Chireix- Mesny antenna may be used for operation on 1295 MHz. Design of the antenna is shown in Figure 1. The antenna has wide pass band- 290 MHz at
SWR less the 1.5:1. So it is not strictly demand to keep the sizes
as shown in the drawing. Antenna has input impedance 200 Ohm so
it is possible match the antenna with50- Ohm coaxial cable with
help of 4:1 transformer.
It is possible to bridge four such antennas
to feed the system with 50- Ohm coaxial cable. In this case DD
of the system would be narrow compare to one element antenna.
Antenna may be made from almost any stuff, copper, aluminum or
stainless wire. You may play with model to see how the parameters
will be changed depends on the used stuff.
Figure 2 shows Z of the UR0GT Chireix- Mesny Antenna for the
1295 MHz. Figure 3 shows SWR of
the UR0GT Chireix- Mesny Antenna for the 1295 MHz.
4 shows DD
of the UR0GT Chireix- Mesny Antenna for the
73 Nick, UR0GT
You could find some more information on Chireix- Mesny Antenna that published
in AntenTop magazine:
Horizontal Antenna with Vertical Polarization for
the 2- meter Band
Chireix- Mesny TV Antenna