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RF Resistors

RF resistors provide controlled resistance for terminations, attenuators, bias networks and load paths. They are used where impedance accuracy, power dissipation, frequency behavior and package parasitics affect circuit stability.

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RF Resistors

FAQ

How should average power, peak power, duty cycle and temperature derating be specified for an RF load?

Average power predicts heating, while peak power and pulse width constrain electrical stress; both must be checked at the declared mounting temperature and cooling condition.

How are RF termination return loss, VSWR, reflection coefficient and mismatch loss related?

Return loss and VSWR express the reflection coefficient at one reference plane; reflected power and mismatch loss follow from its magnitude.

Why must a passive RF impedance network have a defined reference plane and complex S-parameters?

The reference plane determines where impedance and waves are defined; complex S-parameters retain magnitude and phase needed to move planes, de-embed fixtures and predict network interaction.

Engineering inquiry

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RF Resistors

RF resistors dissipate energy and define controlled resistance in high-frequency circuits. They appear in terminations, fixed attenuators, pads, bias paths, feedback networks and load structures where impedance accuracy and parasitic inductance matter.

Engineering considerations

  • Resistance tolerance and temperature coefficient influence repeatability.
  • Power rating and thermal path determine safe dissipation under RF drive.
  • Return loss, frequency response and package geometry affect how the part behaves at microwave frequencies.

Typical use appears in measurement paths, amplifier feedback, attenuator networks, matching pads and controlled RF loads.