Detector Log Video Amplifier, 0.5~10GHz, -60~0dBm, 14mV/dB

Detector Log Video Amplifiers (DLVAs) are a core signal conditioning component in modern RF and microwave systems. It directly performs peak detection on the input RF signal, logarithmically amplifies the resulting video voltage signal, and ultimately outputs a DC voltage that has a linear relationship with the input RF power. In simple terms, a detector log video amplifier is a linear converter from "RF power to DC voltage." Its core value lies in its ability to compress RF signals with a very large dynamic range into a more manageable, smaller-range DC voltage signal, thereby greatly simplifying subsequent signal processing tasks such as analog-to-digital conversion, comparison/decision-making, and display.

Features:

1. Ultra-wideband frequency coverage
The operational frequency range covers 0.5GHz to 10GHz, enabling application across a wide spectrum from L-band to X-band. A single unit can replace multiple narrowband devices, simplifying system design.
2. Exceptional dynamic range and sensitivity
It provides a wide dynamic range input from -60dBm to 0dBm. This means it can accurately measure signals ranging from extremely weak (-60dBm, nanowatt level) to relatively strong (0dBm, milliwatt level) simultaneously, making it ideal for capturing "small signals masked by large signals."
3. Accurate log linearity and consistency
It offers excellent log linearity across the entire dynamic range and frequency band. The output DC voltage maintains a strong linear relationship with the input RF power, ensuring accurate and reliable power measurement results. High consistency is achieved between channels (for multi-channel models) and across production batches.
4. Extremely fast response speed
It features nanosecond-level video rise/fall times and signal processing delay. It can rapidly track the envelope variations of pulse-modulated signals, meeting the real-time requirements of applications such as radar pulse analysis and electronic support measures (ESM).
5. High integration and reliability
Utilizing surface-mount technology and an integrated module design, it incorporates the detector, logarithmic amplifier, and temperature compensation circuitry within a compact, shielded housing. It exhibits good temperature stability and long-term operational reliability, suitable for demanding military and industrial environments.

Applications:

1. Electronic warfare (EW) and signals intelligence (SIGINT) systems
Electronic support measures (ESM): Serves as the front-end for radar warning receivers (RWR), quickly measuring, identifying, and locating the power of hostile radar signals for threat awareness and situational picture generation.
Electronic intelligence (ELINT): Precisely analyzes the pulse characteristics (pulse width, repetition frequency, power) of unknown radar signals for signal sorting and signature database development.
2. Spectrum monitoring and management systems
Monitors signal activity across a wide frequency band in real-time, accurately measuring the power levels of illegal interference signals or friendly signals. Used for spectrum situational visualization, interference source location, and spectrum compliance checking.
3. High-performance test and measurement instruments
Can be used as a critical power detection module in vector network analyzers (VNA), spectrum analyzers, or specialized test equipment, extending the instrument's dynamic range measurement capability, particularly excelling in pulse power measurement.
4. Radar systems
Used for monitoring automatic gain control (AGC) in radar receive channels, monitoring transmitter power output, or serving as a limiting and power detection unit at the front-end of digital receivers (DRx) to protect subsequent sensitive components.
5. Communications and laboratory R&D
Used for link power monitoring and calibration in broadband communication systems (e.g., satellite communications, 5G/mmWave R&D). In the laboratory, it is an efficient tool for pulse signal characteristic analysis and power sweep experiments.

Qualwave Inc. provides Detector Log Video Amplifiers that perfectly combine wide bandwidth, high sensitivity, fast response, and excellent linearity, with frequencies extending up to 40GHz.
This text introduces a Detector Log Video Amplifier with a frequency coverage of 0.5~10GHz.