Processing

Please wait...

Settings

Settings

Goto Application

1. EP1302999 - FILTER

Office
European Patent Office
Application Number 01947894
Application Date 06.07.2001
Publication Number 1302999
Publication Date 16.04.2003
Publication Kind A4
IPC
H01P 1/205
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
PWAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE
1Auxiliary devices
20Frequency-selective devices, e.g. filters
201Filters for transverse electromagnetic waves
205Comb or interdigital filters; Cascaded coaxial cavities
H01P 1/208
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
PWAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE
1Auxiliary devices
20Frequency-selective devices, e.g. filters
207Hollow waveguide filters
208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
H01P 1/212
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
PWAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE
1Auxiliary devices
20Frequency-selective devices, e.g. filters
212suppressing or attenuating harmonic frequencies
CPC
H01P 1/2088
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
1Auxiliary devices
20Frequency-selective devices, e.g. filters
207Hollow waveguide filters
208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
2088Integrated in a substrate
Applicants NEC CORP
Inventors ITO MASAHARU
MARUHASHI KENICHI
OHATA KEIICHI
Designated States
Priority Data 0105894 06.07.2001 JP
2000207459 07.07.2000 JP
Title
(DE) FILTER
(EN) FILTER
(FR) FILTRE
Abstract
(EN) A dielectric waveguide tube band-pass filter assuming lower characteristic change upon mounting, and having smaller dimensions and lower loss. Conductor layers (2a, 2c) are formed on the top and bottom surfaces of a dielectric substrate (1), wherein the top conductor layer 2a and the bottom conductor layer 2c are connected together through via-holes (3a). The via-holes (3a) are formed in at least two rows along the signal transfer direction. In the dielectric waveguide tube configured by the top and bottom conductor layers (2a, 2c) and the via-holes (3a), via-holes (3b) are arranged in the signal transfer direction at spacing equal to or below 1/2 of the in-tube wavelength to thereby configure resonators. The dielectric band-pass filter is configured by coupling adjacent resonators together through the via-holes (3b) configuring inductive windows. On the surface of the dielectric substrate (1), a co-planar line (4) including the conductor layer (2) as the ground and the conductor layer (2b) as a signal conductor is configured so as to overstride the inductive windows configured by the via-holes (3a).
(FR) Des couches conductrices (2a, 2c) supérieure et inférieure sont connectées via deux rangées de trous d'interconnexion (3a) situées respectivement sur la surface avant et sur la surface arrière d'un substrat diélectrique (1). Dans un guide d'ondes diélectrique comportant lesdites couches conductrices (2a, 2c) supérieure et inférieure et les trous d'interconnexion (3a), des trous d'interconnexion (3b) sont ménagés dans la direction de propagation d'un signal à un intervalle correspondant à la moitié d'une longueur d'onde du guide ou moins, ce qui permet d'obtenir un filtre passe-bande diélectrique comportant un résonateur couplé par l'intermédiaire d'une fenêtre diélectrique. Une ligne coplanaire (4) ayant la couche conductrice (2a) en tant que mise à la terre et la couche conductrice (2b) en tant que conducteur de signaux est placée sur la surface du substrat diélectrique (1) en travers d'une fenêtre diélectrique formée par les trous d'interconnexion (3b).