Aspects Regarding Radiated Emissions Produced by a Head Up Display

The radiated emissions (RE) measurement is one of the most important tests that must be performed during a full qualification stage, in order to validate an electronic product for series production, in the automotive industry. Radiated emissions test must ensure that the level of the spurious signals is below a frequency dependent stated value (limit), agreed for proper operation of the DUT in its intended environment and application. The originality of this paper is to present a shielding solution that is confirmed in both near field and far field to reduce the time to market for the product. The magnetic near field measurements are performed by using the EMSCAN system. Acquired near field signals are used for finding the electronic components that are the source of emissions and as guidelines to the solution.

I. Introduction

Radiated Emission (RE) tests in the Automotive Industry are performed according to CISPR 25 in a semi-anechoic chamber (SAC) within an EMC laboratory. In many cases, abnormal high levels of emissions are obtained in testing and the project team does not have knowledge about the source of perturbations [1], [2].