The novel and simple approach for achieving frequency tunability is presented. The frequency tunability is achieved using a single PIN diode. PIN diode located on the upper side of the structure to reduces the biasing complexity. The superstrate structure along with the corner truncation helps for enhancing the performance parameters, as well the location of feed and slot of the patch is varied for locating best performing points. This design provides the multiband frequency tunability behavior with the maximum frequency tunability of 100 MHz. The design provides the minimum reflectance coefficient of -22.56 dB, the directivity of 6.98 dB, the total gain of 3.683 dB, normalized directivity of 88 0 using the low profile (FR-4) substrate which helps for the cost reduction and mass production. The simulation is carried out using the HFSS tool. The fabrication of the proposed design is also presented. This design suitable for Wifi, GPS, and many more wireless communication applications.