In the traffic field there are inductive loops that are installed under the road to detect cars. We cut asphalt and install 3-4 loop of wires like the following picture.
The corners are cut diagnostically in order to avoid sharp edges, BUT my boss is emphasizing that this type is better than rectangular shape electrically. He says the more is the shape similar to circle the better performance.
Because cutting corners add extra effort and I found a solution to reduce sharp edge impact, I want to know: is it true and how much is it different?