waveguide_data |
struct with fields described in waveguide_data table |
Data required for modeling the waveguide sections. |
elec_eq_ckt_data
|
struct with fields described in elec_eq_ckt_data |
Data required for modeling the electrical equivalent circuit for accurate electro-optic simulations. For more information on the electrical equivalent circuit, see phase_shifter_electrical - CML Compiler Model. |
elec_eq_ckt_data
In order to model the electrical equivalent circuit for the electrical phase shifter, either a travelling wave model or a lumped model may be used. The model type used is determined by the inclusion or exclusion of the electrical termination port in "ports" section.
Lumped Model
This data will only be used if the travelling wave electrode is disabled, which is done by not including the electrical termination port (ele_term). The RC data within this section is used to construct an electrical equivalent circuit which captures the bandwidth and loading effects of the electrical phase shifters when the compact model is simulated using Cadence Spectre. When the compact model is used standalone in INTERCONNECT, the electrical bandwidth is captured by an INTERCONNECT electrical low pass filter, which has a 3dB cut-off frequency calculated based on the RC data described in this section. The RC parameter data is optional, and if not provided, it will be automatically back-calculated based on the device’s bandwidth_data by CML Compiler.
For more information on the equivalent circuit for the depletion mode phase shifter, see Electrical Equivalent Circuit in photonic model page.
Field | Type | Description |
---|---|---|
Cj_data |
struct |
Junction capacitance (F) of the electrical phase shifter as a function of bias voltage, and the required fields are:
Note: Junction capacitance must be provided for at least 2 bias points. |
Rj |
number |
Junction resistance (\(\Omega \cdot m\)) of the phase shifter |
Rp |
number |
Contact resistance (\(\Omega)\) of the metal pad |
Cp |
umber |
Parasitic capacitance (F) between metal pads |
Travelling Wave Electrode
This data will only be used if the travelling wave electrode is enabled, which is done by including the electrical termination port (ele_term).
Note: These travelling wave parameters will not be used for Verilog-A models.
Field | Type | Description |
---|---|---|
loss_RF | number | Microwave loss (dB/m) of the travelling wave electrode. |
f0_RF | number | Central RF frequency of operation (Hz) |
R0 | number | Characteristic resistance (\(\Omega\)) of the traveling wave electrode |
X0 | number | Characteristic reactance (\(\Omega\)) of the traveling wave electrode |
Rs | number | Source resistance (\(\Omega\)) for the traveling wave electrode model |
Xs | number | Source reactance (\(\Omega\)) for the traveling wave electrode model |
Rj | number | Junction resistance (\(\Omega \cdot m\)) of the electrical phase shifter |
n_RF | number | Microwave index of the traveling wave electrode |
Rl_top | number | Terminating resistance (\(\Omega\)) of the top electrode |
Xl_top | number | Terminating reactance (\(\Omega\)) of the top electrode |
Rl_bottom | number | Terminating resistance (\(\Omega\)) of the bottom electrode |
Xl_bottom | number | Terminating reactance (\(\Omega\)) of the bottom electrode |
Cj | matrix |
Junction capacitance (F) of the electrical phase shifter as a function of bias voltage, and the required fields are:
|
waveguide_data
Note: The fields are only required for waveguide sections with non-zero length. See Internal Model Diagram in photonic model page for a diagram showing the role of each section.
Field | Type | Description |
---|---|---|
wavelength |
number |
Center wavelength (m) of the band for which the mode properties are provided. |
temperature |
number |
Temperature (K) for which the mode properties below are provided. |
waveguide_passive_right
|
struct with fields described in table below
|
Mode properties for modeling the right and left passive waveguide sections |
waveguide_passive_left
|
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waveguide_transition_right
|
Mode properties for modeling the right and left passive to electrically active transition waveguide sections |
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waveguide_transition_left
|
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waveguide_phase_shifter
|
Mode properties for modeling the electrical phase shifter waveguide section at 0 V bias |