How to select an RF Bias Tee
Bias tees are used for setting the DC bias points (bias current or voltage) for high frequency circuits without interfering with the existing signal. It is a 3 port device, the low frequency port is used to set the bias while the high frequency port passes the RF signal.
The key specifications to look for when looking for an rf or microwave bias tees are:
Frequency (MHz): This is the frequency up to which the bias tee can be used to set the bias points of a circuit. This is usually regulated by the type of connector used.
Connector: Connectors need to be selected based on the application of the bias tee, the two key attributes to keep in mind when selecting a connector are the Impedance and frequency of the system.
Applications: Bias tees are used for both low current application and high current applications.
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Low current bias tees: These use a resistor to provide the connection between the DC input and the center contact of the coaxial cable.
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High current bias tees: These use an inductor to provide the connection between the DC input and the center contact of the coaxial cable. An inductor is used over a resistor in high current bias tees, to minimize power dissipation.
everything RF lets you search for rf bias tees specification from multiple manufacturers. You no longer need to search through individual supplier websites or catalogs to find a bias tee that meets your requirements.