A single input single output (SISO) directional antenna is a common form of antenna used in wireless communications systems. This system uses one antenna at the source and one at the destination to transmit and receive signals. SISO is the simplest form of antenna technology, but it has several limitations. This technology is susceptible to multipath effects, in which the electromagnetic fields are scattered by obstacles and take different paths to reach their destination. This results in intermittent reception, reduced data speed, and an increased number of errors.
A SISO directional antenna uses a panel that is mounted on a pole, wall, or ceiling. It offers nine-dBi gain across several frequency bands and can be fed by either short pigtail cables or low-loss coaxial cables. Its high gain, low-diffraction efficiency, and high-gain design make it a superior choice for directional antenna applications. In addition to being highly efficient, this antenna is also easy to install.
A SISO Directional Antenna has a narrower lobe width and a higher gain. It is commonly used in communication systems and in environments with large target densities and limited coverage. In contrast, a SISO Omni Antenna exhibits uniform radiation throughout 360 degrees of the horizontal axis, which is referred to as non-directivity. A smaller lobe width, or slit, equals a higher gain.
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