ITU R BS 705:1995
ITU R BS 705:1995 Hf Transmitting And Receiving Antennas Characteristics And Diagrams
Table of Contents
ANNEX1...HFtransmittingantennasPART1TOANNEX1...HFtransmittingantennacharacteristics
anddiagrams
1Introduction
2Geometricalrepresentationofantennaradiationpatterns
2.1Graphicalrepresentation
3Radiationpatternsandgaincalculation
3.1Generalconsiderations
3.2Radiationpatterns
3.3Directivityandgain
3.4Effectoftheground
4Arraysofhorizontaldipoles
4.1Generalconsiderations
4.2Designationofarraysofhorizontaldipoles
4.3Slewing
4.4Arraysofhorizontaldipolesarrangedvertically
4.5Arraysofhorizontaldipolesarrangedhorizontally
(tropicalantennas)
4.6Omnidirectionalarraysofhorizontaldipoles
4.7Calculationofthepatternsofhorizontaldipolearrays
5Log-periodicantennas
5.1Generalconsiderations
5.2Designationoflog-periodicantennas
5.3Calculationofthepatternsforhorizontallog-periodic
antennas
5.4Calculationofthepatternsforverticallog-periodic
antennas
6Rhombicantennas
6.1Generalconsiderations
6.2Designationofrhombicantennas
6.3Calculationofthepatternsforrhombicantenna
7Verticalmonopoles
7.1Generalconsiderations
7.2Designationofverticalmonopoles
7.3Verticalmonopolewithoutanearthsystem
7.4Verticalmonopolewithanearthsystem
8Patternexamples
PART2TOANNEX1...PracticalaspectsofHFtransmitting
antennas
1Introduction
2Measurementsofantennaradiationpatterns
2.1Methodofmeasurement
2.2Considerationswhenusingahelicopterforthe
measurements
2.3Measuringequipment
2.4Measurementprocedures
2.5Processingthemeasureddata
3Comparisonoftheoreticalandmeasuredradiationpatterns
3.1Comparisonoftheoreticalandmeasuredfront-to-back
ratios
4Influenceofsurroundingenvironmentonradiationpatterns
4.1Groundtopography
4.2Groundconductivity
4.3Othersitestructures
5Variationsinpracticalantennaperformance
5.1Azimuthalpattern
5.2Slewedpattern
5.3Minimumpracticalradiationlevelforplanningpurposes
6Suitabilityandapplicationofantennas
6.1Horizontaldipoleantennas
6.2Rotatablecurtainantennas
6.3Rhombicantennas
6.4Fixedazimuthlog-periodicantennas
6.5Rotatablelog-periodicantennas
6.6Choiceofoptimumantenna
APPENDIX1TOANNEX1...Patternexamples
1Curtainantennas
1.1Curtainantennaswithoutreflector
1.2Curtainantennaswithtunedreflector
1.3Curtainantennaswithaperiodicscreenreflector
2Tropicalantennas
3Log-periodicantennas
4Quadrantantennas
5Crosseddipoleantennas
6Rhombicantennas
7Verticalmonopoles
ANNEX2...HFreceivingantennas
PART1TOANNEX2...HFreferencereceivingantennas
characteristicsanddiagrams
1Introduction
2Referencereceivingantennacharacteristicstobeused
forplanningpurposes
2.1Relativeverticalpatternperformance
2.2Relativehorizontalpatternperformance
PART2TOANNEX2...Receivingantennaperformanceinurban
environment
1Influenceofsurroundingenvironmentonradiationpattern
2Attenuationfactorsassociatedwiththereceivingantenna
inanurbanenvironment
2.1Relativeantennaperformanceintheurbanenvironment