H.-S. Noh, U.-H. Park, “Three-stacked microstrip patch array antenna for both transmitting and receiving", IEE proceedings; Microwave, Antennas and Propagation, Volume: 153  Issue: 4, August 2006, Page(s):  385- 388

The publication is available to download from http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=35268&isYear=2006