Micro-strip circuit for loss reduction

US6504109B1 · kind B1 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Omid Aval · Järfälla, SE
• Håkan Berg · Umeå, SE
• Spartak Gevorgian · Handen, SE
• Bertil Hansson · Partille, SE
• Harald Jacobsson · Mörbylånga, SE
• Thomas Lewin · Onsala, SE

Key dates

• Filing date: Jun 28, 2000
• Grant date: Jan 7, 2003
• Expiry date: Jun 28, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01P3/08
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A printed circuit (1) on a lossy substrate (2) has been provided whereby intermediate structures (11, 12, 17, 18) under the top layer strips (5) have been formed having a width being (d2) smaller than the width (w) of the strip. The intermediate structures (11, 12, 17, 18) are particular well suited for inductors (9) on silicon substrates and result in a considerable increase in the Q-factor of the inductor at microwave frequencies.