Home
Back
Tee Attenuator Equations:
| From: | To: |
A Tee attenuator is a specific type of resistive network that reduces signal power by a known amount while maintaining impedance matching. It's called "Tee" because of its T-shaped configuration with two series resistors and one shunt resistor.
The calculator uses the Tee attenuator equations:
Where:
Explanation: The equations calculate the resistor values needed to achieve the specified attenuation while maintaining impedance matching at both ports.
Details: Attenuators are crucial in RF and audio systems to control signal levels, prevent overload, improve impedance matching, and reduce signal reflections.
Tips: Enter the characteristic impedance of your system (typically 50 or 75 ohms for RF systems) and the desired attenuation in dB. All values must be positive numbers.
Q1: What's the difference between Tee and Pi attenuators?
A: Tee attenuators have two series resistors and one shunt resistor, while Pi attenuators have one series resistor and two shunt resistors. They achieve the same function but with different configurations.
Q2: What's the maximum attenuation possible?
A: In theory, infinite, but practical limitations of resistor values and parasitic effects limit very high attenuations. For >30dB, multiple attenuators in series are often better.
Q3: How accurate are these calculations?
A: The calculations are mathematically precise, but real-world performance depends on resistor tolerance, frequency effects, and proper construction.
Q4: Can I use standard resistors?
A: For low frequencies, yes. For RF applications, specially designed RF resistors with proper parasitics should be used.
Q5: What about power handling?
A: The power dissipated in the resistors increases with signal power. Choose resistors with appropriate power ratings for your application.