antennas - sector antennas and others

In the world of antennas, sector antennas are said to be some of the best on the market because of their high directional gain. This means that they offer more precision in targeting radio signals and their narrow radio beams offer better signal strength. This is why high-gain antennas are preferred in space missions and in open areas where geography will not interrupt radio waves. But what really makes a high directional gain antenna the best choice?



A High Gain Antenna can make a Signal 100 Times Stronger


High gain directional antennas such as sector antennas are known for transmitting more power to their receiver, which in turn increase the strength of the signal that it receives. This helps them strengthen a signal for up to 100 times than a regular antenna by capturing more energy.



Can Transmit to a Wider Distance


When compared to omnidirectional antennas, sector antennas transmit to a wider distance because it reduces interference from other sources. Their radio frequency can also be diverted in a specific direction to help transmit a signal to a farther distance. The frequencies used for directional antennas may vary from 200 to 300 MHz because of their size and their wideband property also depends on their type and directional properties.



Known for Energy Savings


In a regular omnidirectional antenna, a signal intended from Node A to C will need to travel from Node A to Node B before it reaches Node C. This process will take longer and uses up more energy. But in the case of sector antennas, this process is cut short because of the antenna’s directional gain. This means that Node A will reach Node C in a single hop because its beam is focused and has the ability to reach its receiver at a farther distance. But with their ability to increase transmission range, directional antennas require lesser power to reach their destination, which helps in saving energy spent by nodes for transmitting and receiving signals.



A High Gain Antenna makes Multiple Transmissions Possible


Perhaps one of the best features of directional antennas is their ability to allow continuous multiple transmissions without any interruptions. This means that Node A and Node B can transmit signals simultaneously with Node C and Node D without interruptions because the sender has the ability to focus the beam towards a specific receiver. Unlike omnidirectional antennas where continuous transmission is not allowed, directional antennas can perform the process seamlessly and without any problems.



Finally, directional antennas are highly in demand because of their ability to prevent wormhole attacks, which are used to disrupt signals using a high-quality out-of-band link that replays forwarded packets to other locations. When this happens, communication between nodes is completely disrupted, which can easily cause problems. With directional high gain antennas, a node will only get the signal that it’s intended to receive. This means that an attacker will not have the opportunity to execute a wormhole attack because the signal will only be recognized as a false neighbor.



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