Abstract:
A discrete resonator (1) is provided, including a dielectric base (2) having a dielectric constant. A metal contact (3) formed on a major surface of the dielectric base (2) has a predetermined area and is positioned at a predetermined location on the dielectric base (2) to provide a predetermined loaded Q for the resonator (1). A metal ground coating (4) is formed on the outer surface of the dielectric base (2) with the exception of an isolation region (5) surrounding the metal contact (3) that is free of the metal ground coating. The area of the isolation region (5) is sufficient to prevent significant coupling between the metal contact (3) and the metal ground coating (4). The dielectric constant of the material used for the base, and the width and length of the dielectric base (2) are each selected such that the resonator (1) resonates at least at one predetermined resonant frequency in the GHz frequency range.
Abstract:
The present invention discloses an apparatus comprising an enclosure (10) suitable for forming a vacuum therein and means for at least partially suppressing the multipacting effect when a RF or microwave electromagnetic field is generated in said vacuum. In the apparatus, the means for at least partially suppressing the multipacting effect comprises means (12) for passively generating a locally varying magnetic field (16) in the vicinity of at least a portion of the inner surface of said enclosure.
Abstract:
A variable filter element and a variable filter module suitable for decreasing the drive voltage are provided. The variable filter element includes a substrate (10), two ground lines (22) and a signal line (21) between the ground lines, where these lines are disposed to extend in parallel on the substrate. The filter element further includes movable capacitor electrodes (24) which bridge between the ground lines and have portions facing the signal line, drive electrodes (25) which are located between the signal line and the ground lines and generate electrostatic attraction with the movable capacitor electrodes, and a ground line (12a), which is disposed in the substrate, has a portion facing the signal line, and is electrically connected with the ground. The variable capacitor electrodes and the ground line constitute ground interconnection portions, and the signal line and ground interconnection portion constitute a distributed constant transmission line.
Abstract:
A signal input/output line 101 is used for input and output of a signal. A first resonating part 102 is connected to the signal input/output line 101 at one end and is opened at the other end. A second resonating part 103 is connected to a ground conductor 105 at one end and is opened at the other end. A connecting line 104 has a predetermined length and is connected to a point of connection between the signal input/output line 101 and the first resonating part 102 at one end and is connected to a predetermined point on the second resonating part 103 at the other end.
Abstract:
The present invention relates to a reflection-type bandpass filter (1) for ultra-wideband wireless data communication, in which two conductors (3, 4) extending in band form are provided on the surface of a dielectric substrate (2) at a prescribed distance, the surface of the dielectric substrate between the conductors defining a non-conducting portion (5), and in which the conductor width or the distance between conductors, or both, are distributed non-uniformly in the length direction of the conductors. Furthermore, the present invention relates to a reflection-type bandpass filter (11) for ultra-wideband wireless data communication, comprising a dielectric substrate (12), a band-shaped conductor (13) provided on the surface of the dielectric substrate, and a side conductor (15) provided on one side of the band-shaped conductor securing a prescribed distance between conductors with a non-conducting portion (14) intervening; and the band-shaped conductor width or the distance between conductors, or both, are distributed non-uniformly along the band-shaped conductor length direction.
Abstract:
Die vorliegende Erfindung betrifft ein Bauelement zur Verwendung im Hochfrequenzbereich und ein Verfahren zur Herstellung einer Photonic-Band-Gap-Struktur, welche zur Herstellung des Bauelementes auf einem Hauptsubstrat befestigbar ist, wobei das Verfahren folgende Schritte aufweist: Bilden zueinander konform ausgebildeter Koplanarwellenleiter-Metallisierungen (3; 3') auf den Flächen zweier Substrate (1; 1'); Kontaktieren der zueinander konform ausgebildeten Koplanarwellenleiter-Metallisierungen (3; 3') der beiden Substrate (1; 1'); und strukturiert Zurückätzen der beiden Substrate (1; 1') von den den Koplanarwellenleiter-Metallisierungen (3; 3') gegenüberliegenden Flächen der beiden Substrate (1; 1') her.
Abstract:
A plurality of one-quarter wavelength coplanar resonators 5a to 5d are formed in series on a dielectric substrate 1, and coplanar input/output terminal sections 4a and 4b are formed on the dielectric substrate at opposite ends of the series connection for coupling with resonators 5a and 5d, respectively. A center conductor line width w 1 of each of the resonators 5a to 5d is equal to a center conductor line width w io of each of the input/output terminal section 4a and 4b, but a ground conductor spacing d 1 of each of the resonators 5a to 5d is greater than a ground conductor spacing d io of each of input/output terminal section 4a and 4b. Maintaining the accuracy of design is facilitated and a reduction in the maximum current density in the resonator is enabled.
Abstract:
A highly compact bandpass filter that has excellent mechanical strength is disclosed. A bandpass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying between a first cross-section of the dielectric block and a second cross-section of the dielectric block substantially parallel to the first cross-section and second and third portions divided by the first portion and metal plates formed on surfaces of the dielectric block. The first portion of the dielectric block and the metal plates formed thereon are enabled to act as an evanescent waveguide. The second portion of the dielectric block and the metal plates formed thereon are enabled to act as a first resonator. The third portion of the dielectric block and the metal plates formed thereon are enabled to act as a second resonator. The metal plates include an inductive stub formed on the surface of the first portion of the dielectric block.