The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper is presenting Finite Element Tearing and Interconnecting (FETI) simulation results of large scale Ka-band lens transmit-arrays obtained on massively parallel clusters. The computation times observed with the FETI method allow us to consider using it in the optimization phase of such transmit-arrays.
A kind of low sidelobe and high gain microstrip antenna array with 32×8 units operating in the X-band is designed, which achieves the gain of 28 dBi and the sidelobe level of −25 dB at 9.37 GHz. The Chebeshev distribution is used in designing the current distribution on the surface of this antenna, which achieves a width of main lobe of 5° in E-plane and a main lobe width of 10° in H-plane. The amplitude...
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.
This paper presents a simulation method for the DCO. EM simulations are essential and inevitable for modern LC oscillator design. Although EM-simulators provide high accuracy, the EM-simulation time is very long when metal-oxide-metal (MoM) capacitors are present. The proposed frame-based EM-simulation can significantly reduce the EM-simulation time even in the presence of MoM capacitors without influencing...
This paper presents the application of metamaterial structure for improving the gain of antenna to extend the reading distance of UHF RFID reader without any modifying of the original reader. The proposed structure of metamaterial is designed on the theory of Spilt Ring Resonator (SRR), which located in front of such the RFID reader, while the back side of reader is blocked with a metallic sheet as...
This paper presents the measurement and simulation results in a crowded area from our previously proposed path-loss prediction method. The root-mean-square (RMS) error between the simulation and measurement results was less than 4 dB, confirming that our method can accurately predict path loss in crowded areas.
This paper proposes a new frequency selective surface (FSS) using interdigital slot structure. By using the interdigital slot unit cell, the size can be reduced from A/2 of conventional one to A/8. Moreover, the proposed interdigital slot FSS can be applied with a dipole antenna to resonate at 1.8 GHz, resulting in a high gain of 8.43 dB. The radiation pattern is directional and bandwidth is about...
We describe an all-dielectric metasurface, based on elliptic dielectric resonators (EDRs), which is designed to work as a beam splitter at 16.98 GHz. The proposed metasurface refracts electromagnetic incident waves with orthogonal polarizations along two specific directions without reflection.
This paper presents an investigation of the effect of the antenna frequency band on the ground penetrating radar (GPR) image resolution. The investigation is achieved through simulations. In the simulations, two Scutcheon antennas are modeled as the receiving and transmitting antennas. A cross-shaped object is buried under the ground constructed with the dielectric material. The Gaussian pulses with...
In this paper, we study the dual-fed dual-polarized crossed bowtie antennas with different structure proposed for the radio telescope system in 300 MHz band. The performance of crossed bowtie antennas designed on the same surface (co-planar) and on different surface (stack-patch) are compared. The simulation of these antenna structures were carried out using CST Microwave Studio to determine the impedance...
This paper proposed a helical antenna in which circular parasitic rings are arranged inside a helical antenna. Compared to the gain boosting technique the traditional helical antenna, the height of the additional antenna does not increase. The gain of the proposed antenna is enhanced by a maximum of 2.5 dB in the working bandwidth by adding circular parasitic rings, while maintaining the Axial Ratio(AR)...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.