Cavity filters and dielectric filters are the most commonly used types of filters in communication base stations. Among them, cavity filters are the most widely applied in macro base station systems, especially in RF front-end and combiner systems, where they are used for frequency selection and interference suppression.

Cavity filters are the most common because they offer high Q factor, low insertion loss, and high power handling capability. The transmitter section of a base station operates at relatively high power levels, requiring strong stability and reliability. Cavity filters use metal resonant cavity structures, which provide low loss and excellent heat dissipation, allowing stable performance during long-term high-power operation. Therefore, they dominate in traditional macro base stations.

With the trend toward miniaturization and multi-band development, dielectric filters and LTCC filters are also being used more frequently. Dielectric filters have smaller size and good frequency stability, making them suitable for mid- to high-frequency bands, while LTCC filters are well suited for compact base stations or integrated RF modules. Overall, in most high-power macro base stations, cavity filters remain the mainstream choice.

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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