ANTENTOP- 01- 2011 # 015

Efficient Field Low Height Dipole Antenna for the 20- meter Band

Tuning of the Antenna

Install the antenna according to the Figure 2. Angle between the antenna wires should be near 130- degree. Length of the each wire is 6.0- meter. Turn on the coaxial cable to a MFJ- 259 or to SWR- meter plus Transceiver.

Conclusion

The antenna was tested in my mountain trips. It is showed good result. I am strongly recommended the antenna for one- day field operation as well as for several- days mountain trip. Antenna may be designed as for one band either for several operation bands.

Do shortening the wires by length of the 10- cm by low SWR. Sometimes it needs to change value of the capacitors to reach the low SWR. As usual it is possible to get SWR 1.0:1.0.

Multi Band Version of the Antenna

The Antenna may be made in a multi band version. For the version antenna wires are broken into lengths that would be resonance for the desire bands. Shortening capacitor may be the same for all of the bands. Turning on of the next band is provided with the help of the jumper. Figure 3 shows the multi band antenna. Tuning of the antenna begin from the upper band and sequentially is going to the next lower band.

Unpacked Antenna Ready to Installation

Figure 3 Multiband Field Antenna

73! UA6HJQ

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