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A dual-band millimeter-wave (mmW) dielectric resonator antenna (DRA) in silicon based integrated passive device (IPD) technology for unlicensed V-band (57–64 GHz) and E-band (71–86 GHz) applications is proposed in this paper. In the proposed structure, dielectric resonator (DR) was fed by using vertical coupling feed architecture to improve the antenna efficiency and gains. The simulated results show...
In this paper is described a set of constraints applied to a wireless power-supply system (emitter and receiver) for operating in optimal conditions. These constraints regard both geometrical aspects and operational conditions of the system. There is also presented the performance optimization in the power wireless transfer. Starting from the equivalent scheme of a wireless power transfer system sinusoidal...
There are lots of efforts to improve interworking architectures for the purpose of offloading cellular traffic via complementary wireless technologies. Some offer a specific feature and others work on a generic one, and yet there is a need for feature-rich interworking architecture for offloading purposes. This paper proposes a fully integrated, hybrid and Quality of Service aware interworking architecture...
In the paper, a simple equivalent circuit model is built between transmitting coil and receiving coil via coupled magnetic resonance, and the simulation of frequency and efficiency is also supply. Node equations for the resonance coils are built by using the equivalent circuit and the optimum distance is analytically derived for optimum coupling coefficient for high transmission efficiency. The equivalent...
Wireless power transmission is a special concern of electrical engineering with major implications in the life of society. It is manifested both in the scientific field through the large number of congresses and prestigious journals publications as well as in various practical applications ranging from medical care to robotics, communications and military technique. After a latency of more than 100...
To design antennas for underwater communication systems using LF band, the transmission factor of dipole antennas with the sheath immersed in seawater are investigated by numerical study. Comparison of antenna characteristics between dipole antennas with different sheath structure is presented.
This paper focuses on using uniform lines to realize impedance matching, addressing the drawbacks of wireless technology including low efficiency and limited transmission distance. SS topology resonance network is studied, in which two capacitors in wireless network are also included. To realize long-distance transmission, lossy lines are designed, as well as lossless lines for impedance transformer...
An original ElectroMagnetic simulation methodology based on the hybridization of deterministic and statistical models is proposed to study wireless signal propagation inside a train. The coupling between the EM methods is performed with the Kron's networks formalism to significantly optimize the compromise between simulations accuracy and computation resources. The proposed hybrid model offers promising...
The paper considers WBAN and intersegment WBAN communication approaches. At present, WBAN is rapidly developing. So, it's necessary to study not only WBAN standards and technologies, but also WBAN to WBAN interaction, especially using IBC. In this work the IEEE 802.15.6 standard is considered, BodyCom technology has been studied. Practical tasks that can be solved by IBC WBAN intersegment communication...
Wireless transceivers for biomedical implants suffer from low coupling coefficients and variations due to misalignment. This paper introduces concentric helical coils for wireless power transmission in implantable devices. The transmitter coil can be implemented in any continuous circle form, such as a bracelet, an arm cuff, or a collar. It is shown that this structure produces a high coupling coefficient...
The present text provides information regarding introductory concept of wireless power transfer by studying some of the existing technologies and evaluate its quality factor as well as deals with certain methods of improving the efficiency of wireless power transfer. In addition to this, calculation and analysis has also been done for its figure of merit, transfer loss, quality factor and efficiency.
On-chip wireless optical communications among distant cores in chip multiprocessors can lead to a completely new approach to the limits of current on-chip communication. In fact, using wireless connections mitigates the problems related to the design and the fabrication of hugely complex switching fabrics, where long paths suffer of crosstalk and loss issues. We investigate the possibility of integrating...
The wireless power transfer (WPT) has many advantages such as convenience of energy transfer and high reliability of system. Therefore, WPT system is widely applied to IT devices, electric vehicle, and industrial application by using concrete structure. However, when is applied to reinforced concrete structure, there is a severe problem that it has very low efficiency for power transfer, which results...
Wireless underground sensor networks (WUSNs) based on magnetic induction (MI) have been recently proposed as a promising candidate for underground networking. The benefit of the MI-WUSNs compared to other solutions (e.g. so-called Through-The-Earth communication) is related to the substantially lower path loss and lower vulnerability to the changes of the soil properties. In the past, some efforts...
Animal studies are often used to test the feasibility and effectiveness of neuroscience research ideas. Optogenetics is a state-of-the-art technique that allows researchers to control brain activity with light. Current methods are limited as they use tethered setups with the animal in a fixed position, resulting in stress and reduced animal welfare. Hence, an untethered setup is highly desirable.
This paper proposes and evaluates a two-dimensional wireless transmission sheet with enhanced power transmission characteristics. The sheet consists of three layers: a conducting base layer, a dielectric microwave propagation layer, and a surface layer with a conducting mesh of meander lines. The inductive mesh surface supports evanescent radiation for wireless coupling at any point on the sheet....
In this paper, a compact in-phase power divider integrated with bandpass responses in low temperature co-fired ceramic (LTCC) technology is presented. The proposed device is composed of three coupled half-wavelength resonators and an isolation resistor. Among them, one resonator acts as the common resonator and is symmetrically coupled to the other two using multiple broadside coupling. In this way,...
This paper presents the development of a hybrid Class-E synchronous rectifier for wireless powering of quad-copters through inductive power transfer. A synchronous rectifier relaxes the heatsink requirement for continuous operation as the transistor conduction losses will be lower than the diode conduction losses. This provides an advantage when the weight of the electronics is significant for the...
The conjugate image theory provides a methodology to determine the optimal circuit for a given wireless link. In this work, we compare the application of this theory between inductive and capacitive wireless power transfer, extended to non-symmetric configurations. We apply the conjugate image theory for mixed coupling and demonstrate that the results for inductive and capacitive coupling can be deduced...
This paper proposes that parasitic eddy currents can be utilized to facilitate and possibly enhance the power transfer capability of systems that utilize Near Field Magnetic Coupling (NFMC) for wireless charging. A proof of concept is provided where a receiver coil of diameter 27 mm harnesses more than 10W rectified power with greater than 60% AC-DC efficiency, while located within a dominantly metallic...
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