Design of vertical lines for vehicle rear window antennas

Abstract

In this article, we propose the design of a rear on‐glass antenna for a commercial sedan. We focus on optimizing the vertical lines of the antenna and propose the optimum design parameters to maximize the matching bandwidth and improve the average vertical gain for the entire FM radio band. The detailed design parameters are determined using the Pareto genetic algorithm with an EM simulation tool. The optimized rear on‐glass antenna was built and installed on a commercial sedan. The measurement results showed a matching bandwidth of about 15%, an average bore‐sight gain of about −2.86 dBi in the entire FM band, and an average gain of about −14 dBi along the azimuth direction. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1445–1449, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25184