A multimode service radio communication apparatus, that provides a hand-held
or
vehicle-mounted terminal with radio communication and radio broadcasting information
of a radio information and communication providing system including mobile communication
systems and intelligent transport systems, includes a frequency division multiplexer
that integration-converts individual radio or intermediate frequencies modulated
for mobile telephones and broadcasts so that the modulated frequencies are included
in a specific frequency band, and produces radio signals in the specific frequency
band; supply device for supplying the radio signals; an antenna for receiving and
transmitting the supplied radio signals; a shared antenna for receiving the transmitted
radio signals; and terminals to which specific frequencies in the specific frequency
band are selectively linked.