TABLE I.
Specifications for the 35 MHz 1–3 Composite Annular Array
| Center frequency | 35 MHz |
| Number of elements | 8 |
| Aperture size | 3.1 mm |
| Transmit focus | 6.5 mm |
| Bandwidth (−6 dB) | >50% |
| Crosstalk (element-to-element) | <−30 dB |
| Insertion loss | <20 dB |
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