1: Differences in structure and materials

     Cavity filters typically use metal cavity structures and achieve filtering through cavity resonance. They are larger in size but offer extremely low loss. Dielectric filters, on the other hand, use high-permittivity ceramic blocks as resonators, generating the required frequency through dielectric resonance. They are significantly smaller and suitable for highly integrated applications.

2: Differences in performance
     Cavity filters provide very low insertion loss, high power-handling capability, and excellent selectivity, making them ideal for base stations, radar systems, and other high-performance scenarios. Dielectric filters have slightly higher insertion loss but still maintain good Q-factor and selectivity. Their key advantage is compact size, along with good temperature stability, meeting the needs of most wireless communication systems.

3: Differences in application scenarios
     Cavity filters are suited for high-power, long-distance communication systems or applications requiring high linearity. Dielectric filters are widely used in devices where miniaturization is critical, such as 5G small cells, indoor distribution systems, and wireless terminal modules. Therefore, choosing between them depends mainly on size, power, and performance requirements.

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.

Welcome to contact us: liyong@blmicrowave.com