Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1987-09-02
1991-04-30
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333209, 333248, H01P 1208
Patent
active
050122118
ABSTRACT:
A microwave filter is composed of a set of circular cylindrical cavities arranged in cascade array and interconnected by irises having cross-slotted apertures for coupling electromagnetic power in two orthogonal TE.sub.113 modes. An input port is formed in a first of the cavities and an output port is formed in a last of the cavities. Each port is constructed as a transition between a section of rectangular waveguide and a section of circular waveguide, the section of circular waveguide being a portion of the first cavity and the last cavity, respectively, in the input and the output ports. The cross-sectional aspect ratio of the rectangular waveguide is 2:1. The ratio of a diameter of the cavity to length, as measured along a cylindrical axis in each cavity, is 0.26 thereby to provide for increased bandwidth while minimizing dispersion and transmission loss.
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Rikimaru Roy K.
Young Frederick A.
Denson-Low Wanda K.
Hughes Aircraft Company
Mitchell Steven M.
Nussbaum Marvin L.
Westerlund Robert A.
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