An extraordinary transmission analogue for enhancing microwave antenna performance

Sarin Valiyaveettil Pushpakaran, Jayakrishnan Methapettyparambu Purushothama, Aanandan Chandroth, Mohanan Pezholil, Vasudevan Kesavath

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The theory of diffraction limit proposed by H.A Bethe limits the total power transfer through a subwavelength hole. Researchers all over the world have gone through different techniques for boosting the transmission through subwavelength holes resulting in the Extraordinary Transmission (EOT) behavior. We examine computationally and experimentally the concept of EOT nature in the microwave range for enhancing radiation performance of a stacked dipole antenna working in the S band. It is shown that the front to back ratio of the antenna is considerably enhanced without affecting the impedance matching performance of the design. The computational analysis based on Finite Difference Time Domain (FDTD) method reveals that the excitation of Fabry-Perot resonant modes on the slots is responsible for performance enhancement.
Original languageEnglish
Article number107239
JournalAIP Advances
Issue number10
Publication statusPublished - Oct 2015


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