Filter for very short electromagnetic waves

Details Filter for very short electromagnetic waves Filter for very short electromagnetic waves

1977-11-21

1979-12-25

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333227, 333230, H01P 706, H01P 120, H01P 116

Patent

active

041807871

ABSTRACT:
A filter for very short electromagnetic waves is disclosed in which a plurality of resonators are formed in a row with each resonator containing two filter circuits. The resonators are operated in a dual mode and the filter circuits are arranged in an electrical sequential manner. First and last filter circuits in a direction of the transmitted energy are provided with input and output lines, respectively. At least one additional coupling is provided between at least two filter circuits which do not directly follow one another in electrical sequential fashion. At least one of the resonators provides two filter circuits which are not adjacent with respect to one another in electrical sequential fashion and are coupled via an additional coupling.

REFERENCES:
patent: 3697898 (1972-10-01), Blachier et al.
Lin-"Journal of Applied Physics", vol. 22, No. 8, Aug. 1951; pp. 989-1001.
Williams-"IEEE Transactions on Microwave Theory and Techniques", vol. MTT-18, No. 12, Dec. 1970; pp. 1109-1113.
Atia-"IEEE Transactions on Microwave Theory and Techniques", vol. MTT-22, No. 4, Apr. 1974; pp. 425-431.
Atia et al.-"Narrow-Bandpass Waveguide Filters", in IEEE Trans. on Microwave Theory and Techniques, vol. MTT-20, No. 4, Apr. 1972; pp. 258-265.
Rhodes et al.-In-Line Waveguide Selective Linear Phase Filters in IEEE Trans. on Microwave Theory and Techniques, vol. MTT-22, No. 1, Jan. 1974; pp. 1-5.
Atia et al.-"Non-Minimum Phase, Optimum Amplitude, Bandpass Waveguide Filters", Conference 1973, G-MTT International Microwave Symposium, Digest of Technical Papers, Boulder, Colo., U.S.A., 4-6, Jun. 1973; pp. 210-212.

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