Compact dual‐band circularly polarized antenna for GPS/ETC operation on vehicles

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Abstract
A new integration design of two circularly polarized (CP) antennas for global positioning system (GPS) and electronic toll collection system (ETC) is presented. A probe‐fed corner‐truncated square microstrip antenna, which is a resonant‐type structure, is used for GPS operation at 1575 MHz. For achieving broadband CP operation in the 5800 MHz band (5725–5875 MHz) for ETC operation, a monopole‐fed CP loop antenna, which is a traveling‐wave‐type structure, is applied. The two antennas are integrated in a compact configuration in the proposed design and are suitable for GPS and ETC operations on vehicles. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 509–511, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20018

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