Mutual coupling, or equivalently, the isolation between antennas, is a key parameter in antenna system design. In this article, previously defined impedance density generalized, and it demonstrated how can be used to obtain spatial information about mutual coupling. The generalized real-valued scalar visualized as three-dimensional (3-D) space. It shown that there strong connection regions with...

The indirect two-port reflection method for measuring antenna impedances is reviewed using scattering parameter techniques and developed into a more accurate low perturbation optically coupled transmission measurement. This transmission measurement infers the antenna impedance by measuring the voltage induced in a number of loads connected to the antenna port with reference to the antenna used ...

the purpose of this study is to investigate the relationshipbetween the mutual funds flows and the return of stock index using 65mutual funds in the period of 2008 to 2011.in this study, the dailychanges of the total number of units of mutual funds and the changesof the total values of units of mutual funds were considered as acriteria for the net of mutual funds flows. the results of johansen ...

measurement of the stroke volume and its changes over time can be very helpful for diagnosis of dysfunctions in the blood circulatory system and monitoring their treatments. impedance cardiography (icg) is a simple method of measuring the stroke volume based on changes in the instantaneous mean impedanceof the thorax. this method has received much attention in the last two decades because it is...

Abstract We developed a two-coupled resonant-tunneling-diode (RTD) terahertz (THz) oscillator with high output power to fill the THz gap. arranged two RTD mesas in low-loss air-bridged transmission line for strong mutual coupling and generation of unique operation mode integrated planar ring-slot antenna efficient radiation while satisfying impedance matching condition. The device structure was...

A scientific approach to calculating the parameters and characteristics of an asynchronous motor in inter-turn short circuit mode one phase stator is proposed create foundations a diagnostic complex for assessing condition motors transport infrastructure. This consists fact that model with which research carried out, it take into account changes mutual inductance when AC impedance phases change...

We present an $LC$ circuit model that supports a tilted ``Dirac cone'' in its spectrum. The tilt of the Dirac cone is specified by parameters consisting mutual inductance between neighboring sites and capacitance ${C}_{0}$ at every lattice site. These can be completely measured impedance spectroscopy. Given described background spacetime metric, spectroscopy perfectly provide (local) informatio...

studies show that any complications including hemorrhage, lack of blood supply, lack of oxygen supply, and death of cells in a tissue, will have a clear effect on electrical properties of that tissue. thus, by measuring impedance of a set of tissues, potential problems of the damaged tissue may be found. since electrical impedance is closely related to the measuring frequency, obviously, every ...

Computations to obtain the mutual information that is in nominal data are usually difficult, and there will always be more redundancy in a nominal dataset, which means that an efficient nominal-data feature selection method is difficult to find. In this paper, a nominal-data feature selection method based on mutual information without data transformation, called the redundancy-removing more rel...