It is well known that microstrip patch antennas have a poor bandwidth due to the small spacing between the patch and the ground plane. A stacked patch configuration has been demonstrated experimentally as a feasible solution, but little information on the design procedure is available. Here, a systematic design procedure based on a single network model is shown.
Anguera, J.; Puente, C.; Borja, C. A procedure to design wide-band electromagnetically-coupled stacked microstrip antennas based on a simple network model. A: IEEE International Symposium on Antennas and Propagation. "1999 IEEE International Symposium on Antennas and Propagation, vol. 1: proceedings: 11-16 July 1999, Orlando, FL, USA". Orlando, Florida: Institute of Electrical and Electronics Engineers (IEEE), 1999, p. 944-947.