However, in this paper the Doppler frequency shift information is modulated into the transmit signal constellation for the purpose of direction-finding applications, different from papers [21-23] which utilize Doppler frequency shift effect of the phase center for the purpose of synthesizing the radiation pattern; ii) The RF directional modulation signal using a switched antenna array is proposed for communication and direction-finding applications, unlike paper  for the physical layer secure communication; iii) From the point view of signal modulation, each harmonic component
contains the same information as the fundamental frequency component, which is useful for wireless communication.
Each harmonic component
, as present at the terminals of the nonlinear device, should be exposed to a frequency invariant admittance.
The magnitude of the selected harmonic component
is calculated by the following equations
The proposed technique has been applied to the optimization of a 5-3 GHz RSO circuit with rational ratio r = M / N = 3 / 5, in which the 5th harmonic component
of the self-oscillation signal ([f.
If the particular circuit is the equivalent circuit of induction motor, the electromagnetic torques for each harmonic component
can be calculated in analogous way as they are calculated for the space harmonics.
n] are the RMS values of the nth harmonic component
of voltage and current respectively.
To tackle the aforementioned problems, the individual harmonic component
of load currents are decomposed by using the adaptive notch filter (ANF) in the synchronous reference frame (SRF), and the positive-sequence and negative-sequence components of individual harmonic components
are successfully decoupled.
Here, the difference between the k-th harmonic component
of indicated torque ([T.
where k is the number of the harmonic component
of the voltage and current curves, respectively; [v.
The cogging torque mainly include the 12-th harmonic component
due to the characteristics of stator that have 36 slots and 3 pole pairs.
The air gap magneto-motive force corresponding to the particular harmonic component
may be given as
According to the numerical analysis for the supporting rollers, it can be found that the vibration signal mainly includes the harmonic component
caused by the kiln crank and the harmonic component
caused by the deflection of the roller shaft.