International Journal of Engineering and Technology

The third and fourth generation communications require increased bandwidth for its hassle free data transfer and communication without interruptions. The quantum of data transfer is huge and is ever increasing furthermore. Thus, there is a need for an antennae system of higher efficiency to facilitate data transfer at high speed. This paper is focused on to develop a patch antenna to form a highly directional beam to maximize the power transfer for DS-CDMA wireless communication for mobile applications. The patch antenna is optimized by using ADS software. Antenna is designed in such way so the given bandwidth for uplink and downlink is best achieved. An antenna for downlink is designed and subsequently its characteristics are analyzed. A circular polarization is chosen since it is easier to implement and also a less loss is associated with it. A coaxial feeding technique is used to get better impedance matching. The radiation loss, bandwidth, impedance, s-parameters and efficiency parameters are analyzed for performance at a resonance frequency of 2.24 GHz range. The gain achieved is about 7 to 9 dB at efficiency of about 80%. Return loss estimated at -1.423 dB. The analyses of simulated results show radiated power at the rate of 0.25 mW/sterad. The directivity and absolute fields’ distributions are good. The patch antenna of these characteristics is expected to be useful for DS-CDMA mobile communication in 4G networks in near future.