Communication device and method for determining a load impedance

US10170822B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Valentyn Solomko · Munich, DE
• Anthony Thomas · Munich, DE
• Winfried Bakalski · Birkenfeld, DE
• Ruediger Bauder · Feldkirchen-Westerham, DE

Key dates

• Filing date: Jun 1, 2017
• Grant date: Jan 1, 2019
• Expiry date: Jun 1, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/04
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

According to one embodiment, a communication device is described comprising an antenna, a signal path for supplying a signal to the antenna, two directional couplers arranged within the signal path, wherein each directional coupler is coupled to an adjustable impedance defining the characteristic impedance of the directional coupler, a controller configured to set, for each of a plurality of impedances, the adjustable impedances of the directional couplers to the impedance, a return loss measurement circuit configured to determine, for each of the plurality of impedances, a return loss of the signal path when the adjustable impedances of the directional couplers are set to the impedance and a load impedance determination circuit configured to determine a load impedance of the signal path based on the determined return losses.