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# Rhombic Math & Design

Updated: 7 days ago

Wire Antenna Calculator (ws6x.com)

Good symmetry is of vital importance for the performance of this antenna. The width of the antenna's main lobe is determined by the angles q and a, often referred to as tilt and apex angle. In general, the wider the rhombic (greater a and smaller q) the wider the beam and vice versa. Of coarse q and a are linked since the sum of half the tilt angle and apex angles is always 90 degrees: **q**/2 + a/2 = 90