
Antenna Mounts

Wireless technology in industrial environments is becoming more and more common, whether it is utilizing Wi-Fi or proprietary systems for long-distance communication. In order for wireless technology to be successful, the signal must be transferred between a transmitter and receiver, converting the RF electrical signal from the transmitter into an electromagnetic wave in free space, and then converting that wave back again at the receiver. The device that makes this possible is the antenna.
In industrial environments, there may be elements that interfere with the reception of a signal at the receiver and the right type of antenna can provide the transmission path to suit the application’s needs. Antennas come in many shapes and sizes and each has its own specific design characteristics that determine the range and radiation pattern of the radio signal. The radiation pattern or shape of the radio signal is what is referred to as antenna gain. Antenna gain is measured in decibels. The higher the gain of the antenna, the more focused the signal. The transmitting radiation pattern is the same as the sensitivity pattern for receiving. Which means that the direction in which the antenna transmits the strongest signal is also the direction in which it is most sensitive for receiving signals.
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Ultra High Frequency (UHF) is the designation that has been assigned for any radio frequency in the range between 300 megahertz and 3 gigahertz. This designation was assigned by the International Telecommunication Union. Here are some basic facts about UHF:
- The frequency range is directly related to the wavelength range, which will range from 1 meter up to 1 dm.
- The size of the antennas used for this frequency range are dictated by the wavelength.
- Depending on the frequency being used, it is possible to see the behavior of specific wavelengths vary from other frequencies in the UHF spectrum.
- In most cases wavelengths in UHF spectrum propagate by line of sight.
- Used in medium range radio transmission signals such as: cell phones, walkie talkies, wireless networks, FM radio stations, TV broadcasting, etc.
- The higher the frequency, the more important line of sight in transmitting and receiving radio communications.
- In most cases, UHF radio transmission is limited to about 30-40 miles, often shorter depending on local terrain.
- The Federal Communications Commission has allocated that different ranges within the UHF spectrum be used only for certain purposes.