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vhfuhfverticalomnidirectionalportable

Slim Jim

Compact VHF/UHF vertical antenna

Source: Rothammel, Vol. 2, Ch. 25.1.2, p. 105
Input Parameters
MHz
Results
Total Length
1986mm
Radiator Section (3λ/4)
1474mm
Matching Stub (λ/4)
491mm
Feed Tap from Bottom
25mm
Gap
21mm
Gain
3.0dBi
Diagram
50 Ωgap 0 mm1986.00 m0.00 mλ/2λ/4
Radiation Pattern
-3 dB-10 dB-20 dB0 dB0°90°180°270°Max: 0.0 dBi