"Antenna fields." . . "Dielectrics." . . "Frequency distribution." . . . . . . . . . "Final report to Goddard Space Flight Center on frequency selective reflection and transmission at a layer composed of a periodic dielectric"@en . . . . . . . . "Frequency selective reflection and transmission at a layer composed of a periodic dielectric"@en . . . "Boundary value problems." . . "Reflector antennas." . .