Enhanced Antenna Design for Rectenna Application in the 2.45 GHz ISM Band
Abstract: In this paper a two
layers microstrip antenna design at 2.45 GHz ISM band with Harmonic rejection filter
embedded on the ground plane is presented. The two roger substrates with
relative permittivity of 2.2 are separated by an air gap which enhances the
antenna gain. The design is simulated using Computer Simulation Technology
(CST) Studio Suite 2015. Different aperture couplings slots such as rectangular
andtriangular aperture coupling slots are studied and compared. It is found
that the antenna with triangularaperture coupling slot enhances the antenna
performance by suppressing 2nd and 3rd harmonics at 5 GHz and 8 GHz,
respectively, increasing the antenna gain and providing a better circular
polarization behavior.The simulated antenna design achieves a gain of 9 dB,
return loss of -23.6dB, axial ratio of 1.27dB and axial-ratio bandwidth of
40.8% (2 ~ 3 GHz). The proposed antenna shows an enhancement in the antenna performance
which makes it a suitable candidate for rectifying antenna or rectenna
application as it can increase the total conversion efficiency resulting in a
high output DC voltage used to power low power electronic and electrical
devices such as wireless sensor.
Keywords: Antenna, Aperture
coupling, Harmonic rejection, circular polarization, Rectenna application
Author: Sharif Ahmed,
Zahriladha Zakaria, Mohd Nor Husain, Azahari Salleh, Ammar Alhegazi
Journal Code: jptkomputergg160028
