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Analysis of cutoff characteristic for TE wave and TM wave is very important to design the geometry of structure (the angle of the cones) for TEM cell. In the paper, take the co-conical line for example. The half angle of inner conical conductor is 10° and that of outer conical conductor is 1.893°. An iteration method programmed in Matlab is used to solve the roots of the transcendental functions....
In this paper, an algorithm for obtaining load flow solutions for radial systems having generation based on renewable energy have been presented. These renewable distributed generations (DG) in the radial distribution system are modeled as active power and voltage magnitude specified buses (PV) and complex power specified buses (PQ). This method uses an improved backward forward sweep method where...
In this paper, a novel non-conformal non-overlapping integral equation domain decomposition method with impedance boundary condition (IE-DDM-IBC) is presented to simulate the EM scattering from thin coating objects. By using the Robin transmission condition, the original object can be decomposed into several non-overlapping closed sub-domains, and each sub-domain can be meshed independently. It also...
Antenna arrays are recognized as ubiquitous communication devices utilized in a significant number of applications. Subarrays have been used to improve array processing. This paper process an integrated decoupling and matching network for a 3-element compact array. A prototype has been fabricated to verify the theory.
Due to the focus on clean and green environment, the interest on electrification of existing transportation system is increasing. In Hybrid Electric Vehicle (HEV), the "idle-stop" and hence fuel economy is achieved by using integrated starter generator (ISG). This paper discusses the comparative evaluation of active bidirectional converter based ISG and passive quasi-Z source inverter (qZSI)...
There is a growing need for effective and adaptive robot-assisted rehabilitation platforms for post-stroke patients which can facilitate considerably their sensorimotor control performance, and also ensure safety for the patients.
This paper demonstrates some fundamentals concerning the study of the Fractional order Transmission Line (FTL) operation. A numerical algorithm applied to study the transient analysis is shown describing the abnormal diffusion that appears in the operation of the TL. According to the steady state analysis of the FTL operation, the superior advantages over the conventional domain of imposing the fractional...
Most of electric circuits can be viewed as a two port network with two terminals defined as input and output ports. In this paper, two different concepts are combined together which are the two port network concept and the fractional calculus to design a general fractional order two port network with equal order. An oscillator case study with three impedances structure has been presented. The three...
Obtaining the characteristics of a channel plays an important role in communication. Power lines are very different from other channels available and characterized by time variant notches that make it a harsh media for data transfer. Predetermination of the transfer function is required in many mitigation schemes of communication. In this work, a novel method is described to estimate the transfer...
A dual-band matching network using dual-band coupled line based quarter-wave line is presented. The proposed matching network is capable of providing simultaneous match for frequency-dependent complex loads having different values at two arbitrary frequencies to Z0 (here, 50Ω). A very simple step-wise evolution of the transformer is shown and closed form design equations are obtained. It is to be...
It is a general belief that voltage and current values are essential for calculating powers in circuit elements. We show that this belief is not justified in networks driven by power sources. We derive relation between injected powers and its constant fractions that are consumed in the circuit elements. Phasor (voltage and current) variables do not appear in this analytical expression. Injected power,...
Identification of the induction machine substituting circuit parameters is very difficult despite the fact that induction machines are the simplest of all. This is caused by the fact that electrical quantities cannot be measured in the rotor cage. In addition there is proved in the literature, that classical Γ-network includes too much freedom degrees (i.e. 4), therefore it cannot be identified unequivocally...
A novel method for the calculation of the mutual coupling between radiators in antenna arrays is presented. The proposed methodology includes the analysis of the radiation pattern of a single radiator. An algorithm based on the calculation of real and imaginary parts of the antenna mutual impedance using the Poynting's Theorem and the Kramers - Kronig relations is demonstrated. Validation is performed...
In the design of high complexity systems, the significance of signal integrity plays a vital role and in turn depends on the occurrence of different noises such as crosstalk noise, reflection noise, switching noises and active periodic noise. These noises are more in the design of IC, PCB layout design and multilayered PCB. However the impact of Simultaneous Switching Noise (SSN) noises in a IC with...
The interest of series elastic actuators (SEAs) for legged robots has recently increased to achieve compliant interactions and efficient gaits. However, control of legged robots with SEAs is difficult due to the need to design controllers that take into account both torque and impedance feedback loops. The work presented here addresses this issue by proposing a critically-damped fourth order system...
As the distributed generators are connected together through inverter interface in the microgrid, the control of the control of the interface inverter has an important influence on the operating performance of microgrid. In the paper, the study focuses on the control of the interfaced inverter, when microgrid operates in the islanded mode. In order to make the microgrid property similar to the utility...
The paper proposes novel voltage-mode quadrature oscillator employing modern active elements VD-DIBA (Voltage Differencing Differential Input Buffered Amplifier). The circuit utilizes only two active elements and two grounded capacitors. Frequency of oscillation and oscillation condition can be controlled orthogonally, thus without violating each other. The proposed circuit was experimentally verified...
This paper investigated the effects of temperature on resonance properties of Film Bulk Acoustic Resonator (FBAR) in thickness-stretch mode. Based on the fundamental piezoelastic equations of piezoelectric material, the vibration equation of ideal FBAR under sine excitation voltage is derived. The solution is then obtained by using of the boundary conditions. The series and parallel resonance frequency...
Inductive Power Transfer (IPT) techniques are gaining more and more interest in wireless power systems. The knowledge of the coupling factor of transmitter (TX) and receiver (RX) coil is a crucial, but mostly during operation not available parameter for such systems. In this manuscript a novel method to determine the coupling factor by measuring the self-resonating frequency of the postringing signal...
The goal of this paper is to present a method to anticipate the fault current that may occurs in the power networks. The method consists in the surveillance of the fault current slope. Comparing its value with the accepted overload current slope is possible to command the circuit breaker before the current rich a dangerous value.)
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