The described antenna is produced in Belgium under the name "BIG STAR".

The antenna is a system of vertical collinear with vibrators a circular radiation pattern in the horizontal plane.

Vertical antenna for 144 MHz
Fig. 1

The theoretical gain of the antenna - 6.5 dB relative to a half-wave vibrator. Experimental verification showed that at a distance of 100 km with the transition dipole on the described antenna gives a gain of 9 dB. The total height of the antenna - about 5 meters.

The electrical circuit of the antenna shown in Fig. 1, the design implementation in Fig. 2 - 6. The vibrator is made of duralumin pipes, broken Teflon insulators.

Adjusting the antenna is about moving the point of connection of the Central conductor of the cable to the inductance C to obtain resonance at the operating frequency.

This antenna was used when operating via the RS satellites and showed good results, especially in low location of the satellite above the horizon

Literature

  • "QТС" 4/92. SP2FBC & SP2MBE
  • Publication: www.cxem.net

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