摘要:
A wireless communication device includes a wireless IC device, a dielectric substrate, and a metal plate. A radiation conductor coupled to the wireless IC device is provided on the front surface of the dielectric substrate, and a ground conductor connected to the radiation conductor through an interlayer connection conductor is provided on a back surface. The dielectric substrate is fixed to the metal plate via an insulating adhesive, and is crimped by a conductive member. The front and back surfaces of the metal plate are electrically connected to each other by the conductive member, and when a high-frequency signal is supplied from the wireless IC device, a high-frequency signal current on the front surface side of the metal plate is conducted to the back surface side of the metal plate through a surface boundary portion between the conductive member and the metal plate, and radiated as a high-frequency signal.
摘要:
A packaging material includes an electromagnetic coupling module for an RFID system, in which a radio IC chip is protected from external shock and environmental change without affecting the planarity of the packaging material, the assembly including an electromagnetic coupling module is facilitated, and the radiation characteristics are satisfactory. A packaging material includes a liner and a wave-shaped core material, wherein an electromagnetic coupling module is arranged inside of the packaging material. The electromagnetic coupling module includes a radio IC chip and a feeder circuit board, on which the radio IC chip is mounted, the feeder circuit board including a resonant circuit that includes an inductance element. The packaging material is made of a dielectric, wherein the dielectric and the electromagnetic coupling module are electromagnetically coupled to transmit/receive high frequency signals.
摘要:
A wireless IC device includes an electromagnetic coupler module including a wireless IC chip processing transmission and reception signals, and a feeder circuit board. In the wireless IC device, a first coupler defining a feeder circuit arranged on the feeder circuit board is electromagnetically coupled with a first mount of a first radiation plate, and a second coupler is electromagnetically coupled with a second mount of a second radiation plate. The couplers are respectively defined by line electrodes. Input and output terminal electrodes of the wireless IC chip are electrically connected to the line electrodes. The wireless IC chip is operated by the first and second couplers in response to a signal received by first and second radiation plates. A response signal from the wireless IC chip is radiated to the outside from the first and second radiation plates via the first and second couplers.
摘要:
An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability.
摘要:
An LC-included electronic component has a greatly reduced size, a greatly increased resonator Q, and outstanding reliability. Inductor via holes are successively connected in a direction in which insulating sheets are stacked to define columnar inductors. The inductor via holes each have a Y-direction dimension greater than an X-direction dimension on the X-Y plane of a section shape, and the shape has Y-direction ends of increased width. Specifically, each Y-direction end of the inductor via holes is substantially circular, and the other portions are linear.
摘要:
A multilayered LC composite component in which a fine adjustment to a desired frequency can be performed, includes multilayered body sheets on which internal electrodes including capacitor electrodes and inductor electrodes are stacked via dielectric layers. On surfaces of the multilayered body sheets, there are disposed a ground internal electrode and input/output extraction electrodes. A trimming electrode is arranged on the multilayered body such that the trimming electrode is opposed to some of the internal electrodes and is electrically connected to the ground internal electrode. In order to make a rough frequency adjustment, insular electrodes are isolated from the trimming electrode by trimming grooves. Then, a coating material is filled in each of the trimming grooves to make a fine adjustment.
摘要:
An LC resonator includes insulation sheets and inductor patterns that are electrically connected through long via-holes provided in insulation sheets, so that tubular structures each having an insulator material disposed therein and having a substantially rectangular cross section are produced. The tubular structures are laminated through sheets to define an inductor having a double structure. A capacitor pattern is opposed to the open ends of the inductor patterns, respectively, to produce a capacitor. That is, the capacitor pattern is arranged between the tubular structures. The capacitor and the inductor having the double structure define an LC parallel resonance circuit.
摘要:
A laminated LC filter having very large inductance and an excellent Q characteristic, includes insulation layers, inductor patterns having substantially the same shapes and capacitor patterns. The inductor patterns are laminated through the insulation layers, and constitute the inductor of the duplex structure. Similarly, the inductor patterns also constitute the inductor of the duplex structure. The capacitor patterns are opposite to the increased width portions of the inductor patterns, and define the capacitor. Similarly, the capacitor patterns are opposite to the increased width portions of the inductor patterns, and define the capacitor. The coupling capacitor pattern is located between the inductor patterns.
摘要:
A band pass filter includes LC resonators defined by laminated layers and is constructed such that the resonant frequencies of the LC resonators shift in the same direction when laminated layers deviate from each other. In the arrangement of the band pass filter, the inductor pattern of a first LC resonator and the capacitor pattern of a second LC resonator are disposed on a surface of a first ceramic sheet. The inductor pattern and the capacitor pattern extend to the same side of the first ceramic sheet. In addition, the capacitor pattern of the first LC resonator and the inductor pattern of the second LC resonator are disposed on a surface of a second ceramic sheet. The capacitor pattern and the inductor pattern extend to the same surface of the second sheet.
摘要:
A duplexer having a laminated structure includes a first three-stage band-pass filter having parallel LC resonators, and a second three-stage band-pass filter having parallel LC resonators. The first and second three-stage band-pass filters are coupled through impedance matching patterns. An inductor of each of the resonators is defined by via-holes formed on insulator sheets which are connected in sequence in the laminating direction of the sheets.