Calibration of active phased array system using beamforming RFIC built-in-test equipment

US11322837B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Marc Tiebout · Birkenfeld, DE
• Daniele Dal Maistro · Villach, AT
• Ivan Tsvelykh · Munich, DE
• Samo Vehovc · Unterhaching, DE
• Peter Pfann · Munich, DE

Key dates

• Filing date: Feb 24, 2020
• Grant date: May 3, 2022
• Expiry date: Nov 6, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B17/26
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A calibration method for a phased array system comprises sequentially injecting a tone into a first plurality of antenna elements of an antenna array, receiving the tone by a second plurality of antenna elements of the antenna array through parasitic coupling between the first plurality of antenna elements and the second plurality of antenna elements, measuring a plurality of phase errors between the first plurality of antenna elements and the second plurality of antenna elements, populating a lookup table with the plurality of phase errors, and calibrating a plurality of phase shifters associated with a plurality of channels in the phased array system using the plurality of phase errors in the lookup table.