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SISO (Single Input Single Output)
In SISO type of antenna, there is only one transmitting at the transmitter end and one receiving antenna at the receiver end. This makes SISO the simplest to implement and easiest to design amongst all the four types of antennas available. Following is the block diagram of SISO system.

The channel bandwidth of SISO is limited by Shannon’s law which states that, theoretical maximum rate at which error-free digits can be transmitted over a bandwidth-limited channel in the presence of noise.
The only advantage of using SISO system is that it is very simple in design and cheap that all the other types of systems. SISO system has found out its applications in WiFi, TV, radio Broadcasting.
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