A tapped-delay-line superconductive chirp filter in shielded microstrip

Author

Ramisch, Roland ; Olbrich, Gerhard R. ; Russer, Peter

Author_Institution

Tech. Univ. of Munich, Germany

Volume

39

Issue

9

fYear

1991

fDate

9/1/1991 12:00:00 AM

Firstpage

1575

Lastpage

1581

Abstract

A superconducting chirp filter having a dispersive time delay of 26 ns and a 3.4-GHz bandwidth centered at 4.7 GHz has been fabricated using a niobium-on-silicon shielded microstrip technology. Along a 2×1.6 m delay are, unequally spaced microstrip directional couplers ire employed as sampling devices. To achieve an improvement in dispersion and coupler directivity over conventional microstrip, the device uses a superconductive shield mounted at a distance equal to the height of the dielectric on top of the microstrip structure. Structural support of the 70-μm-thin high-resistivity dielectric is provided by a large-area bond to a glass substrate

Keywords

delay lines; directional couplers; microwave filters; passive filters; strip line components; superconducting devices; 3.4 GHz; 4.7 GHz; Nb-Si; coupler directivity; directional couplers; dispersion; glass substrate; large-area bond; sampling devices; shielded microstrip technology; superconductive chirp filter; superconductive shield; tapped-delay-line; traversal filter; Bandwidth; Chirp; Delay effects; Dielectric substrates; Directional couplers; Dispersion; Microstrip filters; Space technology; Superconducting filters; Superconductivity;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.83833

Filename

83833