Why the Same Type of Signal Jammer Works Differently — Depending on the Manufacturer ?

Many users are puzzled when two signal jammers of the same model type perform differently in practice. Both may look identical, use similar antennas, and operate in the same environment—yet one blocks signals across an entire area, while the other barely reaches a few meters. The reason often lies in an overlooked technical detail: the frequency bandwidth preset by the manufacturer.

1. Bandwidth Determines How Power Is Used

A jammer's job is to interfere with communication signals by broadcasting noise across specific frequency bands. However, the bandwidth of those bands—how wide a slice of the spectrum the jammer covers—has a major effect on performance.

Manufacturers can configure their devices to cover a wider frequency range, which increases compatibility but spreads the available power more thinly. The result is a shorter effective blocking distance.

Others set a narrower bandwidth, concentrating energy within a smaller portion of the spectrum. This makes the interference stronger and allows the jammer to block signals from farther away.

In short: the narrower the bandwidth, the greater the range.

2. Why Different Manufacturers Produce Different Results ?

Even when two devices share the same model name or specification, each manufacturer may tune the internal circuit and frequency bandwidth differently.

• Some brands prioritize coverage, adjusting the jammer to handle more bands such as 2G, 3G, 4G, 5G, Wi-Fi, and GPS.
• Others aim for range and stability, narrowing the operating frequency to boost interference strength.
• The choice of components, antenna design, and calibration standards also play a role in how the jammer's energy is distributed.

This is why two jammers labeled the same can behave very differently in the real world.

3. Practical Implications for Users

When evaluating performance, users often assume that all signal Blockers of a certain type should behave the same. In reality, the manufacturer's frequency configuration can completely change the result.

To achieve better performance:

• Check the bandwidth range specified by the manufacturer, not just the model name.
• If you need a longer blocking distance, choose a device with a narrower frequency band.
• For environments requiring multi-signal coverage, a broader-band jammer is more practical but will have a shorter reach per band.
• Always test the device in its intended environment, as surrounding signal strength and obstacles will further affect results.

4. The Technical Reason Behind the Difference

A jammer's total output power is limited. The broader its frequency coverage, the more that power must be divided across multiple bands. That means less energy per frequency and a weaker interference field.
A narrower range, by contrast, focuses power like a spotlight beam—stronger, denser, and capable of reaching farther.

So even when everything else seems equal, the manufacturer's choice of bandwidth setting determines how effectively the jammer performs.

Conclusion

When two signal jammers of the same type show different blocking distances in the same place, the cause is rarely a defect. It's usually due to how each manufacturer has configured the frequency bandwidth. A broader range means more compatibility but less distance; a narrower range means stronger, more focused interference. Understanding this helps users choose the right device and set realistic performance expectations.