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In this paper, we presented several applications of millimetrewave EBG structures with controlled defects, fabricated using a rapid prototyping technique based on extrusion freeforming. Numerical simulations were performed for the design of millimetrewave woodpile structures. The fabricated woodpile structures have been measured and showed a good agreement with the simulated results. A directive millimetrewave...
EBG (electromagnetic bandgap) structures have lately attracted considerable attention both for the surface wave reduction and low profile antennas. One of the most remarkable features of EBG structures is their periodicity. Brillouin pointed out the bandgap phenomena by the periodic structure early in the 20th century. Indeed, the surface wave reduction by EBG structures is explained in the same way...
The power of undesired electromagnetic radiation from some wireless communication terminals such as a handy-phone and a personal computer tends to raise its level and to extend a frequency range. These terminals are composed of some printed circuit boards PCBs which contains many low-power LSIs, so that the immunity to the electromagnetic wave tends to fragile, and is some possibility of operating...
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