Are line-of-sight installations viable on hilly terrain?

Evaluating Hilly Terrain

When evaluating hilly terrain for line-of-sight installations, the first step is to assess the overall layout of the land. A topographic map can be used to identify areas with clear line of sight and those with potential obstacles such as ridges, valleys, or dense vegetation. For example, a site with a clear view of the horizon for at least 50% of the surrounding area is generally considered suitable for a line-of-sight installation.

Mitigating Obstacles

To overcome obstacles on hilly terrain, consider the following techniques: installing a higher antenna to elevate the signal above obstructions, using a directional antenna to focus the signal on the receiving station, or installing a repeater to extend the signal over longer distances. For example, a 60-foot tower can elevate the antenna above most obstacles, while a directional antenna with a 30-degree beamwidth can focus the signal on the receiving station. Additionally, a repeater can extend the signal by up to 10 miles, depending on the terrain and signal strength.

Planning for Installation

To ensure a successful line-of-sight installation on hilly terrain, it’s essential to plan carefully and conduct thorough site surveys. This includes measuring the distance between the transmitter and receiver, identifying potential obstacles, and selecting the optimal antenna and mounting system for the terrain. For instance, a site survey may reveal that a 20-foot antenna tower is sufficient for a particular installation, while another site may require a 50-foot tower to maintain signal strength. By carefully evaluating the terrain and planning the installation, you can ensure a reliable and high-performance line-of-sight connection.