This paper describes the application of Harmonic Balance algorithms to predict nonlinear effects in planar High Temperature Superconductors (HTS) microwave circuits. The resulting algorithms are fast and efficient and can be used both for the characterization of the nonlinearities in the HTS material, and for the prediction of the behavior of an HTS circuit given the parameters of these nonline...

This paper reviews the direct stiffness method for the calculation of harmonic and transient wave propagation in horizontally layered media. Developed in the early eighties by Kausel and Roësset, this method has become a standard tool for the computation of the Green’s functions in layered media. As it is based on a superposition of plane harmonic waves in the frequency-wavenumber domain, it is...

In this paper, a design and fabrication of a miniaturized 2.5 GHz 8 W power amplifier using selectively anodized aluminum oxide(SAAO) substrate are presented. The process of SAAO substrate is recently proposed and patented by Wavenics Inc. which uses aluminum as wafer. The selected active device is a commercially available GaN HEMT chip of TriQuint company, which is recently released. The optim...

The design and optimization of an annular ring dielectric resonator antenna (DRA) operating in the C frequency band is addressed. The DRA is intended to be used as the radiating element of a transmitting array of active integrated antennas, its input impedance must exhibit a proper resistive load at the fundamental resonance frequency, as well as a dominant reactive behavior, either inductive o...

Three-Phase four-wire distribution systems are facing severe power quality problems such as poor voltage regulation, high reactive power and harmonics current burden, load unbalancing, excessive neutral current, etc.This creates excessive neutral current both of fundamental and harmonic frequency and the neutral conductor gets overloaded. By integrating phase shifting into an extremely low zero...

We discuss the microwave second-harmonic generation in high-density bulk MgB2, prepared by the reactive liquid Mg infiltration technology. The intensity of the harmonic signal has been investigated as a function of temperature and amplitudes of the DC and microwave magnetic fields. The results are discussed in the framework of a phenomenological theory, based on the two-fluid model, which assum...

This paper describes an original way of dealing with the measuring and modeling of microwave transistor nonlinear behavior. Although generalizations are possible, the method described in this particular paper deals with transistor behavior under a large signal one-tone excitation, with arbitrary impedance terminations for the fundamental and the harmonics. First the mathematical theory of the “...

In this article, a distributed-swing-boosting and harmonic-impedance-expanding multi-core oscillator is proposed to achieve low phase noise high figure-of-merit (FoM), simultaneously. First, distributed-coupling topology introduced reduce the chip area with no mode ambiguity. Then, structure developed boost gate swing square-like waveform of $V_{\text...

For several reasons, particularly due to the mismatch in feeder impedance, accurate power sharing islanded microgrids is a challenging task. To get around this problem, distributed event-triggered control strategy proposed article. The suggested technique adaptively regulates virtual impedances at both fundamental positive/negative sequence and harmonic frequencies and, therefore, accurately sh...

Sensor nodes distributed over a large area can be used to collect environmental information such as chemical pollution. The sensed information can be communicated to a central location, without significant power consumption by the sensor nodes, by utilizing backscatter modulation. In this approach, a central source such as a radar illuminates the sensor nodes by microwave radiation. The reradia...