vertical YAGI antenna has a sectioned half wave vibrator. Coaxial
cable is going inside of the low half of the vibrator. To the
low half of the vibrator is connected braid of the coaxial cable.
The central core of the coaxial cable is connected to the upper
half of the sectioned vibrator. Such design provides good symmetrical
for the antenna and low SWR with the 50- Ohm coaxial cable. Antenna
is radiated under a low vertical angle to horizon that is perfect
for 2- meters Band communication. Antenna has gain near 8- 9-dB.
Figure 1 shows the design of the antenna.
Traverse of the antenna made from insulator
stuff. For example, it is possible to use an old skis stick. As
usual such stick has diameter 12... 14- mm. Sectioned vibrator
made from two metal tubes (it may be aluminum or copper) in diameter
12... 14- mm. Vibrator is fastened to the traverse with help of
two square plates made from insulator stuff. Reflector and
two directors of the antenna made from aluminum strand wire in
diameter 5- 6-mm. However the reflector may be made from the same
tube that sectioned vibrator made. At this case the reflector
could be fastened to the traverse with help of two triangles.
The triangles may be from insulator or ever metal stuff.
Antenna is fastened to the mast at the lower