| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antenna device, capable of realizing high-speed scanning by simple constitution in an array antenna for scanning a beam in a circular-arcuate shape for which antenna elements are arranged on a circumference. SOLUTION: This antenna device is composed of an input terminal 3, an excitation distribution control circuit 5, a beam direction selection circuit 4 and plural element antennas 6 connected to the excitation distribution control circuit 5. The excitation distribution control circuit 5 is constituted of the K (K>1) pieces of signal control circuits, and the signal control circuits are constituted of control terminals, the (2h+1) pieces of control signal detection circuits connected to the control terminals and switch circuits respectively connected to the control signal detection circuits. When defining the other terminals of the switch circuits respectively are defined asα1-αh,β1-βh andγ, the element antennas 6 are connected to the terminalsα1-αh, the terminalsβ1-βh are respectively connected to the terminalsα1-αh of the different signal control circuits and the terminalγis connected to the input terminal 3. The beam direction selection circuit 4 sends out control signals via the K pieces of the control terminals to the excitation distribution control circuit 5, and the control signal detection circuits close the switch circuits at the time of detecting the control signals.</p> |
