Upper and lower bounds of 180 degree unit element of a ridge waveguide: calculations and measurements
Goussetis, G., Budimir, D. and Helszajn, J. 2001. Upper and lower bounds of 180 degree unit element of a ridge waveguide: calculations and measurements. Microwave & Optical Technology Letters. 31 (4), pp. 260-261. https://doi.org/10.1002/mop.10004