FCC Method of Moments - SBE Chapter 24

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Example MEDIUM WAVE ARRAY SYNTHESIS FROM FIELD RATIOS Frequency = 1180 KHz field ratio tower magnitude phase (deg) 1 1. 0 7 .894 109.2 VOLTAGES AND CURRENTS - rms source voltage current node magnitude phase (deg) magnitude phase (deg) 1 1,730.9 40.8 27.9853 5.2 61 419.553 128.1 26.2662 111.1 Sum of square of source currents = 2,948.56 Total power = 50,000. watts Normalize phase (111.1 – 5.2), Tower 7 Phase = +105.9° Ratio current (26.2662 / 27.9853), Tower 7 Ratio = 0.939
Example MEDIUM WAVE ARRAY SYNTHESIS FROM FIELD RATIOS field ratio tower magnitude phase (deg) 1 .438 -6.9 2 1. 0 3 .523 16.7 4 .418 64.9 5 .99 99.5 6 .549 122. VOLTAGES AND CURRENTS - rms source voltage current node magnitude phase (deg) magnitude phase (deg) 1 246.145 333.3 3.69944 .1 11 415.624 17.3 7.85442 5.5 21 184.362 23.4 4.18681 21.5 31 38.5047 339.6 3.44322 65.1 41 56.0734 45.7 8.02852 100. 51 13.2224 329.3 4.43341 121.8 Sum of square of source currents = 378.234 Total power = 5,000. watts
Page 1 and 2: FCC Method of Moments Licensing AM
Page 3 and 4: Classic AM “Proof” Construction
Page 5 and 6: Classic “AM “ Proof Pattern Sha
Page 7 and 8: Could This Cumbersome Process be Im
Page 9 and 10: “Method of Moments” Applicable
Page 11 and 12: “Method of Moments” In Plain En
Page 13 and 14: “Method of Moments” NEC Modeled
Page 15 and 16: “Method of Moments” NEC Modeled
Page 17 and 18: )cos cos (1 cos ) sin cos( ) ( G G
Page 19 and 20: NDA Base Impedance Determined by: -
Page 21 and 22: Back to “The Task” FCC Method o
Page 23 and 24: Example GEOMETRY Wire coordinates i
Page 25 and 26: Example IMPEDANCE normalization = 5
Page 27 and 28: Verifying the Model With Series Ind
Page 29 and 30: Example GEOMETRY Wire coordinates i
Page 31 and 32: Example Lumped loads resistance rea
Page 33 and 34: Verifying the Model Adjust Tower Im
Page 35 and 36: FCC Requirements - Tapered towers m
Page 37 and 38: Example Two turn lightning loops pl
Page 39 and 40: Modeling Pattern Shape Defined by F
Page 41: Modeling Credit to Jerry Westburg:
Page 45 and 46: Example C : \ D o c u m e n t s a n
Page 47 and 48: DA FCC “302” Location - from Su
Page 49 and 50: FCC Requirements Determining “Pro
Page 51 and 52: Sampling System The Sampling System
Page 53 and 54: Sample Lines Verifying Length and I
Page 55 and 56: Example Sample line measurements wi
Page 57 and 58: Toroid Verification Toroids R F Sou
Page 59 and 60: FCC Requirements - Sample line leng
Page 61 and 62: Maintenance At Least Once Every 24

FCC Method of Moments - SBE Chapter 24

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