Inport
Converts the input signal into an RF signal.
blockType: SubSystem
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Path in the library: |
Description
Block Inport imports incoming signals for use in the simulation environment on the library envelope RF Blockset. You can also modulate the input signal to a square carrier wave in a simulation environment on the envelope of the library RF Blockset.
Complex input signals they represent modulation at frequencies specified in the parameter Carrier frequencies the block. The input port converts complex input signals into an RF signal suitable for multiband simulation:
Parameter Source type Defines the input signal as current, voltage, or power supply. Block icon Inport varies depending on the type of source. This table shows how the icons of this block change depending on the type of source that was set in the parameter Source type this block.
Source type: Ideal voltage |
Source type: Ideal current |
Source type: Power |
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Ports
Input
#
SL
—
Input signal
scalar | vector
Details
The input signal.
The Source type parameter defines the input signal as current, voltage, or power supply.
| Data types |
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| Complex numbers support |
Yes |
Conserving
#
RF+
—
Output signal
electricity
Details
The electrical port corresponding to the positive terminal of the RF circuit.
| Program usage name |
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RF-
—
Output signal
electricity
Details
The electrical port corresponding to the negative terminal of the RF circuit.
| Program usage name |
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Parameters
Parameters
#
Source type —
interpretation of the input signal
Ideal voltage | Ideal current | Power
Details
Determine the input signal:
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Ideal voltage— the unit outputs input signals in the form of voltage signals in the environment RF Blockset. If this option is selected, it is necessary to manually add the serial internal resistance of the source in order to match the blocks connected to the input port. The following figure shows the internal configuration of the unit.
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Ideal current— the block outputs input signals in the form of current signals in the environment RF Blockset. If this option is selected, the parallel internal resistance of the source must be manually added to match the blocks connected to the input port. The following figure shows the internal configuration of the unit.
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Power— the block interprets the signals. as available power, and internally uses a voltage source and a series resistance. If this option is selected, the input port automatically adds the source resistance to the circuit, as shown in the figure.
Voltage is the scaling of the input signal :
where – parameter value Source impedance (Ohm).
The generator provides active power to the load :
when This generator provides the available power .
| Values |
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| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Source impedance (Ohm) — source resistance for power matching
Details
The resistance of the power matching source, specified as a vector of positive integers, in ohms.
Dependencies
To use this parameter, set for the parameter Source type the Power value.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Carrier frequencies — carrier frequencies
Details
Carrier frequencies specified as a vector or scalar in Hz, kHz, MHz, or GHz. If the check box is selected Use Square Wave, the value of the parameter Carrier frequencies must be set as a positive scalar. The carrier frequencies are a combination of the fundamental tones and the corresponding harmonics in the block Configuration.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Use Square Wave — the option of using a square carrier wave
Details
Select this option to modulate the input signal to a square carrier wave.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Number of Fourier Coefficients — number of Fourier coefficients
Details
The number of Fourier coefficients required to modulate the input signal to a square carrier wave is set as an integer greater than or equal to `1'.
Dependencies
To use this option, check the box Use Square Wave.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# DC Bias — direct current displacement
Details
The DC offset, specified as a real number.
Dependencies
To use this option, check the box Use Square Wave.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Duty Cycle (%) — borehole of a square carrier wave
Details
The borehole of a square carrier wave, specified as a positive integer between 0 and `100', in %.
Dependencies
To use this option, check the box Use Square Wave.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Ground and hide negative terminal — ground the terminals of the RF circuit
Details
Check this box to ground and hide the negative terminals. Uncheck this option to open the negative terminals for connection to other components of the model.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
Learn more
Modeling of a multiband envelope
Details
Using the block Inport You can specify complex envelopes of input signals and import them as RF signals to simulate multiband signals.
Block Configuration Automatically detects the basic tones specified in the input ports and suggests the appropriate harmonic order to reflect the nonlinearity of the system. You can also manually specify the harmonic order for each pitch when modeling.
You can specify any number of carrier frequencies. It is recommended to choose between the simulation bandwidth (inversely proportional to the simulation time step) and the total number of simulation frequencies.
The illustration shows the modeling of an envelope with several carriers. In this illustration, the complex envelope of the modulated input signals consists of carriers, the envelope of the circuit consists of harmonic tones, and the complex envelope around the selected carrier consists of the envelope of the signal.
