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PM_UnwrapDemodTuned (PM Unwrapped Demodulator, Tuned)

Symbol

Available in ADS

Parameters

Name

Description

Units

Default

Sensitivity

Demodulation sensitivity, in deg/Volt

deg

10

Fnom

Nominal input frequency

GHz

1

MaxAngle

Unwrapped phase angle range (+/− MaxAngle)

deg

3600

Notes/Equations
  1. This is a tuned demodulator that selects the input harmonic closest to the specified Fnom frequency and generates a baseband output signal equal to the instantaneous unwrapped phase of the selected carrier frequency.
    If there is no analysis harmonic frequency close enough to the Fnom frequency, a warning is issued and the output is 0. The input impedance is infinite. The output impedance is 0.
  2. The phase range of this demodulator is equal to ± MaxAngle. The phase at time 0 is set equal to the normal 180° phase of the selected carrier frequency. By tracking modulo 360° phase transitions, the unwrapped phase, relative to the initial time 0 value, is calculated. The user can then set the desired modulo range with the MaxAngle parameter. A large number will generate totally unwrapped phase.
    This unwrapping of phase works for time sweeps in envelope analyses; it cannot be used to unwrap the phase of frequency or other parameter sweeps.
  3. In transient and baseband envelope simulations, this model does not generate the expected results because the imaginary part of baseband signals is 0.
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