Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1990-12-26
1992-09-22
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333207, H01P 1202, H01P 1205
Patent
active
051500892
ABSTRACT:
A dielectric filter includes a homogeneous monolithic block of dielectric material having a plurality of parallel extending dielectric resonators formed therein. A plurality of first electrodes extend alond the top surface of the monolithic block, each encompassing an opening in the monolithic block defined by a corresponding one of the plurality of dielectric resonators. Either the distance between adjacent dielectric resonators or the configuration of the first electrodes is established to cause an overcoupling based on the coupling impedance, thereby tuning an attenuation pole of the dielectric filter to a finite frequency. Additionally, second electrodes are provided along the top surface of the monolithic block extending between and spaced from the first electrodes and connected to a ground electrode.
REFERENCES:
patent: 4716391 (1987-12-01), Moutrie et al.
patent: 4768003 (1988-08-01), Kawakami et al.
patent: 4855693 (1989-08-01), Matsukura et al.
patent: 4890079 (1989-12-01), Sasaki
patent: 4965537 (1990-10-01), Kommrusch
patent: 4987393 (1991-01-01), Yorita et al.
Gunji Katsuhiko
Komazaki Tomokazu
Mashimo Akira
Onishi Norio
Ham Seung
LaRoche Eugene R.
OKI Electric Industry Co., Ltd.
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