SMC Networks 2.4GHz/5GHz manual Antenna Position and Orientation

Radio Path Planning

A wireless bridge link is deployed to connect building A to a building B, which is located three miles (4.8 km) away. Mid-way between the two buidings is a small tree-covered hill. From the above table it can be seen that for a three-mile link, the object clearance required at the mid-point is 5.3 m (17.4 ft). The tree-tops on the hill are at an elevation of 17 m (56 ft), so the antennas at each end of the link need to be at least 22.3 m (73 ft) high. Building A is six stories high, or 20 m (66 ft), so a 2.3 m (7.5 ft) mast or pole must be contructed on its roof to achieve the required antenna height. Building B is only three stories high, or 9 m (30 ft), but is located at an elevation that is 12 m (39 ft) higher than bulding A. To mount an anntena at the required height on building B, a mast or pole of only 1.3 m (4.3 ft) is needed.

Warning: Never construct a radio mast, pole, or tower near overhead power lines.

Note: Local regulations may limit or prevent construction of a high radio mast or tower. If your wireless bridge link requires a high radio mast or tower, consult a professional contractor for advice.

Antenna Position and Orientation

Once the required antenna height has been determined, other factors affecting the precise position of the wireless bridge must be considered:

•Be sure there are no other radio antennas within 2 m (6 ft) of the wireless bridge

•Place the wireless bridge away from power and telephone lines

•Avoid placing the wireless bridge too close to any metallic reflective surfaces, such as roof-installed air-conditioning equipment, tinted windows, wire fences, or water pipes

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