Abstract: The present disclosure describes a pultruded panel profile with a sandwich structure and a method of manufacturing such a panel profile. The sandwich structure has at least one a core layer and surface layers on both sides of the sandwich structure. The core layer comprises at least one signal window section made of a signal-transparent material, the signal-transparent material being substantially transparent to at least one wireless signal. The core layer further comprises a peripheral section surrounding the signal window section, the peripheral section having a different material composition than the signal window section.