Radiator Modes

On the 160m and 80m bands, the entire length (18 metres) of the vertical is used for radiation. On the 40m, 30m and 20m bands, the vertical radiator is about 15 metres long and elevated above ground (minimising ground-proximity losses).

The “elevated loading” and “elevated feed” is positioned about 11 metres above ground. The two horizontal elevated radial wires, each about 4 metres long, are suspended about 3 metres above ground.

Band

160m

80m

40m

30m

20m

Mode

Electrical quarter-wave vertical using a combination of elevated loading and a small amount of base loading.

Quarter-wave vertical with no inductive loading. (The base coil is used to effect impedance matching).

Half-wave elevated-feed elevated vertical dipole. (The two elevated radial wires make up the length of the lower half of the dipole). The current maximum is about 11 metres above ground.

Half-wave, elevated-feed, elevated vertical dipole. The current maximum is about 12 metres above ground.

Two vertical co-linear half-waves in-phase. (The two elevated radial wires act as conventional radials, also driven in-phase with the vertical radiator). The height, of the top current- maximum, is about 15 metres above ground.

Patent application, for the DX – Low-Band Vertical, is pending.

Results

	Introducing the DX – LOW-BAND VERTICAL from DBL Antennas