How can this pattern be recreated? 
Pay attention that it has round lines in the bottom and straight line at the top.

[![enter image description here](https://i.stack.imgur.com/kbTLp.jpg)](https://i.stack.imgur.com/kbTLp.jpg)

I tried to use blend tool (in Illustrator) on two arcs and one dot with dotted stroke, but result is far away from original picture.

Trick is to calculate size of arcs, distances, dots frequency, but guys.. there should be another way to to it.