Small-size surface-mountable circularly polarized ceramic-chip antenna for GPS application

A small-size circularly polarized ceramic-chip antenna suitable for surface mounting on a system circuit board is presented. The antenna mainly comprises a square radiating patch with a cross slot on the top surface, a square ground plane on the bottom surface, and a side-feed conformal strip on the side surface. For obtaining circular polarization (CP) radiation for global positioning system (GPS) operation at 1575 MHz, a prototype is constructed using a square-disk ceramic chip of dimensions 12 × 12 × 4 mm3 and having relative permittivity of 90, and the experimental results are presented. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 300–302, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11360