Circular microstrip antennas loaded with two annular rings

The recent growth in communication has created a need for different antennas for practical case. Antenna is a device that transmit or receive the information from the transmission line to the free space or vice revers. It is considered as a matching device between the transmission line and free space. The present study involves a theoretical study to design circular microstrip antenna loaded by two annular rings (CMSAL2AR) to improve different antenna coefficients such as bandwidth and directive gain by the loading process of different geometric shapes of patches.