RF Cavity Filter

What is a cavity filter?

RF cavity filter is the essential circuitry behind a duplexer. It is a sharply tuned resonant circuit that allows only certain frequencies to pass. The resonant filters are utilized to pass the desired RF signals within a specified frequency range or reject RF signals within a range of frequencies. The resonant cavity inside can be made from strong materials, like extremely conductive and dimensionally stable metals, to perform dependably for a very long time.

Why Rfecho

Cavity Filter from RFecho is known for its low insertion loss and higher power handling ability. It is one of many types of RF filters and is one of the fundamental building blocks of modern communications systems.

RFecho manufactures premium quality RF products and technical support to customers to match the applications’ exact requirements.

Bandpass Filter

cavity bandpass filter

The cavity bandpass filter is part of a wide selection of RFecho’s coaxial RF filters. This band pass filter design with SMA connectors, N Male connectors, or N Female connectors operating a passband Frequency from 0.01 GHz to 67 GHz.

Bandstop Filter

cavity band rejection filter

Cavity band reject filter is also called a bandstop filter or notch filter in the narrow stopband. Our RF band rejection filter is built with SMA Female connectors, N Male, or N Female connectors operating a stopband frequency from 791MHz to 59000MHz.

High Pass Filter

cavity high pass filter

RFecho’s cavity high pass filter (passband frequency from 1.0GHz to 40GHz), also known as a low cut-off filter and low resistance filter, allows frequency higher than a certain cut-off frequency through and greatly attenuates lower frequencies.

Low Pass Filter

cavity low pass filter

RFecho’s cavity low pass filter (passband frequency from DC to 21GHz) is an RF filter that allows signals below the cut-off frequency to pass through, but signals above the cut-off frequency cannot pass through.


  • Increase peak power handling,
  • Reduced Size,
  • Lightweight,
  • Enhanced Rejection,
  • Minimal Temperature Drift.

The RF filter or microwave filter selection varies greatly depending on the application, i.e., size, power handling, frequency range, noise addition, etc. The popular use of these filters includes television, mobile, satellite communications, and radar applications. RFecho provides from individual products to solution package for your requirements.

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