Band Width and Gain Optimization of a Wide Band Gap Coupled Patch Antenna

Introduction The microstrip patch antennas are widely used in modern communication system due to low profile, low weight, low cost However, the antennas suffered from narrow bandwidth and low gain.[6 The major need for modern communication devices is to operate at wider band such as to support high speed internet, multimedia communication and similarly many more broadband services, this is achieved by using microstrip patch antennas, but inherently microstrip antennas are narrow band antennas. Therefore, numerous techniques have been presented to enhance the bandwidth for various communication systems. A single layer wide gap coupled patch antenna with achievable good impedance bandwidth has been demonstrated [3 5].Analysis of annular ring gap coup antenna and slotted patch antenna are investigated for the gain and bandwidth enhancement. [1 bandwidth and the size of an antenna are generally mutually conflicting properties, that is, improvement of one of the characteristics normally degradation of the other. In this paper, a novel inset feed patch antenna is investigated for the gain and bandwidth enhancement with compact size. The proposed antenna has been designed on glass epoxy substrate to give a wide bandwidth of 85.21% and maximum radiating efficiency of about 88%.