Technique for suppressing spurious resonances in strip transmiss

Details Technique for suppressing spurious resonances in strip transmiss Technique for suppressing spurious resonances in strip transmiss

1979-06-06

1980-11-11

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333238, H01P 1203, H01P 308

Patent

active

042335795

ABSTRACT:
The present invention relates to a technique for displacing spurious resonances which are excited in strip transmission line circuits outside the frequency band of interest. Such displacement is accomplished by adding apertures in the capacitive elements of the strip transmission line circuit which have dimensions to move the transverse resonances out of frequency band of interest while causing, for example, no significant change in the passband ripple or the stopband attenuation of a filter. The slots effectively cause the inductance across the capacitive element to increase and, therefore, lower the frequency of the transverse modes or resonances.

REFERENCES:
patent: 2411555 (1946-11-01), Rogers
patent: 2558748 (1951-07-01), Haeff
patent: 2915716 (1959-12-01), Hattersley
patent: 2922968 (1960-01-01), Van Patten
patent: 3095548 (1963-06-01), Manwaring
patent: 3189852 (1965-06-01), Tsuchiya
patent: 3281725 (1966-10-01), Albsmeier
patent: 3879690 (1975-04-01), Golant et al.
patent: 4138684 (1979-02-01), Kerr

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