Designing Concept of Circular Patch Cavity Antenna

Wireless technologies have triggered an important revolution in the world of telecommunication networks and services. Modern telecommunication systems, such as the latest generation mobile phones or wireless LANs, have appeared being enthusiastically accepted by people these requires antennas with wider bandwidth and smaller dimensions than conventional antennas. Operators are looking for systems that can perform over several frequency bands called as multiband antennas. In the central unit multiband antennas are necessary to cover several frequency bands with a single radiating element. This has initiated antenna research in various directions, one of which is by using slotted patch antenna elements. The types of functionality now being demanded includes multiband operation, in some cases different radiation patterns are needed in the different bands. For example, the handsets are being produced with terrestrial cellular capability coupled with satellite based communications along with Bluetooth, Wi-Fi, GPS and many other operations.