The reliability of cavity bandpass filters is affected by various environmental factors, mainly including:

Temperature variations: Temperature fluctuations cause expansion or contraction of cavity materials, altering resonator dimensions and thereby affecting center frequency and bandwidth characteristics.

Humidity and condensation: High humidity environments may lead to internal component corrosion or surface oxidation, and in extreme cases cause condensation, significantly impacting filter performance.

Mechanical vibration and shock: Physical vibrations may cause tuning element displacement or internal connection loosening, changing filter characteristics.

Pressure changes: For designs with insufficient airtightness, pressure variations may alter the dielectric properties inside the cavity.

Dust and contaminants: Particle accumulation may change surface conductivity characteristics or cause short circuits between components.

Electromagnetic interference (EMI): Strong electromagnetic fields may induce nonlinear effects or saturation in the filter.

Salt spray (coastal environments): Accelerates corrosion of metal components, particularly significantly affecting aluminum cavities.

Yun Micro, as the professional manufacturer of rf passive components, can offer the cavity filters up 40GHz,which include band pass filter, low pass filter, high pass filter, band stop filter.

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