Abstract:
A printed circuit board ("PCB") includes a first pattern structure, a second pattern structure, a third pattern structure, and a fourth pattern structure. The first pattern structure includes a first ground pattern. The second pattern structure includes a first line pattern overlapping the first ground pattern and a second ground pattern electrically insulated from the first line pattern. The third pattern structure includes a third ground pattern overlapping the first line pattern and a second line pattern overlapping the second ground pattern. The fourth pattern structure includes a fourth ground pattern overlapping the second line pattern. Therefore, the PCB may decrease noise.
Abstract:
A system and/or method for sensing the presence of moisture (e.g., rain) and/or other material(s) on a window such as a vehicle window (e.g., vehicle windshield, sunroof or backlite). In certain example embodiments, a plurality of sensing capacitors are supported by a window such as a vehicle windshield, the capacitors each having a different field and/or pattern. A sensing circuit outputs an analog signal that is based on and/or related to the capacitances of one or more of the sensing capacitors. In certain example embodiments, a flexible printed circuit board (PCB) mountable in or on a vehicle window is provided. First and second sensing circuits are formed on opposing sides of the flexible PCB, with each said sensing circuit comprising a plurality of different fractal structures. A ground plane is located between the first and second sensing circuits, with the ground plane being arranged so as to decouple the first and second capacitor arrays and to shield the first capacitor array from fields emanating from the second capacitor array and vice versa. The electronic device is configured to detect moisture on an exterior surface of the vehicle window, humidity on an interior surface of the vehicle window, and EMI.
Abstract:
A printed circuit board ("PCB") includes a first pattern structure, a second pattern structure, a third pattern structure, and a fourth pattern structure. The first pattern structure includes a first ground pattern. The second pattern structure includes a first line pattern overlapping the first ground pattern and a second ground pattern electrically insulated from the first line pattern. The third pattern structure includes a third ground pattern overlapping the first line pattern and a second line pattern overlapping the second ground pattern. The fourth pattern structure includes a fourth ground pattern overlapping the second line pattern. Therefore, the PCB may decrease noise.
Abstract:
A hybrid assembly having improved cross talk characteristics comprises a substrate (101) having an upper surface (111). Conductive paths on the upper surface are provided for conducting high frequency signals. Regular polygons (501, 503) made of an electromagnetic band gap (EBG) material having slow wave characteristics are 5 deposited on the upper surface and form a lattice for tessellating the upper surface. Each of the polygons has a periphery. The polygons are separated along their periphery from adjacent polygons by an interspace and are covered with an insulating material. Second polygons (804,808), also made of an electromagnetic band gap material, are deposited over the insulating material. Vias (828) connect second polygons 10 to ground plane(307). Semiconductor structures (404,406) are mounted over the second polygons. The semiconductor structures have a plurality of electrical contacts with the conductive paths. The regular polygons can be hexagons, triangles, octagons or any other combination that forms a lattice and can be printed onto the substrate.
Abstract:
A high frequency multiplayer integrated circuit is provided with: a multiplayer board (1) including n earth conductor layers (6a, 6b, 6c) (n: integer of two or more than two) and (n-1) dielectric layers (7a, 7b) each arranged between adjacent earth conductor layers (6a, 6b, 6c); a first high frequency circuit (8a) disposed in one of the most outside earth conductor layers (6c) of the multiplayer board (1); a first power-supply/control circuit (9a) disposed in this most outside earth conductor layer (6c); a second high frequency circuit (8b) disposed in at least one of the dielectric layers (7a, 7b) and connected to the first high frequency circuit (8a) in the multiplayer board (1); a second power-supply/control circuit (9b) disposed in another one of the most outside earth conductor layers (6c) of the multiplayer board; and a third power-supply/control circuit (8c) disposed in at least one of the dielectric layers (7a, 7b) at a portion at which the second high frequency circuit does not exist (8b), the third power-supply/control circuit (9c) being connected to the first and second power-supply/control circuits (9a, 9b).
Abstract:
In a fitting region for a SAW filter which includes langasite as its piezoelectric element, there are included an input side terminal electrode and an output side terminal electrode which are connected to an input terminal and to an output terminal of the SAW filter. To each of the terminal electrodes, at a position which is separated by just a predetermined distance from the fitting region of the SAW filter, there is connected a micro strip line which extends in mutually opposite directions along a direction which is parallel to the transmission direction of a frequency signal within the SAW filter. A slit is provided in the fitting region of the SAW filter and extends in a direction which intersects the transmission direction of the frequency signal within the SAW filter. A plurality of through holes are provided in the printed substrate and electrically connect together its surface and its rear surface which is grounded. Furthermore, there is provided a protective member which has a conductive surface and which is in contact with the surface of said filter, and said conductive surface of said protective member which is in contact with the surface of said filter is set so as to be of the same size as the surface of said filter, or so as to be smaller than it.
Abstract:
The invention relates to electronics and can be used in constructions of electronic units performing the reception and processing of signals of the satellite radio navigation systems (SRNS). The essence of the invention consists in that in a electronic unit comprising a multilayer printed-circuit card, the conductors intended for screening the corresponding linking signal conductor are disposed at both its and are connected with the ground planes by means of metallized holes of interface connections made at least at the beginning and end of each screening wire to form a closed electric circuit.
Abstract:
A multi-layer printed circuit board is constructed to suppress radio frequency interference (RFI) generated by high frequency clock and data signals therein. Suppression is achieved by positioning clock lines (254) carrying the clock signal on a first voltage reference layer (152) proximate to a second voltage reference layer (154). The two layers shield the clock signal from the signal lines on other layers. Noise may be further reduced by forming bridges (270) in the second voltage reference layer (154) proximate to the clock lines so that the bridges (270) span the width of the clock line. Capacitors are also preferably utilized to further suppress radiated noise. The capacitors provide AC coupling between the first and second voltage reference layers (152, 154) so that a low impedance path is provided for high frequency noise generated by the clock signal. The second voltage reference layer (154) thus operates as an effectively continuous shield between the bridges (270).