Weather is an additional factor that affects the propagation of radio waves. Wind, air temperature, and water content of the atmosphere can combine in many ways. Certain combinations can cause radio signals to be heard hundreds of miles beyond the ordinary range of radio communications. Conversely, a different combination of factors can cause such attenuation of the signal that it may not be heard even over a normally satisfactory path. Unfortunately, there are no hard and fast rules on the effects of weather on radio transmissions since the weather is extremely complex and subject to frequent change.
Calculating the effect of weather on radio wave propagation would be comparatively simple if there were no water or water vapor in the atmosphere. However, some form of water (vapor, liquid, or solid) is always present and must be considered in all calculations. Before we begin discussing the specific effects that individual forms of precipitation (rain, snow, fog) have on radio waves, you should understand that attenuation because of precipitation is generally proportionate to the frequency and wavelength of the radio wave. For example, rain has a pronounced effect on waves at microwave frequencies. However, rain hardly affects waves with long wavelengths (hf range and below.) You can assume, then, that as the wavelength becomes shorter with increases in frequency, precipitation has an increasingly important attenuation effect on radio waves. Conversely, you can assume that as the wavelength becomes longer with decreases in frequency, precipitation has little attenuation effect.
Attenuation due to rain
Attenuation because of raindrops is greater than attenuation because of other forms of precipitation. Attenuation may be caused by absorption, in which the raindrop, acting as a poor dielectric, absorbs power from the radio wave and dissipates the power by heat loss or by scattering.
Attenuation due to Fog
In the discussion of attenuation, fog may be considered as another form of rain. Since fog remains suspended in the atmosphere, the attenuation is determined by the quantity of water per unit volume and by the size of the droplets. Attenuation because of fog is of minor importance at frequencies lower than 2 gigahertz. However, fog can cause serious attenuation by absorption, at frequencies above 2 gigahertz.
Attenuation due to Snow
The scattering effect because of snow is difficult to compute because of irregular sizes and shapes of the flakes. While information on the attenuating effect of snow is limited, scientists assume that attenuation from snow is less than from rain falling at an equal rate. This assumption is borne out by the fact that the density of rain is eight times the density of snow. As a result, rain falling at 1 inch per hour would have more water per cubic inch than snow falling at the same rate.
Recommendations for solving these problems
- Although all the problems mentioned above are sudden and inevitable but you can save your CB system from the damages by securing each part of it through proper arrangements. Following recommendations have been proposed as a solution of the weather-related problems mentioned above.
- It is quite evident that due to bad weather, the SWR level for your CB system will be badly affected. So to ensure that your system doesn’t get damaged due to high SWR readings, keep your antenna well-tuned and if that is not possible, keep the radio off and the antenna covered so that your CB’s performance is not deteriorated.
- While making the connections, make sure everything is tight and sealed well. Don’t leave any space opened for the entry of water or snow into the system. You should check for these crevices or cracks in the coaxial cable at the time of buying them from the CB shop. Even if you find the defect later on, you can claim the cable to be replaced as all the CB components from Stryker are warranted.
- First try to get the best CB antenna from a well-known brand. Many best places to start with is the Sirio, Stryker, K40 outlet near you.
Stryker Antenna http://goo.gl/Tu7DrL
Sirio Antenna http://goo.gl/YGmwlH
K40 Antenna http://goo.gl/qocqJn
- These brand offers the best water-proof antennas that are sturdy and durable and will be safe from all the damages even if left open in the harshest of the conditions.
- Generally the CB services are down when the weather is not so good. So the wise CB users try to keep their radios off till the time the weather gets clear. This will simply prevent your system from catching any kind of intrusions and your receiver from getting damaged.
- You should try to tune the antenna in an open space when the weather gets clear.
- A brief description of the SWR readings and their significance are as follows
- 1:1: Although it is difficult to achieve but you can get it if you tune your CB antenna carefully.
- 1-1.5:1: It is very simple to achieve but difficult to maintain. A good CB installation will do.
- 6-2.0:1: This is the average reading you can achieve for your CB system.
- 1-2.9:1: This range shows that you have entered into the red zone and your CB system is at risk if you continue to operate it within this range.
- 0:1: This reading is simply a no-no because it shows the extreme SWR level that can completely devastate your CB system from inside.
These recommendations are the general solutions to majority of the weather-related issues that can hit your CB system during the course of the events.What kind of solution you adopt depends on the type of CB antenna or radio you have and how severely the weather changes around you. Then for taking a surer step on how you can secure your CB equipment, you can always take the help from experts who will guide you to flawless CB operations and will help you arrange for all this in advance.by
Get more stuff like this
Subscribe to our mailing list and get interesting stuff and updates to your email inbox.
Thank you for subscribing.
Something went wrong.