Phase shifter

US10163889B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Frank Mayer · Uttenreuth, DE
• Mario Schuehler · Effeltrich, DE
• Michael Schlicht · Erlangen, DE
• Rainer Wansch · Geiselhöring, DE

Key dates

• Filing date: Sep 15, 2017
• Grant date: Dec 25, 2018
• Expiry date: Sep 15, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K1/0259
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A phase shifter includes a signal input, a signal output, an ESD protection circuit, first and second signal paths between the signal input and the signal output. The ESD protection circuit includes first and second two port devices, each two port device being switchable between a high impedance state and a low impedance state. The first signal path includes the first two port device of the ESD protection circuit and a first delay line configured to provide a first phase shift to a signal transmitted from the signal input to the signal output via the first signal path. The second signal path includes the second two port device of the ESD protection circuit and a second delay line configured to provide a second phase shift, different from the first phase shift, to the signal transmitted from the signal input to the signal output via the second signal path.