TUMA17: High Linearity GNSS Wideband LNA for Automotive Antenna

Presentation Abstract
Modern vehicles are equipped with increasing communication functions and sensors, resulting in an increase of jamming signals in the vicinity of the GNSS reception band. These jamming signals cannot always be removed by simple filters. High linearity of a GNSS Wideband LNA can help improve jamming tolerance. But there is a tradeoff - high linearity can contribute to higher current consumption. Nisshinbo added a linearity compensation circuit to our Wideband LNA to keep the current consumption low at normal operation and to improve linearity during high EMI/RFI conditions.  This method can simplify the antenna-mounted filter in GNSS automotive antenna applications.