Miniaturized UHF planar antenna, for wireless indoor systems

In this paper a miniaturized Ultra High Frequency planar microstrip antenna is presented, which can be used in wireless indoor systems, such as on wall receivers, control units etc. The aim of this project was to make a miniaturized antenna for an indoor wireless receiver, operating at 868MHz. The main challenge for designing such an antenna model was the limitation of available space for the antenna structure. In addition to that, the antenna should also be low cost, having an omni-directional radiation pattern and with a respectable gain. The miniaturized antenna model was achieved by shortening the radiating part of the antenna to the ground plane, similar to that of PIFA (Skrivervik et al., 2001), to reduce the size of the antenna. It also fulfills other requirements, like low cost, omni-directional radiation pattern and respectable gain. In this paper we will discuss the design, development and performance based on the measured results, of such a miniaturized antenna model.