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Model resistor for circuit envelope analysis

  • Library:
  • RF Blockset / Circuit Envelope / Elements

  • Resistor block


The Resistor block models a resistor within the RF Blockset™ circuit envelope simulation environment. For an introduction to RF simulation, see the example, Simulate High Frequency Components.

The block implements the relation



  • R represents the resistance, as a function of temperature.

  • i(t) represents the current through the capacitor at time t.

  • v(t) represents the voltage across the terminals of the capacitor at time t.

RF Blockset current and voltage signals consist of in-phase (Ik) and quadrature (Qk) components at each frequency fk specified in the Configuration block:


To learn how you can use the Resistor block to design output matching network, open RF Receiver Front End subsystem and select LinearOutput Matching in Radar System Modeling example.


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Resistance value , specified as a real number in ohms greater than zero. Specify the units of the resistance from the corresponding drop-down menu.

Select this parameter, to simulate thermal noise in a resistor. Then, in the Configuration block dialog box, also select the Simulate noise check box. By default, both Simulate noise check boxes are selected.

This parameter inserts a current noise source with the single-sided power density of 4 kT/R A2/Hz, where:

  • k is the Boltzmann constant

  • T is the value of the Temperature parameter, in degrees Kelvin. (Also located in the Configuration block.)