Your antenna is the single most important factor affecting VHF radio range, and three key parameters determine antenna performance: gain, height and length. The higher the gain (decibel rating), the greater the strength and distance of the radio signal.
Read moreHow do you calculate sight distance?
For example, if your height of eye is 9 feet above the surface of the water, the formula would be: 1.17 times the square root of 9 = Distance to the horizon in nautical miles .
Read moreHow is UHF range calculated?
To calculate the range of an antenna, you multiply the square root of the antenna’s height above water (in feet) by 1.42 . The product will equal the antenna’s communication range in miles.12 Şub 2014
Read moreHow is radio range calculated?
That formula is: Horizon in kilometers = 3.569 times the square root of the antenna height in meters . For example, if the antenna height of a radio is at 6 feet (1.82880 meters tall) the horizon is 2.99 miles away (4.83 kilometers) and another radio with the antenna at 6 feet, that equals approximately a 6-mile range.
Read moreHow far is radio line of sight?
So according to our rule-of-thumb, 2 people around 6 feet tall using a 5 watt handheld two-way radio, used on flat ground with no obstacles, will have a maximum range of approximately 6 miles .
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