Internal transmission line filter element

Details Internal transmission line filter element Internal transmission line filter element

1986-06-27

1989-10-10

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333208, 333222, 333246, H01P 1203, H01P 1207, H01P 708

Patent

active

048735019

ABSTRACT:
An improved transmission line filter element allows a higher difference between even and odd mode impedances than previously obtainable from planar structures. The filter element comprises a U-shaped gap formed in the strip conductor of a strip line transmission line, a microstrip structure or a suspended strip line structure. The internal transmission line filters can be cascaded to produce electromagnetic energy filters with deeper notches and steeper skirts than previously obtainable from other planar structures with the same number of elements.

REFERENCES:
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patent: 3688225 (1972-08-01), Cohn
patent: 3718874 (1973-02-01), Cooper, Jr.
patent: 3754198 (1973-08-01), Anghel
patent: 3914713 (1975-10-01), Konishi et al.
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patent: 4313095 (1982-01-01), Jean-Frederic
patent: 4313097 (1982-01-01), de Ronde
Bates et al., "Finline for Microwave Integrated Circuits (MICs) at Ka-BAND 27-40 GHz)", Philips Res. Lab. (Redhill) Annu. Rev. (1978); pp. 67-68.
Konishi et al.-"New Microwave Components with Mounted Planar Circuit in Waveguide", NHK Laboratories Note, Serial No. 163, Mar. 1973; pp. 1 and 3-12.
Konishi et al.-"Microwave Filter with Mounted Planar Circuit in Waveguide", NHK Laboratores Note, Serial No. 162, Mar. 1973; pp. 1 and 3-12.

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