| 摘要 |
The structure has a stack of layers (20, 24-27) intercalated between layers (28-33) comprising a conductor pattern with polarization rotation function. The layers (20, 24-27) are made of a core material such as polyurethane or polymethacrylimide foam, and the layers (28-33) are made of a skin material such as epoxy glass or copper. The layers (20, 24-27) have recesses (21) crossing both sides of the layers (20, 24-27), where the recesses of two attached layers are connected two-by-two through holes (35) in the layers (28-33). |
