A substrate-integrated waveguide (SIW) antenna is an implementation of a waveguide antenna in a microstrip antenna. The microstrip antenna. as a low-profile antenna. suffers from narrow impedance bandwidth. https://safeersappliancers.shop/product-category/neff-d94qfm1n0b-n50-built-in-90cm-3-speeds-a-chimney-cooker-hood-stainless-touch/