Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1994-01-27
1996-06-11
Lee, Benny T.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
3332191, 333235, H01P 120
Patent
active
055259456
ABSTRACT:
A notch filter includes a directional coupler (16) with an input port (17a), coupled output port (17b), coupled 0.degree. (17d) and direct 90.degree. (17c) ports. A cylindrical dielectric resonator (40) is supported by a spacer (58) above a ground plane (14) and dielectric substrate (12). A first microstrip transmission line includes a strip conductor (22) coupled at one end to the coupled 0.degree. port, and extending parallel to a tangent to the edge of the resonator at a central plane (44), terminating in an open-circuit (226). A second transmission line includes a strip conductor (24) coupled to the direct 90.degree. port (17c) and extending parallel to the first transmission line, on the other side of the resonator. The first and second transmission lines each have an electrical length .lambda./4 between the central plane (44) and their open-circuit terminations, to reflect a high current to the plane. The high current represents maximum transmission line current, for maximizing coupling to the resonator. An offset metal plunger generates a higher-order mode, which is combined with the fundamental to improve rejection at the notch.
REFERENCES:
patent: 2749523 (1956-06-01), Dishal
patent: 3142028 (1964-07-01), Wanselow
patent: 3882434 (1975-05-01), Levy
patent: 3899759 (1975-08-01), Hines et al.
patent: 3919673 (1975-11-01), Kostelnick
patent: 4218666 (1980-08-01), Snyder
patent: 4543543 (1985-09-01), Blight et al.
patent: 4945324 (1990-07-01), Murakami et al.
patent: 4983936 (1991-01-01), Murakami et al.
patent: 4998080 (1991-03-01), Hanna
Instruction Sheet Jerrold Model 3880 Solid State High Output VHF Broadband Amplifier, #435-674-03, published by Jerrold Electronics Corporation Apr. 1973.
Chiappetta Mark C.
Daukas John S.
Berard C. A.
Bettendorf Justin P.
Lee Benny T.
Martin Marietta Corp.
Meise W, H.
LandOfFree
Dielectric resonator notch filter with a quadrature directional does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dielectric resonator notch filter with a quadrature directional , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectric resonator notch filter with a quadrature directional will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-354721