80 relations: Admittance, Alternating current, Angle, Angular frequency, Attenuator (electronics), Bandwidth (signal processing), Capacitance, Cartesian coordinate system, Characteristic admittance, Characteristic impedance, Circumference, Clockwise, Complex number, Complex plane, Conformal map, Constant (mathematics), Degree (angle), Dimension, Dimensionless quantity, Distributed element model, Electrical engineering, Electrical impedance, Electrical reactance, Electrical resistance and conductance, Electrical termination, Electronic oscillator, Equivalent circuit, Euler's formula, Exponential function, Frequency, Frequency band, George Ashley Campbell, Greek alphabet, Hertz, Hewlett-Packard, Imaginary number, Impedance matching, Inductance, Instantaneous phase, International System of Units, Inversive geometry, Locus (mathematics), Lumped element model, Magnitude (mathematics), Möbius transformation, Multiplicative inverse, Neper, Noise figure, Nomogram, Ohm, ..., Omega, Origin (mathematics), Passivity (engineering), Phillip Hagar Smith, Point (geometry), Propagation constant, Radian, Radio frequency, Radius, Reflection coefficient, Resultant, Riemann sphere, Scattering parameters, Second, Series and parallel circuits, Short circuit, Siemens (unit), Signal generator, Speed of light, Spiral, Stability theory, Standing wave, Susceptance, Table (information), Time, Transformation (function), Transmission line, Vibration, Wavelength, 1. Expand index (30 more) » « Shrink index
In electrical engineering, admittance is a measure of how easily a circuit or device will allow a current to flow.
Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.
In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
In physics, angular frequency ω (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate.
An attenuator is an electronic device that reduces the power of a signal without appreciably distorting its waveform.
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
Capacitance is the ratio of the change in an electric charge in a system to the corresponding change in its electric potential.
A Cartesian coordinate system is a coordinate system that specifies each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances to the point from two fixed perpendicular directed lines, measured in the same unit of length.
Characteristic admittance is the mathematical inverse of the characteristic impedance.
The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.
In geometry, the circumference (from Latin circumferentia, meaning "carrying around") of a circle is the (linear) distance around it.
Two-dimensional rotation can occur in two possible directions.
A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.
In mathematics, the complex plane or z-plane is a geometric representation of the complex numbers established by the real axis and the perpendicular imaginary axis.
In mathematics, a conformal map is a function that preserves angles locally.
In mathematics, the adjective constant means non-varying.
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.
In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it.
In dimensional analysis, a dimensionless quantity is a quantity to which no physical dimension is assigned.
In electrical engineering, the distributed element model or transmission line model of electrical circuits assumes that the attributes of the circuit (resistance, capacitance, and inductance) are distributed continuously throughout the material of the circuit.
Electrical engineering is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism.
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance.
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
In electronics, electrical termination is the practice of ending a transmission line with a device that matches the characteristic impedance of the line.
An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave.
In electrical engineering and science, an equivalent circuit refers to a theoretical circuit that retains all of the electrical characteristics of a given circuit.
Euler's formula, named after Leonhard Euler, is a mathematical formula in complex analysis that establishes the fundamental relationship between the trigonometric functions and the complex exponential function.
In mathematics, an exponential function is a function of the form in which the argument occurs as an exponent.
Frequency is the number of occurrences of a repeating event per unit of time.
A frequency band is an interval in the frequency domain, delimited by a lower frequency and an upper frequency.
George Ashley Campbell (November 27, 1870 – November 10, 1954) was an American engineer.
The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC.
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
The Hewlett-Packard Company (commonly referred to as HP) or shortened to Hewlett-Packard was an American multinational information technology company headquartered in Palo Alto, California.
An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit,j is usually used in Engineering contexts where i has other meanings (such as electrical current) which is defined by its property.
In electronics, impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding signal source to maximize the power transfer or minimize signal reflection from the load.
In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in electric current through it induces an electromotive force (voltage) in the conductor.
Instantaneous phase and instantaneous frequency are important concepts in signal processing that occur in the context of the representation and analysis of time-varying functions.
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
In geometry, inversive geometry is the study of those properties of figures that are preserved by a generalization of a type of transformation of the Euclidean plane, called inversion.
In geometry, a locus (plural: loci) (Latin word for "place", "location") is a set of all points (commonly, a line, a line segment, a curve or a surface), whose location satisfies or is determined by one or more specified conditions.
The lumped element model (also called lumped parameter model, or lumped component model) simplifies the description of the behaviour of spatially distributed physical systems into a topology consisting of discrete entities that approximate the behaviour of the distributed system under certain assumptions.
In mathematics, magnitude is the size of a mathematical object, a property which determines whether the object is larger or smaller than other objects of the same kind.
In geometry and complex analysis, a Möbius transformation of the complex plane is a rational function of the form of one complex variable z; here the coefficients a, b, c, d are complex numbers satisfying ad − bc ≠ 0.
In mathematics, a multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by x yields the multiplicative identity, 1.
The neper (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals.
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a signal chain.
A nomogram (from Greek νόμος nomos, "law" and γραμμή grammē, "line"), also called a nomograph, alignment chart or abaque, is a graphical calculating device, a two-dimensional diagram designed to allow the approximate graphical computation of a mathematical function.
The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.
Omega (capital: Ω, lowercase: ω; Greek ὦ, later ὦ μέγα, Modern Greek ωμέγα) is the 24th and last letter of the Greek alphabet.
In mathematics, the origin of a Euclidean space is a special point, usually denoted by the letter O, used as a fixed point of reference for the geometry of the surrounding space.
Passivity is a property of engineering systems, used in a variety of engineering disciplines, but most commonly found in analog electronics and control systems.
Phillip Hagar Smith (April 29, 1905; Lexington, Massachusetts – August 29, 1987; Berkeley Heights, New Jersey) was an electrical engineer, who became famous for his invention of the Smith chart.
In modern mathematics, a point refers usually to an element of some set called a space.
The propagation constant of a sinusoidal electromagnetic wave is a measure of the change undergone by the amplitude and phase of the wave as it propagates in a given direction.
The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.
Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.
In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium.
In mathematics, the resultant of two polynomials is a polynomial expression of their coefficients, which is equal to zero if and only if the polynomials have a common root (possibly in a field extension), or, equivalently, a common factor (over their field of coefficients).
In mathematics, the Riemann sphere, named after Bernhard Riemann, is a model of the extended complex plane, the complex plane plus a point at infinity.
Scattering parameters or S-parameters (the elements of a scattering matrix or S-matrix) describe the electrical behavior of linear electrical networks when undergoing various steady state stimuli by electrical signals.
The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.
Components of an electrical circuit or electronic circuit can be connected in many different ways.
A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or a very low electrical impedance.
The siemens (symbol: S) is the derived unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI).
A signal generator is an electronic device that generates repeating or non-repeating electronic signals in either the analog or the digital domain.
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
In mathematics, a spiral is a curve which emanates from a point, moving farther away as it revolves around the point.
In mathematics, stability theory addresses the stability of solutions of differential equations and of trajectories of dynamical systems under small perturbations of initial conditions.
In physics, a standing wave – also known as a stationary wave – is a wave which oscillates in time but whose peak amplitude profile does not move in space.
In electrical engineering, susceptance (B) is the imaginary part of admittance, where the real part is conductance.
A table is an arrangement of data in rows and columns, or possibly in a more complex structure.
Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future.
In mathematics, particularly in semigroup theory, a transformation is a function f that maps a set X to itself, i.e..
In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account.
Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point.
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
1 (one, also called unit, unity, and (multiplicative) identity) is a number, numeral, and glyph.