Vertically-stacked filter employing a ground-aperture...

Details Vertically-stacked filter employing a ground-aperture... Vertically-stacked filter employing a ground-aperture...

2002-06-25

2004-09-28

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S204000, C333S246000

Reexamination Certificate

active

06798317

ABSTRACT:

FIELD OF THE INVENTION
The present invention generally relates to various resonating configurations of filters employing a resonator device. More specifically, the present invention relates to various topologies for filters employing a resonator device.
BACKGROUND OF THE INVENTION
Conventional strip-line filters known in the art employ planar resonator devices.
FIG. 28
illustrates a top view of a known edge-coupled three resonator device
110
including a left resonator
111
, a middle resonator
112
, and a right resonator
113
. The resonators
111
-
113
are aligned along their edges whereby the resonators
111
and
112
are edge-coupled, and the resonators
112
and
113
are edge-coupled. The edge-couplings of the resonators
111
-
113
establish a signal path from an input port
111
a
to an output port
113
a
as indicated by the arrow.
FIG. 29
illustrates a top view of a known two resonator device
120
employed within a parallel coupled line filter. A resonator
122
and a resonator
123
are approximately &lgr;/2 long. An input line
121
is edge-coupled to the resonator
122
by a gap GP1. The resonator
122
is edge-coupled to the resonator
123
by a gap GP2. Finally, the second resonator
123
is edge-coupled to an output line
124
by gap GP3. The aforementioned edge-couplings establish a signal path from the input line
121
to the output line
124
as indicated by the arrows.
One drawback of the resonator device
110
and the resonator device
120
is a failure to facilitate a fabrication of a filter employing the resonator device within a minimal substrate area. The present invention is an advancement of the prior art.
SUMMARY OF THE INVENTION
One form of the present invention is a filter comprising a plurality of metal layers and a plurality of dielectric layers arranged in a vertically stacked topology. A first metal layer includes a first resonator. A second metal layer includes a second resonator.
The filter can employ a third metal layer including an inner ground operable to broadside couple the first resonator and the second resonator.
The filter can employ a third metal layer including an inner ground having an aperture operable to couple a broadside surface of the first resonator and a broadside surface of the second resonator.
The filter can employ a pair of strip-line regions formed by the metal layers. An input port of the first resonator is isolated within a first strip-line region. An output port of the second resonator is isolated within a second strip-line region.
The foregoing forms and other forms as well as features and advantages of the present invention will become further apparent from the following detailed description of the presently preferred embodiments, read in conjunction with the accompanying drawings. The detailed description and drawings are merely illustrative of the present invention rather than limiting, the scope of the present invention being defined by the appended claims and equivalents thereof.


REFERENCES:
patent: 3451015 (1969-06-01), Heath
patent: 4701727 (1987-10-01), Wong
patent: 5093639 (1992-03-01), Franchi et al.
patent: 5311159 (1994-05-01), Miura et al.
patent: 5349314 (1994-09-01), Shimizu et al.
patent: 5374909 (1994-12-01), Hirai et al.
patent: 5691676 (1997-11-01), Snel et al.
patent: 5742210 (1998-04-01), Chaturvedi et al.
patent: 5949304 (1999-09-01), Heine et al.
patent: 6294967 (2001-09-01), Hirai et al.
patent: 6304156 (2001-10-01), Ishizaki et al.
patent: 6437665 (2002-08-01), Kato
patent: 6538534 (2003-03-01), Hirai et al.
“Multilayer Asymmetric Aperture-Coupled Broadside Microstrip Lines and Their Quasi-Static and Dynamic Analysis”: Subbarao Kunasani, Cam Nguyen, IEEE Transactions on Microwave Theory and Techniques, vol. 43, No. 12, Dec. 1995 pp. 2702-2707.
“Stripline to Microstrip Line Aperture Coupler”: G. V. Jogiraju, V. M. Pandharipande; IEEE Transactions on Microwave Theory and Techniques, vol. 38, No. 4, Apr. 1990 pp. 440-443.
“Coupled-Transmission-Line Directional Couplers”, J. K. Shimizu and E. M. T. Jones, Oct. 1958, pp. 403-410.

Affiliated with

Also associated with

Rating

Vertically-stacked filter employing a ground-aperture... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vertically-stacked filter employing a ground-aperture..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertically-stacked filter employing a ground-aperture... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3216274