Taking the demand for small size, easy fabrication and low cost into account in the development of low-power radio devices for short-range 2.4GHz applications, a quarter wavelength monopole antenna implemented on the same printed circuit board as the radio module is a good solution. A printed quarter wavelength monopole antenna is very easy to design and can be tuned simply by slight changes in length. This article presents basic guidelines on how to design such an antenna for use together with the nRF2401 Single chip Transceiver and the nRF2402 Single chip 2.4GHz Transmitter. The described antenna should be fabricated on standard 1.6mm, low cost FR4 printed circuit board (PCB).