M.  Selvarani, N.  Gunasekaran, 
    Dualband L-Probe Fed Rectangular Microstrip Antenna with Parasitic Element,
    Journal of Mobile Communication,
    Volume 4,Issue 3,
    2010,
    Pages 60-63,
    ISSN 1990-794x,
    jmcomm.2010.60.63,
    (https://makhillpublications.co/view-article.php?doi=jmcomm.2010.60.63)
    Abstract: Microstrip antenna has many advantages. However, Narrow Bandwidth is the major disadvantage of this antenna in practical applications. This study proposes and investigates a dualband rectangular microstrip antenna with parasitic element fed by L-probe. The aim of the proposed research is to achieve dualband by electromagnetically coupling the two patches where one is driven and the other is parasitic. An L-shaped probe feeds the driven patch. The impedance bandwidth achieved is 63.35%, centered at 9.981 GHz and 33.48% centered at 13.99 GHz with a return loss >-10 dB. The antenna gain for the operating frequencies within the impedance bandwidth is 6 dBi.
    Keywords: Microstrip antennas;bandwidth;L-probe feed;parasitic patch