Circular patch antenna with DGS structure for radio frequency identification (RFID) usage / Nurul Hidayah Md Nawai

Compact size, high performance and low cost are become often become a prerequisite in most modem microwave communication systems. In recent years, microstrip antennas have its own attraction to the scientists for their possible usage in satellite, mobile and wireless communication systems due to the prerequisite demand. These antenna are increasing in popularity for use in communication systems, therefore they are extremely compitable for embedded antennas in handheld wireless devices such as cellular phones, pagers etc. Microstrip antenna quite versatile in terms -of resonant frequencies, polarization, radiation pattern and impedance, so that this project was chose to design the conventional circular patch antenna as the radiating element. However, future technology needs smaller patch antenna to go well with future gadgets. In order to overcome this limitations, a new technology has emerged which may be the key developing circular patch antenna. The circular patch antenna of a radio frequency identificatin (RFID) usage with defected ground structure (DGS) are designed on the predicted frequency which is 2.5GHz.