摘要:
PROBLEM TO BE SOLVED: To provide a thin antenna substrate for regularly reflecting radio waves over a wide bandwidth, and also to provide a thin RFID tag communicable with a wide bandwidth regardless of presence of an adjacent metal body.SOLUTION: This antenna substrate is equipped with: a conductor layer; a first soft magnetic layer arranged on the conductor layer; a patch layer where a plurality of conductor patches are two-dimensionally arranged on the soft magnetic layer; and a dielectric layer located on the patch layer when the conductor layer side is set on a lower side and having a mounting surface for an antenna pattern.
摘要:
PROBLEM TO BE SOLVED: To provide a waveguide structure which can be reduced in size inexpensively without using a chip component, and to provide a printed circuit board using the same. SOLUTION: The waveguide structure at least includes: first and second conductive planes 1 and 2 which are disposed parallel to each other; and a unit structure 3 including a transmission line 4, which is laid in a layer different from the first conductive plane 1 and the second conductive plane 2, uses the second conductive plane 2 as a return path and has an open end at one end, and a conductive via 5 for electrically connecting the other end of the transmission line 4 and the first conductive plane 1. The unit structures 3 are periodically arrayed linearly or two-dimensionally. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a device for steering or directing an RF-beam transmission by utilizing a photonic crystal structure, for example a prism. SOLUTION: The apparatus for steering an radio-frequency (RF) beam is equipped with a platform; a first and a second prisms mounted on the platform; a controller capable of steering the continuously transmitted RF beam via the first and the second prisms by rotating the first and second prisms; and a correction device constituted to correct the movement of the platform, by further rotating the first and the second prisms in response to the movement of the platform. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide an electromagnetic bandgap structure which doesn't make the total process longer because of dispensing with an inner layer drilling process, a plating process and filling process in the conventional manufacturing process of the printed circuit board although including the electromagnetic bandgap structure and can solve a mixed signal problem between an analog circuit and a digital circuit, and to provide a printed circuit board comprising this and a manufacturing method thereof. SOLUTION: The electromagnetic bandgap structure includes: a first metal layer; a first dielectric layer stacked on the first metal layer; a metal plate stacked on the first dielectric layer; a second dielectric layer stacked on the metal plate and the first dielectric layer; a second metal layer stacked on the second dielectric layer; and a via directed from the metal plate to the first metal layer and the second metal layer. The via is connected to the first metal layer but is not connected to the second metal layer. COPYRIGHT: (C)2009,JPO&INPIT