Abstract:
An antenna system including a signal source, at least one antenna coupled to the signal source, a matching circuit connected to the signal source at a first port and to the at least one antenna at a second port and operative to match the at least one antenna to the signal source, the matching circuit having a characteristic impedance with respect to the first port and the second port, real and imaginary parts of the characteristic impedance not being defined by the Hilbert transform.
Abstract:
A capacitance is formed between a ground electrode (109) disposed on a ground electrode forming layer (101) and each of capacitor electrodes (111) to (115) formed on a capacitor electrode forming layer (102). A plurality of inductor electrodes are formed by via electrodes (131) to (140) and the line electrodes (116) to (120). Planes of loops of the plurality of inductor electrodes partially overlap with each other when viewed in a direction in which the inductor electrodes are arranged. In addition, the direction of the loop of the inductor electrode of an LC parallel resonator on an input side (in a first stage) is opposite to the direction of the loop of the inductor electrode of a second-stage LC parallel resonator adjacent to the inductor electrode of the LC parallel resonator on the input side. The direction of the loop of the inductor electrode of an LC parallel resonator on an output side (in a fifth stage) is opposite to the direction of the loop of the inductor electrode of a fourth-stage LC parallel resonator adjacent to the inductor electrode of the LC parallel resonator on the output side.
Abstract:
The present invention realizes a noise suppression circuit capable of suppressing noise in a wide frequency range even if impedance fluctuates on the input side or the output side. A noise suppression circuit has first and second inductors (L1, L2) inserted in series in a first conductive line (3), and a series circuit (15) configured to have a third inductor (L3) and a first capacitor (C1) connected in series. The third inductor (L3) side is connected between the first and second inductors (L1, L2). The noise suppression circuit further includes a second capacitor (C2) whose one end is connected to the first conductive line (3) on the first inductor (L1) side and whose other end is connected between the third inductor and the first capacitor in the series circuit (15).
Abstract:
A common mode signal suppressing circuit comprises: a first winding (11) inserted to a conductor line (3); a second winding (12) that is inserted to a conductor line (4) and coupled to the first winding (11) through a magnetic core (10) and that suppresses common mode signals in cooperation with the first winding (11); and a third winding (13) coupled to the first and second windings (11, 12) through the core (10). The common mode signal suppressing circuit further comprises a phase-inverted signal transmitting circuit (15) connected to the third winding (13) and to the conductor lines (3, 4). The phase-inverted signal transmitting circuit (15) detects a common mode signal on the conductor lines (3, 4), and supplies a phase-inverted signal to the third winding (13), the phase-inverted signal having a phase opposite to the phase of the common mode signal.
Abstract:
Eine Schaltung zur Filterung eines Hochfrequenzsignals, insbesondere in Tunern für Fernsehgeräte, umfaßt einen VCO (6) sowie Tracking-Filter (2, 3, 4), deren Filterbereich von einem Stellsignal (C0) verschiebbar ist. Zum Feinabgleich von Fertigungstoleranzen wird den Filtern (2, 3, 4) ein Korrektursignal (Cl, C2, C3) zugeführt, das am frequenzveränderbaren Element des Filters (2, 3, 4) an dem im Vergleich zum Steuersignal (C0) anderen Pol angelegt wird. Der Wertebereich der Korrektursignale (C1, C2, C3) ist auf den Korrekturbereich beschränkt und ist wesentlich geringer als der Wertebereich für das Stellsignal (C0).
Abstract:
A multilayer hybrid circuit having a laminated body having at least one of a plurality of dielectric layers, dielectric magnetic layers, and conductive patterns on said dielectric layers and said magnetic layers, is produced through printing process and sintering process, and composes capacitors, inductors, and resistors. An external connection is effected by side terminals positioned on side walls of the laminated body. A coupling conductor which is perpendicular to a dielectric plane is provided for coupling elements on different planes. Said coupling conductor is a succession of essentially S-shaped conductor chips or lines with the ends connected to adjacent conductor chips on different planes. That coupling conductor functions via a through hole conductor in a prior printed circuit board, and has high operational reliability in a component which is produced through sintering process. In one embodiment, an inductor is produced by a pair of coils connected in series with each other to reduce the thickness of the laminated body while providing high inductance.
Abstract:
A multilayer hybrid circuit having a laminated body having at least one of a plurality of dielectric layers, dielectric magnetic layers, and conductive patterns on said dielectric layers and said magnetic layers, is produced through printing process and sintering process, and composes capacitors, inductors, and resistors. An external connection is effected by side terminals positioned on side walls of the laminated body. A coupling conductor which is perpendicular to a dielectric plane is provided for coupling elements on different planes. Said coupling conductor is a succession of essentially S-shaped conductor chips or lines with the ends connected to adjacent conductor chips on different planes. That coupling conductor functions via a through hole conductor in a prior printed circuit board, and has high operational reliability in a component which is produced through sintering process. In one embodiment, an inductor is produced by a pair of coils connected in series with each other to reduce the thickness of the laminated body while providing high inductance.