Design Of Slot Planar Antenna

Nor Saidatina , Abdul Latif (2010) Design Of Slot Planar Antenna. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Microstrip antennas are useful in many applications such as application in WLAN. It is because of their numerous advantages such as low profile, low cost, lightweight and easy fabrication. However microstrip has disadvantage that is narrow bandwidth. In order to solve the problem of narrow bandwidth in WLAN systems, slot planar antenna is designed. The slot antenna provides a wider bandwidth with less dependence on substrate thickness. The current of a slot antenna is distributed on a metal sheet around the slot and so less energy is stored between the antenna and ground plane. They are also superior to dipole and patch antennas since they have low cross polarization and less surface wave losses. A slot planar antenna is designed in order to obtain the required parameter responses at 5.2 GHz to be used in WLAN. This slot planar antenna is simulated by using Computer Simulation Technology (CST). From the simulation, results of gain, directivity, radiation pattern, HPBW, FNBW and return loss are obtained. This antenna is etched on a FR4 with dielectric constant of 4.9 with the height of 1.6 mm. A prototype of the slot planar antenna is built and tested by Vector Network Analyzer (VNA). The main parameters concerned are return loss, bandwidth and gain. Then the measurement result obtained would be compared to the simulation result. With these designs, impedance bandwidth of approximately 20% has been obtained.

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