---- Log_Spiral_f_lo_17.900.ant ---- Oct 18, 2020 07:04:07
Spiral Antenna, Iteration f_lo = 17.9
 Sommerfeld-Norton Ground
Zone 1: Conduct=5 mS; Dielec=13
Nr Segments: 261
 
Freq: 21 MHz
Wire/Structure Loss: 0.85% 
Source  Zr/Zi: 1734.5, -j871.3 ohms
 SWR:  2.54:1
Maxgain: 8.2 dBi at 0 Azim
         8.2 dBi at 18.1 Elev
F/R: 4.1 dB dB (F/B: 0 dB ;0 dB at 162 El)
Total Loss: 0.04 dB (Efficiency: 99.2%)

