Design of Small Antennas for Joypad Applications

Abstract

Demand of small antennas with low profile has been surging for hand-held wireless devices. Unfortunately, off the shelf antennas may not meet specific needs due to limited space or circuit foot-print available in the device. In this paper, we present the design of a pair of small antennas operated at 2.45 GHz for a joypad adaptor that converts a wired TV game console into a wireless one. One of the antennas is for transmitting and the other receiving. The adaptor has a size of 5 cm by 4.5 cm by 1.3 cm within which all the RF and base-band circuitries are also housed. The foot-print available for the two antennas is only 1.3 cm by 4.2 cm.