FMULT is a behavioral representation of a frequency multiplier. The model converts a signal at frequency F0 to a signal at frequency NF0. The conversion gain is user-specified.
|N||Frequency multiplication factor||2|
|*F0||Input center frequency||Frequency||_FREQH1|
|*BW||Signal bandwidth as a % of input center frequency||25|
|*S11MAG||Input reflection coefficient (magnitude)||0|
|*S11ANG||Input reflection coefficient (phase)||0|
|*S22MAG||Output reflection coefficient (magnitude)||0|
|*S22ANG||Output reflection coefficient (phase)||0|
|Z0||Port impedance||Resistance||50 ohm|
|Pth||Input power threshold||Power (dB)||-10|
* indicates a secondary parameter
Parameter BW sets the model's passband for multitone operation. Set the parameter high enough to cover the bandwidth of the input signal.
The specified input and output impedances are valid for all frequencies. The input and output ports are AC-coupled.
This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.
Parameter Pthis extremely important for proper operation of the model. It should be set approximately 20 dB below the expected available input power. Values higher than 10 dB below input will result in incorrect conversion gain; values lower than 30 dB below input will result in slower convergence.
The model operates as a frequency mixer, with the local oscillator at frequency (N-1)F0 generated from the input signal by a clipping operation. The lower the value of Pth the harder the clipping and the slower the convergence. Conversely, the higher the value of Pth the softer the clipping, the smaller the amplitude of the local oscillator and the less accurate the conversion gain estimate