Related Experiment Video
Updated: Aug 10, 2026

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
Design and analysis of annular antenna arrays with different reflectors
1Department of Electrical and Computer Engineering, BOX 90291 Hudson Hall, Duke University, Durham, NC 27708, USA.
Abstract:
The design and performance of annular antenna arrays with reflectors is presented. Arrays with three shapes of reflectors are analysed and simulated. These include the corner reflector, the circular reflector and the elliptical reflector. Power-density distributions within the annular arrays with and without reflectors are obtained by using the FDTD method. Also, the image theory method is used to verify the FDTD results in one case. By comparing the power-density distribution pattern of all four of the array designs (three with different reflectors, one without reflector), it is readily seen in each case that the array with reflectors yields better power-efficiency than the array without reflectors and the elliptical reflector yields the best performance. Comparisons of each array are made using 4, 6 and 8 antennae in the annular array. By using the optimized results of the elliptical reflector, the requirement for the input-power level to each antenna is greatly reduced.
Related Concept Videos
Mesh Analysis for AC Circuits
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Design Example: Calculating Safe Diameter for Wind-Exposed Disc
Design Example: Traverse Angle Computations
Polar Coordinates: Problem Solving
Surface Area Calculations
Reflective Property of Parabolas

