Interspersed double winding helical resonator with connections t

Details Interspersed double winding helical resonator with connections t Interspersed double winding helical resonator with connections t

1975-03-10

1976-02-03

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 73C, 333 82B, H01P 120, H01P 704

Patent

active

039367762

ABSTRACT:
In a helical resonator, sometimes called a coaxial resonator with helical inner conductor, new capabilities are achieved by providing a double winding with the turns interspersed and of like pitch. One pair of respective opposite ends of the two portions of the double winding is connected directly to the cavity or ground conductor of the resonator, sometimes called the shield. Coupling to the cavity is achieved by any prior coupling technique. The new resonator can be included in compound helical resonator filters as would other helical resonators. One of the principal advantages of the new helical resonator is its ability to suppress odd harmonics both in its own resonator characteristic and in the characteristics of a composite filter in which it is only one of several helical resonators.

REFERENCES:
patent: 2700129 (1955-01-01), Guanella
patent: 2826698 (1958-03-01), Mason
patent: 3090920 (1963-05-01), Levine
patent: 3538463 (1970-11-01), Pakan
patent: 3763447 (1973-10-01), Takahashi et al.
Zverev, Handbook of Filter Synthesis, John Wiley & Sons, Inc., N.Y., 1967, pp. 499-521.
IEE (Britain) Colloquim Digest No. 1973/6, New Developments in UHF Helical Filters, Lind et al.
Lind et al., Generalised Interdigital Helical Filter, Electronics Letters, Oct. 19, 1972, Vol. 8, No. 21, pp. 525, 526.

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