The double band pass filter contains two complete pass bands. Please refer to the graph below.

A common application is to pass two bands of the forward path signals/ channels.

The circuit architecture of this double band pass filter was invented by Soontai.

We can design filters with more than 3 passbands, and even more. Please refer to our triple band pass filters.

Soontai's double band pass filters provide many features (see below).

1. Wide and deep reject band, provides excellent rejection capabilities to clear undesired signal,
    rejection better than 50dB.

2. Lowest insertion loss, signal-through-loss reduced to a minimum.

3. Excellent return loss, good impedance match reduces signal loss to keep the signal clean. (see figure)

4. Dual layer brass tubes provide the best radio frequency interference (RFI) / electromagnetic interference (EMI) protection.

We can design other models according to your specifications.

For more filter products, please see our filter category.

To learn more filter types please see the filter profile technical notes in our Tech Support.

Custom filters or more details on inquires, please refer to Custom Filters.