This is a highly integrated, ultra low power (10mW) RF radio for the 2.4GHz
ISM (Industrial, Scientific and Medical) band. The ultra low power(10mW)
enables the radio to operate in electromagnetic-sensitive environment,
thus many hospitals, including the Osaka University Hospital, adopted our
|Conventional simultaneous group call system
||Time division multiplexer system
|Communication system||Using different frequencies for each portable terminals, this system receives data, synthesizes them at the base station, and re-transmits them to the terminals.
While a terminal uses the same frequency for reception and transmission, the base station requires a receiver for four units. Therefore, it consumes a large amount of power, requires a complex configuration, and incurs high costs.
|This system uses only one frequency, and terminals transmit data in turn.
As each terminal switches between transmission and reception quickly by using the same frequency, the configuration is simple. However, advanced digital processing is required for control.