Abstract:
Various embodiments of millimeter-wave systems on a printed circuit board, including a microstrip, a probe, and an RF integrated circuit, as well as methods for manufacturing said systems. Various embodiments have holes extending through lamina in the PCB, thereby improving radiation propagation. Various embodiments have conductive cages created by multiple through-holes extending through lamina in the PCB, thereby increasing radiation propagation. The manufacture of such systems is easier and less expensive than the manufacture of current systems.
Abstract:
A multi-layer printed circuit board has a number of landing pads that are configured to engage a connector secured thereto. Between the landing pads associated with different signals is at least one micro via that is electrically connected to a ground plane on an outer surface of the multi-layer printed circuit board, and a ground plane on an inner layer of the multi-layer printed circuit board.
Abstract:
A connector and circuit board assembly includes terminals in a connector that are mounted to vias in a circuit board. Signal and ground terminals are thus coupled to signal traces and ground planes in the circuit board. Additional pinning vias that are aligned with the ground vias may be provided in a circuit board to help improve electrical performance at the interface between the terminals in the connector and the signal traces in the circuit board. A signal collar may allow pairs of signal traces to be split and routed around two difference sides of a via before rejoining while maintaining close electrical proximity that provides for relatively consistent electrical coupling between the traces in the pair of signal traces.
Abstract:
Space transformer connectors for coupling printed circuit boards and/or other electrical connections are disclosed. A scalar design of a multilayer space transformer connector allows for a variety of pad-array field connections. A conductive elastomer interface provides for repeated and consistent coupling and decoupling of the space transformer connector.
Abstract:
A method for fabricating the hermetic electrical feedthrough. The method comprises providing a ceramic sheet having an upper surface and a lower surface, forming at least one via hole in said ceramic sheet extending from said upper surface to said lower surface, inserting a conductive thickfilm paste into said via hole, laminating the ceramic sheet with paste filled via hole between an upper ceramic sheet and a lower ceramic sheet to form a laminated ceramic substrate, firing the laminated ceramic substrate to a temperature to sinter the laminated ceramic substrate and cause the paste filled via hole to form metalized via and cause the laminated ceramic substrate to form a hermetic seal around said metalized via, and removing the upper ceramic sheet and the lower ceramic sheet material from the fired laminated ceramic substrate to expose an upper and a lower surface of the metalized via.
Abstract:
Disclosed is an arrangement in which the inner walls of the holes of a printed circuit board are incorporated into the electromagnetic shield in order to allow heat exchanging media to penetrate therethrough.
Abstract:
The invention provides a circuit board for prototyping having a grid of pads, each pad including a non- conductive substrate defining an aperture or through-hole for receiving a wire or a lead of a component, and a conductive area that encloses the aperture, and a trace that electrically connects the pad to an adjacent pad, with the conductive area that encloses the aperture being spaced away from the aperture so as to define a surrounding, intermediate non-conductive zone between the aperture and the conductive area . The invention also provides a method of manufacturing said circuit board.
Abstract:
The invention provides a circuit board having a plurality of pads, each pad including a non-conductive substrate defining an aperture for receiving a wire or a lead of a component, and a conductive area that encloses the aperture, and a trace that electrically connects the pad to an adjacent pad, with the conductive area that encloses the aperture being spaced away from the aperture so as to define a surrounding, intermediate non-conductive zone between the aperture and the conductive area. The invention also provides a method of manufacturing said circuit board.
Abstract:
A hybrid electromagnetic bandgap (EBG) structure for broadband suppression of noise on printed wiring boards includes an array of coplanar patches interconnected into a grid by series inductances, and a corresponding array of shunt LC networks connecting the coplanar patches to a second conductive plane. This combination of series inductances and shunt resonant vias lowers the cutoff frequency for the fundamental stopband. The series inductances and shunt capacitances may be implemented using surface mount component technology, or printed traces. Patches may also be interconnected by coplanar coupled transmission lines. The even and odd mode impedances of the coupled lines may be increased by forming slots in the second conductive plane disposed opposite to the transmission line, lowering the cutoff frequency and increasing the bandwidth of the fundamental stopband. Coplanar EBG structures may be integrated into power distribution networks of printed wiring boards for broadband suppression of electromagnetic noise.