Continuous Comb Generators, Input Frequency 0.1~6GHz, Output Frequency 0.1~20GHz

A Continuous Comb Generator is a microwave signal source capable of producing equally spaced, highly stable spectral components over a wide frequency range. Its output spectrum resembles a "comb," where each spectral line features flat amplitude, phase correlation, and rich harmonic content. Unlike swept signal sources or noise sources, the comb generator provides numerous discrete frequency points simultaneously, serving as a "frequency ruler" or "excitation comb" for the system. Such devices are widely used in spectrum monitoring, receiver calibration, electromagnetic compatibility testing, and high-speed communication system evaluation.

Features:

1. Wide frequency coverage
The output fundamental frequency is adjustable, with harmonics extending across commonly used communication and radar bands. A single connection completes testing across multiple bands.
2. High spectral density and amplitude flatness
The relative power relationship among comb lines remains stable across the full band, with minimal amplitude fluctuation. Frequent self‑calibration is not required, allowing a spectrum analyzer to capture the entire band response in one acquisition.
3. High spectral purity
Based on a high‑stability internal reference or external reference input, measurement repeatability and spectral purity are ensured. Non‑harmonic spurs and spurious responses are effectively suppressed, avoiding misinterpretation.
4. Fast settling and uninterrupted output
After power‑on or parameter reconfiguration, the output reaches a stable state quickly. Signal continuity is maintained during frequency switching, making it suitable for swept measurements or real‑time monitoring systems.
5. Compact and modular design
The small‑form‑factor device supports multiple powering options and provides remote control interfaces with a standard command set, facilitating integration into automated test systems.

Applications:

1. Receiver in‑band flatness calibration
Inject all frequency combs simultaneously, compare the known output with the receiver response, and quickly correct the channel frequency response over a wide bandwidth.
2. EMI/EMC pre‑compliance testing
Serve as a reference interference source to verify the dynamic range of the receive path, helping to identify abnormal absorption or resonance points in the system.
3. Broadband component performance verification
Paired with a spectrum analyzer, quickly assess the in‑band consistency and harmonic characteristics of broadband passive or active devices such as filters, amplifiers, and cables.

Qualwave Inc. offers Comb Generators that combine wide bandwidth, high sensitivity, fast response, and excellent linearity, with input frequencies up to 6GHz. This article introduces a Continuous Comb Generator covering an input frequency range of 0.1~6GHz, balancing fundamental and harmonic performance with portability and high output flatness.