Your Key Questions Answered
A solid grasp of RF test and and measurement fundamentals is crucial for accurate results. While this page addresses a few common RF test and measurement frequently asked questions, from video bandwidth and rise time to pulsed RF signals and statistical measurements, questions regarding high-power radar amplifier testing are answered in our application note available now for download: “GaN or GaAs, TWT or Klystron – Testing High-power Amplifiers for RADAR Signals using Peak Power Meters.”
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Insight into Common RF Test & Measurement Questions
Our RF & Microwave FAQ page addresses common questions related to the fundamentals of power measurement with direct, straightforward responses. Check out this dedicated resource for quick and convenient power measurement answers.
Why is it necessary to measure RF power of a system?
From radar to 5G communications networks, common use-cases that require measuring the RF power of a system include proof-of-design, satisfying regulatory specifications, adhering to safety limits to protect against the dangers of high-power RF radiation, system efficiency, and component protection.
What is the video bandwidth of a power sensor?
Video bandwidth describes the frequency range that a sensor can track a signal’s fluctuations in envelope power.
What is rise time?
Rise time is the time interval for a signal’s leading edge to change or rise from a certain low value (e.g., 10% of the pulse magnitude) to a certain high value (e.g., 90% of the pulse magnitude).
How does pulse width affect a radar’s range?
Pulses that are “on” for long periods of time are more susceptible to pulse distortions such as droop, which ultimately affect system performance. For example, next-generation radar systems transmit long pulse width signals. Range will be reduced and target acquisition time affected if the highest level of waveform fidelity isn’t maintained.
How do you test the high-power radar amplifiers?
Pulsed radar signals are “on” for a short time followed by a long “off” period. During “on” time, the system transmits anywhere from
kilowatts to megawatts of power. The high-power pulsing can stress the power amplifier (PA) in a number of ways both during the on/off
transitions and during prolonged “on” periods. Given the time domain nature of the pulsed RF signal, the best way to observe the
performance of the amplifier is through time domain signal analysis.
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Want to Learn More?
Read our App Note
Understand why a peak power meter is ideal for characterizing the behavior of pulsed RF PAs used in radar systems, and download this informative resource today.