| 摘要 |
PURPOSE:To easily array respective modules for transmission and reception while using antenna elements in common for both transmission and reception even if an in-use frequency band becomes high by providing phase shifting circuits between 1st and 2nd antenna elements and further providing a primary radiator which sends out a sent signal to the 2nd antenna elements and 3rd antenna element. CONSTITUTION:The sent signal S4 sent out by the primary radiator 19 is received by the 2nd antennas elements 181-18N in a transmission state, its phase is controlled by the phase shifting circuits 171-17N, and then the resulting signals are sent out by the 1st antenna elements 161-16N. In a reception state, on the other hand, signals received by the 1st antenna elements 161-16N are sent from the 2nd antenna elements 181-18N are received by the 3rd antenna elements 201-20N. Consequently, even if the in-use frequency band becomes high, the respective modules for transmission and reception are easily arrayed while the antenna elements are used in common for both transmission and reception.
|
