Vector ElectroMagnetics proposes to develop HPM radome designs with ultra-low in-band internal reflection.This will be accomplished with a combination of composite materials and/or FSS layers or impedance matching layers.FSS layers may be used only for in-band impedance matching, or may also be used to create out-of-band rejection.Full wave computational electromagnetic CEM analysis will be used at both the flat-panel design stage as well as the 3-D antenna radiation pattern analysis stage.Concurrently with the RF design, the radome will be designed with a hard seal in order to minimize outgassing of the radome material.HPM,Radome,FSS,Dielectric,Materials,RF Transmission