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Switch-mode power supplies are efficient. But they are noisy. In RF systems, unmanaged ripple from switching regulators can increase phase jitter, degrade return loss, and reduce link margin.

In Canada’s telecom, aerospace, and defense sectors, compliance and environmental stress make this issue more pronounced.

Where the Interference Comes From

SMPS units operate at high switching frequencies. That energy can couple into RF paths through:

• Inadequate shielding
• Ground loop formation
• Long cable routing
• Poor impedance control

Even small impedance variations can shift phase response in precision systems.

A properly engineered SMPS Cable assembly must mitigate both conducted and radiated noise. Shield braid density, dielectric consistency, and insertion loss characteristics directly affect performance stability.

Why Phase Stability Is Critical

In radar calibration, 5G infrastructure, and satellite ground stations, phase drift affects timing accuracy. Even minor deviations can compromise measurement repeatability.

Manufacturers like Flexi RF Inc, a global producer of RF and microwave components serving Canada and international markets, focus on low-loss, phase-stable assemblies built for electrically noisy environments.

Engineers assessing long-term reliability under switching power exposure can review technical configurations in the SMPS Cable category to understand how shielding effectiveness and phase consistency are maintained in demanding RF applications.

Stable power pathways directly support stable RF performance.