Enhanced radiation from an electrically small antenna using sub-wavelength metal strip grating

Author:

Pushpakaran, Sarin V.  Mani, Manoj  Pezholil, Mohanan  Chndroth, Aanandan  Kesavath, Vasudevan  

Journal:

JOURNAL OF PHYSICS COMMUNICATIONS

Issue Date:

2018

Abstract(summary):

This article reports the radiation performance enhancement of an electrically small antenna using sub-wavelength metal strip grating, in the microwave frequency regime. The sub-wavelength grating converts the high spatial-frequency components of radiation emitted from an inductor loaded truncated-ground open coplanar antenna into a low spatial far-field spectrum. The spectral conversion results in enhanced efficiency and radiated power gain in the S-band corresponding to TE polarization. The gain of the antenna is enhanced from -9.74 dBi to 1.6 dBi for TE polarization. The prototypes are fabricated in-house and the design is validated experimentally.