Title :
Investigation on efficacy optimization of RF-driven automotive D-lamps
Author :
Schopp, Christoph ; Heuermann, Holger ; Holtrup, Stephan
Author_Institution :
Dept. of High Freq. Technol., Aachen Univ. of Appl. Sci., Aachen, Germany
Abstract :
Investigations on driving high-intensity discharge xenon lamps with a 2.45GHz signal show an increase of the efficacy. These lamps are used as automotive headlights, because of their high efficacy and their high luminance. The RF-signal also enables the usage of several optimizing features such as amplitude modulation. By enabling an amplitude modulated envelope an efficacy increase of 17% is measured. The investigation of the optimization of the efficacy is presented using a switched DC lamp, compact coaxial lamp and low loss waveguide and verify the improvement. The results are further analyzed using a photo diode to measure the influence of the modulation.
Keywords :
automotive components; discharge lamps; optimisation; photometry; RF-driven automotive D-lamps; compact coaxial lamp; efficacy optimization; high-intensity discharge xenon lamps; low loss waveguide; photo diode; switched DC lamp; Frequency measurement; High intensity discharge lamps; Plasma measurements; Plasmas; Sea measurements; Switches; Voltage measurement; 2.45 GHz plasma; Microplasma; RF-driven lamp; impedance transformation; plasma lamp;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986645
