ANTENTOP- 01- 2014 # 018

44 Feet Dipole. Where is the Truth?

Note I.G.: Below you can see SWR (at 350- Ohm Terminal) for 66- Feet Dipole Antenna placed at 10 and 20- meters above real (simulated by MMANA) ground. As you can see the 66- feet antenna really has at the amateur bands SWR/Impedance that could be matched with simple ATU.

As you can see, the 66- Feet Dipole Antenna is better matched with 350- Ohm feed line in compare to 44 and 88- -Feet Dipole Antenna. However, if we take in consideration the Gain and Diagram Directivity, the 88- Feet antenna will beat the 66 and 44-Feet Dipole Antenna.

SWR (at 360-Ohm Terminal) 66-Feet Antenna Placed at 10- meters above Real Ground

SWR (at 360-Ohm Terminal) 66-Feet Antenna Placed at 20- meters above Real Ground

So Len Cebik's 44 feet dipole falls short to achieve true half wave resonance on 40 meters of course... But because he recommended to use the open wire transmission line, preferably 400 to 500 ohms

impedance, the open wire line will provide ¨ the missing length¨ by means of the first few feet of the transmission line

Figure 4

78- Feet Dipole Antenna

www.antentop.org

Page- 23