ANTENTOP- 01- 2010, # 012

Directional Helical Antennas

Figure 5 Design of the Four- Wire Line

4.     If the dipole is loaded too much the feeder, change distance between wires of the Two- Wire Line.

5. Second dipole with the phase open wire line connected to the feeder. (First dipole is disconnected!) Tune the dipole to the resonant (using the tuning strand wire). (Figure 6C)

6.     If the dipole is loaded too much the feeder, change distance between wires of the phase line.

7.     Connect the antenna to the feeder. (Both dipoles, as shown on the Figure 1 and Figure 4) (Figure 6D) Antenna should not detune the feeder. If it is, repeat tuning process from paragraph 1.

Figure 6 Steps for Tuning Directional Dipole Helical Antenna

www.antentop.org

Page-37