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).
Abstract:
A multilayered printed wiring board, a multilayer PWB, and a method for manufacturing the same. The multilayer PWB comprises a first main surface (201) and an opposing second main surface (202), where the multilayer PWB has a height (h) being defined, by the distance from the first main surface to the opposing second main surface. The two surfaces and the height together define the thickness of the multilayer PWB. The multilayer PWB comprises a reference ground plane, a microstrip conductor (210) separated from the reference ground plane (230') by a first dielectric layer (250) and a stripline conductor (220) connected with the microstrip conductor and being separated from the reference ground plane (230' ') by a second dielectric layer (260). The reference ground plane is formed by two or more different partial reference (230',230' ') ground planes positioned at different layers of the multilayer PWB. Furthermore, the reference ground plane is moveable from the first partial reference ground plane to the second partial reference ground plane when a signal current transits from the microstrip conductor to the stripline conductor, and vice versa.
Abstract:
In a high-frequency module, intermediate ground electrodes (Go1, Gm1, Gg1, Go2, Gm2, Gg2) are provided between a common ground electrode (Gd) and upper-surface ground electrodes (Gq1, Gq2,) for mounting high-frequency components (21, 22) on an upper surface of a multilayer substrate. With regard to the number of via-hole conductors interconnecting ground electrodes, the number of via-hole conductors (Vdg) between the intermediate ground electrodes (Go1, Gm1, Gg1, Go2, Gm2, Gg2) and the common ground electrode (Gg) is larger than the number of via-hole conductors (Voq) between the upper-surface ground electrodes (Gq1, Gq2) and the intermediate ground electrodes (Go1, Gm1, Gg1, Go2, Gm2, Gg2).
Abstract:
In a coupling adjusting structure for a double-tuned circuit according to the present invention, first and second coils are configured such that a pair of first conductive patterns formed on a first surface of a printed circuit and a corresponding pair of second conductive patterns formed on a second surface of the printed circuit board are connected via corresponding connecting conductors, thereby making the first and second coils low and thin. Also, one end of the first coil and the corresponding end of the second coil are disposed close to each other, a first ground conductive pattern is disposed at least on the first surface of the printed circuit, and a first jumper connected to the first ground conductive pattern is disposed between the first and second coils so as to adjust an inductive coupling of the double-tuned circuit, thereby achieving a coupling adjusting structure for a double-tuned circuit whose inductive coupling is adjustable.
Abstract:
There is provided a transmission circuit using a strip line which can be formed in three dimensions with simple construction and low cost and which has high reliability. A first microstrip line is formed by sandwiching a dielectric substrate 1 between a first strip conductor 2 provided on a top surface of the dielectric substrate 1 and a first grounding conductor 3 provided on a bottom surface of the dielectric substrate 1. A second microstrip line is formed by sandwiching the dielectric substrate 1 between a second strip conductor 4 provided on the bottom surface of the dielectric substrate 1 and a second grounding conductor 5 provided on the top surface of the dielectric substrate 1. The first strip conductor 2 and the second strip conductor 4 are electrically connected to each other by a connecting through hole 11 provided in the dielectric substrate 1.
Abstract:
An insulative magnetic layer is disposed between a power source conductor layer and a ground conductor layer of a printed-wiring board. Two pieces of conductors are formed by cutting out a part of the power source conductor layer. Another two pieces of conductors are formed by cutting out a part of the ground conductor layer. The former conductors and the latter conductors are connected by five viaholes. A spiral coil inductor of a spiral form is formed in this way. This inductor has the strengthened inductance owing to the insulative magnetic layer provided therein.