The disclosure relates to a method for manufacturing a
polymer-based frequency component for a
radio frequency device with through-holes. The method comprises: providing a first
polymer foil with a pattern of blind holes at a topside of the first
polymer foil; disposing and planarizing uncured polymer onto the topside, the uncured polymer infiltrating the blind holes and covering the topside; curing the planarized uncured polymer to obtain a second
polymer foil comprising a cured polymer structure corresponding to the pattern of blind holes; removing excess polymer from the second
polymer foil; placing a releasable structure on the topside of the first
polymer foil, the releasable structure being configured to bond to the cured polymer structure and to release the cured polymer structure from the first polymer foil;
metal coating the releasable structure to obtain a fully or partially metallized polymer membrane with a pattern of through holes; and releasing the metallized polymer membrane from the first polymer foil to obtain the polymer-based frequency component with the through-holes.