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The Measured Pulse Echo Characteristics for all Annular Array Elements
| Element # |
||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Center frequency (MHz) | 33.5 | 34.5 | 32.8 | 34.1 | 34.1 | 33.6 | 34.8 | 33.9 |
| −6-dB bandwidth (%) | 57.0 | 57.8 | 54.1 | 57.4 | 59.0 | 60.6 | 57.8 | 56.5 |
| Vpp (mV) | 1125 | 765 | 681 | 754 | 743 | 735 | 644 | 622 |
| −20-dB pulse length (ns) | 95 | 85 | 92 | 85 | 84 | 82 | 94 | 87 |
| Uncompensated IL at 35 MHz (dB) | 29.7 | 36.6 | 44.2 | 44.2 | 47.9 | 51.0 | 56.3 | 58.4 |
| Compensated IL at 35 MHz (dB) | 12.5 | 13.4 | 15.1 | 13.5 | 14.7 | 14.4 | 15.2 | 15.2 |
