harmonic

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har·mon·ic

(har-mon'ik),
A component of complex sound, the frequency of which is a multiple of the fundamental frequency, which is also called the first harmonic; the second harmonic has twice the frequency of the fundamental, and so forth.

harmonic

In physics, concerning wave forms, an oscillation or frequency that is a whole number multiple of the basic frequency.
References in periodicals archive ?
The first harmonic frequency linearly increases as the rotation speed increases [4].
However, at the upper side operation band, the performance degrades if the rejected harmonic frequency is close to the operational frequency.
Because the harmonic frequency is considerably greater than the power system frequency, and the power grid is a complex system, the harmonics could be amplified and even to oscillate in some conditions.
The performance of the final design indicates a significant improvement in the insertion loss and return loss of the second band and able to remove harmonic frequency ([f.
In this case study, the procedure starts by initially optimising the fundamental load impedance only, and this value is used in optimising the input match, again initially neglecting harmonic frequency feedback.
However, these EBG structures are only effective for suppressing the second harmonic radiation due to their narrow rejection frequency bandwidth, and a spurious resonance occurs around the second harmonic frequency for one patch antenna from the measured results, indicating that the effect of harmonic suppression is not very satisfying.
When testing at a particular fundamental frequency, it is possible that the EUT could have susceptibility not at the fundamental but at the harmonic frequency.
The output-matching network usually resonates at the required harmonic frequency to reject unwanted harmonics.
The third edition states that the level of any harmonic frequency generated by the power amplifier and measured in the UFA must be at least 6 dB below that of the fundamental frequency.
When the proposed bias line is used in power amplifiers, the third as well as the second harmonics are reduced because of the increased slow-wave effect of the proposed bias line over a wide harmonic frequency band.
So if a TWTA produced 200 W at the fundamental frequency and 200 W at the first harmonic frequency, there would be no way of knowing that a major portion of the measured field strength was created at a bogus test frequency.