An improved mutual coupling calibration approach based on the Element Pattern Reconstruction (EPR) method is proposed in this paper. Compared to previous calibration methods in which the calibration is carried out in the entire space, the space angle ranges to be calibrated in this method is partitioned according to the interested directions. Through the partition ...
In this paper, a new antenna is designed in order to use in the Wireless Capsule Endoscopy (WCE) system. This antenna consists of two parts; the small monopole part and the small spiral. Having the omnidirectional radiation pattern for covering the stochastic motions of the capsule into gastrointestinal and also, appropriate gain and wide bandwidth ...
The radio blackout problem stands as one long obstacle for hypersonic flight and planetary atmosphere reentry. Rather than previous physical mitigation methods aiming to reduce the plasma electron density, this paper proposes a novel method which attempts to communicate at carrier frequency much higher than the plasma cutoff frequency. To overcome the highly dynamic channel ...
A circular patch antenna based on open elliptical-ring slots and shorting vias with conical radiation patterns is proposed. Fed by the coaxial probe at the center of the circular patch, the proposed antenna is excited at three resonant modes, simultaneously. The first resonant mode (monopolar patch mode) is achieved by six shorting vias, each of ...
While Archimedean spiral antennas were invented a half-century ago, only self-complementary impedance can be evaluated directly from the Babinet’s principle. This paper examines the effects of metal width and arm spacing on printed spiral’s input impedance. A model is proposed based on examination by decomposition of planar spiral. A closed-form expression for the input impedance ...
An advanced hybrid deterministic/metaheuristic approach to the synthesis of non-uniformly spaced linear printed patch antenna arrays is presented. A novel hybrid approach to the synthesis of non-uniformly spaced linear arrays of printed antennas is presented and thoroughly discussed in this paper. In order to account for parasitic mutual coupling between array elements, a dedicated optimization ...
In monostatic radars systems, only the micro-motion signatures projected onto the radar Line-Of-Sight (LOS) can be observed from echoes. As a result, the obtained micro-motion signatures (e.g., the radius length of rotation) are sensitive to the radar LOS. In this paper, the authors propose a method for the accurate estimation of Three-Dimensional (3D) micro-motion signature ...
The investigation of finite ground coplanar fed Ultra-WideBand (UWB) antenna and the influence of its curvature and the proximity of circular metallic screen on the reflection coefficients and radiation characteristics is presented. The antenna is composed of two circular coplanar strips which enclose slot aperture of similar shape and is designed on a thin and ...
A novel inductively loaded monopole for future Ultra-Wide Band (UWB) applications is presented. The antenna is compact and of small size (16x20x0.8mm) and offer a very simple geometry suitable for low cost fabrication and straight forward printed circuit board integration. More specifically, the impedance matching of the classic printed inductively loaded monopole is improved by ...
In this paper, a dual-fed circularly polarized antenna design with high isolation is presented for Radio Frequency IDentification (RFID) reader. The proposed antenna is excited by two fed ports connected with a circular split-ring microstrip line underneath the ground plane. A radial aperture in the ground plane provides coupling between the split-ring microstrip and radiating ...