Chireix- Mesny antenna may be used for operation on 435 MHz. Two designs of the antenna are presented here. Design
of four elements antenna is shown in Figure
1. Design of two elements antenna is shown in Figure 2. Both antennas have very wide pass band.
So it is not strictly demands to keep the sizes as shown in the
drawing. Chireix- Mesny
antenna has input impedance 200 Ohm so it is possible match the
antenna with 50- 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 3 to Figure 8
shows Z, SWR and DD of the antennas.
73 Nick, UR0GT
Figure 2
Two Elements
UR0GT Chireix- Mesny
Antenna for the 435 MHz
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Figure 1
Four Elements
UR0GT Chireix- Mesny
Antenna for the 435 MHz
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