Dual Band GNSS Antenna Phase Center Characterization for Automotive Applications

TL;DR

This paper presents a low-cost dual-band GNSS patch antenna with characterized phase center variation, demonstrating its effectiveness in automotive applications through indoor and outdoor testing for accurate receiver positioning.

Contribution

It introduces a compact, low-cost dual-band GNSS antenna with detailed phase center variation analysis and validation in automotive environments.

Findings

Phase center variation measured indoors

Effective phase error correction achieved

Accurate vehicle positioning demonstrated

Abstract

In this paper, a low-cost small size dual-band ceramic GNSS patch antenna is presented from design to real sample. A further study of this patch antenna illustrates the absolute phase center variation measured in an indoor range to achieve a received signal phase error correction. In addition, this low-cost antenna solution is investigated when integrated into a standard multi-band automotive antenna product. This product is evaluated both on its own in an indoor range and on a typical vehicle roof at an outdoor range. By using this evaluation file to estimate the receiver position could achieve phase motion error-free result.