It doesn’t look like a traditional beam, but it sure works DX like a SteppIR!
The SteppIR UrbanBeam Yagi is a fantastic choice for those that are limited by lot size, regulations (HOA’s) or even the critical eye of neighbors and spouses. The UrbanBeam has a unique appearance -some customers have remarked it looks like a bow-tie, or a butterfly! Regardless of its shape, the UrbanBeam delivers outstanding performance for an antenna that weighs only 45 lb (20.5 kg) and has a wind load (EIA-222-C) of a mere 4.4 sq ft (.41 sq m). The overall physical length of the Yagi is 30.5 ft (9.3 m), which allows for a turning radius of just 15 feet (4.72 m).
*Due to the confusion about the EIA/TIA wind ratings, SteppIR is now using PROJECTED AREA as the measurement for our customers to utilize when sizing an antenna to a tower. Projected area by definition is the total perpendicular surface area measured in square feet/square meters, that is exposed to wind. To calculate wind load you always take the largest projected area whether that is from the perspective perpendicular to the boom or perpendicular to the elements. In the case of SteppIR Yagi’s, the maximum projected area will always be the sum of the surface area’s perpendicular to the Yagi elements. This calculation is a constant number and will not change regardless of EIA specification changes. Be sure to present this information (along with the weight of the antenna, turning radius, element lengths, height of antenna, location exposure category, locations three-second gust wind speed, and locations maximum radial ice loading) to your structural engineer and/or tower manufacturer so that they can specify the correct product for your antenna.
- UrbanBeam Yagi
- 2 el on 20m-6m
- rotatable dipole 40/30m
- Turning Radius 15.5 ft
- Longest Element 30.5 ft
- Boom Length 48 inches
Weight 45 lb / 20.5 kg g *Projected Area 6.44 sq ft / 0.60 sq m Turning Radius 15.5 ft / 4.72 m Boom Length 4.0 ft / 1.22 m Longest Element 30.5 ft / 9.3 m Boom Outside Diameter 1.75 in / 4.45 cm Power Rating 3 KW Frequency Coverage **6.8 mHz—54 mHz Cable Requirements 12 conductor 22 ga shielded
Band dBi Gain dB F/R 40 m 1.6* 9.55(F/S) 30 m 1.77** 9.63(F/S) 20 m 6.5 12 17 m 6.6 12.6 15 m 6.6 14 12 m 6.7 15.7 10 m 6.65 14.8 6 m* 6.15 4
* A full size dipole is referenced at 2.1dBi
** Measured SWR is 2.3:1 for this model on 30m