Compact High Gain Stacked Offset Broadband Microstrip Antennas as an Alternative to Normal Stacked and Array Configurations

A novel offsetting technique to enhance the gain of broadband patch antennas as an alternative to high gain stacked and array configurations of patch antennas is presented in this paper. Principle of stacking is successfully implemented and the position of the upper parasitic patch is offsetted to enhance the gain of the antenna. The design greatly reduces the separation between the patches up to 0.046 lambda(g) to enhance the gain thereby reducing the overall volume of the antenna. The maximum achievable gain is found to be 8.9 dBi. The measured results are explained in detail in this paper.