RF Field Strength Meter Circuit
RF Field Strength Meter Circuit
RF Field Strength Meter Circuit
RFFieldStrengthMeterCircuit
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RFFieldStrengthMeterCircuit
PostedbyP.MarianinMeasurewith3comments
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Asensitiveandreliablerffieldstrengthmeterisaninvaluableinstrumentinamateurradioandinradio
controlledmodelarea.Afieldstrengthmeterisusedtoalignanantennatogetthebestpossiblegain,to
determinethetransmittingrangeofradiocontrollers
Software Defined
Radio
Design The Future with Single
Chip. Get Your SoftwareDefined-Radio PDF
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RFFieldStrengthMeterCircuit
Designingtherffieldstrengthmetertobesensitiveitisarequirementbecausetheremustbeasmany
wavelengthsaspossiblebetweenthemeterandthetransmitter,themeasurementcanbedonewithoutusinga
strongercarriersignalandmostoftheradiocontrollersareoflowpowertype.
Consideringthesefactors,adualMOSFETisusedasanRFamplifierinthiscircuit.Theamplificationcanbe
adjustedbyP1andwithS1switchwecanselectthreefrequencyranges:
L1480kHzto2.4MHz
L22.4MHzto12MHz
L312MHzto40MHz
Theantennaismadeof30cmlongmetalrod.
Therffieldstrengthmetercircuitschematic
Activecomponents:3N140,3SK35,3SK37
Field strength
meter
RF & EMF Analyzer, Made in
Germany Show Frequency,
Power and Limits
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3Responsesto"RFFieldStrengthMeterCircuit"
1.
euripedesdesouzanevespp2bbdsays:onMay25,2012at5:11pm
reply
muitobom,bommesmo.
2.
euripedesdesouzanevespp2bbdsays:onMay25,2012at5:12pm
reply
fizedeutudocerto.
3.
rdevreedesays:onOctober22,2014at11:35pm
reply
Yearsdonemodelflyingandrfracingandneverseena.metre,idontseetheuseforit,butusefulltosee
theradiationbetweenyourgearandwhenusingtherealantirfplates,watchingtheresults,andnow
buildingaswitchforanemicircuitmeasurement.
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