A Switched Filter Bank is a programmable module that integrates multiple filters (e.g., bandpass, low-pass, high-pass) with electronic switches. It enables rapid switching between different filter paths via external control signals, achieving dynamic frequency selection.

Usage Method:

1. Control Command: Send digital signals (e.g., TTL, GPIO, SPI) to the control interface to activate the target filter path within the switch matrix.
2. Signal Routing: The RF signal enters/exits through a common port, with only the selected filter path active while others remain highly isolated.
3. Dynamic Configuration: Adapt filtering characteristics in real-time based on system needs (e.g., frequency band switching, interference avoidance), replacing multiple discrete filters.

Typical Applications:

• Spectrum Analyzers: Automatically switch preselection filters to match scanning frequency bands.
• Multi-standard Base Stations: Dynamically adapt to process signals in different bands (e.g., 5G, 4G).
• Lab Test Systems: Enable automated multi-frequency testing to improve efficiency.
• Cognitive Radio: Intelligently select passbands based on spectrum sensing results.

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