Simple Dipole Antenna for the 7 and 21- MHz Band

Simple Dipole Antenna for the 7 and 21- MHz Band

The publication is devoted to the memory UR0GT.

Credit Line: Forum from:

www.cqham.ru

By: Nikolay Kudryavchenko, UR0GT

A dipole antenna is most simple antenna ever. Easy to make easy to tune to the working band. And it is benefit if the simple antenna works on two bands. Below described simple dipole antenna that can work on 7 and 21- MHz. Figure 1 shows design of the antenna.

If the antenna cannot be placed symmetrically nearby objects it would be great to install on the feeding coaxial cable several ferrite rings. Antenna may be made from any wire in 1- 3 mm in diameter.

MMANA file below allows you play with the antenna with conditions on your location.

Figure 2 shows Z of the Simple Dipole Antenna for 7 and 21- MHz Band at 7-MHz Band. Figure 3 shows SWR of the Simple Dipole Antenna for 7 and 21- MHz Band at 7-MHz Band. Figure 4 shows DD of the Simple Dipole Antenna for 7 and 21- MHz Band at 7-MHz Band.

Figure 5 shows Z of the Simple Dipole Antenna for 7 and 21- MHz Band at 21-MHz Band. Figure 6 shows SWR of the Simple Dipole Antenna for 7 and 21- MHz Band at 21-MHz Band. Figure 7 shows DD of the Simple Dipole Antenna for 7 and 21- MHz Band at 21-MHz Band.

73! de UR0GT

The MMANA model of Simple Dipole Antenna for 7 and 21- MHz Band: http: //

www.antentop.org/024/ur0gt_dipole_024.htm

Figure 1 Simple Dipole Antenna for 7 and 21- MHz Band

www.cqham.ru

www.antentop.org

Page- 65