| 摘要 |
A fixed-position transmitter node makes wireless links to two or more fixed-position receiver nodes located within a non-omnidirectional composite coverage volume. The antenna structure for the transmitter node includes an RF power splitter, two or more passive antennas, and an enclosure that houses the antennas. An RF signal is split by the RF power splitter and fed to each of the passive antennas. Each antenna is characterized by its own individual coverage volume, based on that antenna's gain pattern, orientation and RF signal received. The individual coverage volumes of the antennas together in the aggregate define the non-omnidirectional composite coverage volume of the overall antenna structure. In this way, the passive antennas as a group can make the wireless links to the receiver nodes in a directional manner.
|
