Device for the filtering of electromagnetic waves propagating in

Details Device for the filtering of electromagnetic waves propagating in Device for the filtering of electromagnetic waves propagating in

1992-06-25

1994-05-03

Nelli, Raymond A.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333 21R, 333 21A, 333126, 333135, H01P 120

Patent

active

053091280

ABSTRACT:
A device for the filtering of electromagnetic waves propagating in a main rotational symmetrical waveguide element comprising at least one filtering section constituted of a rectangular waveguide section inserted in being spliced into the main waveguide element, each transition between said main waveguide element and each of said filtering sections being made by metal walls which are substantially perpendicular to said axis of symmetry, the number and the geometrical and dimensional characteristics of the filtering sections being chosen so as to constitute a filter with a pre-determined filtering profile. The device can be applied especially in dual band filtering, for example for the making of dual band or bi-polarization duplexers.

REFERENCES:
patent: 2719274 (1955-09-01), Luhrs
patent: 4724408 (1988-02-01), Igarashi
patent: 4725795 (1988-02-01), Ajioka et al.
patent: 4780694 (1988-10-01), Kich et al.
patent: 4881051 (1989-11-01), Tang et al.
patent: 4906951 (1990-03-01), Moeller
patent: 4920351 (1990-04-01), Bartlett et al.
patent: 5184098 (1993-02-01), Kich et al.
B. Ladanyi-Turoczy, "Design of a Superelliptic Waveguide Polarizer", Conference Proceedings, 16th European Microwave Conference, Dublin, Ireland, Sep. 1986, pp. 441-446.

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