This research article contains process of RMPA modification into triple band feeler using negative media or metamaterial. The metamaterial structure contains amalgamation of rectangular and circular shapes to form a design which improvise the patch results to a great extent. The centre of interest in this letter is to use a microstrip patch antenna to operate at three different frequencies instead at operating frequency alone. This triple band feeler can operate at three distinguished frequencies 1.941, 2.586 & 2.784 GHz. whereas the operating frequency was 2GHz. The return loss for all the band frequencies is -29.1, -27.3 and -22.4 dB respectively and corresponding bandwidths are 23.7, 35.2 and 27MHz compared with return loss -10.11dB and bandwidth 9.4MHZ achieved by RMPA alone. All the designing and simulation work was done in the CST-MWS and the proving that the negative media is metamaterial was accomplished by MS excel software.
In this research article designing of a multiband antenna and simulation result of the same is presented. Initially a rectangular microstrip antenna was designed and then bandwidth and other parameters along with its operating bands were modified using the modification technique which is widely known as metamaterial. Designed antenna was radiating at 2.32GHz frequency with -10dB return loss and bandwidth was very nominal i.e. 17MHz only. Later after keen literature review it was found that various techniques are available to modify such low-quality antennas. Metamaterial technique was found more superior along with the other available techniques. After implementing metamaterial parameters drastically modified, single band antenna converted into 4 bands with bandwidth of each band was greater than previous one.
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