Compact edge coupled filter

Details Compact edge coupled filter Compact edge coupled filter

2002-05-29

2004-07-13

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S161000, C333S202000

Reexamination Certificate

active

06762660

ABSTRACT:

BACKGROUND OF THE DISCLOSURE
Filters with parallel-coupled resonators in microstrip or strip-line are known in the art, e.g.,
Microwave Filters, Impedance
-
Matching Networks, and Coupling Structures
, George I. Matthaei et al., Artech House, 1980, at Section 8.09, pages 472-477. An exemplary parallel-coupled resonator filter
10
is shown in FIG.
1
. The filter includes a dielectric substrate having opposed planar surfaces, with a ground plane layer on a bottom surface, and input/output (I/O) ports
14
,
16
. A conductor strip
14
A is formed on the upper surface of the substrate to connect to the I/O port
14
. A conductor strip
16
A is formed on the upper surface of the substrate to connect to the I/O port
16
. Microwave energy is coupled between the I/O ports by a series of conductive strips
18
-
1
,
18
-
2
. . .
18
-
7
defining a series of spaced resonators on the upper surface. The resonators are staggered along a diagonal
20
.
The parallel-coupled resonator filter is often placed in a channel in a conductive housing structure, in which unwanted waveguide modes can propagate due to the relatively large channel width needed to accommodate the width of the filter.
SUMMARY OF THE DISCLOSURE
A band pass filter circuit for microwave frequencies is described, comprising a plurality of parallel-coupled resonators formed in a planar transmission line medium, including coupling between alternate resonators in the form of transmission line gaps.


REFERENCES:
patent: 4020428 (1977-04-01), Friend
patent: 4560964 (1985-12-01), Meier
patent: 4701727 (1987-10-01), Wong
patent: 5015976 (1991-05-01), Saka
patent: 5404119 (1995-04-01), Kim
patent: 5616538 (1997-04-01), Hey-Shipton et al.
patent: 5770546 (1998-06-01), Grothe et al.
patent: 5949311 (1999-09-01), Weiss et al.
patent: 6094588 (2000-07-01), Adam
“Microwave Filters, Impedance-Matching Networks, and Coupling Structures,” by George L. Matthael et al, Artech House, 1980, Section 8.09, pp. 472-477.

Affiliated with

Also associated with

Rating

Compact edge coupled filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compact edge coupled filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact edge coupled filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3259193