K. Helmreich

A Physical Surface Roughness Model and Its Applications

Gerald Gold, K. Helmreich · IEEE Transactions on Microwave Theory and Techniques · 2017 · 169 citations

Engineering, Mechanical Engineering, Roughness Parameters +17

Analytical Waveguide Model Precisely Predicting Loss and Delay Including Surface Roughness

K. Lomakin, Gerald Gold, K. Helmreich · IEEE Transactions on Microwave Theory and Techniques · 2018 · 48 citations

Waveguides, Engineering, Surface Wave +19

A physical model for skin effect in rough surfaces

Gerald Gold, K. Helmreich · 2012 · 47 citations

Engineering, Mechanical Engineering, Computer-aided Design +22

Surface impedance concept for modeling conductor roughness

Gerald Gold, K. Helmreich · 2015 · 41 citations

Electrical Engineering, Engineering, Boundary Condition +13

3D Printed E-Band Hybrid Coupler

K. Lomakin, L. Klein, L. Ringel et al. · IEEE Microwave and Wireless Components Letters · 2019 · 40 citations

Materials Science, Electrical Engineering, Optical Materials +13