Dual mode superconducting planar filters based on slotted square resonators

Author

Cassinese, A. ; Andreone, A. ; Barra, M. ; Granata, C. ; Orgiani, P. ; Palomba, F. ; Panariello, G. ; Pica, G. ; Schettino, F.

Author_Institution

Naples Univ., Italy

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

473

Lastpage

476

Abstract

A new kind of dual-mode filter based on cross and transverse slotted square resonators is presented. A pair of unequal crossed slots formed on a square patch resonator provides both a reduction of the filter size and a simple and controllable way to couple the two degenerate modes. Transverse cuts opportunely realized on the patch further decrease the operating frequency without any appreciable change in the power handling capability of the device. Three examples of single stage filters operating in C-band with 1% and 10% fractional bandwidth are designed with a commercial 2.5D software and fabricated using Nb and YBa₂Cu₃O₇ films grown on LaAlO₃ (100) substrates. The filters response is characterized at different temperatures and the insurgence of non-linearity investigated varying the input power and carrying out intermodulation measurements

Keywords

barium compounds; high-temperature superconductors; microwave filters; niobium; resonator filters; superconducting filters; superconducting microwave devices; superconducting resonators; superconducting thin films; yttrium compounds; 2.5D software; C-band; CAD; LaAlO₃(100) substrate; Nb; Nb film; YBa₂Cu₃O₇; YBa₂Cu₃O₇ film; dual-mode superconducting planar filter; intermodulation; nonlinearity; power handling; slotted square patch resonator; Bandwidth; Frequency; High temperature superconductors; Microwave filters; Resonator filters; Size control; Superconducting films; Superconducting filters; Superconducting microwave devices; Surface resistance;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919385

Filename

919385