ANTENTOP- 01- 2009, # 011

Small Sized Helical Antennas

By: I.Kapustin, UA0RW, Yakutsk, USSR

Small-Sized Helical Antenna- it is wire helix coiled on a dielectric rod. UA0RW used a wood rod boiled in the paraffin. Figure 1 shows the design of the Vertical Small Sized Helical Antenna. Antenna for the 20- meters has rod in OD 2- cm, length of winding is 30 cm, antenna is coiled turn to turn) by enamel wire in 1- mm OD (18- AWG).

Figure 1

A. Design of the Vertical Small Sized Helical Antenna

Credit Line: Radio #1, 1958, pp.:26-27

Figure 1

B. DD of the Vertical Small Sized Helical Antenna

Figure 2 shows the design of the Dipole Small Sized Helical Antenna. Antenna for the 20- meters has rod in OD 2- cm, each parts of the dipole has 220 coils of the enamel wire in 1- mm OD (18- AWG). Overall length of the two parts of the antenna is 60- cm.

Figure 2

A. Dipole Small Sized Helical Antenna.

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