| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission antenna and a reception antenna, a mixer, and a reception circuit such as a low noise amplifier on the same plane of a substrate, and to suppress leakage of transmission radio waves from the transmission antenna to the reception circuit, without using a radio wave absorber.SOLUTION: An antenna device has a transmission circuit connected with a transmission antenna by transmission antenna feeder, a reception circuit connected with a reception antenna by a reception antenna feeder, and connected with the transmission circuit by a local signal line, a resin board mounting a conductor film so as to surround the transmission antenna, reception antenna, transmission circuit, and reception circuit, and a radome forming a first cell for housing the transmission circuit, and a second cell for housing the reception circuit, and forming a conductor film on the partition wall between the first and second cells, where a groove surrounded by a conductor film and in which the local signal lines are arranged is formed to interconnect the first and second cells.SELECTED DRAWING: Figure 2 |
