When using dielectric filters in high-power applications, several key issues must be considered. First, high-power signals generate significant dielectric loss inside the material, leading to temperature rise. If heat dissipation is insufficient, it may cause resonance frequency drift or even device failure. Therefore, low-loss dielectric materials should be selected, and thermal performance can be improved through metal housings, heat sinks, or thermal-conductive structures.

      Second, higher power results in stronger electric fields inside the resonator, increasing the risk of dielectric breakdown or surface discharge. To avoid this, the dielectric block surface should be smooth and free of sharp edges, and the resonator geometry should be optimized to reduce local field concentration.

      Finally, temperature variations under high power may cause shifts in the dielectric constant, leading to instability in the filter’s center frequency. Choosing materials with low temperature coefficients and incorporating frequency-compensation measures in the design can improve long-term reliability.

      Overall, in high-power scenarios, appropriate material selection, thermal management, and structural optimization are essential to ensure stable operation of dielectric filters.

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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