| 摘要 |
<p>PURPOSE:To make the apparatus compact and to make calibration easy by switching a transmission signal to two antenna systems for every two transmission triggers, and switching and taking out signals from the two antennas for every transmission trigger, thereby to form a receiving means of one system. CONSTITUTION:A control part 8 outputs a control signal 8a to make a switching part 2 switch for every two transmission trigger signals. At the same time, the control part 8 generates a control signal 8b to control a switching part 9 to switch for every transmission trigger signal. As a result, at every transmitting time, the signals received by an antenna AH for horizontally polarized waves and an antenna AV for vertically polarized waves are input to a terminal of the switching part 9 via circulators 4b, 4a, respectively. Each polarized wave receiving signal is input to a receiving part 5 by the switching operation of the switching part 9. Accordingly, four kinds of data H-H, H-V, V-H, V-V are obtained by one receiving system. It becomes possible to obtain an SAR image to an optional polarized wave through calculations of the data.</p> |
