| 摘要 |
<p>The imaging system (20) includes a microwave signal generator (21) which is supplied, on a line (22), with clock pulses from a clock (23). The output of the signal generator (21), which may be a short broadband pulses or a signal synthesized from multiple discrete frequencies, is provided on a line (27) to a directional coupler (28). The output of the directional coupler (28) is provided on a line (30) to a switching system (31) which selectively directs the power from the line (30) to lines (33) leading to each of the antennas (35) which are arranged in an array (36) antennas.</p> |
