Theory and Experiment of Parasitic Element Effects on Spherical Probe-Fed Antenna
Journal Title: Journal of Information Systems and Telecommunication - Year 2013, Vol 1, Issue 3
Abstract
Theory and experiment of a spherical probe-fed conformal antenna with a parasitic element mounted on a spherical multilayer structure are presented in this paper. Rigorous mathematical Method of Moments (MoMs) for analyzing various radiating spherical structures is presented in this paper by using Dyadic Green's Functions (DGFs) in conjunction with Mixed Potential Integral Equation (MPIE) formulation. Linear Rao-Wilton-Glisson (RWG) triangular basis functions are applied in MPIE formulation. Current distributions on coaxial probe and conformal radiating elements are computed by using spatial domain Dyadic Green's Function (DGF) and its asymptotic approximation. A prototype of such an antenna is fabricated and tested. The effect of the parasitic element on the input impedance and radiation patterns of the antenna is investigated. It is shown that the antenna characteristics are improved significantly with the presence of the conducting parasitic element. Good agreement is achieved between the results obtained from the proposed methods and the measurement results.
Authors and Affiliations
Javad Soleiman Meiguni, Manouchehr Kamyab, Ahmad Hosseinbeig
On-road Vehicle detection based on hierarchical clustering using adaptive vehicle localization
Vehicle detection is one of the important tasks in automatic driving. It is a hard problem that many researchers focused on it. Most commercial vehicle detection systems are based on radar. But these methods have some pr...
The Surfer Model with a Hybrid Approach to Ranking the Web Pages
Users who seek results pertaining to their queries are at the first place. To meet users’ needs, thousands of webpages must be ranked. This requires an efficient algorithm to place the relevant webpages at first ranks. R...
A New Calibration Method for SAR Analog-to-Digital Converters Based on All Digital Dithering
In this paper a new digital background calibration method for successive approximation register analog to digital converters is presented. For developing, a perturbation signal is added and also digital offset is injecte...
Pose-Invariant Eye Gaze Estimation Using Geometrical Features of Iris and Pupil Images
In the cases of severe paralysis in which the ability to control the body movements of a person is limited to the muscles around the eyes, eye movements or blinks are the only way for the person to communicate. Interface...
Automatic Facial Emotion Recognition Method Based on Eye Region Changes
Emotion is expressed via facial muscle movements, speech, body and hand gestures, and various biological signals like heart beating. However, the most natural way that humans display emotion is facial expression. Facial...