Abstract:
An electromagnetic band gap (EGB) structure includes a substrate made of an isolating material. A plurality of identical planar transmission line segments are formed one under another in conductor layers embedded in the substrate. Vertical transitions connect one by one the plurality of planar transmission line segments. Adjacent ones of the vertical transitions are equally spaced on a predetermined distance in a direction parallel to the transmission line segments, thereby the vertical transitions serve as periodical inclusions forming the EBG structure.
Abstract:
L'invention concerne un module électronique comprenant un substrat électronique (1), un support multicouches (2) comportant un ensemble de composants intégrés et solidaires dudit support et au moins un composant micro-onde, caractérisé en ce que le support multicouches comporte en surface au moins une couche localement évidée de manière à définir une cavité (Ca) entre le support multicouches et le substrat diélectrique, au niveau de laquelle est positionné le composant micro-onde. Avantageusement le composant micro-onde peut être constitué par une ligne pseudo-triplaque supérieure (L s1 ), définie à la surface localement évidée du support, le support pouvant être un empilement de couches céramiques.
Abstract:
A high frequency coax via structure is configured with a stripped semi-rigid cable (no shield), and an inductive compensation loop to mitigate transition discontinuity between that via structure's center conductor and the pad to which the center conductor is connected. The performance of top-to-bottom microwave transitions at high frequencies (e.g., 1 to 12 GHz) for such boards is enhanced. A non-metallized via hole embodiment that is configured with surrounding ground vias provides a greater degree of compensation for connection pads associated with greater capacitance (such as those coupled to a component).
Abstract:
Microwave signals are coupled from a microwave module to a microstrip transmission line, each installed on a chassis plate. The microwave signals are fed through the bottom or side of the microwave module using a feedthrough pin mounted in the module. The feedthrough pin extends from the microwave module interior into a channel defined in the chassis plate and to a microstrip line on the opposite side of the plate. An electrically conductive gasket is placed about the feedthrough pin between the microwave module and chassis plate to reduce signal leakage and enhance ground continuity. An insulating sleeve is installed about the feedthrough pin in the chassis plate channel and provides a nominal clearance (e.g., 0.005 inches) within that channel to allow for manufacturing and assembly tolerances and to enable feedthrough impedance to be substantially insensitive to the position of the feedthrough pin and insulating sleeve within the channel.
Abstract:
A transmission line for high-frequency differential signals and having a transforming impedance is formed into a substrate. The transmission line is comprised of a first slot, the opposing surfaces of which carry a conductive surface capable of carrying electrical signals. By virtue of their dimensions, spacing and dielectric filler, the conductive surfaces constitute a transmission line. A second slot, also with opposing surfaces, each of which also carry a conductive surface but which are spaced differently than the opposing surfaces of the first slot, provide a second transmission line but with a different impedance. The impedances between the two transmission lines are transformed by an impedance transition section of transmission line that is slot section the dimensions of which are tapered to meet the different slot dimensions of the two different transmission line segments.
Abstract:
A slot transmission line patch connector, capable of bridging one or more slot transmission lines is comprised of an elongated dielectric connector body. The dielectric connector body is formed to have one or more slot transmission lines. Each transmission line formed in the dielectric body has first and second ends, each of which mates with corresponding first and second slot transmission lines. Alternate embodiments contemplate a dielectric body to which is attached one or more slot transmission line substrates, each of which supports one or more slot transmission lines. Each of the slot transmission line substrates provide one or more slot transmission lines that each bridge or "patch" together two, separate slot transmission lines together.
Abstract:
A concentric 'conductor within a via' RF interconnect architecture, has an inner via through which at least one RF signal conductor passes. The inner conductive via is coaxially formed within and stably coaxially aligned within an outer conductive via, which serves as a coaxial ground plane that completely surrounds the inner conductive via. The outer conductive via passes through dielectric layers of microstrip or stripline structures on opposite sides of a multi printed circuit laminate.
Abstract:
A deployable radio frequency (RF) transmission line, comprising at least two members, hinged together for deployment between a folded state and an unfolded state; and at least one bridge component disposed at each inter-member junction to provide RF coupling for the transfer of RF energy between the at least two hinged members.
Abstract:
A high frequency coax via structure is configured with a stripped semi-rigid cable (no shield), and an inductive compensation loop to mitigate transition discontinuity between that via structure's center conductor and the pad to which the center conductor is connected. The performance of top-to-bottom microwave transitions at high frequencies (e.g., 1 to 12 GHz) for such boards is enhanced. A non-metallized via hole embodiment that is configured with surrounding ground vias provides a greater degree of compensation for connection pads associated with greater capacitance (such as those coupled to a component).