| 摘要 |
An array antenna device comprising an antenna array of a plurality of antenna elements (311...31n) for receiving an radio wave to produce receive signals and a signal combiner (32) for combining the receive signals to produce a combined signal. In order to reduce the combining loss and the transmission loss through the signal combiner, an amplifier and an IF conversion circuit comprising a mixer and a local oscillator are formed in an IC chip (541...54n). The antenna elements are contained in cases together with a plurality of IC chips, respectively, to form a plurality of units. The units are mounted on circuit board (51) with the signal combiner consisting of micro strip lines. In order to synchronize the local oscillators in the units with one another, a reference signal generator (41) is also formed on the circuit board and is coupled to the local oscillators. Variable phase shifters (561...56n) are used for adjust a direction of the main lobe of the antenna array and are also mounted on the circuit board. A similar structure is applicable to an array antenna device for radiating a transmission signal. |
