an antenna for my receiver DEGEN- 1103. The antenna should provide
a good reception on to HF bands. I would like to take the receiver
to a field or hotel room. So, the antenna should be small in sizes
and easy to installation. Through some my experimenters I stopped
on a Loop Antenna.
Figure 1 shows the design
of the HF Loop Antenna. It is very simple antenna and cheap in
the used parts. The antenna works fine from 7.0 to 30.0- MHz.
Loop of the antenna made of 1- meter length of a TV-Coaxial Cable
(75- Ohm). For the Loop of the antenna it is used the braid of
the coaxial cable. The length of the cable has RF- Connectors
from the both sides.
I found in junk – box of my wife a plastic box (it was a plastic
box from old cosmetic). Inside of the plastic box there were installed
two RF – Connectors for the TV- Cable, a variable capacitor 2x
250- pF and a toggle switch. At the band 9.0- 30.0- MHz it is
used one section of the variable capacitor. At the band 7.0- 15.0-
MHz there are used both section of the variable capacitor. The
toggle switch turns on the sections to the Loop antenna.