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Telecom Business Review | Wednesday, June 02, 2021
Rectangular & cellular antennas offer different services; the rectangular type serves nearby regions, whereas the circular type is employed for the communications of inter BTS.
Fremont, CA: There are two types of antennas employed in mobile communications, such as rectangular & cellular. These antennas offer different services; the rectangular type serves nearby regions, whereas the circular type is employed for the communications of inter BTS.
Rectangular Antennas
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Rectangular type antennas are directional and are utilized for providing the exterior region in the surrounding area of the mobile tower. These antennas are mainly connected to the BTS using co-axial cables, which transmit or receive data from nearby mobile phones. Normally, these antennas support all the RF spectrum utilized in network services like 2G or 3G, or 4G.
Circular Antennas
Circular-type antennas are mainly used for communication among different BTSs. These antennas work at microwave frequencies & include point-to-point transmission or reception. The connection of these antennas can be made through waveguides which will end at the BTS, and from there, the data can be sent to nearby areas using Outdoor antenna Units or IBS.
Radiation Patterns of Different Types of Antennas
The antenna's radiation pattern can represent the energy emitted through an antenna. These are diagrammatical representations for the emanated energy distribution into space, such as a function of direction.
In the antenna's radiation pattern graph, the energy being emitted can be signified through the patterns illustrated in a specific way. These patterns are power or field patterns. In that, arrows signify radiation directions.
The designs of distinct antennas generate dissimilar radiation patterns, and their complexity mainly depends on the design of an antenna. The power patterns are destined as a function of the magnitude of diverse fields. They are planned on logarithmic otherwise, usually on a dB scale.
Field patterns can be designed as a function of different fields. They are designed over a logarithmic scale.
Radiation patterns are available in various types like the following.
• Omni-directional or non-directional pattern
• Pencil-beam
• Fan-beam
• Shaped beam
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