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Design of an on‐glass vehicle antenna using a multiloop structure

We propose a novel on‐glass antenna with a multiloop structure for FM radio reception in a recreational vehicle (RV). The proposed antenna consists of multiple loops that are printed on a quarter glass with copper striplines. In spite of its simple planar structure, the antenna provides a broad matching bandwidth and a high vertical radiation gain. Antenna performances such as the return loss and boresight gain were measured after the antenna was installed in a commercial RV. The proposed on‐glass antenna exhibits an average gain of about −9.5 dBi with a deviation of <4 dB compared with the gain of a conventional λ/4 roof‐mounted monopole. Transparency of the antenna body was also improved by adjusting the stripline widths based on the induced current distribution. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 107–110, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24836