%0 Journal Article %T Comparative Study of the Resonant Frequency of E-Plane and H-Plane Coupled Microstrip Patch Antennas %A Mukul Khan %A Indrani Ray %A Durbadal Mandal %A Anup Kumar Bhattacharjee %J PIER C %D 2008 %I EMW Publishing %R 10.2528/PIERC08030301 %X When a microstrip patch antenna is brought closer than 0.2¦Ë to an identical patch the resonant frequency of that antenna changes from the designed frequency. In this paper numerical results for the resonant frequency are presented from a theoretical analysis of the mutually coupled -plane microstrip patch antennas with confirming experimental results. We have also established the relation between resonant frequency of -plane coupled and -plane coupled microstrip patch antennas. %U http://www.jpier.org/pierc/pier.php?paper=08030301