| 摘要 |
PROBLEM TO BE SOLVED: To provide a means to conduct distribution service between one-point and multi-point for an improved broad frequency band radio communication in a millimeter wave frequency band. SOLUTION: A plurality of unidirectional transmission antennas 31-34 connecting to a transmitter at a node in the system that conducts one-to-multi point communication for a short distance with a small power are arranged to emit a radio wave in different directions around the node. The polarized wave form where a polarized wave for a transmission signal is changed around the node is adopted for the unidirectional transmission antennas 31-34. Each of subscriber stations 41 around the node has a polarized reception antenna to receive a selected signal from the unidirectional transmission antennas 31-34. Furthermore, the system has a capability of sending and emitting a subscriber signal to a position of the node transmitter for bidirectional communication. |
