◦×60◦ Gain:6to8dB Az Bandwidth:10to1 FrequencyRange: HFthroughµw Cavity El & Az Polarization:R&L Backed Circular Spiral Beamwidth:60◦×60◦ Gain:−15dB(minfreq) +3dB(maxfreq) Bandwidth:9to1 FrequencyRange:µw Conical El & Az Polarization:Circular Spiral Beamwidth:60◦×60◦ Gain:5to8dB Bandwidth:4to1 FrequencyRange: UHFthroughµw
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