Text this: Radiation of open-ended waveguides through a multi-layer superstrate

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| || | ||  \ \\/ // \ \\ / //  /_   _//  | \| || 
| '--' ||   \ ` //   \ \/ //    -| ||-   |  ' || 
| .--. ||    | ||     \  //     _| ||_   | .  || 
|_|| |_||    |_||      \//     /_____//  |_|\_|| 
`-`  `-`     `-`'       `      `-----`   `-` -`