Analysis of Electromagnetic Field Radiation from a Rectangular Cavity-Backed Slot Antenna Using ADI-FDTD Method

Citation:
Nyaory GM, K’Onditi DBO, Ouma HA, Musyoki S. "Analysis of Electromagnetic Field Radiation from a Rectangular Cavity-Backed Slot Antenna Using ADI-FDTD Method." Journal Of Information Engineering and Applications . 2012;2(No. 8):1-8.

Abstract:

In this paper, a rectangular Cavity Backed Slot Antenna (CBSA) Model excited by a probe is investigated.
The analysis is carried out using the Alternating Direction Implicit - Finite Difference Time Domain (ADIFDTD)
Method which is applied to investigate its characteristics in terms of radiation patterns and power.
This is because the method is capable of providing a more accurate definition of the electromagnetic fields
within the rectangular apertures, while eliminating the Courant-Friedrich-Levy (CFL) stability condition
which is present in the regular Finite Difference Time Domain (FDTD) method. A cavity-backed slot
antenna structure with dimensions of 14cm×22cm×30cm is analyzed with the slot and aperture
measurements done at 3GHz. Results showing current distribution on the material surrounding the
apertures are presented and a discussion on the physical aspects of the aperture radiation phenomenon is
also presented.

**This research was sponsored by The German Academic Exchange Service (DAAD)**

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