Transparent Water Patch Antenna

Abstract

A research of novel transparent water patch antenna fed by microstrip line is studied in this final year project. Pure water is used to construct radiating patch, transmission line, ground plane in novel patch antennas which have similar working principle as usual metallic patch antenna. My study approach is to develop novel water dielectric patch antenna step by step. Three different models of water patch antenna are designed and analyzed in this study where the substrate is glass. Water is utilized to serve as radiation patch in the 1st model with metallic transmission line and ground; Then, water works as both transmission line and patch; In the last model, water replaces the original metallic elements on traditional patch antenna so that the model becomes transparent. The TM10 mode is excited inside cavity between water patch and ground plane. The water patch antenna is found to have low profile and larger bandwidth than that of usual metallic patch antenna. The antenna operating at 0.9GHz has an impedance bandwidth of 20% and maximum gain within range of operation of 3.8dBi. The radiation efficiency is of 60% and radiation patterns is symmetrical and unidirectional with low back lobe and low cross polarization. Because of the transparency of water and glass case, this novel water patch antenna can achieve more beautiful design from aesthetic perspective when put onto the reflection curtain wall buildings or applied in other applications such as RFID readers, WIFI base station and remote camera controlling technique.