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A comparison of Finite Difference Time Domain (FDTD) methods, for conformal antenna array modelling. This study includes the measurement of Dual Feed Dual Circular Patch Antenna elements mounted in the Variable Geometry Conformal Antenna Array Test Rig. These measurements together with predictions from the Bristol FDTD Model, allows a comparison of antenna array measurements with model predictions...
In spite of the good benefits of using MIMO technology with modern wireless systems, a major problem has arisen from using it with small wireless terminals. When antennas are placed with less than half wavelength apart then mutual coupling occurs. Researchers have found that mutual coupling can affect the performance achieved by multiple antennas which results in a large reduction in channel capacity...
The properties of a four element slot antenna array mounted on a PDA for a MIMO system are investigated by means of a finite difference time domain analysis and a multipath channel model. The effects of changing the positions of the antenna elements on the PDA box and the effect of the box being held in a human hand are investigated
This paper presents 2D finite difference time domain (FDTD) and finite element (FE) modeling of liquid crystal (LC) devices. The enhancements to standard FDTD required for fully non-diagonal tensor materials such as LCs are outlined and they have been implemented in an in-house code. The results have been validated against a commercial FE package and good agreement is observed. The codes are then...
A 3D FDTD modelling is used to study the effect of surface roughening on the vertical emission of a point source emitting at lambda0=0.94 mum embedded in GaAs with a mirror behind the dipole. Enhancement of emission is seen at lambda0=1.95 mum for a rough-surface device with a perfect metal mirror placed 150 nm below the source
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