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hfcompactverticalstealth

DDRR

Compact directional discontinuity ring radiator

Source: Rothammel, Vol. 1, Ch. 19.6, p. 391
Input Parameters
MHz
m
Results
Ring Diameter
1.687m
Ring Circumference (≈λ/4)
5.300m
Gap Width
16.9mm
Tuning Capacitor (approx)
59205.5pF
Feed Impedance (approx)
6.2Ω
Diagram
59206 pF50 ΩC = 5.30 m
Radiation Pattern
-3 dB-10 dB-20 dB0 dB0°90°180°270°Max: 0.0 dBi