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In this paper, we consider the problem of removing outliers from phase measurements in phase of arrival (POA) based localization, applied for the landslide monitoring. Our approach adopts so called cumulative residues and recursively removing outliers. The simulation results show that the proposed method has successfully removed outliers.
The feasibility of a high capacity radio link employing Orbital Angular Momentum (OAM) mode-multiplexing is discussed in this paper. Experiments are conducted with the supports of Software Defined Radio (SDR) based system for signal processing, A/D and D/A conversions, modulation and demodulation (MODEM), and dielectric lens fed by Uniform Circular Array (UCA) for OAM signals transmission and reception...
In this study, we investigate the mathematical structures of imaging function used in subspace migration for obtaining images of small dielectric inhomogeneities when the diagonal elements of multi static response (MSR) matrix cannot be obtained. Based on the asymptotic formula in the presence of inhomogeneities and the structure of the singular vectors linked to the nonzero singular values of the...
This paper presents the results of the antenna pattern measurements conducted on the Ice Cloud Imager 664 GHz feed horn at the ESTEC Sub-mmwave Scanner (SmS) in support to the ICI instrument of the MetOp-SG program. Very good agreement between simulations and measurements was obtained, both in the co- and cross-polar component. The measured peak directivity was 26.28 dBi ± 0.13 dB while the simulated...
This paper will present a series of novel polarization reconfigurable antennas for modern wireless applications. First, three multi-linear polarization reconfigurable antennas with the switchable 0°, +45°, 90° and −45° polarizations are investigated for mitigating the polarization mismatching problem in wireless biomedical applications. Three distinctive techniques were adopted to realize the same...
This paper purposed the plugs-shaped monopole antenna by adding stub and slot etching tuning technique on patch for the impedance bandwidth enchantment and the capability to support the applications in DCS, PCS, WCDMA/UMTS, WLAN IEEE 802.11 b/g and Bluetooth system. The prototyped antenna structure has been fabricated on FR4 printed circuit board (FR4) with dimensions of 36×40 mm2. The measured result...
In this paper, the bandwidth enlargement method of the conventional λ/4 monopole antenna on finite ground plane is investigated for utilization in IFF (Identification friend or foe) of the secondary radar the operating frequency 1.03–1.09 GHz. For the initial study, we have proposed the structure of the resonant holes on the surface of a sector of metallic cylinders covering such the monopole that...
Communication and data transfer demands are growing fast in last few decades. In order to obtain higher data transfer, it is necessary to determine proper antenna placement in a wireless system. In this paper, we research propagation in tropical environment and L-Band frequency by conducting distance and high variation measurement at frequency 1.8 GHz and 2.4 GHz. The received power level decreases...
This paper proposes a study of complex relative permittivity (∊r=∊r′-j∊r″) for monitoring watermelon. The complex relative permittivity of peel and pulp are analyzed as variation of maturity stages and used for determining mature fruit of watermelon from the measured reflection coefficient. The results depict the operating frequency is in the range 0.8 to 3 GHz. The distinct difference of reflection...
The active element pattern (AEP) and beam pattern of a patch array antenna are analytically calculated with a finite ground plane. The patch antenna is modeled by two equivalent magnetic current sources. Edge diffraction by surface wave is also added. To obtain AEP, the phase and magnitude of scattering parameters from full-wave simulation are utilized. To validate our calculation, the calculated...
In this paper, a Half-Mode Substrate Integrated Waveguide (HMSIW) with interdigital slots mounted on its surface is used to explore fixed-frequency beam-steerable characteristic of Composite Right/Left Handed (CRLH) antenna based on HMSIW structure. By combining varactors and the PIN diodes with the antenna structure, fixed-frequency beam-steering radiation pattern can be realized. Main goal of our...
A miniaturized independently tuning dual-band multi-mode antenna using postwall slotline (PWS) is proposed and simulated in this work. The antenna consists a stepped impedance slot and a patch on the other side of the substrate, and the patch is attached at the edge of the slot by shorting pins. The stepped impedance slot based on the postwall slotline is actually a dual-mode slotline antenna working...
In this paper, the computational modeling of the 2D human breast in hyperthermia treatment at 2.45 GHz is studied. The mathematical tool used in this study for investigating the distribution of generated heat is the COMSOL software where the breast is modeled by Pennes' bioheat equation. The model simulation is conducted to investigate the effects of exposure time and power inputs on the cancerous...
In order to improve the gain of the array antenna element in the W-band and reduce its horizontal dimension, The directional radiation antenna loading dielectric sheet based on SIW technology is proposed. The antenna uses a conventional micro strip line to feed the gradient open micro strip line. Then the gradient open micros trip line feeds the SIW. Finally, the dielectric sheet loaded in SIW will...
This paper proposes the ring antenna with circular probe feeding for MIMO systems. The ring antenna structure was adjusted by using the circular probe feedings on the ground plane to increase bandwidth and arrangement the elements of array antenna in four cases. The structural tuning technique was used Computer Simulation Technology (CST) program to analyze the antenna characteristics such as S11,...
An 8×8 slot array with high-efficiency and corporate-fed single layer by ridge gap waveguide at 60-GHz is introduced in this paper. The manufactured antenna depicts more than 19.6% bandwidth with input reflection coefficient better than −10 dB and the aperture efficiency higher than 70% with around 26 dBi realized gain between 58 and 66 GHz.
The dual band MIMO antenna composed of inverted L antenna is proposed and numerically analyzed. The design frequency is 2.4 GHz to 2.5 GHz, 5.15 GHz to 5.35 GHz. Inverted L antenna is formed by the coplanar waveguide. The parasitic planar rectangular loop is placed above the of inverted L antenna. When the size of conducting plane is 51 mm by 48 mm, the S11 less than −10 dB is satisfied from 2.4 GHz...
This work presents a high-gain double reflectors microstrip-fed slot antenna for WLAN and WiMAX applications as the IEEE 802.11b/g and IEEE 802.11a standards. The antenna is composed of a microstrip-fed slot with a complementary stub on a single substrate and a pair of reflectors. The reflectors are exploited to achieve bi-directional radiation patterns which is suitable for using in buildings or...
In this paper, a novel compact integrated antenna-diplexer for Frequency-division duplex low latency wireless backhaul links at E-band is presented. The proposed solution is designed in a multilayer architecture with each layer having different functional blocks. The layers have been stacked on top of each other without any electrical contact requirement between them. This is achieved by using packaging...
H-Plane substrate integrated waveguide (SIW) antenna made of textile for millimeter wireless body area network (WBAN) application is proposed. Three-stepped tapered matching structure was added to a coaxial feed for improving the impedance matching. The ground was extended to the antenna aperture to prevent the degeneration of radiation pattern by phantom. The extended arc shaped substrate improves...
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