What is a compatible scanhead?

A compatible scanhead should have the same specifications as the original.

The specifications should include the following at least:

1. center frequency

2. elements number

3. pitch

4. convex radius

Better,the following specifications can be satisfied:

5. relative band width (RBW )is as the same as the original, or larger than 50%, usually.

6. the capacitance is within 10%.

7. the average sensitivity is within 2dB.