Delay line for providing a delay time at a desired peak frequenc

Details Delay line for providing a delay time at a desired peak frequenc Delay line for providing a delay time at a desired peak frequenc

1997-07-07

1999-11-23

Lee, Benny

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

H01P 118

Patent

active

059907606

ABSTRACT:
A stripline-type delay line has a plurality of rectangular sheet layers which are made from a dielectric material with a relative dielectric constant .di-elect cons.r of about 6.3, having magnesium oxide and silica as main components. One sheet layer is placed at the top, and the other layers are laminated thereunder in the following order: a sheet layer on which a first ground conductor is formed on its upper surface, a sheet layer on which a transmission line folded in a meander shape is formed on its upper surface, and a sheet layer on which a second ground conductor is formed on its upper surface. On side faces of the laminated dielectric and on adjacent portions of the upper and lower surfaces, an input terminal, an output terminal, and ground terminals are formed by printing, and then the dielectric is baked. The length A of the opposing line sections of said transmission line is preferably set such that the first peak frequency f of the delay time is within or above the frequency range of use, and substantially satisfies the following expression: ##EQU1## wherein Co indicates the speed of light, and .di-elect cons.r indicates the relative dielectric constant of said dielectric layers.

REFERENCES:
patent: 5073755 (1991-12-01), Neufeld
patent: 5146191 (1992-09-01), Mandai et al.
patent: 5187455 (1993-02-01), Mandai et al.
patent: 5365203 (1994-11-01), Nakamura et al.
Y. Nagai, et al., "Non-dispersive and Dispersive Delay Lines Using High-Tc Superconducting Films", IEICE Transactions on Electronics, E75-C (1992), Aug. No., 8, Tokyo, JP.
Hansson, et al., "Planar Meanderline Ferrite-Dielectric Phase Shifter", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-29 (1981) Mar., No. 3, New York, USA.

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