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By: Nikolay Kudryavchenko, UR0GT

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

Figure 1

Four Elements UR0GT Chireix- Mesny Antenna for the 435 MHz

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