The gain enhancement of Microstrip array antenna with dielectric lens -A comparative study

In this paper, a four element and an eight element Microstrip array antenna with its printed feed network on a monolithic substrate is first analyzed for the predicted radiation patterns and compared with experimental results. The gain enhancement of the Microstrip array with dielectric lens is then studied. The advantage of using dielectric lens is observed to be 4dbi extra gain which translates to an effective larger size antenna. These types of array-lens are useful as low cost smart antenna. The experiment is carried out in S band range of frequencies.