Planar multi-resonator bandpass filter
AssigneeCom Dev Ltd.
InventorRaafat R. Mansour
Life of this patent
Estimating the term…
Abstract
A microwave bandpass filter has a planar configuration formed in microstrip or stripline where a circuit is printed onto a substrate. The filter has at least two patch resonators with a T-shaped coupling path extending between the two resonators. In a further embodiment of the invention, one or more resonators is isolated from other resonators in the filter by being located in a compartmentalized housing or separate housings to eliminate undesirable coupling between a resonator in one compartment and a resonator in another compartment. The filter of the present invention has improved performance characteristics over previous patch resonator filters.
Claims56
A bandpass filter comprising:
- (a) a plurality of patch resonators in a planar configuration, each resonator having a respective periphery with a corresponding perturbation means thereon;
- (b) a first coupling path extending between two of said resonators, at least two of said resonators being at least dual mode resonators, said first coupling path having two ends, said first coupling path having a respective longitudinal axis in each area of said ends that extends through said ends and is substantially perpendicular to an adjacent section of said periphery of the corresponding resonator, said ends each having a respective end portion thereon, each respective end portion being substantially perpendicular to said corresponding longitudinal axis, each respective end portion being substantially parallel to and spaced apart from an adjacent section of said periphery of the corresponding resonator, said filter having a housing and an input and an output.
A bandpass filter comprising a plurality of patch resonators arranged in a planar configuration, each resonator having a respective periphery with corresponding perturbation means located thereon, each resonator being mounted in a housing, with separation means being located between a first resonator and a second resonator of said plurality of resonators to prevent undesirable coupling between said first and second resonators of said plurality of resonators, said separation means being a barrier, at least two of said resonators being at least dual mode resonators, said resonators being part of a circuit extending between an input and an output of said filter.
A band pass filter comprising:
- (a) a plurality of patch resonators in a planar configuration, each resonator having a respective periphery with a corresponding perturbation means thereon;
- (b) a first coupling path extending between two of said resonators, said first coupling path having two ends, said first coupling path having a respective longitudinal axis in each area of said ends that extends through said ends and is substantially perpendicular to an adjacent section of said periphery of the corresponding resonator, said ends each having a respective end portion thereon, each respective end portion comprising a T-shape that is respectively symmetrical about said corresponding longitudinal axis, each respective end portion being substantially parallel to and spaced apart from an adjacent section of said periphery of the corresponding resonator, said filter having a housing and an input and an output.
A bandpass filter comprising a plurality of patch resonators arranged in a planar configuration, each resonator having a periphery with a perturbation means located thereon, each resonator being mounted in a housing, with separation means being located between a first resonator and a second resonator of said plurality of resonators to prevent undesirable coupling between said first and second resonators, said resonators being part of a circuit extending between an input and an output of said filter, said filter being a microstrip filter and said circuit being printed on a substrate with a metallization layer being affixed to a bottom surface of said substrate, there being one housing and said separation means being a septa, said septa having an aperture to accommodate a coupling path extending between a plurality of resonators on either side of the septa.
Dependencies are inferred from the claim text.