Abstract:
In accordance with a first embodiment, the present invention provides a circuit substrate comprising a first surface; a second surface; a first via having a first end near said first surface and a second end near said second surface; a second via having a first end near said first surface and a second end near said second surface; a first conductive element electrically coupling said first end of said first via and said first end of said second via; a second conductive element electrically coupling said second end of said first via and said second end of said second via; an input signal line coupled to said first via; and an output signal line coupled to said second via.
Abstract:
A transition circuit board (100) for transitioning a cable to a connector is provided. A circuit board has an outer surface (104) with a circuit trace (106), ground plane (120) and ground link (118) provided thereon. A cable pad (114) and a contact pad (116) are provided at opposite ends of the circuit trace. The ground link is electrically common with the ground plane and is located adjacent to, and separated by a space from, the circuit trace. An insulating coating (168) is provided over at least part of the circuit trace, the ground plane and the outer surface of the circuit board. The insulating coating has a mask aperture there-through exposing an uncoated portion of the circuit trace and the ground link. A conductive jumper material is provided on the uncoated portion of the circuit trace and the ground link to electrically join the circuit trace with the ground plane.
Abstract:
A high frequency module having a high frequency circuit part (3) formed on a base substrate part (2). The high frequency circuit part (3) having a multilayer wiring layer, each having a wiring pattern or a filming element formed on a dielectric insulation layer, where a large number of lands (22) and a ground pattern (20) are formed on the uppermost wiring layer (17) along with a wiring pattern and an inductor element (19), and a semiconductor chip (4) being mounted on the wiring layer (17) at the high frequency circuit part (3) are provided on a planarized buildup forming plane (16) at the base substrate part (2). A transmission line (24) formed in the wiring layer (17) and connecting between the inductor element (19) and specified lands (22) is led through a punched pattern region (20c) formed in the ground pattern (20), thus constituting a coplanar transmission line.
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).
Abstract:
Embodiments of a system are disclosed. In an embodiment, a system includes conductive textile portions and non-conductive textile portions. The conductive textile portions have conductive fibers and the non-conductive textile portions have non-conductive fibers. The conductive textile portions are connected to the non-conductive textile portions in the form of a coplanar antenna system.
Abstract:
Dispositif d'interconnexion (100) de circuits électroniques, notamment de circuits électroniques hyperfréquence, caractérisé en ce qu'il comprend au moins une ligne de transmission (103) couplée à une ligne de masse (104), les deux lignes (103, 104) étant réalisées sur une face d'un substrat diélectrique (101), au moins une surface de métallisation formant sur l'autre face du substrat diélectrique (101) au moins un élément de couplage (102) disposé sur une surface sensiblement égale à la surface occupée par la ligne de transmission (103) et la ligne de masse (104), l'interconnexion se réalisant sensiblement au niveau des extrémités de la ligne de transmission (103) et de la ligne de masse (104).
Abstract:
A protective member (315) which has a surface which is coated with, for example, a conductive sheet or the like is carried upon the surface (311A) of the SAW filter (311) which has been mounted in the fitting region (313) upon the printed substrate (312). Here, within the conductive surface of the protective member (315), by surface contact with the surface (311A) of the SAW filter (311), the size of a conductive coating surface (315A) of the protective member which covers this surface (311A) is set so as to be the same as the size of the surface (311A) of the SAW filter (311), or to be smaller than the size thereof. Furthermore a shield frame member (316) which is shaped as a frame and which is made from a metal (for example from copper or the like) is provided so as to surround the periphery of the fitting region (313) for the SAW filter (311) and moreover a shield lid member (317) which is shaped as a lid and which is made from a metal (for examplefrom copper or the like) is provided so as to be sandwiched from both sides by the printed substrate (312).