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In this paper we assess the influence of the conductivity of the medium on the radiation characteristics and input impedance of a loop antenna designed for underwater communications. The initial study is based on simulation of the antenna characteristics using FEKO electromagnetic (EM) software. Additionally, an equivalent circuit model of the antenna is also obtained and simulation of the input impedance...
An ultra wideband printed monopole antenna with dual band circular polarization for wireless application is presented. The antenna dimensions are 30 × 30 × 1.6 mm3. The proposed antenna is able to cover frequency range between 2.65 GHz and 11 GHz with impedance bandwidth is around 122%. With the use of I-shape slit in the radiation element and the T-slot in the ground plane, the ultra wideband and...
This paper presents a new electrically small rectangular microstrip patch antenna loaded with metamaterial multiple split ring resonator (MSRR). The unloaded rectangular microstrip patch antenna resonates at 14.80 GHz, after loading it by MSRR its resonant frequency is lowered to 6.15 GHz with the impedance bandwidth of 217 MHz. This antenna has gain of 5 dBi in a small size with the directivity of...
An extension of the Sources Reconstruction Method (SRM) for antenna diagnostics using phaseless information is presented. The aim of this work is to extend the method's capabilities from planar field acquisition domains to arbitrary ones. To achieve this goal, the SRM capabilities for handling with arbitrary-geometry domains are combined with phase retrieval technique. The consideration of the radiation...
Bandwidth characteristics of a wearable antenna are one of the major factors in determining its usability on the human body. In this work, a novel structure is proposed to achieve a large bandwidth, in order to avoid serious antenna reflection coefficient detuning when placed in proximity of the body. The proposed structure is designed based on a simple structure, in order to provide practicality...
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