cutoff frequency


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cutoff frequency

[′kət‚ȯf ‚frē·kwən·sē]
(electronics)
A frequency at which the attenuation of a device begins to increase sharply, such as the limiting frequency below which a traveling wave in a given mode cannot be maintained in a waveguide, or the frequency above which an electron tube loses efficiency rapidly. Also known as critical frequency; cutoff.
References in periodicals archive ?
When a signal consists of a true signal combined with noise, the residual will rise above the straight line as the cutoff frequency is reduced.
However, digital filters typically require the input signal to be uniformly sampled, in which case a crude 1st-order filter with high cutoff frequency can be applied analytically as in (9) to uniformly sample the signal at a high rate, whereupon a higher-order digital filter with better characteristics can be used.
The unsprung vertical velocity used by the control adopted a high pass filter with a cutoff frequency of 0.
The estimated cutoff frequency that separates desired signal contents and noise is determined.
This procedure is only valid below the plane wave cutoff frequency.
Based on the measured data, Mouratidis and Becker (2003) developed separate empirical equations for below and above the plane wave cutoff frequency respectively.
DRGH design is divided into 4 parts: characteristic impedance calculation of ridged waveguides by transverse resonant method combined with the calculation method in [14-16], the design of the reflection cavitydesign of the ridged structure extending form the waveguide port to the horn apertureand structure optimization which includes analysis of phase error distribution at the antenna aperture, design of dielectric lens according to the structure, analysis of ridged waveguide and design of slot loading on ridges for lowering the cutoff frequency of the dominant mode ([TE.
To supplement the original EMD, the LPF whose cutoff frequency is selected as the detected fundamental chopping frequency is inserted as a preprocessor.
The procedure of designing a TM polarizer with cutoff frequency of 10 GHz and bandwidth of 2 GHz is explained.
We would have preferred to make the waveguide width as wide as possible, since the effective refractive index and the cutoff frequency of the loaded waveguide were not known at this stage.
High-frequency graphene transistors with the intrinsic cutoff frequency up to 300 GHz have been demonstrated.